CN202055799U - Midway-setting prevention recyclable bridge plug for oilfield downhole operation - Google Patents
Midway-setting prevention recyclable bridge plug for oilfield downhole operation Download PDFInfo
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- CN202055799U CN202055799U CN2011201629741U CN201120162974U CN202055799U CN 202055799 U CN202055799 U CN 202055799U CN 2011201629741 U CN2011201629741 U CN 2011201629741U CN 201120162974 U CN201120162974 U CN 201120162974U CN 202055799 U CN202055799 U CN 202055799U
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- seat
- midway
- recyclable
- sealing mechanism
- downhole operation
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Abstract
The utility model relates to a midway-setting prevention recyclable bridge plug for oilfield downhole operation, which is used for pugging lower well sections in constructions of fracturing, acid treatment, formation testing, mining and water injection of separate layers of oil-water wells during exploration and development of oilfields. The bridge plug comprises a release joint, a central pipe, an unplugging mechanism, a sealing mechanism and a setting mechanism, wherein the unplugging mechanism, the sealing mechanism and the setting mechanism are assembled outside the central pipe sequentially, the release joint is connected to the upper portion of the central pipe, and a midway-setting prevention mechanism is connected to the lower portion of the central pipe and used for preventing midway setting of the bridge plug. The midway-setting prevention recyclable bridge plug for oilfield downhole operation is applicable to packing construction of various oil wells, water wells, high-angle deviated wells and horizontal wells widely, construction success rate of the recyclable bridge plug in a horizontal well can be increased, operation cost can be reduced, and service range of the recyclable bridge plug is expanded.
Description
Technical field
The utility model relates to the oil field in the exploration and development process, and the bridging plug, particularly oilfield downhole operation of shutoff lower well section seal recyclable bridging plug with anti-seat midway when oil-water well separate stratum fracfturing, separate layer acid treatment, formation testing by layer, separate zone production, seperated layer water injection construction.
Background technology
At present the bridging plug that uses of oil field has two kinds of drillable bridging plug and recoverable bridging plugs, these two kinds of bridging plugs are if be applied to horizontal well, because horizontal well is than big many of the frictional resistance of straight well when instrument is gone into the well, therefore in going into the well process, bridging plug very easily makes bridging plug seat envelope midway, bridging plug once midway a seat envelope the lighter need carry out fishing, weight person may need overhaul to handle, and construction brings tremendous loss to entire job.In order to address this problem, the production scene needs a kind of recyclable bridging plug of seat envelope midway of preventing, enlarges the scope of application of recyclable bridging plug, the construction success rate of the well of improving the standard.
Summary of the invention
Task of the present utility model provides oilfield downhole operation and seals recyclable bridging plug with anti-seat midway, overcome above-mentioned defective of the prior art, solve the midway seat envelope problem of recyclable bridging plug in work progress, the construction success rate of the well of improving the standard enlarges the scope of application of recyclable bridging plug.
The present technique solution can reach above-mentioned purpose: oilfield downhole operation with the recyclable bridging plug of the anti-envelope of seat midway comprise back-off sub, central tube, separate sealing mechanism, sealing mechanism and seat sealing mechanism, separate sealing mechanism, sealing mechanism and seat sealing mechanism and be assembled in the outside of central tube successively, back-off sub is connected with the top of central tube, connect the anti-sealing mechanism of seat midway in the bottom of central tube, prevent recyclable bridging plug seat envelope midway.
The utility model compared with prior art has following significant effect: 1, because the utility model has designed the anti-sealing mechanism of seat midway, thereby this mechanism locks the locking that realizes lower cone by locking cylinder sleeve, latching ram to the self-locking cover, open under the whole slips that prevents the sealing mechanism effect of power outside, also just prevented recyclable bridging plug seat envelope midway effectively.So the utility model can be widely used in the oil well packing construction of various oil wells, well, high angle hole and horizontal well.2, the utility model is provided with antiaircraft tensioner ring in the outside of two ends packing element, can prevent that the packing element in the outside, two ends from turning up because of pressure is excessive, applicable to the oil reservoir packing operation of high-pressure well.3, the utility model design separate sealing mechanism, simple to operate, easy construction can be salvaged by carrying the deblocking cover on the running string when needing.In sum, the utility model can improve the construction success rate of recyclable bridging plug in horizontal well, reduces operating cost, has enlarged the use model of recyclable bridging plug, has tangible economic benefit.
