CN203961903U - Oil-pipe bridge plug - Google Patents
Oil-pipe bridge plug Download PDFInfo
- Publication number
- CN203961903U CN203961903U CN201420380377.XU CN201420380377U CN203961903U CN 203961903 U CN203961903 U CN 203961903U CN 201420380377 U CN201420380377 U CN 201420380377U CN 203961903 U CN203961903 U CN 203961903U
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- Prior art keywords
- center tube
- diameter
- sealing
- give
- lock core
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Abstract
The utility model discloses a kind of oil-pipe bridge plug, for pressure and the fluid in the inner upper and lower space of packing oil pipe, realize on replace with pressure production tree and hang operation.This bridging plug is mainly by sealing mechanism with set releasing gadget two parts and form.Sealing mechanism is also to have beaten after bridging plug to stay the part that plays packing effect in oil pipe, comprises central tube, lower back-off sub, fishing head, seal bar, lock core, lock dog, spring, lower house, sets shear pin, one-way slip, cone, cartridge, packing element spacer ring, carries on the back the parts such as cap.Set releasing gadget and be and bridging plug is completed set to move and realize the part of giving up, comprise top connection, piston rod, upper shell, set piston, elasticity lifts claw, on the first-class parts of giving up.This oil-pipe bridge plug is delivered in oil pipe with hollow stem, by suppressing in central tube, makes piston produce up thrust, drives central tube, lock dog to move upward, and realizes that compression packing element, grappling slips, locking set state, the action such as give up.For the upper and lower space of packing oil pipe with pressure, realize on replace with pressure production tree and hanging.
Description
Technical field
The utility model relates to the downhole tool of a kind of oil-gas field development application, is particularly useful for hanging on production tree the oil-pipe bridge plug that operation occurs to hang on water injection well that thorn leaks and water-sensitive strata replace with pressure production tree.
Background technology
Generally all in 30MPa left and right, there is thorn if hang on production tree between the flood period and leak in the well head pressure of water injection well, current way is now to drive a well to bleed off pressure a period of time, after well head pressure reduces, uses well killing fluid kill-job again, finally changes on production tree and hangs.This kind of way long construction period, operating cost is high, and affects flood effectiveness.
For some water-sensitive strata, if occur in Oil/gas Well manufacturing process on production tree, hang and thorn occurs leak, if change the operational method of hanging on production tree after also adopting first kill-job, can cause operation after stratum there is water blocking damage, Oil/gas Well Severe Reduction or stopping production.
Calker in existing oil pipe, or cannot under wellheadpressure state, use, or cannot trip out smoothly after installing, directly resume production.In a word, current existing instrument and operational method cannot meet and shorten duty cycle, reduce operating cost, reduce the requirement of operation to formation influence.
Utility model content
Technical problem to be solved in the utility model is, provides a kind of and can on the production tree of well head, hang when thorn occurring leaking, and without kill-job, the direct oil-pipe bridge plug of upper and lower space pressure and fluid in packing oil pipe.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of oil-pipe bridge plug, comprise top connection, piston rod, boss shape piston, on give up, upper shell, sealing push rod, under give up, lock core, fishing head, slip spider, upper center tube, lower center tube, lock dog, spring, set shear pin, slips, cone, cartridge, rigidity spacer ring, retaining ring, plug; Top connection upper end is connected with carrier pipe by internal thread, and lower end is connected with the internal thread of piston rod upper end by external screw thread; Relief hole is arranged at piston rod top, and lower end external screw thread is connected with upper shell upper