CN213597923U - Drilling-integrated cement squeezing bridge plug - Google Patents
Drilling-integrated cement squeezing bridge plug Download PDFInfo
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- CN213597923U CN213597923U CN202022501902.7U CN202022501902U CN213597923U CN 213597923 U CN213597923 U CN 213597923U CN 202022501902 U CN202022501902 U CN 202022501902U CN 213597923 U CN213597923 U CN 213597923U
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Abstract
The utility model relates to a drilling tool field, concretely relates to a brill integrative formula cement squeezing bridge plug of formula that drills. Comprises a releasing seat sealing mechanism, a cement extruding and injecting mechanism and a bearing and retaining mechanism. The drillable bridge plug with the releasing function is used as a main plugging tool, ground equipment such as a pump tank car, a cement discharging car and the like is used for setting the bridge plug and performing cementing operation, the drilling tool is used for plugging operation such as cement squeezing at the lower layer of the tool, bottom water plugging and the like, and the integration of one-time pipe column setting, cement squeezing operation and releasing is realized. And the cement is not salvaged after being squeezed, so that the construction steps are reduced, the operation cost and the construction risk are reduced, and the working efficiency is improved.
Description
Technical Field
The utility model relates to a drilling tool field, concretely relates to a brill integrative formula cement squeezing bridge plug of formula that drills.
Background
In the construction processes of oil testing, oil-gas layer transformation, stratum testing, injection-production layer position adjustment and the like in the oil field development process, a cement squeezing bridge plug (retainer) is required to be used for temporarily plugging or permanently plugging an oil, gas and water layer or secondarily cementing a casing outer channeling groove.
The existing cement squeezing bridge plug technology mainly comprises the following steps: bridge plug, bridge plug seat seal instrument, crowded notes tubular column and fishing tool, during the operation, crowded cement bridge plug and bridge plug seat seal instrument are gone into earlier to the first tubular column, and the pressure makes crowded cement bridge plug seat seal in the casing wall, and the crowded notes tubular column of going into carries out crowded cement operation under the tubular column of second, and the crowded cement bridge plug is retrieved to fishing tool under the tubular column of third.
Therefore, the prior art has the following technical problems:
after the setting is finished, a squeezing pipe column needs to be put into the cement squeezing bridge plug for squeezing operation, the construction process is complex, the reliability is poor, squeezing failure is easily caused, the construction period is long, and the operation cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a construction process is simple, and the reliability is high, is difficult to lead to crowded notes failure, and construction cycle is short, and a integrative formula crowded cement bridging plug that can bore of a line that the running cost is low.
In order to realize the purpose, the utility model provides a technical scheme is:
a drilling-integrated cement squeezing bridge plug comprises a releasing seat sealing mechanism, a cement squeezing mechanism and a retaining mechanism, wherein the releasing seat sealing mechanism comprises an upper joint, the upper joint is arranged in a step at the upper end of an outer barrel, a pressing cap is connected to the upper joint above the outer barrel in a threaded manner and tightly abuts against the upper end of the outer barrel, the lower end of the upper joint is connected with an inner piston barrel in a threaded manner, an upper piston is connected to the lower part of the upper joint in the outer barrel in a sliding and sealing manner, a lower piston is connected to the inner piston barrel in a sliding and sealing manner, the upper end of the lower piston is inserted into the lower end of the upper piston, the upper piston is connected with the lower piston through a seat seal shear pin, only a plurality of locking blocks are arranged on the lower piston in the upper piston in a penetrating manner, one end, far away from the inner piston barrel, of each locking block is contacted with the upper piston, one end, a taper hole corresponding to the locking block is arranged on the inner piston cylinder, one tapered end of the locking block is positioned in the taper hole, the lower end of the down piston is connected with a connecting cap in a threaded manner, the lower end of the inner piston cylinder is connected with a release joint in a threaded manner,
the cement squeezing mechanism comprises a ball seat, the ball seat is arranged in the lower end of the release joint, the ball seat is fixedly connected with the lower end of the release joint through a cement injecting shear pin, the ball seat is hermetically connected with the lower end of the release joint,
the bearing mechanism comprises a central pipe, a locking ring groove is arranged on the outer wall of the upper end of the central pipe, a locking ring is arranged in the locking ring groove, a plurality of radial threaded holes are uniformly distributed at the upper end of the central tube, releasing shear pins are arranged in the radial threaded holes, a sealing lock sleeve is fixed in the lower end of the central tube, the lower end of the central tube is provided with a radial hole, the central tube parts at the upper side and the lower side of the radial hole are hermetically connected with a sealing lock sleeve, the sealing lock sleeve is provided with an overflowing hole which is communicated with the radial hole, a groove is arranged on the inner wall of the middle part of the central tube, the lower end of the central tube is connected with a plug through a thread, the outer wall of the central tube is provided with a circular bead, a rubber cylinder pressing cap, a rubber cylinder group, an upper cone, a slip and a lower cone are sequentially arranged on the central tube from bottom to top, the lower cone is in threaded connection with the central pipe, the upper end of the rubber cylinder pressing cap is in threaded connection with the connecting cap, and the releasing shear pin tightly abuts against the inner edge of the rubber cylinder pressing cap.
