CN115506724A - Pipeline internal diameter axial, radial and multi-trigger centralizer short section - Google Patents

Abstract

The invention relates to a centralizer short section with axial, radial and multi-trigger inner diameter of a pipeline. Compared with the prior art, the invention is suitable for the occasions with standard section pipelines, sudden change of the inner diameter of the pipeline and more impurities, and the standard section pipelines are pipelines with the same length and the same internal structure of each section of pipeline and play a certain role in righting.

Description

Pipeline internal diameter axial, radial and multi-trigger centralizer short section

Technical Field

The invention relates to the technical field of underground pipeline measurement, in particular to a pipeline inner diameter axial, radial and multi-trigger centralizer short section.

Background

The existing underground pipeline measurement records the length of a through pipe through a pulley block or a measuring instrument pull rope, the pulley block mode cannot be suitable for the conditions of small pipelines and pipeline inner diameter size mutation and more impurities, the situation that the pulley block is blocked or even blocked possibly occurs when the size mutation occurs, and the impurities in the pipelines can also influence smooth rotation of pulleys, so that the measurement precision of the length is influenced. The rope pulling mode needs a device for recording the length of the rope to be arranged outside the pipeline, and is not suitable for a wireless measuring system.

The structure of many underground pipelines is all including a plurality of isometric and the same tube coupling of inner structure, is equipped with the path structure of internal diameter sudden change between two adjacent tube couplings.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a pipeline inner diameter axial, radial and multi-trigger centralizer pup joint which can be used for measuring the length of a standard joint pipeline with a small inner diameter and an abrupt change of the inner diameter.

The purpose of the invention can be realized by the following technical scheme:

a pipeline inner diameter axial triggering centralizer nipple is used for a pipeline which comprises a plurality of equal-length pipe joints with the same inner structure, a small-diameter structure with a suddenly-changed inner diameter is arranged between every two adjacent pipe joints, the pipeline inner diameter axial triggering centralizer nipple comprises a connector socket, a proximity switch, a switch triggering structure, a compression spring, a guide pin, a centralizer sliding block, a centralizer shrapnel, a connector plug and a shell structure for fixing the whole nipple,

the centralizer elastic sheet is positioned on the outer side of the shell structure, one end of the centralizer elastic sheet is connected with the shell structure, and the other end of the centralizer elastic sheet is connected with the centralizer sliding block; the proximity switch, the switch triggering structure, the compression spring, the guide pin and the centralizer slide block are all located on the inner side of the shell structure, the centralizer slide block is respectively connected with the switch triggering structure and the guide pin, the centralizer slide block is movably connected with the shell structure, the proximity switch and the compression spring are both fixed by the shell structure, the switch triggering structure is right opposite to the proximity switch, the guide pin is right opposite to the compression spring, the proximity switch is respectively connected with the connector socket and the connector plug and used for acquiring electric energy and transmitting contact signals, and the pipeline length is calculated according to the number of the contact signals and the length of a single pipe joint acquired in advance.

Furthermore, the number of the centralizer elastic sheets is multiple, and the switch triggering structure triggers the proximity switch when all the centralizer elastic sheets are compressed by adjusting the elasticity, the thickness or the radian of the material of the centralizer elastic sheets, or the specification of a compression spring and the position or the length of the switch triggering structure.

Further, the switch triggering structure comprises a triggering pin and a triggering pin adjusting block, the triggering pin adjusting block is installed on the centralizer sliding block, the triggering pin is installed on the triggering pin adjusting block, and the triggering pin is opposite to the proximity switch.

Further, the pipeline inner diameter axial triggering centralizer short section further comprises a linear bearing, the linear bearing is sleeved on the shell structure shaft, and the linear bearing is connected with the centralizer sliding block through a screw.

Further, shell structure includes the connector fixed plate, connects plug-in components seat, centralizer rear end shell, switch visor, triggers nipple joint protection casing and centralizer front end shell, connector socket, connector fixed plate and connector seat connect gradually, the connector seat is installed inside the centralizer rear end shell, the centralizer rear end shell outside is equipped with the proximity switch mounting groove, proximity switch installs in the proximity switch mounting groove, the switch visor is installed in the proximity switch outside, the bow-shaped portion that rises of centralizer shell fragment is located trigger nipple joint protection casing outside, centralizer shell fragment both ends are located trigger nipple joint protection casing is inboard, the connector plug is installed centralizer front end shell is inboard, switch trigger structure, compression spring, uide pin and centralizer slider all are located trigger nipple joint protection casing inboard, centralizer rear end shell, trigger protection casing and centralizer front end shell connect gradually.

