CN204899848U - Hollow bridging plug - Google Patents
Hollow bridging plug Download PDFInfo
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- CN204899848U CN204899848U CN201520624264.4U CN201520624264U CN204899848U CN 204899848 U CN204899848 U CN 204899848U CN 201520624264 U CN201520624264 U CN 201520624264U CN 204899848 U CN204899848 U CN 204899848U
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- sealed tube
- urceolus
- bridging plug
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Abstract
The utility model relates to a hollow bridging plug is applicable to the segmentation card shutoff water operation in the segmentation well completion later stage production process. This bridging plug includes top connection, urceolus and center tube, and suit sealing mechanism, anchoring mechanism and seat seal a mechanism to the support cover outside top -down below the urceolus in proper order. Still be equipped with the mechanism of giving up in the urceolus, the mechanism of giving up includes sealed tube, a tieback section of thick bamboo and the piston of giving up, in the top connection mediate excircle respectively with sealed tube and urceolus threaded connection, the lower part and the central pipe thread connection of a tieback section of thick bamboo fix a tieback section of thick bamboo and the piston of giving up at the annular space of top connection with the sealed tube, and the lower part of sealed tube is equipped with the top seal valve through the shear pin and is equipped with liquid flow hole's baffle in the installation of the below of top seal valve, it presses the hole all to be equipped with to pass on the body of sealed tube, a tieback section of thick bamboo, center tube and support cover. Simplified construction steps, the one set of hollow bridging plug can use many times repeatedly, has also reduced the operating cost, has apparent economic benefits and result of use.
Description
Technical field
The utility model belongs to down-hole segmentation card the envelope instrument, particularly a kind of hollow bridging plug of petroleum industry, is particularly useful for the segmentation water plugging operation in sectional well completion later stage manufacturing process.
Background technology
In the drilling process of oil field development, meet containing multiple oil reservoir with dissection if bored, during later stage completion, mostly adopt layering or sectional well completion, and in horizontal well development, for increasing drainage area, reduce crude oil flows to pit shaft resistance from stratum, general employing screen casing barefoot completion.When boring the fine and close interlayer of chance in oil reservoir, generally adopting disposed tubes external packer in the screen casing of fine and close interlayer position to divide two sections of completions, when the later stage produces, if an interval water outlet, just can seal water exit interval, continue another interval of exploitation, reduce moisture content.But in order to not reduce production capacity, often adopt and inject blocking agent at water exit interval, water blocking is lived and does not affect the output of oil, this just needs a kind of segmentation card to seal instrument, card is enclosed in the sleeve pipe in the middle of external packer of pipe, injects blocking agent separately, when the water outlet of cutting optimal section for water exit interval, card needs after being enclosed in the packer setting in sleeve pipe to keep being communicated with up and down, can inject blocking agent below packer by tubing string.
Existing packer generally adopts tubing string to be sent to card envelope position, and directly note blocking agent after set packer, after injection operation completes, removing seal for packer trips out outside pit shaft by upper lifting pipe post again.Also need to enter down a packer again when water outlet needs water blockoff again and carry out card envelope, or adopt the hollow bridging plug that can give up, give up after setting, insert sealing tubing string tieback again and carry out injecting construction, to construct rear proposition tieback string, hollow bridging plug has been stayed in well, facilitate next plug water construction.But existing hollow bridging plug bottom needs connection to suppress ball seat to be used, and more than ball seat forms seal cavity, by after making hydraulic setting packer again raised pressure destroy ball seat tubing string be communicated with up and down, trip out feeding tubing string after giving up.Because ball seat is in below hollow bridging plug, no matter note the normal production after blocking agent construction or the end of job, the existence of ball seat all substantially reduces interior latus rectum, causes harmful effect, if cannot carry out sand washing operation especially when bridging plug shakes out with lower layer section to injection operation and production.For addressing this problem, need a kind of hollow bridging plug need not suppressing ball seat.
Summary of the invention
The purpose of this utility model is to provide a kind of hollow bridging plug, is applied to the operation of segmentation water plugging, makes not use ball seat in water plugging tubing string, ensures to facilitate later stage operation and production by the interior latus rectum that tubing string is larger.