Description of drawings
Fig. 1 is first figure of the utility model structural representation.
Fig. 2 is second figure of the utility model structural representation.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description: referring to Fig. 1 and Fig. 2, oilfield downhole operation with the recyclable bridging plug of the anti-envelope of seat midway comprise back-off sub 1, central tube 3, separate sealing mechanism, sealing mechanism and seat sealing mechanism, separate sealing mechanism, sealing mechanism and seat sealing mechanism and be assembled in the outside of central tube 3 successively, back-off sub 1 is connected with the top of central tube 3, connects the anti-sealing mechanism of seat midway in the bottom of central tube 3.The anti-sealing mechanism of seat midway comprises locking cover 21, elasticity lock ring 22, gasket ring 23, retaining ring 24, from lock tube 25, latching ram 26 and locking cylinder sleeve 28, elasticity lock ring 22, gasket ring 23, retaining ring 24 are installed under the step of locking cover 21 top cylindricals; Latching ram 26 is sleeved on the middle part cylindrical that locks cover 21 by cutting off pin that it is fixing with locking cylinder sleeve 28; Circle and the bottom cylindrical screwed connection that locks cover 21 in the bottom of locking cylinder sleeve 28 are connected between locking cylinder sleeve 28 and the seat sealing liquid cylinder pressure 19 from lock tube 25.The cylindrical step that elasticity lock ring 22, gasket ring 23, retaining ring 24 and latching ram 26 is enclosed in locking cover 21 and a seat sealing liquid cylinder pressure 19, in the annular space that lock tube 25 and locking cylinder sleeve 28 form.Elasticity lock ring 22 and gasket ring 23 are installed between the step of retaining ring 24 and locking cover 21 top cylindricals at interval.Circle is provided with internal tooth and latch recess in the top of lock tube 25, and this latch recess cooperates with the outer lug boss of locking cylinder sleeve 28 cylinder body top cylindricals.Locking cylinder sleeve 28 cylinder body top cylindricals are provided with outer lug boss, and its top cylinder body is provided with axial pass trough and connects with the top, and the top that promptly locks cylinder sleeve 28 is for distinguishing shape, make things convenient at it directly upwards to enlarge or dwindle.Fenestra is provided with outer lug boss outside latching ram 26 tops, the outer lug boss of this top cylindrical supports the outer lug boss of locking cylinder sleeve 28 cylinder body top cylindricals just, the outer lug boss of locking cylinder sleeve 28 is locked all the time from lock tube 25 before suppressing the seat envelope, thereby realize locking, prevent seat envelope midway lower cone 18.The bottom body of central tube 3 is provided with pressure transmission hole, and this pressure transmission hole is corresponding with the cavity of locking cover 21 tops in the seat sealing liquid cylinder pressure 19.Sealing mechanism comprises packing element 12, spacer ring 13 and antiaircraft tensioner ring 11, and spacer ring 13 is installed between the packing element 12, and antiaircraft tensioner ring 11 is installed in the outside of two ends packing element 12.Separating sealing mechanism comprises and separates that big envelope 4, deblocking bear cover 5, cut off pin 6, seat blocks cover 7 and lock dog 8, separate big envelope 4 top cylindricals and be provided with the card tooth, the bottom cylindrical is equipped with deblocking, and to bear cover 5 fixing by cutting off pin 6, circle is equipped with seat and blocks a cover 7 and a lock dog 8 in its underpart, by adapter sleeve 9 and deblocking bear cover 5 is connected after with seat block overlap 7 and lock dog 8 be fixed in the bottom of separating big envelope 4 round in.The unidirectional tooth that the interior circle that seat blocks cover 7 is provided with on down unidirectional tooth and central tube 3 cylindricals up meshes.The top cylindrical and the deblocking of adapter sleeve 9 bears that cover 5 is connected, its middle part cylindrical is equipped with packing element 12 and spacer ring 13, the stop collar 14 of its underpart cylindrical and seat sealing mechanism with carry on the back cap 15 and be connected, will separate sealing mechanism, sealing mechanism and a sealing mechanism and link together.The seat sealing mechanism comprises stop collar 14, back of the body cap 15, upper cone 16, whole slips 17, lower cone 18 and seat sealing liquid cylinder pressure 19, stop collar 14 utilizes screwed connection to be in the same place with upper cone 16, back of the body cap 15 is connected with adapter sleeve 9 by screw thread, and stop collar 14 is carried out relative fixed; Lower cone 18 and seat sealing liquid cylinder pressure 19 are connected by screw thread, circle and preventing being connected from lock tube 25 of a sealing mechanism midway in the bottom of seat sealing liquid cylinder pressure 19.For guaranteeing the sealing performance between each parts, between central tube 3 and back-off sub 1 and adapter sleeve 9, sealing ring 2 and 10 are housed; Between present sealing liquid cylinder pressure 19 and central tube 3 bottoms and the locking cover 20 sealing ring 20 is housed; On the interior circle of latching ram 26 bottoms and cylindrical, also be provided with sealing ring 27.