Furthermore, a sealing ring is arranged on the outer side of the front end shell of the centralizer.

The invention also provides a pipeline inner diameter radial triggering centralizer short section which is used for a pipeline comprising a plurality of pipe sections with same length and same internal structure, a small-diameter structure with suddenly changed inner diameter is arranged between two adjacent pipe sections, the pipeline inner diameter radial triggering centralizer short section comprises a connector socket, a proximity switch, a centralizer elastic sheet, a triggering pin, a chute cover plate, a sliding column, a connector plug and a shell structure for fixing the whole short section,

the centralizer elastic sheet and the chute cover plates are located on the outer side of the shell structure, the number of the chute cover plates is multiple, the chute cover plates are connected with the shell structure, each chute cover plate is provided with a chute for the sliding column to move, two ends of the centralizer elastic sheet are movably connected with the sliding cover plates through the sliding columns respectively, and the middle of the centralizer elastic sheet is connected with a trigger pin;

the proximity switch is located on the inner side of the shell structure, the trigger pin penetrates through the shell structure and faces the proximity switch, the proximity switch is connected with the socket connector and the plug connector respectively and used for obtaining electric energy and transmitting contact signals, and the length of a pipeline is calculated according to the number of the contact signals and the length of a single pipe joint obtained in advance.

Furthermore, the number of the centralizer elastic sheets is one or more, each centralizer elastic sheet corresponds to one proximity switch, if all the proximity switches are triggered, the contact signal at the moment is recorded, and if not, the contact signal is used as an invalid contact signal.

Furthermore, a sealing ring is arranged on the outer side of one end, connected with the connector plug, of the shell structure.

The invention also provides a multi-trigger centralizer short section based on the two trigger centralizer short sections, and a structure consisting of the proximity switch, the switch trigger structure, the compression spring, the guide pin, the centralizer sliding block and the centralizer elastic sheet for triggering the centralizer short section is used as a trigger component; taking a structure consisting of the proximity switch, the centralizer elastic sheet, the trigger pin, the chute cover plate and the sliding column in the other trigger centralizer short section as a trigger component;

many trigger centralizer nipple joints include a plurality of trigger subassembly, connector socket, connector plug and the shell structure of fixed whole nipple joint, it is a plurality of the trigger subassembly connects gradually, it is a plurality of proximity switch in the trigger subassembly equally divide and do not connect connector socket and connector plug for acquire electric energy and transmission contact signal, according to a plurality of proximity switch's contact signal and connection order, judge and reject the pumpback signal, thereby according to the number of surplus contact signal and the length of the single tube coupling that acquirees in advance, calculate pipeline length.

Compared with the prior art, the invention has the following advantages:

the invention provides a centralizer pup joint capable of carrying an underground pipeline inertial navigation system or other measuring instruments, wherein when the path is triggered, namely the pipe is suddenly changed into the path through a pipeline in the process of communicating the pipe, the centralizer elastic sheet is pressed to deform so as to trigger a switch signal, and the number of pipe joints in the underground pipeline is recorded by the switch signal, so that the length of the pipeline is obtained.

Drawings

FIG. 1 is a diagram of a process of triggering a pipe through a short section of a minor-diameter triggering centralizer;

FIG. 2 is an external view of a nipple of an axial triggering centralizer;

FIG. 3 is a sectional view and a working process diagram of a nipple of an axial triggering centralizer;

FIG. 4 is an exploded view of a nipple of an axial triggering centralizer;

in fig. 3 and 4, 1 is a connector holder, 2 is a centralizer rear end shell, 3 is a screw a,4 is a switch pressing sheet, 5 is a switch protection cover, 6 is a proximity switch, 7 is an O-shaped sealing ring a,8 is a trigger pin, 9 is a centralizer sliding block, 10 is a trigger pin adjusting block, 11 is a screw B,12 is a linear bearing, 13 is a centralizer elastic sheet, 14 is a trigger short section protection cover, 15 is a centralizer front end shell, 16 is an O-shaped sealing ring B,17 is a connector plug, 18 is a guide pin, 19 is a compression spring, 20 is a connector socket, 21 is a connector fixing plate, 22 is a screw C,23 is a screw D,24 is a screw E,25 is a screw F,26 is a screw G,27 is a screw H;