end internal thread, lower end inner side by sealing ring with on the outside of giving up form sealing; There is axially extending bore at boss shape piston center, and upper outside forms sealing by sealing ring and top connection inner side, and lower outside forms sealing by sealing ring and piston rod inner side, and bottom is connected with the external screw thread at the top of above giving up by internal thread; On have axially extending bore in the middle of giving up, there is radially pressure transmission hole screw top below, can be to boss shape piston below transmission of pressure; The axially extending bore diameter of pressure transmission hole below is larger than the through-hole diameter on its top, and the axially extending bore inner side of below forms sealing with sealing push rod top by sealing ring; Sealing push rod is that upper diameter is little but length is large, lower diameter large but the little cylindrical, massive boss of length, the large diameter cylindrical boss external diameter in bottom with on the bottom internal diameter size of giving up identical, by step, make to give up bottom with under the top of giving up be connected; Sealing push rod is connected with the external screw thread at lock core top by bottom internal thread; On outer wall of lock core, cover is given up under having; Under give up and be connected with upper center tube top internal thread by lower external thread; Upper center tube upper outside cover has fishing head, and lock core is being inserted in inner side; Fishing head outer surface of upper has ratchet hangnail, and middle part is enclosed within the inner side of upper shell bottom, and bottom is connected with the internal thread of slip spider by external screw thread; Slip spider is enclosed within upper center tube and lower center tube outside, by setting shear pin, is fixed on lower center tube outside, and bottom hangs slips; In the gap of upper center tube inner side and lock core, cover has spring; Spring applies downward pressure to lock core, is tightly pressing the lock dog of its below; Lock dog is embedded in upper center tube bottom, and soffit contacts with the interface of upper center tube and lower center tube, and inner surface contacts with lock core, and external surface contacts with slip spider upper inner; Outside lower center tube, slips below is overlapped and is had cone, the first cartridge, rigidity spacer ring, the second cartridge, retaining ring successively; Lower center tube bottom is connected with plug by internal thread.
Upper center tube and lower center tube are an overall structure, and external diameter is identical, and upper center tube internal diameter is large, and lower center tube internal diameter is little, and boundary is perpendicular to the plane of axis direction; Slip spider upper inside surface is the up big and down small cylindrical boss structure of diameter; Close contact between the inner surface of slip spider top minor diameter and the external surface of lock dog when instrument enters well, while setting, lock dog moves upward to large diameter inner surface place, slip spider top with central tube, lock dog outwards opens under the pressure-acting of lock core, contact with large diameter inner surface, complete mandrel lock out action.
On give up bottom for annular minute claw structure, by sealing push rod bottom large diameter cylinder partial fixing in the groove on lower back-off sub top; When sealing push rod bottom large diameter cylinder partly moves downward the bottom of giving up when following, upper back-off sub and the realization of lower back-off sub are slipped out of the hand.
The utility model be a kind of can be with pressure the new tool in the inner upper and lower space of packing oil pipe, can realize not kill-job, on replace with pressure production tree, hang operation, can effectively shorten duty cycle, reduce operating cost, reduce the impact of operation on stratum.Maximum operating pressure differential 35MPa.
Accompanying drawing explanation
Fig. 1 is the structural representation before the utility model is used.
Fig. 2 stays the sealing mechanism schematic diagram in oil pipe after the utility model is used.