During use this set of tools is installed the back with in the running string lower going-into-well, ground utilizes cementing truck to suppress from central tube 3 after arriving design attitude, water pressure enters the cavity of locking cover 21 tops from the pressure transmission hole of central tube 3, elasticity lock ring 22 and gasket ring 23 are compressed, under the effect of water pressure, make latching ram 26 up and will cut off pin cut off the back continue up, when running to the limited step of locking cover 21 bottoms till.Lock the outer lug boss of cylinder sleeve 28 top cylindricals this moment, support and release automatically in will losing.It is up together that will promote lower cone 18, whole slips 17, upper cone 16, antiaircraft tensioner ring 11, packing element 12, spacer ring 13, stop collar 14 at following sealing liquid cylinder pressure 19 of the effect of water pressure this moment, because seat blockade cover 7 and lock dog 8 are with adapter sleeve 9 and central tube 3 relative fixed, under the effect of water pressure, will make packing element 12 compression for this reason and expand, reach certain pressure after whole slips 17 also will swell and be clamped on the sleeve pipe.After reaching design seat seal pressure, the pressure release of ground cement car, positive tube post is given up, and trips out running string and can realize the packing operation.
Claims (9)
1. oilfield downhole operation seals recyclable bridging plug with anti-seat midway, comprise back-off sub (1), central tube (3), separate sealing mechanism, sealing mechanism and seat sealing mechanism, separate sealing mechanism, sealing mechanism and seat sealing mechanism and be assembled in the outside of central tube (3) successively, back-off sub (1) is connected with the top of central tube (3), it is characterized in that at the anti-seat midway of the bottom of central tube (3) connection sealing mechanism.
2. oilfield downhole operation according to claim 1 seals recyclable bridging plug with anti-seat midway, it is characterized in that the anti-sealing mechanism of seat midway comprise locking cover (21), elasticity lock ring (22), gasket ring (23), retaining ring (24), from lock tube (25), latching ram (26) and locking cylinder sleeve (28), elasticity lock ring (22), gasket ring (23), retaining ring (24) are installed in locking and overlap under the step of (21) top cylindrical; Latching ram (26) is sleeved on locking and overlaps on the middle part cylindrical of (21) by cutting off pin that itself and locking cylinder sleeve (26) is fixing; Circle and the bottom cylindrical screwed connection that locks cover (21) in the bottom of locking cylinder sleeve (28) are connected between locking cylinder sleeve (28) and the seat sealing liquid cylinder pressure (19) from lock tube (25).
3. oilfield downhole operation according to claim 2 is characterized in that with the recyclable bridging plug of the anti-envelope of seat midway elasticity lock ring (22) and gasket ring (23) are installed between the step of retaining ring (24) and locking cover (21) top cylindrical at interval.
4. oilfield downhole operation according to claim 2 is characterized in that locking cylinder sleeve (28) cylinder body top cylindrical and is provided with outer lug boss with the recyclable bridging plug of the anti-envelope of seat midway, and its top cylinder body is provided with axial pass trough and the top connects; Fenestra is provided with outer lug boss outside latching ram (26) top.
5. oilfield downhole operation according to claim 2 is characterized in that with the recyclable bridging plug of the anti-envelope of seat midway circle is provided with internal tooth and latch recess in the top of lock tube (25), and this latch recess cooperates with the outer lug boss of locking cylinder sleeve (28) cylinder body top cylindrical.