FIG. 5 is a view of the state inside a pressure pipe of a short section elastic sheet of the axial triggering centralizer;

FIG. 6 is an external view of a radial triggered centralizer short section;

FIG. 7 is a cross-sectional view of a radial triggered centralizer sub;

FIG. 8 is an exploded view of a radial triggered centralizer sub;

in fig. 7 and 8, 1, a connector holder, 2, a centralizer support, 3, screws a,4, an adapter plate, 5, a chute cover plate, 6, a sliding column, 7, screws b,8, screws c,9, a proximity switch, 10, a centralizer elastic sheet, 11, screws d,12, a trigger pin, 13, an O-shaped sealing ring, 14, a connector plug, 15, screws e,16, a switch support, 17, a connector socket, 18, a connector fixing plate, 19, screws f,20, screws g,21 and screws h;

fig. 9 is a schematic diagram (separated) of a double-triggered centralizer short section, in which (1) is an axial triggered centralizer short section; (2) the centralizer short section is triggered in the radial direction;

FIG. 10 is a schematic diagram (integrated type) of a short section of a double-trigger centralizer, wherein the schematic diagram comprises a trigger short section protective cover I, a trigger short section protective cover II, a trigger short section front end III, a proximity switch cabin IV, a front-end trigger sliding block IV, a centralizer elastic sheet V, a trigger short section middle shaft VI, a trigger short section VII, a rear-end trigger sliding block VIII and a trigger short section rear end;

FIG. 11 is a front view of a dual triggered centralizer sub.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The embodiment provides a minor diameter triggering centralizer short section, in particular to an instrument centralizing and minor diameter triggering device in a pipeline, when the minor diameter is triggered, namely a through pipe is suddenly changed into the minor diameter in the process of through pipe, a centralizer elastic sheet is pressed to deform, so that a switch signal is triggered, the number of pipe sections in an underground pipeline is recorded, the length of the pipeline is obtained, the centralizer short section is suitable for occasions with standard pipeline sections (the length of each pipeline section is the same as the length of the internal structure) and sudden change of the pipe inner diameter and more impurities, for example, a standard drill collar and the like, and the working process is shown in figure 1.

The minor-diameter triggering centralizer short section has two forms, namely an axial triggering centralizer short section and a radial triggering centralizer short section, which are described below respectively.

Example 1

The embodiment provides a pipeline inner diameter axial triggering centralizer short section which is used for a pipeline comprising a plurality of pipe sections with the same length and the same internal structure, wherein a small-diameter structure with a suddenly-changed inner diameter is arranged between every two adjacent pipe sections, the pipeline inner diameter axial triggering centralizer short section comprises a connector socket, a proximity switch, a switch triggering structure, a compression spring, a guide pin, a centralizer sliding block, a centralizer shrapnel, a connector plug and a shell structure for fixing the whole short section,

the centralizer elastic sheet is positioned on the outer side of the shell structure, one end of the centralizer elastic sheet is connected with the shell structure, and the other end of the centralizer elastic sheet is connected with the centralizer sliding block; proximity switch, switch trigger structure, compression spring, uide pin and centralizer slider all are located shell structure inboard, the centralizer slider is connect switch trigger structure and uide pin respectively, centralizer slider movable connection shell structure, proximity switch and compression spring all receive shell structure fixed, switch trigger structure is just to proximity switch, the uide pin is just to compression spring, proximity switch connects connector socket and connector plug respectively, be used for acquireing the electric energy and transmitting contact signal, the length of single tube coupling according to contact signal's number and acquireing in advance, calculate pipeline length.

The number of centralizer clips may be one or more,

when the number of the elastic sheets of the centralizer is multiple, the elastic sheets are designed to drive the sliding block for avoiding false triggering, when a single elastic sheet or a plurality of the elastic sheets are pressed, the sliding block is not enough pushed, and only when all the elastic sheets are pressed, the sliding block can be pushed to generate a triggering signal. In order to achieve the above situation, the switch triggering structure triggers the proximity switch when all the centralizer shrapnels are compressed by adjusting the elasticity, thickness or radian of the material of the centralizer shrapnel, or the specification of the compression spring and the position or length of the switch triggering structure.

In this embodiment, the switch triggering structure includes a trigger pin and a trigger pin adjusting block, the trigger pin adjusting block is installed on the centralizer slide block, the trigger pin is installed on the trigger pin adjusting block, and the trigger pin is opposite to the proximity switch.

In order to ensure that the centralizer sliding block moves linearly, as a preferred implementation mode, the pipeline inner diameter axial triggering centralizer short section further comprises a linear bearing, the linear bearing is sleeved on the shell structure shaft, and the linear bearing is connected with the centralizer sliding block through a screw.

In this embodiment, shell structure specifically includes the connector fixed plate, connects plug-in components seat, centralizer rear end shell, switch visor, triggers nipple joint protection casing and centralizer front end shell, and connector socket, connector fixed plate and connector seat connect gradually, and the connector seat is installed inside the centralizer rear end shell, and the centralizer rear end shell outside is equipped with the proximity switch mounting groove, and proximity switch installs in the proximity switch mounting groove, and the switch visor is installed in the proximity switch outside, the bow-shaped portion that rises of centralizer shell fragment is located the short section protection casing outside triggers, centralizer shell fragment both ends are located trigger nipple joint protection casing is inboard, and the connector plug is installed at centralizer front end shell inboard, and switch trigger structure, compression spring, uide pin and centralizer nipple joint slider all are located trigger protection casing inboard, and centralizer rear end shell, trigger protection casing and centralizer front end shell connect gradually.

The following describes a preferred embodiment of a pipeline id axially triggered centralizer sub.

The structure of the short section of the axial triggering centralizer is shown in figures 2, 3 and 4, and the specific assembly relationship is as follows: thesocket connector 20 is fixed on the socketconnector fixing plate 21 through a self-contained mounting accessory, the socketconnector fixing plate 21 is fixed on thesocket connector seat 1 through a screw C22, thesocket connector seat 1 is fixed on the centralizerrear end shell 2 through a screw D23, theproximity switch 6 is fixed on the centralizerrear end shell 2 through aswitch pressing sheet 4 and a screw A3, a lead at the tail part of theproximity switch 6 is connected with thesocket connector 20 and thesocket connector plug 17, theswitch protection cover 5 is fixed on the centralizerrear end shell 2 through a screw E24, thetrigger pin 8 is fixed on the triggerpin adjusting block 10 through a thread at the tail part, the triggerpin adjusting block 10 is fixed on thecentralizer sliding block 9 through a screw F25, theguide pin 18 is fixed on thecentralizer slide block 9 through the thread at the tail part, thecentralizer slide block 9 is connected with thelinear bearing 12 through the screw G26, the O-shaped seal ring A7 is sleeved on the centralizerfront end shell 15, the thin shaft end of the centralizerfront end shell 15 is inserted into the hole of the centralizerrear end shell 2, one end of each of the four centralizerelastic pieces 13 is fixed on thecentralizer slide block 9 through the screw B11, the other end of each of the four centralizer elastic pieces is fixed on the centralizerfront end shell 15, the guide pin 18 abuts against thecompression spring 19 and is inserted into the hole of the centralizerrear end shell 2, the trigger short sectionprotective cover 14 is connected with the centralizerrear end shell 2 through one end of the screw H27, the other end of the trigger short section protective cover is connected with the centralizerfront end shell 15, and the O-shaped seal ring B16 is sleeved on the centralizerfront end shell 15.

