CN101899954A - Depth positioner of well-entry tool and positioning method - Google Patents

Abstract

The invention belongs to the industry of gasoline natural gas, in particular to a depth positioner of a well-entry tool and a positioning method for precisely positioning an in-well construction tool in the downhole operation process. The positioner comprises a positioning steel ball, a steel ball loading body, a steel ball work sliding bush, a reset spring, a throttling device port and a continuous oil pipe adaptor, wherein the continuous oil pipe adaptor is connected with the steel ball loading body, the inside diameter of a middle section is larger than the outside diameter which is matched with the inside diameter of a sleeve, and the inside diameter is matched with a raised section of the steel ball work sliding bush; the two ends of the steel ball work sliding bush are matched with sections with small inside diameter of the steel ball loading body; the middle part with large outside diameter in the steel ball loading body is provided with a circumferential hole in which the positioning ball is arranged; a reset spring base is arranged at the bottom of the steel ball work sliding bush; and the throttling device port is arranged in the middle of the steel ball work sliding bush where certain throttling pressure difference is formed. By using the invention, a construction tool connected to the oil pipe can be precisely lowered into an oil-gas layer part which is concretely required.

Description

Depth positioner of well-entry tool and localization method

Technical field

The invention belongs to oil and gas industry, to pinpoint depth positioner of well-entry tool of construction tool in the well and localization method, be used for the accurate screens of pressure break or testing tool in the particularly underground work process.

Background technology

Underground work is the pressure break of carrying out in sleeve pipe mostly, test, and well testing, operations such as well workover, various operations all require the power tool of institute's G.I.H is carried out accurate in locating in sleeve pipe, otherwise the oil-gas Layer position of the inaccurate institute of card operation, can't operation.For the well of the strict location of instrument, often adopt cable to position, as the location of deep-well separate stratum fracfturing construction tool; For the less relatively layer position of interlayer between the layer position, because of cable machinery few, the construction cost height, the normal employing closed the mode that lamination splits construction and constructed, make relatively than broad oil-gas Layer, because of construction tool can not accurately be located, and do not transform, had a strong impact on the evaluation and the development effectiveness of oil-gas Layer.

The coiled tubing that development in recent years is got up, also in well, can not carry out accurate localization because of its band instrument, can not carry out hydraulic jet perforation and pressing crack construction integration of operation, make the application of domestic coiled tubing aspect pressing crack construction be very restricted, the accurate depth localization problem of coiled tubing in well also is a big technical barrier.

Pressing crack construction is wanted the oil pipe of several kms of G.I.H, oil pipe is behind G.I.H, and its weight reaches the 30-40 ton, and its deadweight elongation is difficult to accurately calculate, tend to occur the phenomenon of the inaccurate oil-gas Layer of construction tool card, can cause the oil gas lamination not hold or the incomplete conclusion of perforation to the constructor.

Summary of the invention

The purpose of this invention is to provide a kind of depth positioner of well-entry tool and localization method, so as can will to be connected construction tool on the oil pipe accurately be lowered into the oil-gas Layer position of specific requirement.

The object of the present invention is achieved like this, depth positioner of well-entry tool, it is characterized in that: it comprises locking ball, steel ball pack into body, steel ball work sliding bush, back-moving spring, restriction choke mouth and coiled tubing connector, the coiled tubing connector connects the steel ball body of packing into, the steel ball body of packing into is the hollow body, its interlude internal diameter and external diameter are big, and external diameter cooperates with casing inner diameter, and internal diameter cooperates with the raised section of steel ball work sliding bush; Steel ball work sliding bush two ends and the steel ball little section of body two ends internal diameter of packing into cooperates, makes the steel ball work sliding bush mobile in steel ball is packed body into; There are all circular holes the steel ball big middle part, inside and outside footpath of packing into, locking ball is arranged in the circular hole, the external diameter of locking ball is greater than described circular hole external diameter, only some is betrayed outside steel ball is packed the body circular hole into to make locking ball, steel ball work sliding bush bottom has return spring holder, back-moving spring to put into the back-moving spring pedestal by the base plate back cover; There is the restriction choke mouth centre of steel ball work sliding bush, and the place forms certain chock pressure difference at the restriction choke mouth, makes the steel ball work sliding bush that certain downward thrust be arranged, and thrust is opposite with the screen resilience of back-moving spring downwards.