In figure: 1, top connection; 2, piston rod; 3, boss shape piston; 4, on, give up; 5, upper shell; 6, sealing push rod; 7, under, give up; 8, lock core; 9, fishing head; 10, slip spider; 11, upper center tube; 12, lock dog; 13, spring; 14, set shear pin; 15, lower center tube; 16, slips; 17, cone; 18, the first cartridge; 19, rigidity spacer ring; 20, the second cartridge; 21, retaining ring; 22, plug; 23, pressure transmission hole; 24,25,26, relief hole.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As shown in Figure 1, 2, oil-pipe bridge plug of the present utility model, comprise top connection 1, piston rod 2, boss shape piston 3, on give up 4, upper shell 5, sealing push rod 6, under give up 7, lock core 8, fishing head 9, slip spider 10, upper center tube 11, lower center tube 15, lock dog 12, spring 13, set shear pin 14, slips 16, cone 17, cartridge, rigidity spacer ring 19, retaining ring 21, plug 22; Top connection 1 upper end is connected with carrier pipe by internal thread, and lower end is connected with the internal thread of piston rod 2 upper ends by external screw thread; Relief hole 26 is arranged at piston rod 2 tops, and lower end external screw thread is connected with upper shell 5 upper end internal threads, lower end inner side by sealing ring with on 4 outsides of giving up form sealing; There is axially extending bore at boss shape piston 3 centers, and upper outside forms sealing by sealing ring and top connection 1 inner side, and lower outside forms sealing by sealing ring and piston rod 2 inner sides, and bottom is connected with the external screw thread at 4 tops of above giving up by internal thread; On give up and have axially extending bore in the middle of 4, there is radially pressure transmission hole 23 screw top below, can be to boss shape piston 3 below transmission of pressures; The axially extending bore diameter of pressure transmission hole 23 belows is larger than the through-hole diameter on its top, and the axially extending bore inner side of below forms sealing with sealing push rod 6 tops by sealing ring; Sealing push rod 6 is that upper diameter is little but length is large, lower diameter large but the little cylindrical, massive boss of length, the large diameter cylindrical boss external diameter in bottom with on the 4 bottom internal diameter sizes of giving up identical, by step, make to give up 4 bottoms with under 7 tops of giving up be connected; Sealing push rod 6 is connected with the external screw thread at lock core 8 tops by bottom internal thread; On lock core 8 outer walls, cover gives up 7 under having; Under give up and 7 by lower external thread, be connected with upper center tube 11 top internal threads; Upper center tube 11 upper outside covers have fishing head 9, and lock core 8 is being inserted in inner side; Fishing head 9 outer surface of upper have ratchet hangnail, and middle part is enclosed within the inner side of upper shell 5 bottoms, and bottom is connected with the internal thread of slip spider 10 by external screw thread; Slip spider 10 is enclosed within upper center tube 11 and lower center tube 15 outsides, by setting shear pin 14, is fixed on lower center tube 15 outsides, and bottom hangs slips 16; In the gap of upper center tube 11 inner sides and lock core 8, cover has spring 13; 13 pairs of lock cores 8 of spring apply downward pressure, are tightly pressing the lock dog 12 of its below; Lock dog 12 is embedded in upper center tube 11 bottoms, and soffit contacts with the interface of lower center tube 15 with upper center tube 11, and inner surface contacts with lock core 8, and external surface contacts with slip spider 10 upper inner; Lower center tube 15 outside slips 16 belows are overlapped successively cone 17, the first cartridge 18, rigidity spacer ring 19, the second cartridge 20, retaining ring 21; Lower center tube 15 bottoms are connected with plug 22 by internal thread.
Upper center tube 11 and lower center tube 15 are an overall structure, and external diameter is identical, and upper center tube 11 internal diameters are large, and lower center tube 15 internal diameters are little, and boundary is perpendicular to the plane of axis direction; Slip spider 10 upper inside surface are the up big and down small cylindrical boss structure of diameter; Close contact between the inner surface of slip spider 10 top minor diameters and the external surface of lock dog 12 when instrument enters well, while setting, lock dog 12 moves upward to slip spider 10 large diameter inner surface places, top with central tube, lock dog 12 outwards opens under the pressure-acting of lock core 8, contact with large diameter inner surface, complete mandrel lock out action.
On give up 4 bottoms for annular minute claw structure, by sealing push rod 6 bottom large diameter cylinder partial fixings in the groove on lower back-off sub 7 tops; When sealing push rod 6 bottom large diameter cylinders partly move downward, give up 4 bottoms when following, upper back-off sub 4 is slipped out of the hand with lower back-off sub 7 realizations.