The working process is shown in figure 3 specifically as follows: when the axial trigger centralizer short section passes through the pipeline with a small diameter, centralizerelastic sheets 13 which are perpendicular to each other in four directions are compressed and deformed to dotted line positions, the right end is fixed, the left end is connected with acentralizer sliding block 9 and a linear bearing 12, thecentralizer sliding block 9 and thelinear bearing 12 are pushed to move leftwards, so that atrigger pin 8 moves to a sensitive position (dotted line position) of aproximity switch 6, theproximity switch 6 is triggered to generate a trigger signal, the signal is transmitted to a corresponding instrument at the right end through aconnector plug 17 and is recorded, and in addition, power required by theproximity switch 6 is supplied through aconnector socket 20. The linear bearing 12 is a water-resistant and impurity-resistant linear bearing, so that the pushing process is smooth. Through adjustingcentralizer shell fragment 13 material, thickness or radian, andcompression spring 19's specification, and the adjustment triggers the left and right sides position (the rectangular hole adjustable position of design on the round pin adjusting block 10) of roundpin adjusting block 10, the length oftrigger pin 8 anduide pin 18, can make this nipple joint adjust to compress one or wherein two, threecentralizer shell fragment 13 can't promotecentralizer slider 9 and linear bearing 12, thereby can'ttrigger proximity switch 6, only fourcentralizer shell fragments 13 compress the state that just can triggerproximity switch 6 simultaneously, reached the effect of avoiding the spurious triggering, thereby avoided the spurious triggering signal that the striking produced in the pipeline, see figure 5 specifically. Becausecentralizer shell fragment 13,compression spring 19, trigger roundpin adjusting block 10, trigger roundpin 8,uide pin 18 all can be adjusted, this nipple joint that makes can adapt to more pipe internal diameters through the adjustment to adapt to more application scenarios, O shape sealing washer A7 and O shape sealing washer B16 can make this nipple joint waterproof, trigger nipplejoint protection casing 14 can protect inner structure to avoid striking and the entering of bold impurity. The left end and the right end of the short section are standard threaded interfaces, and different devices and instruments can be carried on the short section.

The short section is triggered by the axial displacement of the trigger pin so as to trigger the proximity switch, and therefore, the structure is an example of the structure, and is not limited to four centralizer shrapnels, two, three and the like, and all fall within the range in which the invention can be implemented, and the structural forms of a plug, a socket, a proximity switch, a linear bearing and the like of a connector used in the structure are not limited to the forms in the example.

Example 2

The embodiment provides a pipeline inner diameter radial triggering centralizer short section which is used for a pipeline comprising a plurality of pipe sections with same length and same internal structure, wherein a small-diameter structure with suddenly changed inner diameter is arranged between every two adjacent pipe sections, the pipeline inner diameter radial triggering centralizer short section comprises a connector socket, a proximity switch, a centralizer shrapnel, a triggering pin, a chute cover plate, a sliding column, a connector plug and a shell structure for fixing the whole short section,

the centralizer elastic sheet and the chute cover plates are positioned on the outer side of the shell structure, the number of the chute cover plates is multiple, the chute cover plates are connected with the shell structure, each chute cover plate is provided with a chute for the movement of the sliding column, two ends of the centralizer elastic sheet are movably connected with the sliding cover plates through the sliding columns respectively, and the middle part of the centralizer elastic sheet is connected with a trigger pin;

the proximity switch is located the shell structure inboard, and the trigger pin runs through the shell structure to just to proximity switch, proximity switch connect connector socket and connector plug respectively for obtain the electric energy and transmit the contact signal, according to the number of contact signal and the length of the single tube coupling that obtains in advance, calculate pipeline length.

The number of the centralizer elastic pieces is one or more, each centralizer elastic piece corresponds to one proximity switch, in order to avoid false triggering, if all the proximity switches are triggered, the contact signal at the moment is recorded, and otherwise, the contact signal is used as an invalid contact signal.

Preferably, a sealing ring is arranged on the outer side of one end of the shell structure connected with the connector plug.

The following describes a preferred embodiment of a pipeline id radial triggered centralizer sub.

The structure of the short section of the radial triggering centralizer in the embodiment is shown in fig. 6, 7 and 8, and the specific assembly relationship is as follows: theconnector socket 17 is fixed on theconnector fixing plate 18 through a self-contained accessory, theconnector fixing plate 18 is fixed on theconnector seat 1 through a screw f19, theconnector seat 1 is fixed on theadapter plate 4 through a screw a3, theadapter plate 4 is fixed on theswitch support 16 through a screw g20, theswitch support 16 is fixed on thecentralizer support 2 through a screw e15, the threeproximity switches 9 are fixed on theswitch support 16 through a screw c8, tail leads of the threeproximity switches 9 are connected with theconnector socket 17 and theconnector plug 14, the six slidingcolumns 6 are respectively placed in six grooves of thecentralizer support 2, the six slidinggroove cover plates 5 are fixed on thecentralizer support 2 through screws h21, the three centralizerelastic sheets 10 are respectively connected with the threetrigger pins 12 through screws d11, two ends of the three centralizerelastic sheets 10 are connected with the slidingcolumns 6 through screws b7, and the O-shapedsealing ring 13 is sleeved on thecentralizer support 2.