Technical solution of the present utility model is: a kind of hollow bridging plug comprises top connection, urceolus and central tube, support set is set with outside central tube, support set and urceolus are threaded connection, and are set with sealing mechanism, anchor mechanism and setting mechanism successively from top to bottom outside the support set below urceolus.In urceolus, also releasing gadget is housed, releasing gadget comprises sealed tube, tie-back sleeve and piston of giving up, and the inner circle of top connection and cylindrical are threaded with sealed tube and urceolus respectively; The bottom of tie-back sleeve is threaded with central tube, is fixed in the annular space of top connection and sealed tube by tie-back sleeve and piston of giving up, and the bottom of sealed tube is equipped with top seal valve by shear pin and is installed the baffle plate being provided with liquid flow hole in the below of top seal valve; The body of sealed tube, tie-back sleeve, central tube and support set is equipped with pressure transmission hole.
Compared with prior art, the beneficial effects of the utility model are:
do not need additional ball seat to coordinate when setting bridging plug, the sealing of upper space can be realized by sealed tube, for later stage operation retain larger in latus rectum, facilitate later stage operation and production;
the packing element of downforce further compression seal mechanism can be applied during hydraulic setting by transferring tubing string, improving sealing effectiveness;
pitching can beat hydraulic releasing after having set, also can give up by back-off if hydraulic releasing action is lost efficacy, and after having given up, again can carry out tieback sealing.Top connection of the present utility model can drive the parts such as the ball seat of sealed tube and bottom up and trip out pit shaft, stays the hollow bridging plug of well part to leave comparatively imperial palace latus rectum, is convenient to later stage job execution.Later stage injects blocking agent and enters Special seal intubate at present, insert in the tie-back sleeve of this hollow bridging plug and form sealing, blocking agent water blockoff can be injected with sub-surface to hollow bridging plug, propose sealing intubate after operation completes can directly go into operation, because hollow bridging plug provides larger oil flow channel, greatly reduce the impact on output.Again can enter seal down intubate when again needing water blockoff and carry out operation, simplify construction sequence, a set of hollow bridging plug can Reusability repeatedly, also reduce operating cost, there is significant economic benefit and result of use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing in detail the utility model is described in detail, see Fig. 1, a kind of hollow bridging plug comprises top connection 1, urceolus 6 and central tube 9, support set 11 is set with outside central tube 9, support set 11 and urceolus 6 are threaded connection, outside the support set 11 of urceolus less than 6, be set with sealing mechanism, anchor mechanism and setting mechanism successively from top to bottom.In urceolus 6, also releasing gadget is housed, releasing gadget comprises sealed tube 2, tie-back sleeve 4 and piston 5 of giving up, and the inner circle of top connection 1 and cylindrical are threaded with sealed tube 2 and urceolus 6 respectively; The bottom of tie-back sleeve 4 is threaded with central tube 9, tie-back sleeve 4 and piston 5 of giving up are fixed in annular space that top connection 1 and sealed tube 2 formed, the bottom of sealed tube 2 is equipped with top seal valve by shear pin 7 and is installed the baffle plate 25 being provided with liquid flow hole in the below of top seal valve; The body of sealed tube 2, tie-back sleeve 4, central tube 9 and support set 11 is equipped with pressure transmission hole.Top seal valve comprises valve ball 26, ball seat 24 and kick back 23, and ball seat 24 is fixed by shear pin 7 and sealed tube 2, and valve ball 26 is loaded in ball seat 24, and kick back 23 is provided with liquid flow hole, is fixed on the upper surface of ball seat 24.Sealed tube 2 above kick back 23 is provided with pressure transmission hole, and this pressure transmission hole is corresponding with the pressure transmission hole on central tube 9 top to be arranged.The