CN207296955U - The staged fracturing bridge plug of recycling can be salvaged in batches - Google Patents

The staged fracturing bridge plug of recycling can be salvaged in batches Download PDF

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Publication number
CN207296955U
CN207296955U CN201721250925.7U CN201721250925U CN207296955U CN 207296955 U CN207296955 U CN 207296955U CN 201721250925 U CN201721250925 U CN 201721250925U CN 207296955 U CN207296955 U CN 207296955U
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China
Prior art keywords
locking
central tube
packing
cylinder
bridge plug
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CN201721250925.7U
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Chinese (zh)
Inventor
彭小平
陈龙
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Sinopec Oilfield Service Corp
Sinopec Jianghan Petroleum Engineering Co Ltd
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Sinopec Oilfield Service Corp
Sinopec Jianghan Petroleum Engineering Co Ltd
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Priority to CN201721250925.7U priority Critical patent/CN207296955U/en
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Abstract

It the utility model is related to a kind of staged fracturing bridge plug that can salvage recycling in batches, including cage, lifting sub, locking outer barrel, locking inner cylinder, locking pawl, central tube, packing element, packing element central tube, double grappling slips, cone, slips spring and fishing socket;Cage is connected by screw thread with lifting sub, lifting sub is connected by unsealing pin with locking inner cylinder, locking inner cylinder is connected by locking pawl with central tube, central tube is connected by screw thread with fishing socket, locking outer barrel is connected by screw thread with packing element central tube, packing element is sleeved on the outside of packing element central tube, and packing element central tube is connected by screw thread with cone, the double grappling slips of installation and slips spring on the outside of cone.The utility model can disposably salvage well head after pressure break by tripping in coiled tubing, mill need not be bored, because without producing chip, wellbore clean can at utmost be kept, duty cycle is short at the same time, it is safe and efficient, it is of great immediate significance for the shale gas low cost development currently advocated.