Below use procedure of the present utility model is described:
As shown in Figure 1, the top connection of bridging plug assembly 1 and the screwed connection of conveying lever lower end, be lowered to this instrument in oil pipe, then to pumping liquid in carrier pipe, boosts.Pressure acts on the bottom of piston 3 and the top of seal bar 6 by pressure transmission hole 23.Piston 3 is stressed and produces the trend that moves upward.When piston is subject to power upwards when enough large, set shear pin 14 and cut off, on piston driving, give up 4, under give up 7, upper center tube 11, lower center tube 15, seal push rod 6, lock core 8 moves upward together.In the process of moving upward, cone 17 can first all be opened the slips 16 being suspended on slip spider 10, and it is stuck on tube inner wall, and then cone 17 stops moving upward, the first cartridge 18 and the second cartridge 20 are compressed, seal up the space up and down of oil pipe inside.Now, lock dog 12 has moved up to hole enlargement place on slip spider 10 tops with central tube, and sealing push rod starts to move downward under pressure, forces lock core descending, and lock dog opens.When sealing push rod lower end major diameter componental movement divides claw structure following to the annular of the bottom of above giving up, a minute claw loses inner restriction, at piston, under upper pulling force effect, shrink, with under give up and slip out of the hand.
Upper exhaust core bar trip out top connection 1, piston rod 2, boss shape piston 3, on give up 4 and upper shell 5.Stay well part as shown in Figure 2.After having changed on production tree and hanging, then be lowered to special-purpose fishing socket with hollow stem, drag for the ratchet that seals push rod 6 and fishing head 9 outsides.Upper bailer, sealing push rod 6 first Compress Spring 13 moves upward, and lock dog 12 loses inner restriction, at packing element screen resilience effect lower center tube, moves downward, and lock dog 12 undergauge returns, complete release operation.In continuation, carrying fishing socket can trip out instrument on production tree and hang.
In sum, content of the present utility model is not limited to the above embodiments, knowledgeable people in same area can propose easily according to technological guidance's thought of the present utility model other embodiment, but within this embodiment is included in scope of the present utility model.
Claims (3)
1. an oil-pipe bridge plug, it is characterized in that, comprise top connection (1), piston rod (2), boss shape piston (3), on give up (4), upper shell (5), sealing push rod (6), under give up (7), lock core (8), fishing head (9), slip spider (10), upper center tube (11), lower center tube (15), lock dog (12), spring (13), set shear pin (14), slips (16), cone (17), cartridge, rigidity spacer ring (19), retaining ring (21), plug (22); Top connection (1) upper end is connected with carrier pipe by internal thread, and lower end is connected with the internal thread of piston rod (2) upper end by external screw thread; Relief hole (26) is arranged at piston rod (2) top, and lower end external screw thread is connected with upper shell (5) upper end internal thread, lower end inner side by sealing ring with on (4) outside of giving up form sealing; There is axially extending bore at boss shape piston (3) center, upper outside forms sealing by sealing ring and top connection (1) inner side, lower outside forms sealing by sealing ring and piston rod (2) inner side, and bottom is connected with the external screw thread at (4) top of above giving up by internal thread; On give up and have axially extending bore in the middle of (4), there is radially pressure transmission hole (23) screw top below, can be to boss shape piston (3) below transmission of pressure; The axially extending bore diameter of pressure transmission hole (23) below is larger than the through-hole diameter on its top, and the axially extending bore inner side of below forms sealing with sealing push rod (6) top by sealing ring; Sealing push rod (6) is that upper diameter is little but length is large, lower diameter is large but the little cylindrical, massive boss of length, the large diameter cylindrical boss external diameter in bottom with on (4) bottom internal diameter size of giving up identical, by step, make to give up (4) bottom with under (7) top of giving up be connected; Sealing push rod (6) is connected with the external screw thread at lock core (8) top by bottom internal thread; Cover give up under having (7) on lock core (8) outer wall; Under give up (7) by lower external thread, be connected with upper center tube (11) top internal thread; Upper center tube (11) upper outside cover has fishing head (9), and lock core (8) is being inserted in inner side; Fishing head (9) outer surface of upper has ratchet hangnail, and middle part is enclosed within the inner side of upper shell (5) bottom, and bottom is connected with the internal thread of slip spider (10) by external screw thread; Slip spider (10) is enclosed within upper center tube (11) and lower center tube (15) outside, by setting shear pin (14), is fixed on lower center tube (15) outside, and bottom hangs slips (16); In the gap of upper center tube (11) inner side and lock core (8), cover has spring (13); Spring (13) applies downward pressure to lock core (8), is tightly pressing the lock dog (12) of its below; Lock dog (12) is embedded in upper center tube (11) bottom, soffit contacts with the interface of lower center tube (15) with upper center tube (11), inner surface contacts with lock core (8), and external surface contacts with slip spider (10) upper inner; There are cone (17), the first cartridge (18), rigidity spacer ring (19), the second cartridge (20), retaining ring (21) in lower center tube (15) outside slips (16) below successively cover; Lower center tube (15) bottom is connected with plug (22) by internal thread.