The localization method of depth positioner of well-entry tool the steps include:

1) length data of utilizing coiled tubing or oil pipe ground to write down will be gone into well tool depth localization body and will be lowered into the first short sleeve box cupling place;

2) in oil pipe or coiled tubing, be circulated to the sleeve pipe internal return and go out, form certain chock pressure difference, make the steel ball work sliding bush that certain downward thrust be arranged at the restriction choke mouth place of going into well tool depth localization body with the discharge capacity of 100-300l/min;

3) adopt the liquid of direct circulation on one side, the mode of up and down coiled tubing in one side or coiled tubing, at the first short sleeve box cupling place in several meters the scope, well tool depth localization body is gone in activity, when going into well tool depth localization body when running into the first short sleeve box cupling, locking ball can enter the first short sleeve box cupling 10 and the second short sleeve box cupling joint;

4) stop the circulation of liquid in the oil pipe, the steel ball work sliding bush moves up under the effect of back-moving spring, and locking ball moves in steel ball is packed body into, makes into well tool positioning body and the disengagement of the first short sleeve box cupling;

5) at this moment, tubing string can move up and down in well, adopts above identical mode, seeks the second short sleeve box cupling;

6) when the length of two short sleeve box cuplings equals the short sleeve length of short sleeve box cupling, at this moment, the depth location of other instrument in well that is connected on the oil pipe is exactly its real degree of depth;

7) when the distance between two box cuplings during greater than the length of location short sleeve, then short sleeve is not found in explanation, returns for the 3rd step and continue to seek.

Operating principle of the present invention and advantage are: the working method that is similar to the hydraulic fluid pipeline fast connector.In the time of near oil pipe is lowered into the short sleeve box cupling, for accurate location, it is the link slot of locator steel ball that casing coupling is used as.Be connected with the coiled tubing connector in the oil pipe bottom, in the time will surveying the short sleeve box cupling, in oil pipe, carry out the circulation of float amount, its choke pressure makes the steel ball location be with the thrust that moves down, move down oil pipe in well, when running into casing coupling, steel ball is released in housing, be sitting in the casing coupling place, at this moment, will find that the weight of oil pipe changes, even oil pipe can be sitting in the casing coupling place, or else oil pipe can fall, and illustrates to have found casing coupling.Adopt and seek another box cupling of short sleeve in the same way.Distance when two casing couplings, when reaching the length of location short sleeve, illustrate the OIH pipe just definite with the particular location of instrument, be lowered to the oil pipe of respective length again and adjust pipe nipple, be lowered into the oil-gas Layer position of specific requirement with being connected construction tool on the oil pipe, reach its pinpoint requirement.

Description of drawings

The invention will be further described below in conjunction with the embodiment accompanying drawing:

Fig. 1 is the embodiments of the invention structural representations;

Fig. 2 is a technological principle schematic diagram of the present invention.

Among the figure: 1, sleeve pipe; 2, casing coupling; 3, locking ball; 4, the steel ball body of packing into; 5, steel ball work sliding bush; 6, back-moving spring; 7, restriction choke mouth; 8, coiled tubing connector; 9, oil pipe or coiled tubing; 10, the first short sleeve box cupling; 11, go into well tool depth localization body; 12, the second short sleeve box cupling.

The specific embodiment

As shown in Figure 1, depth positioner of well-entry tool, it compriseslocking ball 3, steel ball pack intobody 4, steel ballwork sliding bush 5, back-movingspring 6, restriction choke mouth 7 and coiled tubing connector 8, coiled tubing connector 8 connects thesteel balls body 4 of packing into, thesteel ball body 4 of packing into is hollow bodies, its interlude internal diameter and external diameter are big, and external diameter cooperates with sleeve pipe 1 internal diameter, and internal diameter cooperates with the raised section of steel ballwork sliding bush 5; Steel ballwork sliding bush 5 two ends and the steel ball little section ofbody 4 two ends internal diameters of packing into cooperates, makes steel ballwork sliding bush 5 mobile in steel ball is packedbody 4 into; Steel ball is packed into, and there are all circular holes the big middle parts of external diameter in thebody 4,locking ball 3 is arranged in the circular hole, the external diameter oflocking ball 3 is greater than described circular hole external diameter, make 3 some revealments of locking ball outside steel ball is packedbody 4 circular holes into, return spring holder is arranged at steel ballwork sliding bush 5 bottoms, and back-movingspring 6 is put into the back-moving spring pedestal by the base plate back cover; There is restriction choke mouth 7 centre of steel ballwork sliding bush 5, and 7 places form certain chock pressure difference at the restriction choke mouth, makes steel ballwork sliding bush 5 that certain downward thrust be arranged, and thrust is opposite with the screen resilience of back-movingspring 6 downwards.