Description

The staged fracturing bridge plug of recycling can be salvaged in batches
Technical field
The staged fracturing field of shale gas exploitation is the utility model is related to, can be salvaged in batches more specifically to one kind The staged fracturing bridge plug of recycling.
Background technology
Recyclable bridge plug mainly uses in conventional oil gas well as packer in industry at present, but also simply list only should With there is no batch jobs function.Recyclable bridge plug is not applied also in shale gas well, in the extensive staged fracturing of shale gas In production practice, based on the application of drilling bridging plug, but chip can be produced during being ground in the presence of brill, in bad hole track It is not easy to salvage totally, easily causes bit freezing equivalent risk, it is necessary to which site operation personnel have higher technical merit just to can guarantee that safety Construction.The new products such as solvable bridge plug are begun attempt in industry in recent years, but live practical probation does not reach ground experiment also temporarily Ideal effect.
Utility model content
The technical problems to be solved in the utility model is, there is provided a kind of staged fracturing bridge that can salvage recycling in batches Plug, its construction efficiency is high, and duty cycle is short, and can at utmost keep wellbore clean, suitable for shale gas well staged fracturing.
Technical solution is used by the utility model solves its technical problem:Construct a kind of point that can salvage recycling in batches In section pressure break bridge plug, including cage, lifting sub, locking outer barrel, locking inner cylinder, locking pawl, central tube, packing element, packing element Heart pipe, double grappling slips, cone, slips spring and fishing socket;
The cage is connected by screw thread with lifting sub, and lifting sub is connected by unsealing pin with locking inner cylinder, is locked Determine inner cylinder to be connected with central tube by locking pawl, central tube is connected by screw thread with fishing socket, locking outer barrel by screw thread with Packing element central tube connects, and the packing element is sleeved on the outside of packing element central tube, and packing element central tube is connected by screw thread with cone, the cone External side installation pair grappling slips and slips spring.
Be equipped with such scheme, in the cage cage bar, central tube as fluid passage ball, thimble, set pin hole And fishing neck, the cage pole spacing live ball, the thimble is radially contacted with ball.
In such scheme, anti-retrogression tooth is equipped with locking inner cylinder and hooks step.
In such scheme, when for it is setting when, setting tool is by setting pin and fixing ball setting pin hole installation Cage, setting tool promote locking outer barrel downlink, the packing element central tube being connected with locking outer barrel, the cone being connected with packing element central tube Also downlink, cone downlink release bidirectionally anchoring slips therewith, until bidirectionally anchoring slips runs into casing wall and fixation, setting tool Continuing to press on locking outer barrel causes packing element to compress and expand, until packing element cannot continue to compress after being expanded into the limit, setting tool Locking outer barrel can not be continued to press on to cause to set pin cutting, be finally completed and set, lock and pass through between outer barrel and locking inner cylinder Anti-retrogression tooth connects, and locking outer barrel is moved axially relative to locking inner cylinder from cage to fishing socket.
In such scheme, when for unsealing, dipper drags for fishing neck, drives cage uplink, breaks deblocking pin, cause Lifting sub is separated with locking inner cylinder, continues above to carry fishing socket, drives lifting sub uplink, causes lifting step to hook locking Inner cylinder, while locking pawl disengages, and causes locking inner cylinder to be separated with central tube;Continue above to carry fishing socket, drive on locking inner cylinder OK, cause hook step to hook locking outer barrel, cause to lock outer barrel drive packing element central tube and cone uplink, bidirectionally anchoring card Watt the support of cone is lost, and withdrawn under the action of slips spring, while packing element loses the diminution recycling of support, is finally completed Deblocking.
In such scheme, fixed C rings and corresponding C annular grooves are provided between packing element central tube and central tube, in deblocking process Middle to complete after moving axially, fixed C rings are caught in corresponding C annular grooves, make packing element central tube and central tube mutually locking, it is impossible to carry out phase To axial movement.
In such scheme, when fishing socket, which entangles fishing neck, above proposes deblocking, thimble inwardly stretches out, by top dome from ball seat.
In such scheme, the end of the fishing socket and the end of cage are the slope with equal angular.
In such scheme, the central tube is as fluid passage.
Implement the staged fracturing bridge plug that can salvage recycling in batches of the utility model, have the advantages that:
The utility model can disposably salvage well head after pressure break by tripping in coiled tubing, it is not necessary to bore Mill, because without producing chip, can at utmost keep wellbore clean, while duty cycle is short, safe and efficient, for current The shale gas low cost development of promotion is of great immediate significance.
Brief description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the structure diagram of bridge plug in an initial condition;
Fig. 2 is structure diagram of the bridge plug under setting state;
Fig. 3 is structure diagram of the bridge plug under unset state;
Fig. 4 is structure diagram of the bridge plug under salvaging state.
Embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, it is detailed now to compare attached drawing Illustrate specific embodiment of the present utility model.
As Figure 1-Figure 4, the utility model batch can salvage in batches the staged fracturing of recycling bridge plug include cage 1, Lifting sub 2, locking outer barrel 3, locking inner cylinder 4, locking pawl 5, central tube 6, packing element 7, packing element central tube 8, double grappling slips 9th, cone 10, slips spring 11 and fishing socket 12.