2. oil-pipe bridge plug according to claim 1, is characterized in that, upper center tube (11) and lower center tube (15) are an overall structure, external diameter is identical, upper center tube (11) internal diameter is large, and lower center tube (15) internal diameter is little, and boundary is perpendicular to the plane of axis direction; Slip spider (10) upper inside surface is the up big and down small cylindrical boss structure of diameter; Close contact between the inner surface of slip spider when instrument enters well (10) top minor diameter and the external surface of lock dog (12), lock dog while setting (12) moves upward to large diameter inner surface place, slip spider (10) top with central tube, lock dog (12) outwards opens under the pressure-acting of lock core (8), contact with large diameter inner surface, complete mandrel lock out action.
3. oil-pipe bridge plug according to claim 1 and 2, is characterized in that, (4) bottom of above giving up is for annular minute claw structure, by sealing push rod (6) bottom large diameter cylinder partial fixing in the groove on lower back-off sub (7) top; When following bottom sealing push rod (6) bottom large diameter cylinder partly moves downward give up (4), upper back-off sub (4) realizes and slipping out of the hand with lower back-off sub (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420380377.XU CN203961903U (en) | 2014-07-09 | 2014-07-09 | Oil-pipe bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420380377.XU CN203961903U (en) | 2014-07-09 | 2014-07-09 | Oil-pipe bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203961903U true CN203961903U (en) | 2014-11-26 |
Family
ID=51922502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420380377.XU Withdrawn - After Issue CN203961903U (en) | 2014-07-09 | 2014-07-09 | Oil-pipe bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203961903U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074491A (en) * | 2014-07-09 | 2014-10-01 | 中国石油集团渤海钻探工程有限公司 | Oil pipe bridge plug |
| CN105064953A (en) * | 2015-07-20 | 2015-11-18 | 中国石油集团渤海钻探工程有限公司 | Rapidly degradable bridge plug with degradation-promoting central pipe |
| CN106761540A (en) * | 2017-01-04 | 2017-05-31 | 廊坊开发区森德石油设备有限公司 | A kind of optional position is two-way to set bridging plug |
| CN113107417A (en) * | 2020-01-13 | 2021-07-13 | 中国石油天然气股份有限公司 | Soluble releasing plug |
-
2014
- 2014-07-09 CN CN201420380377.XU patent/CN203961903U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074491A (en) * | 2014-07-09 | 2014-10-01 | 中国石油集团渤海钻探工程有限公司 | Oil pipe bridge plug |
| CN105064953A (en) * | 2015-07-20 | 2015-11-18 | 中国石油集团渤海钻探工程有限公司 | Rapidly degradable bridge plug with degradation-promoting central pipe |
| CN105064953B (en) * | 2015-07-20 | 2017-09-05 | 中国石油集团渤海钻探工程有限公司 | With the fast degradation bridging plug for promoting degraded central tube |
| CN106761540A (en) * | 2017-01-04 | 2017-05-31 | 廊坊开发区森德石油设备有限公司 | A kind of optional position is two-way to set bridging plug |
| CN113107417A (en) * | 2020-01-13 | 2021-07-13 | 中国石油天然气股份有限公司 | Soluble releasing plug |
| CN113107417B (en) * | 2020-01-13 | 2022-05-10 | 中国石油天然气股份有限公司 | Soluble releasing plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141126 Effective date of abandoning: 20160518 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |