CN110067531B - Bridge plug with stable anchoring device - Google Patents

Abstract

The invention relates to the technical field of oilfield exploitation equipment, and discloses a bridge plug with a stable anchoring device, which comprises an inner supporting device, wherein a control device is movably sleeved on the inner wall of the inner supporting device, an upper limiting cylinder is fixedly sleeved outside the inner supporting device, a shearing ring is movably sleeved outside the upper limiting cylinder, the bottom of the shearing ring is contacted with an upper slip, an upper sleeve is clamped inside the upper slip, the bottom of the upper sleeve is fixedly connected with a sealing rubber cylinder, and the bottom of the sealing rubber cylinder is fixedly connected with a lower sleeve. This bridge plug with stable anchoring device makes the lower casing pipe advance a distance and will make support fixture block and engagement groove joint a tooth through supporting the mutually supporting of fixture block and engagement groove, has effectually improved the stability between upper casing pipe and the slips down like this to the utilization can be guaranteed that the slip piece does not take place to break away from with the slips connecting plate at the in-process that removes.

Description

Bridge plug with stable anchoring device

Technical Field

The invention relates to the technical field of oilfield exploitation equipment, in particular to a bridge plug with a stable anchoring device.

Background

The bridge plug is used for sealing an oil and gas well, has the characteristics of less construction procedures, short period and accurate sealing position, is conveyed to a preset position of a shaft by a cable or a pipe column, pressure generated by gunpowder blasting, hydraulic setting or mechanical setting tools acts on an upper slip, tension acts on a tension rod, the upper slip and the lower slip exert upper pressing and lower pulling forces on a sealing rubber cylinder through an upper cone and a lower cone, when the tension reaches a certain value, the tension rod is broken, a setting tool is separated from the bridge plug, a locking device on a central pipe of the bridge plug plays a role at the moment, the upper slip and the lower slip are broken and embedded on the inner wall of a casing, the rubber cylinder expands and seals, and setting is completed.

The following problems easily occur when the existing bridge plug works:

1. the effect of bridging plug shutoff after setting is unstable, is connected unstablely between slips and the sleeve pipe to make slips and oil pipe inner wall break away from, can not play fine anchoring effect, lost the normal shutoff effect of bridging plug.

2. When the sleeve extrudes the sealing rubber tube, the sealing rubber tube cannot be regularly deformed, so that the outer surface of the sealing rubber tube cannot be tightly attached to the inner wall of the oil pipe, and the bridge plug cannot be plugged in place.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention provides a bridge plug with a stable anchoring device that solves the problems set forth in the background above.

The invention provides the following technical scheme: the utility model provides a bridging plug with stable anchoring device, includes inner support device, inner support device's inner wall activity has cup jointed controlling means, inner support device's outside fixed cover has cup jointed spacing section of thick bamboo, the outside activity of going up spacing section of thick bamboo has cup jointed the shear ring, the bottom contact of shear ring has last slips, the inside joint of going up the slips has the upper casing, go up sheathed tube bottom fixedly connected with sealing rubber tube, sealing rubber tube's bottom fixedly connected with lower casing, the outside joint of lower casing bottom has slips down, the bottom contact of slips has down spacing section of thick bamboo down, spacing section of thick bamboo cup joints with inner support device is fixed down.

Preferably, the inner support device comprises a mandrel, semicircular grooves are formed in the top and the bottom of the mandrel, an arc-shaped protruding block is arranged in the middle of the outer portion of the mandrel, limiting blocking strips located on the upper side and the lower side of the arc-shaped protruding block are arranged on the outer portion of the mandrel, and an upper sleeve and a lower sleeve are clamped on the outer portions of the limiting blocking strips;

preferably, the control device comprises a plug, the plug is movably sleeved inside the mandrel, four mutually symmetrical limiting rods are movably sleeved on the side surfaces of the plug, and springs are movably sleeved outside the four limiting rods;

preferably, the lower casing comprises a casing body, a supporting plate is arranged outside the casing body, six mutually symmetrical slip connecting plates are fixedly connected to the top of the casing body, supporting clamping blocks are arranged on the outer surfaces of the six slip connecting plates, and side baffles are arranged on two sides of the six slip connecting plates;

preferably, the inner wall of the sleeve body is provided with six mutually symmetrical rectangular grooves, and limiting barrier strips are clamped inside the six rectangular grooves;

preferably, the lower slip comprises an installation block, six slip blocks which are symmetrical to each other are fixedly installed at the top of the installation block, the outer walls of the six slip blocks are provided with meshing teeth, the inner walls of the six slip blocks are provided with meshing grooves, and the meshing grooves are clamped with the supporting clamping blocks;

preferably, the inner cavity of the mandrel at one side close to the control device is hexagonal;

preferably, the side of the occlusion tooth is provided with a chamfer angle, and the top of the inclined plane is provided with a plurality of uniformly distributed sawteeth.

The invention has the following beneficial effects:

1. this bridge plug with stable anchoring device makes the lower casing pipe advance a distance and will make support fixture block and engagement groove joint a tooth through supporting the mutually supporting of fixture block and engagement groove, has effectually improved the stability between upper casing pipe and the slips down like this to the utilization can be guaranteed that the slip piece does not take place to break away from with the slips connecting plate at the in-process that removes.

2. This bridge plug with stable anchoring device, through the interior strutting arrangement and last sleeve pipe, mutually support of sealed packing element to only can translate between making last sleeve pipe and the interior strutting arrangement, and can not take place to rotate, be favorable to keeping sheathed tube stability, and when going up sleeve pipe and lower casing and to sealed packing element extrusion, sealed packing element can produce deformation along the circular arc bulge, stability when having guaranteed sealed packing element deformation, has improved the shutoff effect of device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the interior of the structure of the present invention;

FIG. 3 is a schematic view of the construction of the inner support means of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 2;

FIG. 5 is a schematic view of the structure of the lower casing of the present invention;

FIG. 6 is a schematic view of the construction of the lower slip of the present invention.

In the figure: 1. an inner support means; 101. a mandrel; 102. a circular arc convex block; 103. a limiting barrier strip; 2. a control device; 201. a plug; 202. a limiting rod; 203. a spring; 3. an upper limiting cylinder; 4. a shear ring; 5. the slips are put on; 6. sleeving a sleeve; 7. sealing the rubber cylinder; 8. setting a sleeve; 801. a sleeve body; 802. a support plate; 803. a slip connecting plate; 804. supporting the clamping block; 805. a side dam; 9. a slip is put down; 901. mounting blocks; 902. a slip block; 903. engaging teeth; 904. an engagement groove; 10. a lower limiting cylinder.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-6, a bridge plug with a stable anchoring device comprises an inner supportingdevice 1, acontrol device 2 is movably sleeved on the inner wall of the inner supportingdevice 1, an upper limitingcylinder 3 is fixedly sleeved outside the inner supportingdevice 1, ashearing ring 4 is movably sleeved outside the upper limitingcylinder 3, anupper slip 5 is in contact with the bottom of theshearing ring 4, anupper sleeve 6 is clamped inside theupper slip 5, a sealingrubber cylinder 7 is fixedly connected to the bottom of theupper sleeve 6, alower sleeve 8 is fixedly connected to the bottom of the sealingrubber cylinder 7, alower slip 9 is clamped outside the bottom of thelower sleeve 8, a lower limitingcylinder 10 is in contact with the bottom of thelower slip 9, and the lower limitingcylinder 10 is fixedly sleeved with the inner supportingdevice 1.

Theinner support device 1 comprises amandrel 101, semicircular grooves are formed in the top and the bottom of themandrel 101, an arc-shaped protruding block 102 is arranged in the middle of the outer portion of themandrel 101, limitingblocking strips 103 which are located on the upper side and the lower side of the arc-shaped protruding block 102 are arranged on the outer portion of themandrel 101, and anupper sleeve 6 and alower sleeve 8 are clamped on the outer portions of the limitingblocking strips 103;

thecontrol device 2 comprises aplug 201, theplug 201 is movably sleeved inside themandrel 101, four mutually symmetrical limitingrods 202 are movably sleeved on the side surface of theplug 201,springs 203 are movably sleeved outside the fourlimiting rods 202, and thesprings 203 can limit the position of theplug 201 and reset theplug 201;

thelower casing 8 comprises acasing body 801, asupport plate 802 is arranged outside thecasing body 801, sixslip connecting plates 803 which are symmetrical to each other are fixedly connected to the top of thecasing body 801,support clamping blocks 804 are arranged on the outer surfaces of the sixslip connecting plates 803, andside baffles 805 are arranged on two sides of the sixslip connecting plates 803;

six mutually symmetrical rectangular grooves are formed in the inner wall of thesleeve body 801, and limiting barrier strips 103 are clamped in the six rectangular grooves to prevent thelower sleeve 8 and theinner support device 1 from rotating relatively;

thelower slip 9 comprises aninstallation block 901, sixslip blocks 902 which are symmetrical to each other are fixedly installed at the top of theinstallation block 901, meshingteeth 903 are arranged on the outer walls of the sixslip blocks 902, meshinggrooves 904 are arranged on the inner walls of the sixslip blocks 902, and the meshinggrooves 904 are clamped with the supporting slip blocks 804;

the inner cavity of themandrel 101, which is close to one side of thecontrol device 2, is hexagonal, when the device needs to be taken out, theinner support device 1 and thelower sleeve 8 are rotated by an inner hexagonal wrench, so that theupper slip 5 and theupper sleeve 6 as well as thelower sleeve 8 and thelower slip 9 are relatively displaced, and at the moment, the engaging teeth of theupper slip 5 and theupper sleeve 6 as well as the engaging teeth of thelower sleeve 8 and thelower slip 9 are disengaged, so that the engagingteeth 903 are disengaged from the inner wall of the oil pipe, the device is convenient to take out, drilling is not needed, and the inner part of the oil pipe is prevented from being blocked;

wherein, the side ofinterlock tooth 903 is provided with the chamfer angle, and a plurality of evenly distributed's sawtooth is seted up at the top on inclined plane, is convenient for more stable with being connected of oil pipe inner wall for the shutoff effect of device is better.