top of sealed tube 2 is provided with taper inner circle and coordinates with setting ball 3, and the inner circle of the sealed tube 2 below top seal valve is greater than the inner circle of top.The top of sealed tube 2, body above tie-back sleeve 4 are provided with pressure transmission hole, and this pressure transmission hole is corresponding with the annular space above piston 5 of giving up, and makes can act on from the workover fluid in oil pipe to give up on the stressed end face of piston 5.The top inner circle of piston 5 of giving up matches with tie-back sleeve 4 top cylindrical step, the lower outer diameter of piston 5 of giving up is less than top external diameter, annular space is formed between urceolus 6 and tie-back sleeve 4, make this annular space corresponding with the pressure transmission hole of tie-back sleeve 4 bottom, the lower body of piston 5 of giving up and tie-back sleeve 4 are fixed by shear pin 7.When piston 5 of giving up is struck off, the workover fluid below piston 5 of giving up discharges from above-mentioned pressure transmission hole, and unlikely formation confined space is conducive to the descending smoothly of piston 5 of giving up like this.The upper portion central hole of top connection 1 is threaded with sealed tube 2, and lower body is provided with back-off screw thread and vertical slot, and this back-off screw thread is connected with urceolus 6.The vertical slot of top connection 1 bottom makes the lower body of top connection 1 become claw-like structures, has elasticity.The claw-like structures of top connection 1 is supported on the inwall of urceolus 6 by piston 5 of giving up, and can be given up by down-hole string back-off herein, and convenient top connection 1 and the sealed tube 2 be attached thereto thereof and top seal valve is proposed ground.
In the middle part of support set 11, be set with anchor mechanism, the epicone 13 in anchor mechanism is threaded with pressure cap 12.Support set 11 between pressure cap 12 and urceolus 6 is set with packing element 10, forms the sealing mechanism of this bridging plug.Anchor mechanism mainly comprises slip sleeve 14, slips 15, spring leaf 16, epicone 13, lower cone 17, epicone 13 and lower cone 17 are all sleeved on support set 11, slip sleeve 14 to be sleeved on outside epicone 13 and lower cone 17 and to be fixed by shear pin 7 with lower cone 17, beyond the taper surface of epicone 13 and lower cone 17 and slip sleeve 14 inner space slips 15 is installed, groove is provided with in the middle of the tooth body of slips 15, place spring leaf 16, slips 15 stretches out from the axial vertical slot of slip sleeve 14, spring leaf 16 is positioned between slips 15 and slip sleeve 14, be convenient to slips 15 when bridging plug deblocking and return original position.Lower cone 17 bottom cylindrical has been threaded connection fluid cylinder cover 18, installs lock sleeve 21 between fluid cylinder cover 18 and support set 11, and lock sleeve 21 also forms hydraulic cavities with the step of lower cone 17 herein by shear pin 7 is fixing, constitutes hydraulic setting mechanism.?
aforementionedthe support set 11 of hydraulic cavities correspondence position is provided with pressure transmission hole 19, and the fluid course that fluid pressure can be formed from the outer round recessed of central tube 9 and support set 11 inwall is delivered to this hydraulic cavities and implements to set action.Lock sleeve 21 inwall is provided with groove, coordinates with lock dog 20, and lock dog 20 is arranged in the square opening of support set 11 bottom circumference distribution, and lock sleeve 21 is fixed by lock dog 20 with support set 11, prevents two relative movement before bridging plug deblocking; The cylindrical of lock sleeve 21 is provided with locking screw, and fluid cylinder overlaps in 18 bottom inner circles and is provided with groove, places retaining ring 22, and when bridging plug sets, retaining ring 22 can coordinate with locking screw the relative displacement produced is locked.The lower connector of lock sleeve 21 is provided with screw thread, can connect other downhole tools or oil pipe use; Support set 11 is fixed by shear pin 7 with central tube 9, prevents two relative movement before bridging plug deblocking; Each junction and hydraulic mechanism need sealing place to be all designed with sealing ring 8 to seal.