The working process is shown in FIG. 7 specifically as follows: when the short section of the radial triggering centralizer passes through the small diameter of a pipeline, the three centralizer elastic sheets 10 are deformed under pressure, so that the three triggering pins 12 are respectively pushed to move to the positions of dotted lines in a sensitive position diagram of the proximity switches 9, the three proximity switches 9 are triggered, triggering signals of the three proximity switches 9 are transmitted to a judging end of a right-end instrument through the connector plugs 14, when the judging end judges that the three proximity switches 9 are triggered simultaneously, the short section is judged to pass through the small diameter and record data, the three proximity switches 9 are respectively triggered independently, so that false triggering caused by collision when the short section does not pass through the small diameter can be avoided, namely one to two proximity switches 9 are triggered, the judgment is not triggered, power required by the three proximity switches 9 is supplied by the connector socket 17, the O-shaped sealing ring 13 enables the short section to play a waterproof role when the short section is connected with other instruments, the short section is designed in an integral type, namely all components are arranged on the integrated centralizer support 2, so that the performances of water resistance, dust resistance and impurities are improved, the left end and right end of the short section are standard threaded interfaces, and different equipment and instruments can be carried.

The triggering mode of the short section is that the triggering pin generates displacement in the radial direction so as to trigger the proximity switch, so that the centralizer short section is triggered in the radial direction, the structure is only one example, the structure is not limited to three centralizer shrapnels, two or four, and the like, and the structure is all in a protection range, and the structure forms of a plug, a socket, the proximity switch and the like of a connector used in the structure are not limited to the forms in the example.

Example 3

In order to avoid false triggering, a plurality of elastic sheets are designed to trigger corresponding proximity switches respectively, a single elastic sheet or a plurality of elastic sheets trigger the corresponding proximity switches respectively when being pressed, and the trigger signals can be generated only when all the proximity switches are triggered.

Double-triggering or multi-triggering short section can be used for the situation that the pipe is blocked or other instruments need to be drawn back and forth in the pipe passing process, the signal triggered by back pumping can be avoided being counted into length calculation, and the specific principle is as follows: when the pipe is communicated, the elastic sheet group of the front end centralizer of the short section firstly passes through the small diameter of the pipeline and is triggered, the elastic sheet group of the rear end centralizer is triggered after being delayed for a certain time, the delay time depends on the central interval of the two groups of the elastic sheet groups of the centralizer, when the instrument needs to be drawn back, the elastic sheet group of the rear end centralizer is triggered firstly, the elastic sheet of the front end centralizer is triggered secondly, whether the trigger signal is the trigger signal generated in the drawing back process or not can be judged according to the front and rear trigger intervals and the trigger sequence, the signals are rejected, and therefore the false triggering can be avoided, and the length of the pipeline can be measured correctly, and the figure 11 shows.

In this embodiment, a multi-trigger centralizer sub based on a pipeline inner diameter axial trigger centralizer sub as inembodiment 1 orembodiment 2, a structure composed of a proximity switch, a switch trigger structure, a compression spring, a guide pin, a centralizer sliding block and a centralizer elastic sheet inembodiment 1 is used as a trigger component; a structure composed of the proximity switch, the centralizer elastic sheet, the trigger pin, the sliding chute cover plate and the sliding column in theembodiment 2 is used as a trigger component;

the multi-trigger centralizer short section comprises a plurality of trigger assemblies, a connector socket, a connector plug and a shell structure for fixing the whole short section, the trigger assemblies are connected in sequence, proximity switches in the trigger assemblies are equally divided to be connected with the connector socket and the connector plug respectively, the electric energy and the transmission contact signals are acquired, the pumpback signals are judged and rejected according to the contact signals and the connection sequence of the proximity switches, the number of the residual contact signals and the length of a single pipe section acquired in advance are calculated, and the length of a pipeline is calculated.

The following describes in detail an optimal embodiment of a multi-triggered centralizer sub for a pipeline inside diameter axial triggering centralizer sub.