Specifically, the pressing cap and the upper joint are fixedly connected through a set screw.
Specifically, the slips are bidirectional slips, and the slips are evenly machined with slots in the axial direction.
Specifically, packing element group is provided with well packing element including two end packing elements that set up from top to bottom between the packing element of both ends, is provided with the spacer ring between end packing element and the well packing element.
Specifically, the sealing lock sleeve is fixedly connected with the central pipe through an anti-rotation shear pin.
Compared with the prior art, the beneficial effects of the utility model are that:
the drillable bridge plug with the releasing function is used as a main plugging tool, ground equipment such as a pump tank car, a cement discharging car and the like is used for setting the bridge plug and performing cementing operation, the drilling tool is used for plugging operation such as cement squeezing at the lower layer of the tool, bottom water plugging and the like, and the integration of one-time pipe column setting, cement squeezing operation and releasing is realized. And the cement is not salvaged after being squeezed, so that the construction steps are reduced, the operation cost and the construction risk are reduced, and the working efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of the area a in fig. 1.
Fig. 3 is an enlarged view of the region B in fig. 1.
Detailed Description
As shown in figures 1-3, the one-trip drillable cement squeezing bridge plug comprises a releasing seat sealing mechanism, a cement squeezing mechanism and a retaining mechanism.
The releasing seat sealing mechanism comprises an upper joint 1, the upper joint 1 is installed in a step at the upper end of an outer barrel 4, a pressing cap 2 is connected to the upper joint 1 above the outer barrel 4 in a threaded mode, the pressing cap 2 tightly abuts against the upper end of the outer barrel 4, and the pressing cap 2 is fixedly connected with the upper joint 1 through a set screw 3. The lower end of the upper joint 1 is in threaded connection with an inner piston cylinder 12, the lower portion of the upper joint 1 in the outer cylinder 4 is in sliding sealing connection with an uplink piston 7, the inner piston cylinder 12 is in sliding sealing connection with a downlink piston 11, the uplink piston 7 and the downlink piston 11 are in sliding sealing contact with the inner edge of the outer cylinder 4, the upper end of the downlink piston 11 is inserted into the lower end of the uplink piston 7, the uplink piston 7 is connected with the downlink piston 11 through a setting shear pin 8, only a plurality of locking blocks 24 penetrate through the downlink piston 11 in the uplink piston 7, one end, away from the inner piston cylinder 12, of each locking block 24 is in contact with the uplink piston 7, one end, facing the inner piston cylinder 12, of each locking block 24 is conical, a conical hole 28 corresponding to each locking block 24 is formed in the inner piston cylinder 12, one conical end of each locking block 24 is located in the corresponding conical hole 28, the lower end of the downlink piston 11.
The cement squeezing mechanism comprises a ball seat 32, the ball seat 32 is installed in the lower end of the release joint 13, the ball seat 32 is fixedly connected with the lower end of the release joint 13 through a cement injecting shear pin 29, and the ball seat 32 is hermetically connected with the lower end of the release joint 13.
The bearing and retaining mechanism comprises a central tube 19, wherein an annular locking groove is formed in the outer wall of the upper end of the central tube 19, a locking ring 15 is installed in the annular locking groove, a plurality of radial threaded holes are uniformly distributed in the upper end of the central tube 19, a releasing shear pin 14 is installed in each radial threaded hole, a sealing locking sleeve 34 is fixed in the lower end of the central tube 19, the sealing locking sleeve 34 is fixedly connected with the central tube 19 through an anti-rotating shear pin 30, a radial hole 6 is formed in the lower end of the central tube 19, the central tube 19 on the upper side and the lower side of the radial hole 6 is in sealing connection with the sealing locking sleeve 34, a overflowing hole 9 is formed in the sealing locking sleeve 34, the overflowing hole 9 is communicated with the radial hole 6, a groove 5 is formed in the inner wall of the middle of the central tube 19, a plug 23 is in threaded connection with the lower end of the central tube 19, a shoulder is arranged on the outer wall, the packing element group includes two end packing elements 17 that set up from top to bottom, is provided with well packing element 18 between the packing element 17 of both ends, is provided with spacer ring 26 between end packing element 17 and the well packing element 18. The slip 21 is a bidirectional slip, slots are uniformly machined in the axial direction of the slip 21, the lower cone 22 is in threaded connection with the central pipe 19, the upper end of the rubber cylinder pressing cap 16 is in threaded connection with the connecting cap 10, and the releasing shear pin 14 tightly abuts against the inner edge of the rubber cylinder pressing cap 16.