During the assembling of this hollow bridging plug, the setting ball 3 of giving up is not installed, card envelope position is delivered to by the top connection 1 of drilling rod or oil pipe connection hollow bridging plug during use, then hydraulic pressure is beaten in tubing string, the ball seat 24 installed in sealed tube 2 coordinates with preassembled valve ball 26 and forms top seal space, and hydraulic pressure is passed to pressure transmission hole 19 below support set 11 by the pressure transmission hole of kick back 23 upper seal pipe 2 through the annular space between central tube 9 and support set 11.Hydraulic action is on the hydraulic pressure stress surface be made up of inside and outside two seals circle 8 of lower cone 17, and under hydraulic drive, cone 17 is up, and cut off the shear pin 7 fixing with lock sleeve 21 and the shear pin 7 fixing with slip sleeve 14 respectively, lower cone 17 continues up.Slips 15 is compression spring leaf 16 and protruding under the conical surface of lower cone 17 supports, be anchored on internal surface of sleeve pipe, hydraulic pressure also acts on the hydraulic pressure stress surface of lock sleeve 21 simultaneously, make its counter motion, lock sleeve 21 is fixed together by lock dog 20 and support set 11, drives support set 11 to move downward.Support set 11 drives urceolus 6 extruding packing element 10 downwards, meanwhile packing element 10 presses down pressure cap 12 and promotes the epicone that is attached thereto 13 times top slips 15 and increase anchorage force, because set the parts such as process support set 11, urceolus 6 all will move down, so need to transfer feeding tubing string, if hydraulic setting power is inadequate, can also transfer tubing string and continue pressurization, compression packing element 10 improves sealing effectiveness further.The compression process of packing element 10 and the process that sets of setting mechanism make fluid cylinder overlap 18 and produce relative displacement with lock sleeve 21, and this displacement is locked on the locking screw of lock sleeve 21 by the retaining ring 22 that fluid cylinder overlaps 18 bottoms, prevents packing element 10 resilience.The process of setting completes and follow-up continuing is increased to design pressure, shear pin 7 on ball seat 24 is cut off descending, drops on baffle plate 25, make sealed tube 2 become large with the circular gap of ball seat 24, for action of giving up provides hydraulic pressure current by pass, the piston 5 that makes to give up can be destroyed and descending smoothly.Drop into when giving up in taper inner circle that setting ball 3 makes it to be seated at sealed tube 2 top and form sealing.Be provided with pressure transmission hole in the above position of taper inner circle, by this pressure transmission hole pressure reached when beating hydraulic releasing and give up on the hydraulic action face of piston 5, arrive design give up pressure time, it is descending that piston 5 of giving up cuts off shear pin 7.The claw-like structures of top connection 1 bottom loses support, can propose smoothly because it has elasticity during upper lifting pipe post, top connection 1 drives the parts such as the ball seat 24 of sealed tube 2 and bottom up and trips out pit shaft, stays the hollow bridging plug of well part to leave comparatively imperial palace latus rectum, is convenient to later stage job execution.Later stage injects blocking agent and enters Special seal intubate at present, insert in the tie-back sleeve 4 of this hollow bridging plug and form sealing, blocking agent water blockoff can be injected with sub-surface to hollow bridging plug, propose sealing intubate after operation completes can directly go into operation, because hollow bridging plug provides larger oil flow channel, greatly reduce the impact on output.Again can enter seal down intubate when again needing water blockoff and carry out operation, simplify construction sequence, a set of hollow bridging plug can Reusability repeatedly, also reduce operating cost; When the sealing mechanism of hollow bridging plug lost efficacy, can enter fishing tool below and drag on after tie-back sleeve 4 and carry, tie-back sleeve 4 drove central tube 9 up, cut off central tube 9 and the shear pin 7 that support set 11 coordinates.After central tube 9 is up, the outer groove of bottom cylindrical design is just in time relative with lock dog 20, lock dog 20 can enter outer groove, releasing support set 11 is fixing with lock sleeve 21, when central tube 9 is up top cylindrical step on push up the inner circle step of urceolus 6, urceolus 6 takes each mechanism of bottom out of pit shaft smoothly by support set 11, completes the deblocking of hollow bridging plug.