The working principle is that after the device is put down to a designated position, the lower casing 8 is pushed towards the lower slip 9 by using a setting tool, each time the lower casing 8 advances for a certain distance, the supporting fixture block 804 and the meshing groove 904 are clamped with a tooth, so that the stability between the upper casing 6 and the lower slip 9 is effectively improved, the slip block 902 can be ensured not to be separated from the slip connecting plate 803 by using the seat 905 in the moving process, when the meshing groove 904 is contacted with the supporting plate 802, the lower casing 8 is conveniently pushed towards the sealing rubber cylinder 7 and is not easy to slip, so that the sealing rubber cylinder 7 can be better blocked, and when the upper casing 6 and the lower casing 8 extrude the sealing rubber cylinder 7, the sealing rubber cylinder 7 can deform along the arc bulge block 102, the stability of the sealing rubber cylinder 7 in deformation is ensured, when the device is taken out, an inner hexagon wrench is firstly inserted into the inner supporting device 1 by using the device, then rotate interior strutting arrangement 1 and go up sleeve 6, lower casing 8 for slip connecting plate 803 staggers with slip piece 902 position, and slip piece 902 enters into the through-hole of slip connecting plate 803 side this moment, thereby makes interlock tooth 903 and oil pipe inner wall break away from, is convenient for take out the device, need not bore except that, avoids blockking up oil pipe inside.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A bridge plug with stabilized anchoring means comprising an inner support means (1), characterized in that: the inner wall of the inner supporting device (1) is movably sleeved with a control device (2), an upper limiting cylinder (3) is fixedly sleeved on the outer portion of the inner supporting device (1), a shearing ring (4) is movably sleeved on the outer portion of the upper limiting cylinder (3), an upper slip (5) is contacted with the bottom of the shearing ring (4), an upper sleeve (6) is clamped in the upper slip (5), a sealing rubber cylinder (7) is fixedly connected to the bottom of the upper sleeve (6), a lower sleeve (8) is fixedly connected to the bottom of the sealing rubber cylinder (7), a lower slip (9) is clamped on the outer portion of the bottom of the lower sleeve (8), a lower limiting cylinder (10) is contacted with the bottom of the lower slip (9), and the lower limiting cylinder (10) is fixedly sleeved with the inner supporting device (1);

the lower casing (8) comprises a casing body (801), a supporting plate (802) is arranged outside the casing body (801), six slip connecting plates (803) which are symmetrical to each other are fixedly connected to the top of the casing body (801), supporting clamping blocks (804) are arranged on the outer surfaces of the six slip connecting plates (803), and side baffles (805) are arranged on two sides of each of the six slip connecting plates (803);

the lower slip (9) comprises an installation block (901), six slip blocks (902) which are symmetrical to each other are fixedly installed at the top of the installation block (901), meshing teeth (903) are arranged on the outer walls of the six slip blocks (902), meshing grooves (904) are formed in the inner walls of the six slip blocks (902), and the meshing grooves (904) are clamped with the supporting slip blocks (804).

2. A bridge plug with stabilized anchoring means according to claim 1, wherein: the inner supporting device (1) comprises a mandrel (101), semicircular grooves are formed in the top and the bottom of the mandrel (101), an arc protruding block (102) is arranged in the middle of the outer portion of the mandrel (101), limiting blocking strips (103) located on the upper side and the lower side of the arc protruding block (102) are arranged on the outer portion of the mandrel (101), and an upper sleeve (6) and a lower sleeve (8) are clamped on the outer portion of the limiting blocking strips (103).

3. A bridge plug with stabilized anchoring means according to claim 2, wherein: the control device (2) comprises a plug (201), wherein the plug (201) is movably sleeved inside the mandrel (101), four limiting rods (202) which are symmetrical to each other are movably sleeved on the side surface of the plug (201), and springs (203) are movably sleeved outside the limiting rods (202).

4. A bridge plug with stabilized anchoring means according to claim 2, wherein: six mutual symmetrical rectangular channels are formed in the inner wall of the sleeve body (801), and limiting stop strips (103) are clamped in the six rectangular channels.

5. A bridge plug with stabilized anchoring means according to claim 1, wherein: the side of the occlusion tooth (903) is provided with a chamfer angle, and the top of the inclined plane is provided with a plurality of uniformly distributed sawteeth.

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