During construction, the tool is lowered to a designed position according to design requirements, ground equipment such as a pump tanker and a cement discharging truck is utilized to connect a well mouth, clean water passes through a central channel of the piston inner cylinder 12, the release joint 13 and the ball seat 32 and enters an oil sleeve annulus through the overflowing hole 9 and the radial hole 6 of the sealing sleeve 34 and the central pipe 19.
When cementing, the drillable ball 31 is thrown in, the drillable ball 31 enters the ball seat 32 and is sealed with the ball seat, the pressure of the lower exploring pipe column 5t is kept still, and the lower layer of cement squeezing operation is completed. The method comprises the steps that firstly, small-displacement pressing is conducted, after the designed setting pressure is achieved, a setting shear pin 8 is sheared, an ascending piston 7 ascends, when an upper piston 7 loses radial blocking to a locking block 24, the locking block 24 is unlocked, a descending piston 11 is pushed to descend hydraulically, the descending piston 11 sequentially pushes a connecting cap 10, a rubber cylinder pressing cap 16, an end rubber cylinder 17, a spacer ring 26, a middle rubber cylinder 18, an upper cone 20 and a slip 21 in the axial direction, the locking ring 15 and the rubber cylinder pressing cap 16 are locked step by step, multi-stage gradual pressing is conducted in an oil pipe, the pressure of each pressing stage is stabilized for 3-5 minutes, the slip 21 is made to open and bite the sleeve, the end rubber cylinder 17 and the middle rubber cylinder 18 are pressed, then the oil sleeve annulus is sealed, and setting is achieved.
And (3) continuing pressurizing, cutting the releasing shear pin 14 after the pressure reaches a certain value, continuously pressurizing until the pressure is suddenly released, indicating that the cementing shear pin 29 is cut, descending the drillable ball 31 and the ball seat 32 to the position of the plug 23, communicating the sealing lock sleeve 34 with the overflowing hole 9 and the radial hole 6 of the central pipe 19 and the central channel of the tool, continuing injecting water, preventing the casing from returning liquid, descending the tubular column 5t, normally reducing the hanging weight of the tubular column, and proving that the tool seat sealing is finished. When the tool starts to press and seal the seat, the pipe column can not be lifted, the lower layer cement squeezing valve arranged in the tool can be closed when the pipe column is lifted, and the pressure of the lower exploring pipe column 5t is kept constant in the whole process until the lower layer cement squeezing operation is finished;
and after the tool seat sealing is finished, injecting water, measuring the stratum absorption capacity, and determining the ash extrusion specific gravity and the ash extrusion amount.
And (3) lower-layer cement squeezing operation: connecting the cement squeezing pipeline, and performing clear water trial squeezing, if the sleeve does not return water, performing lower-layer cement squeezing operation.
And (3) upper layer cement squeezing operation: after the tool seat seal or the lower layer cement squeezing operation is carried out according to the flow, the pipe column is lifted slowly, the upper joint 1, the piston inner cylinder 12 and the release joint 13 drive the sealing lock sleeve 34 to cut off the anti-rotation shear pin 30 and then move upwards to the position of the groove 5 on the inner wall of the middle part of the central pipe 19, the groove 5 is limited and locks the sealing lock sleeve 34 to move axially, at the moment, the radial holes of the sealing lock sleeve 34 and the central pipe 19 are closed, cement is injected into the lower layer in a sealing mode, the pipe column is continuously lifted slowly to the position required by the design (at least more than 1.5m meters higher than the tool, the lifting height is increased considering the elongation of the pipe column), and.
After the cementing operation is completed, the pipe column is lifted up by more than 2m meters according to the design requirement, the lifting height is increased by considering the elongation of the pipe column, the well is back-washed by large discharge, the cement is not contained in the back-flowing liquid, the releasing seat sealing mechanism is lifted up along with the pipe column, the retaining mechanism is retained underground, and the cementing operation is completed after the cement is solidified.