6. oilfield downhole operation according to claim 1 is characterized in that with the recyclable bridging plug of the anti-envelope of seat midway the pressure transmission hole of central tube (3) bottom body is corresponding with the cavity of locking cover (21) top in the seat sealing liquid cylinder pressure (19).
7. oilfield downhole operation according to claim 1 seals recyclable bridging plug with anti-seat midway, it is characterized in that sealing mechanism comprises packing element (12), spacer ring (13) and antiaircraft tensioner ring (11), spacer ring (13) is installed between the packing element (12), and antiaircraft tensioner ring (11) is installed in the outside of two ends packing element (12).
8. oilfield downhole operation according to claim 1 seals recyclable bridging plug with anti-seat midway, it is characterized in that separating sealing mechanism comprises and separates that big envelope (4), deblocking bear cover (5), cut off pin (6), seat blocks cover (7) and lock dog (8), separate big envelope (4) top cylindrical and be provided with the card tooth, the bottom cylindrical is equipped with deblocking, and to bear cover (5) fixing by cutting off pin (6), circle is equipped with seat and blocks cover (7) and a lock dog (8) in its underpart, by adapter sleeve (9) and deblocking bear cover (5) be connected after with the seat blockade overlap (7) and lock dog (8) be fixed in the bottom of separating big envelope (4) round in.
9. oilfield downhole operation according to claim 8 is with the recyclable bridging plug of the anti-envelope of seat midway, it is characterized in that the unidirectional tooth that interior circle that seat blocks cover (7) is provided with on down unidirectional tooth and central tube (3) cylindrical up meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201629741U CN202055799U (en) | 2011-05-12 | 2011-05-12 | Midway-setting prevention recyclable bridge plug for oilfield downhole operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201629741U CN202055799U (en) | 2011-05-12 | 2011-05-12 | Midway-setting prevention recyclable bridge plug for oilfield downhole operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202055799U true CN202055799U (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201629741U Expired - Fee Related CN202055799U (en) | 2011-05-12 | 2011-05-12 | Midway-setting prevention recyclable bridge plug for oilfield downhole operation |
Country Status (1)
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| CN (1) | CN202055799U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493782A (en) * | 2011-12-15 | 2012-06-13 | 中国石油集团渤海钻探工程有限公司 | Bridge plug for horizontal well |
| CN102561988A (en) * | 2012-01-18 | 2012-07-11 | 中国石油天然气股份有限公司 | Small-diameter water-swelling setting plug |
| CN104989320A (en) * | 2015-07-17 | 2015-10-21 | 牡丹江市井田石油钻采配件有限公司 | Sliding way type releasing bridge plug |
| CN110656886A (en) * | 2019-10-14 | 2020-01-07 | 大庆油田有限责任公司 | Horizontal well landing segment geosteering method |
| CN111021985A (en) * | 2018-10-09 | 2020-04-17 | 中国石油天然气股份有限公司 | Bridge plug |
-
2011
- 2011-05-12 CN CN2011201629741U patent/CN202055799U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493782A (en) * | 2011-12-15 | 2012-06-13 | 中国石油集团渤海钻探工程有限公司 | Bridge plug for horizontal well |
| CN102561988A (en) * | 2012-01-18 | 2012-07-11 | 中国石油天然气股份有限公司 | Small-diameter water-swelling setting plug |
| CN102561988B (en) * | 2012-01-18 | 2014-04-02 | 中国石油天然气股份有限公司 | Small-diameter water-swelling setting plug |
| CN104989320A (en) * | 2015-07-17 | 2015-10-21 | 牡丹江市井田石油钻采配件有限公司 | Sliding way type releasing bridge plug |
| CN104989320B (en) * | 2015-07-17 | 2017-07-07 | 牡丹江市井田石油钻采配件有限公司 | Chute type sub-releasing axle plug |
| CN111021985A (en) * | 2018-10-09 | 2020-04-17 | 中国石油天然气股份有限公司 | Bridge plug |
| CN110656886A (en) * | 2019-10-14 | 2020-01-07 | 大庆油田有限责任公司 | Horizontal well landing segment geosteering method |
| CN110656886B (en) * | 2019-10-14 | 2021-06-15 | 大庆油田有限责任公司 | Horizontal well landing segment geosteering method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20130512 |