Two triggering short sections in the form of the embodiment 1 or the embodiment 2 are connected together or combined into a whole according to the structural principle to form a double-triggering centralizer short section, which is shown in fig. 9 and 10, and fig. 9 shows that the two triggering short sections are butted end to end through a standard threaded interface and an electrical interface; fig. 10 shows that the structure is designed into an integral structure by the same principle to reduce the interfaces of parts, machinery and electrical equipment, specifically, one end of each of two sets of centralizer elastic pieces v is fixed with a trigger short section center shaft vi, the other end of each centralizer elastic piece is fixed with a front-end trigger sliding block iv and a rear-end trigger sliding block vii, the front-end trigger sliding block iv and the rear-end trigger sliding block vii are respectively installed on two end shafts of the trigger short section center shaft vi, a trigger short section front end ii and a trigger short section rear end viii are respectively butted with the trigger short section center shaft vi, a trigger short section protective cover i is fixed on the trigger short section center shaft vi, two ends of the trigger short section protective cover i are connected with the trigger short section front end ii and the trigger short section rear end viii, wherein both the trigger short section front end ii and the trigger short section rear end viii have proximity switch compartments, and the proximity switch compartments iii, the front-end trigger sliding block iv and the rear-end trigger sliding block vii are specifically composed into the axial and radial triggering in embodiment 1 and embodiment 2, and the double triggering principle is the same as the above triggering operation principle.

The double-triggering short section can be used for the situation that the instrument needs to be drawn back and forth when jamming occurs in the pipe passing process, the signal triggered by the back pumping can be prevented from being counted into length calculation, and the specific principle is as follows: when the pipe is communicated, the elastic sheet group of the front end centralizer of the short section firstly passes through the small diameter of the pipeline and is triggered, the elastic sheet group of the rear end centralizer is triggered after being delayed for a certain time, the delay time depends on the central interval of the two groups of the elastic sheet groups of the centralizer, when the instrument needs to be drawn back, the elastic sheet group of the rear end centralizer is triggered firstly, the elastic sheet of the front end centralizer is triggered secondly, whether the trigger signal is the trigger signal generated in the drawing back process or not can be judged according to the front and rear trigger intervals and the trigger sequence, the signals are rejected, and therefore the false triggering can be avoided, and the length of the pipeline can be measured correctly, and the figure 11 shows.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the above teachings. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A pipeline inner diameter axial triggering centralizer short section is used for a pipeline which comprises a plurality of pipe sections with same length and same internal structure, and a small-diameter structure with suddenly changed inner diameter is arranged between two adjacent pipe sections, and is characterized in that the pipeline inner diameter axial triggering centralizer short section comprises a connector socket, a proximity switch, a switch triggering structure, a compression spring, a guide pin, a centralizer sliding block, a centralizer elastic sheet, a connector plug and a shell structure for fixing the whole short section,

the centralizer elastic sheet is positioned on the outer side of the shell structure, one end of the centralizer elastic sheet is connected with the shell structure, and the other end of the centralizer elastic sheet is connected with the centralizer sliding block; the proximity switch, the switch triggering structure, the compression spring, the guide pin and the centralizer slide block are all located on the inner side of the shell structure, the centralizer slide block is respectively connected with the switch triggering structure and the guide pin, the centralizer slide block is movably connected with the shell structure, the proximity switch and the compression spring are both fixed by the shell structure, the switch triggering structure is right opposite to the proximity switch, the guide pin is right opposite to the compression spring, the proximity switch is respectively connected with the connector socket and the connector plug and used for acquiring electric energy and transmitting contact signals, and the pipeline length is calculated according to the number of the contact signals and the length of a single pipe joint acquired in advance.

2. The pipe inner diameter axial-triggering centralizer short section of claim 1, wherein the number of the centralizer shrapnels is multiple, and the switch triggering structure triggers the proximity switch by adjusting the elasticity, thickness or radian of the material of the centralizer shrapnel, or the specification of a compression spring and the position or length of a switch triggering structure when all the centralizer shrapnels are compressed.

3. The pipeline inner diameter axial triggering centralizer short section of claim 1, wherein the switch triggering structure comprises a triggering pin and a triggering pin adjusting block, the triggering pin adjusting block is mounted on the centralizer slide block, the triggering pin is mounted on the triggering pin adjusting block, and the triggering pin is opposite to the proximity switch.