After the drilling type cement squeezing bridge plug is used, fishing is not performed any more, drilling can be directly and quickly performed, and integration of setting of a pipe column, cement squeezing operation and releasing is achieved. And the cement is not salvaged after being squeezed, so that the construction steps are reduced, the operation cost and the construction risk are reduced, and the working efficiency is improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A drilling-integrated cement squeezing bridge plug comprises a releasing seat sealing mechanism, a cement squeezing mechanism and a retaining mechanism, and is characterized in that the releasing seat sealing mechanism comprises an upper joint, the upper joint is arranged in a step at the upper end of an outer cylinder, a pressing cap is connected to the upper joint above the outer cylinder in a threaded manner and tightly abuts against the upper end of the outer cylinder, the lower end of the upper joint is connected with an inner piston cylinder in a threaded manner, the lower part of the upper joint in the outer cylinder is connected with an uplink piston in a sliding and sealing manner, the inner piston cylinder is connected with a downlink piston in a sliding and sealing manner, the uplink piston and the downlink piston are in sliding and sealing contact with the inner edge of the outer cylinder, the upper end of the downlink piston is inserted into the lower end of the uplink piston, the uplink piston is connected with the downlink piston through a seat sealing shear pin, only a plurality of locking blocks are arranged on the downlink piston in the uplink piston in a penetrating manner, one end, a taper hole corresponding to the locking block is arranged on the inner piston cylinder, one tapered end of the locking block is positioned in the taper hole, the lower end of the down piston is connected with a connecting cap in a threaded manner, the lower end of the inner piston cylinder is connected with a release joint in a threaded manner,
the cement squeezing mechanism comprises a ball seat, the ball seat is arranged in the lower end of the release joint, the ball seat is fixedly connected with the lower end of the release joint through a cement injecting shear pin, the ball seat is hermetically connected with the lower end of the release joint,
the bearing mechanism comprises a central pipe, a locking ring groove is arranged on the outer wall of the upper end of the central pipe, a locking ring is arranged in the locking ring groove, a plurality of radial threaded holes are uniformly distributed at the upper end of the central tube, releasing shear pins are arranged in the radial threaded holes, a sealing lock sleeve is fixed in the lower end of the central tube, the lower end of the central tube is provided with a radial hole, the central tube parts at the upper side and the lower side of the radial hole are hermetically connected with a sealing lock sleeve, the sealing lock sleeve is provided with an overflowing hole which is communicated with the radial hole, a groove is arranged on the inner wall of the middle part of the central tube, the lower end of the central tube is connected with a plug through a thread, the outer wall of the central tube is provided with a circular bead, a rubber cylinder pressing cap, a rubber cylinder group, an upper cone, a slip and a lower cone are sequentially arranged on the central tube from bottom to top, the lower cone is in threaded connection with the central pipe, the upper end of the rubber cylinder pressing cap is in threaded connection with the connecting cap, and the releasing shear pin tightly abuts against the inner edge of the rubber cylinder pressing cap.
2. The single-drill integrated drillable squeeze concrete bridge plug of claim 1, wherein the pressing cap and the upper joint are fixedly connected through a set screw.
3. The single-drill integrated drillable cement squeezing bridge plug as claimed in claim 1, wherein the slips are bidirectional slips, and the slips are axially and uniformly provided with slots.
4. The one-drill-one-body drillable cement squeezing bridge plug is characterized in that the rubber cylinder group comprises two end rubber cylinders which are arranged up and down, a middle rubber cylinder is arranged between the two end rubber cylinders, and a spacer ring is arranged between the end rubber cylinder and the middle rubber cylinder.
5. The single-drill integrated drillable cement squeezing bridge plug of claim 1, wherein the sealing lock sleeve is fixedly connected with the central pipe through an anti-rotation shear pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022501902.7U CN213597923U (en) | 2020-11-03 | 2020-11-03 | Drilling-integrated cement squeezing bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022501902.7U CN213597923U (en) | 2020-11-03 | 2020-11-03 | Drilling-integrated cement squeezing bridge plug |
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| Publication Number | Publication Date |
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| CN213597923U true CN213597923U (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022501902.7U Active CN213597923U (en) | 2020-11-03 | 2020-11-03 | Drilling-integrated cement squeezing bridge plug |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898314A (en) * | 2021-10-18 | 2022-01-07 | 中国石油化工股份有限公司 | Quick drilling type sitting and squeezing integrated temporary plugging device |
| CN114893151A (en) * | 2022-04-29 | 2022-08-12 | 中石化石油工程技术服务有限公司 | Hydraulic setting and cement injecting integrated tool for bridge plug |
-
2020
- 2020-11-03 CN CN202022501902.7U patent/CN213597923U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898314A (en) * | 2021-10-18 | 2022-01-07 | 中国石油化工股份有限公司 | Quick drilling type sitting and squeezing integrated temporary plugging device |
| CN114893151A (en) * | 2022-04-29 | 2022-08-12 | 中石化石油工程技术服务有限公司 | Hydraulic setting and cement injecting integrated tool for bridge plug |
| CN114893151B (en) * | 2022-04-29 | 2024-02-20 | 中石化石油工程技术服务有限公司 | Bridge plug hydraulic setting and ash injection integrated tool |
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