As shown in Figure 1, under original state, cage 1 is connected by screw thread with lifting sub 2, and lifting sub 2 is by solving offset Nail is connected with locking inner cylinder 4, and locking inner cylinder 4 is connected by locking pawl 5 with central tube 6, and central tube 6 passes through screw thread and fishing socket 12 connections, therefore cage 1, lifting sub 2, locking inner cylinder 4, locking pawl 5, central tube 6 form a rigidity with fishing socket 12 It is overall;Locking outer barrel 3 is connected by screw thread with packing element central tube 8, and packing element central tube 8 is connected by screw thread with cone 10.Center Pipe 6 is used as fluid passage, disclosure satisfy that shale gas well staged fracturing job requirements.
Cage bar 101, ball 102 are equipped with cage 1, thimble 103, sets pin hole 104 and fishing neck 105;Lifting sub 2 It is interior to be equipped with deblocking pin 201 and lifting step 202;Lock and anti-retrogression tooth 401 and hook step 402 are equipped with inner cylinder 4;In packing element 8 top of heart pipe is equipped with fixed C rings 801.
Fishing socket 12 matches completely in size design with cage 1, under the salvaging of fishing socket 12 that can use a bridge plug 1 position of cage of one bridge plug, realizes batch fishing.
The end face 1201 of fishing socket 12 is designed with the slope of equal angular, and bridge plug main body with the end face 106 of cage 1 Material is composite material, is easy to brill and removes.When the unsuccessful needs of salvaging bore mill operation, end face when upper and lower two bridge plugs contact Engagement, will not be freely rotated, and be convenient for boring mill.
8 upper design of packing element central tube has fixed C rings 801, can lock each component locations of the bridge plug unsealed relatively, Prevent from salvaging to stop at pushing under power effect, the bridge plug unsealed is again setting.
The bridge plug being illustrated in figure 2 under setting state.Setting procedure:Setting tool is by installing setting pin hole 104 Set pin and fix cage 1, above-mentioned rigidity is overall, and setting tool promotes locking 3 downlink of outer barrel, outer with locking so as to fix The packing element central tube 8 of the connection of cylinder 3, also downlink, 10 downlink of cone release two-way anchor to the cone 10 being connected with packing element central tube 8 therewith Determine slips 9, until bidirectionally anchoring slips 9 runs into casing wall and fixation, setting tool continues to press on locking outer barrel 3 and causes packing element 7 Compress and expand, until packing element 7 cannot continue to compress after being expanded into the limit, setting tool can not continue to press on locking outer barrel 3 and make Cut into pin is set, be finally completed and set.
Connected between locking outer barrel 3 and locking inner cylinder 4 by anti-retrogression tooth 401, make locking outer barrel 3 can only be relative to locking Inner cylinder 4 moves axially (downlink) from 1 direction of cage to 12 direction of fishing socket, and opposite direction (uplink) is made due to anti-retrogression tooth 401 With and lock, therefore ensure bridge plug will not unseal.
The bridge plug being illustrated in figure 3 under unset state.Deblocking process:Fishing socket 12 drags for fishing neck 105, drives cage 1 Uplink, breaks deblocking pin 201, causes lifting sub 2 to be separated with locking inner cylinder 4, continues above to carry fishing socket 12, drives lifting short 2 uplinks are saved, cause lifting step 202 to hook locking inner cylinder 4, while locking pawl 5 disengages, and causes to lock inner cylinder 4 and center Pipe 6 separates, and above-mentioned rigidity is overall to decompose;Continue above to carry fishing socket 12, drive locking 4 uplink of inner cylinder, cause to hook 402 hook of step Locking outer barrel 3 is tangled, causes to lock the drive packing element of outer barrel 3 central tube 8 and 10 uplink of cone, bidirectionally anchoring slips 9 loses cone 10 support, and withdrawn under the action of slips spring 11, while packing element 7 is because since same cause is in the case where losing support Recycling is reduced, is finally completed deblocking.
Fixed C rings 801 and corresponding C annular grooves are provided between packing element central tube 8 and central tube 6, is completed during deblocking After axial movement, fixed C rings 801 are caught in corresponding C annular grooves, make packing element central tube 8 and 6 mutually locking of central tube, it is impossible to carry out phase To axial movement, therefore ensure that bridge plug will not restting.
The bridge plug being illustrated in figure 4 under salvaging state.After pressing crack construction, using coiled tubing band 12 tripping in of fishing socket 1 fishing neck of cage, 105 position for entangling first bridge plug upper end above carries, and completes the deblocking of first bridge plug.Complete first bridge The solution of plug is honored as a queen, and coiled tubing entangles second bridge with first bridge plug test with the fishing socket 12 of first bridge plug lower end The fishing neck 105 for the cage 1 held beyond the Great Wall above carries, and completes the deblocking of second bridge plug, is sequentially completed the salvaging of whole bridge plugs.
The fishing socket 12 that a bridge plug lower end is shown in Fig. 4 drags for the fishing neck 105 of next bridge plug upper end cage 1 The mated condition at position, at this time thimble 103 stretched out into pipe, ball 102 is lifted off ball seat, makes 6 circulation canal of central tube unimpeded, can With the turn on pump flushing bridge plug upper surface sand setting when continuing to salvage next bridge plug, fishing success ratio is improved.The fishing socket of bridge plug lower end 12 enter with coiled tubing well tool string band fishing socket specification it is consistent.
The embodiment of the utility model is described above in conjunction with attached drawing, but the utility model is not limited to The embodiment stated, above-mentioned embodiment is only schematical, rather than restricted, this area it is common Technical staff is not departing from the utility model aims and scope of the claimed protection situation under the enlightenment of the utility model Under, many forms can be also made, these are belonged within the protection of the utility model.