4. The pipeline id axially triggered centralizer sub of claim 1, wherein the pipeline id axially triggered centralizer sub further comprises a linear bearing sleeved on the housing structure shaft, the linear bearing being connected with a centralizer sliding block by a screw.

5. The pipeline inner diameter axial triggering centralizer nipple of claim 1, wherein the shell structure comprises a connector fixing plate, a connector connecting seat, a centralizer rear end shell, a switch protection cover, a triggering nipple protection cover and a centralizer front end shell, the connector socket, the connector fixing plate and the connector seat are sequentially connected, the connector seat is installed inside the centralizer rear end shell, a proximity switch installation groove is formed in the outer side of the centralizer rear end shell, a proximity switch is installed in the proximity switch installation groove, the switch protection cover is installed on the outer side of the proximity switch, an arched rising part of a centralizer elastic sheet is located on the outer side of the triggering nipple protection cover, two ends of the centralizer elastic sheet are located on the inner side of the triggering nipple protection cover, a connector plug is installed on the inner side of the centralizer front end shell, the switch triggering structure, a compression spring, a guide pin and a centralizer sliding block are located on the inner side of the triggering nipple protection cover, and the centralizer rear end shell, the triggering nipple protection cover and the centralizer front end shell are sequentially connected.

6. The pipeline inner diameter axial triggering centralizer short section of claim 1, characterized in that a sealing ring is arranged on the outer side of the centralizer front end shell.

7. A pipeline internal diameter radial triggering centralizer short section is used for a pipeline which comprises a plurality of pipe sections with same length and same internal structure, and a small-diameter structure with suddenly changed internal diameter is arranged between two adjacent pipe sections, and is characterized in that the pipeline internal diameter radial triggering centralizer short section comprises a connector socket, a proximity switch, a centralizer shrapnel, a triggering pin, a chute cover plate, a sliding column, a connector plug and a shell structure for fixing the whole short section,

the centralizer elastic sheet and the chute cover plates are located on the outer side of the shell structure, the number of the chute cover plates is multiple, the chute cover plates are connected with the shell structure, each chute cover plate is provided with a chute for the sliding column to move, two ends of the centralizer elastic sheet are movably connected with the sliding cover plates through the sliding columns respectively, and the middle of the centralizer elastic sheet is connected with a trigger pin;

the proximity switch is located on the inner side of the shell structure, the trigger pin penetrates through the shell structure and faces the proximity switch, the proximity switch is connected with the socket connector and the plug connector respectively and used for obtaining electric energy and transmitting contact signals, and the length of a pipeline is calculated according to the number of the contact signals and the length of a single pipe joint obtained in advance.

8. The pipe inner diameter radial-triggering centralizer short section of claim 7, wherein the number of the centralizer shrapnels is one or more, each centralizer shrapnel corresponds to one proximity switch, if all the proximity switches are triggered, a contact signal at the moment is recorded, and otherwise, the contact signal is used as an invalid contact signal.

9. The pipeline inner diameter radial triggering centralizer sub of claim 7, wherein a sealing ring is arranged on the outer side of one end of the shell structure, which is connected with the connector plug.

10. A multi-triggering centralizer sub based on the pipeline inner diameter axial triggering centralizer sub of claim 1 or the pipeline inner diameter radial triggering centralizer sub of claim 7, wherein the structure consisting of the proximity switch, the switch triggering structure, the compression spring, the guide pin, the centralizer sliding block and the centralizer elastic sheet in claim 1 is used as a triggering component; the structure composed of the proximity switch, the centralizer elastic sheet, the trigger pin, the chute cover plate and the sliding column in claim 7 is used as a trigger component;

the multi-trigger centralizer short section comprises a plurality of trigger assemblies, a connector socket, a connector plug and a shell structure for fixing the whole short section, the trigger assemblies are sequentially connected, the proximity switches in the trigger assemblies are equally divided and respectively connected with the connector socket and the connector plug and are used for acquiring electric energy and transmitting contact signals, and according to the contact signals and the connection sequence of the proximity switches, the pumpback signals are judged and eliminated, so that the pipeline length is calculated according to the number of the residual contact signals and the length of a single pipe section acquired in advance.

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