During work, utilize the length data of coiled tubing or oil pipe ground record, to go into well tool depth localization body 11 and be lowered into the first short sleeve box cupling, 10 places, being circulated to sleeve pipe 1 internal return with the discharge capacity of 100-300l/min in oil pipe or coiled tubing 9 goes out, form certain chock pressure difference at restriction choke mouth 7 places of going into well tool depth localization body 11, make steel ballwork sliding bush 5 that certain downward thrust be arranged.Adopt the liquid of direct circulation on one side, the mode of up and down oil pipe in one side or coiled tubing 9, when oil pipe or coiled tubing 9 are lowered near the short sleeve box cupling, for accurate location, it is the link slot oflocking ball 3 thatcasing coupling 2 is used as, at the first short sleeve box cupling, 10 places in several meters the scope, well tool depth localization body 11 is gone in activity, when going into well tool depth localization body 11 when running into the first short sleeve box cupling 10,locking ball 3 can enter the first short sleeve box cupling 10 and the second short sleeve box cupling, 12 joints, can occur as the connected effect of hydraulic fluid pipeline snap joint, at this moment, the weight of oil pipe or coiled tubing 9 can descend and maybe tubing string can be supported in the well not fall.Illustrate and found the first short sleeve box cupling 10.Stop the circulation of liquid in the oil pipe, steel ballwork sliding bush 5 moves up under the effect of back-movingspring 6, and lockingball 3 moves in steel ball is packedbody 4 into, makes into the well tool positioning body 11 and the first short sleeve box cupling 10 to throw off, and at this moment, tubing string can move up and down in well.Adopt above identical mode, seek the second short sleeve box cupling 12.When the length of two short sleeve box cuplings equaled the short sleeve length of short sleeve box cupling, at this moment, the depth location of other instrument in well that is connected on the oil pipe was exactly its real degree of depth.When the distance between two box cuplings during greater than the length of location short sleeve, then short sleeve is not found in explanation, can on carry or transfer tubing string the degree of depth be that the length of a sleeve pipe continues to seek.Till finding the second short sleeve box cupling 12.

Claims (2)

1. the localization method of depth positioner of well-entry tool the steps include:

1) utilizes the length data of coiled tubing or oil pipe ground record, will go into well tool depth localization body (11) and be lowered into the first short sleeve box cupling (10) and locate;

2) being circulated to sleeve pipe (1) internal return with the discharge capacity of 100-300l/min in oil pipe or coiled tubing (9) goes out, locate to form certain chock pressure difference at the restriction choke mouth (7) of going into well tool depth localization body (11), make steel ball work sliding bush (5) that certain downward thrust be arranged;

3) adopt the liquid of direct circulation on one side, the mode of up and down coiled tubing in one side or coiled tubing (9), in the first short sleeve box cupling (10) is located several meters scope, well tool depth localization body (11) is gone in activity, when going into well tool depth localization body (11) when running into the first short sleeve box cupling (10), locking ball (3) can enter the first short sleeve box cupling (10) and second short sleeve box cupling (12) joint;

4) stop the circulation of liquid in the oil pipe, steel ball work sliding bush (5) moves up under the effect of back-moving spring (6), locking ball (3) moves in steel ball is packed body (4) into, makes into the well tool positioning body (11) and the first short sleeve box cupling (10) to throw off;

5) at this moment, tubing string can move up and down in well, adopts above identical mode, seeks the second short sleeve box cupling (12);

6) when the length of two short sleeve box cuplings equals the short sleeve length of short sleeve box cupling, at this moment, the depth location of other instrument in well that is connected on the oil pipe is exactly its real degree of depth;

7) when the distance between two box cuplings during greater than the length of location short sleeve, then short sleeve is not found in explanation, returns for the 3rd step and continue to seek.

2. according to the depth positioner of well-entry tool of localization method design, it is characterized in that: it comprises locking ball (3), steel ball pack into body (4), steel ball work sliding bush (5), back-moving spring (6), restriction choke mouth (7) and coiled tubing connector (8), coiled tubing connector (8) connects the steel ball body (4) of packing into, the steel ball body (4) of packing into is the hollow body, its interlude internal diameter and external diameter are big, external diameter cooperates with sleeve pipe 1 internal diameter, and internal diameter cooperates with the raised section of steel ball work sliding bush (5); Steel ball work sliding bush (5) two ends and the steel ball little section of body (4) two ends internal diameter of packing into cooperates, makes steel ball work sliding bush (5) mobile in steel ball is packed body (4) into; There are all circular holes the steel ball big middle part of the interior external diameter of body (4) of packing into, locking ball (3) is arranged in the circular hole, the external diameter of locking ball (3) is greater than described circular hole external diameter, only some is betrayed outside steel ball is packed body (4) circular hole into to make locking ball (3), return spring holder is arranged at steel ball work sliding bush (5) bottom, and back-moving spring (6) is put into the back-moving spring pedestal by the base plate back cover; There is restriction choke mouth (7) centre of steel ball work sliding bush (5), locates to form certain chock pressure difference at restriction choke mouth (7), makes steel ball work sliding bush (5) that certain downward thrust be arranged, and thrust is opposite with the screen resilience of back-moving spring (6) downwards.

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