Claims (9)

  1. A kind of 1. staged fracturing bridge plug that can salvage recycling in batches, it is characterised in that including cage (1), lifting sub (2), Lock outer barrel (3), locking inner cylinder (4), locking pawl (5), central tube (6), packing element (7), packing element central tube (8), double grappling cards Watt (9), cone (10), slips spring (11) and fishing socket (12);
    The cage (1) is connected by screw thread with lifting sub (2), and lifting sub (2) passes through in unsealing pin (201) and locking Cylinder (4) connection, locking inner cylinder (4) are connected by locking pawl (5) with central tube (6), and central tube (6) passes through screw thread and fishing socket (12) connect, locking outer barrel (3) is connected by screw thread with packing element central tube (8), and the packing element (7) is sleeved on packing element central tube (8) Outside, packing element central tube (8) are connected by screw thread with cone (10), on the outside of the cone (10) the double grappling slips (9) of installation and Slips spring (11).
  2. 2. the staged fracturing bridge plug according to claim 1 that recycling can be salvaged in batches, it is characterised in that the cage (1) in be equipped with cage bar (101), central tube (6) as fluid passage ball (102), thimble (103), set pin hole (104) and Fishing neck (105), the cage bar (101) block ball (102), and the thimble (103) radially contacts with ball (102).
  3. 3. according to the staged fracturing bridge plug that can salvage recycling in batches described in claim 2, it is characterised in that locking inner cylinder (4) It is interior to be equipped with anti-retrogression tooth (401) and hook step (402).
  4. 4. according to the staged fracturing bridge plug that can salvage recycling in batches described in claim 3, it is characterised in that when for setting When, for setting tool by fixing cage (1) setting pin hole (104) installation and set pin, setting tool promotes locking outer Cylinder (3) downlink, with locking outer barrel (3) the packing element central tube (8) that is connected, the cone (10) being connected with packing element central tube (8) also with Downlink, cone (10) downlink releases bidirectionally anchoring slips (9), until bidirectionally anchoring slips (9) runs into casing wall and fixation, sits Envelope instrument continues to press on locking outer barrel (3) and causes packing element (7) to compress and expand, until be expanded into after the limit cannot be after for packing element (7) Continuous compression, setting tool can not continue to press on locking outer barrel (3) and cause to set pin cutting, be finally completed and set, lock outer barrel (3) it is connected between locking inner cylinder (4) by anti-retrogression tooth (401), makes locking outer barrel (3) can only be relative to locking inner cylinder (4) Moved axially from cage (1) to fishing socket (12).
  5. 5. according to the staged fracturing bridge plug that can salvage recycling in batches described in claim 3, it is characterised in that when for unsealing When, dipper (12) drags for fishing neck (105), drives cage (1) uplink, breaks deblocking pin (201), causes lifting sub (2) Separated with locking inner cylinder (4), continue above to carry fishing socket (12), drive lifting sub (2) uplink, cause lifting step (202) hook Locking inner cylinder (4) is tangled, while locking pawl (5) disengages, and causes locking inner cylinder (4) to be separated with central tube (6);Continue above to carry and beat Dipper (12), drives locking inner cylinder (4) uplink, causes hook step (402) to hook locking outer barrel (3), causes to lock outer barrel (3) packing element central tube (8) and cone (10) uplink are driven, bidirectionally anchoring slips (9) loses the support of cone (10), and in slips Spring is withdrawn under the action of (11), while packing element (7) loses the diminution recycling of support, is finally completed deblocking.
  6. 6. the staged fracturing bridge plug according to claim 5 that recycling can be salvaged in batches, it is characterised in that packing element central tube (8) fixed C rings (801) and corresponding C annular grooves are provided between central tube (6), after completing axial movement during deblocking, Gu Determine C rings (801) and be caught in corresponding C annular grooves, make packing element central tube (8) and central tube (6) mutually locking, it is impossible to moved to axial It is dynamic.
  7. 7. the staged fracturing bridge plug according to claim 2 that recycling can be salvaged in batches, it is characterised in that work as fishing socket (12) when entangling fishing neck (105) and above proposing deblocking, thimble (103) inwardly stretches out, and ball (102) is lifted off ball seat.
  8. 8. the staged fracturing bridge plug according to claim 2 that recycling can be salvaged in batches, it is characterised in that the fishing socket (12) end and the end of cage (1) are the slope with equal angular.
  9. 9. the staged fracturing bridge plug according to claim 1 that recycling can be salvaged in batches, it is characterised in that the central tube (6) it is used as fluid passage.
CN201721250925.7U 2017-09-27 2017-09-27 The staged fracturing bridge plug of recycling can be salvaged in batches Active CN207296955U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721250925.7U CN207296955U (en) 2017-09-27 2017-09-27 The staged fracturing bridge plug of recycling can be salvaged in batches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721250925.7U CN207296955U (en) 2017-09-27 2017-09-27 The staged fracturing bridge plug of recycling can be salvaged in batches

Publications (1)

Publication Number Publication Date
CN207296955U true CN207296955U (en) 2018-05-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110925490A (en) * 2019-11-29 2020-03-27 海洋石油工程股份有限公司 Submarine pipeline recovery tool control system and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110925490A (en) * 2019-11-29 2020-03-27 海洋石油工程股份有限公司 Submarine pipeline recovery tool control system and control method thereof
CN110925490B (en) * 2019-11-29 2021-11-02 海洋石油工程股份有限公司 Submarine pipeline recovery tool control system and control method thereof

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