The use step of this hollow bridging plug is:
A, with oil pipe or drilling rod, hollow bridging plug is sent into downhole designs position;
In b, raising tubing string, hydraulic coupling reaches the design load of hollow bridging plug setting force;
C, maintenance or the hydraulic coupling reduced in tubing string, but the hydraulic coupling that should ensure in tubing string is greater than the hydraulic coupling in oil jacket annular space;
D, from well head transfer send into tubing string load mechanical force to hollow bridging plug, improve sealing effectiveness;
E, rising hydraulic coupling, destroy ball seat 24, shed the hydraulic coupling in tubing string, drop into setting ball 3 from oil pipe;
In f, raising tubing string, hydraulic coupling reaches the pressure of giving up of hollow bridging plug;
G, giving up successfully trips out feeding tubing string;
H, under enter to seal tieback string, with lower floor position, injecting construction is implemented to this bridging plug.
Claims (7)
1. a hollow bridging plug, comprise top connection, urceolus and central tube, support set is set with outside central tube, support set and urceolus are threaded connection, be set with sealing mechanism, anchor mechanism and setting mechanism successively from top to bottom outside support set below urceolus, it is characterized in that, in urceolus, also releasing gadget is housed, releasing gadget comprises sealed tube, tie-back sleeve and piston of giving up, and the inner circle of top connection and cylindrical are threaded with sealed tube and urceolus respectively; The bottom of tie-back sleeve is threaded with central tube, is fixed in the annular space of top connection and sealed tube by tie-back sleeve and piston of giving up, and the bottom of sealed tube is equipped with top seal valve by shear pin and is installed the baffle plate being provided with liquid flow hole in the below of top seal valve; The body of sealed tube, tie-back sleeve, central tube and support set is equipped with pressure transmission hole.
2. a kind of hollow bridging plug as claimed in claim 1, is characterized in that, described top seal valve comprises valve ball, ball seat and kick back, and ball seat is fixed by shear pin and sealed tube, and valve ball is loaded in ball seat, and kick back is provided with liquid flow hole, is fixed on the upper surface of ball seat.
3. a kind of hollow bridging plug as claimed in claim 2, is characterized in that, the sealed tube above described kick back is provided with pressure transmission hole, and this pressure transmission hole is corresponding with the pressure transmission hole on central tube top to be arranged.
4. a kind of hollow bridging plug as claimed in claim 2, is characterized in that, the top of described sealed tube is provided with taper inner circle and coordinates with setting ball, and the inner circle of the sealed tube below top seal valve is greater than the inner circle of top.
5. a kind of hollow bridging plug as claimed in claim 1, is characterized in that, the top of sealed tube, body above tie-back sleeve are provided with described pressure transmission hole, and this pressure transmission hole is corresponding with the annular space above piston of giving up.
6. a kind of hollow bridging plug as claimed in claim 5, it is characterized in that, the top inner circle of described piston of giving up matches with tie-back sleeve top cylindrical step, the lower outer diameter of piston of giving up is less than top external diameter, annular space is formed between urceolus and tie-back sleeve, make this annular space corresponding with the pressure transmission hole of tie-back sleeve bottom, the lower body of piston of giving up and tie-back sleeve are fixed by shear pin.
7. a kind of hollow bridging plug as claimed in claim 6, is characterized in that, the upper portion central hole of described top connection is threaded with sealed tube, and lower body is provided with back-off screw thread and vertical slot, and this back-off screw thread is connected with urceolus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520624264.4U CN204899848U (en) | 2015-08-19 | 2015-08-19 | Hollow bridging plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520624264.4U CN204899848U (en) | 2015-08-19 | 2015-08-19 | Hollow bridging plug |
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| CN204899848U true CN204899848U (en) | 2015-12-23 |
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| CN201520624264.4U Active CN204899848U (en) | 2015-08-19 | 2015-08-19 | Hollow bridging plug |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013190A (en) * | 2017-06-03 | 2017-08-04 | 中国石油化工股份有限公司 | Steam flooding well flow string and implementation |
| WO2018000815A1 (en) * | 2016-06-30 | 2018-01-04 | 万瑞（北京）科技有限公司 | Cable bridge plug setting and sealing tool |
| CN114991708A (en) * | 2022-05-30 | 2022-09-02 | 盐城他山石液压机械有限公司 | Anti-loosening self-locking bridge plug |
-
2015
- 2015-08-19 CN CN201520624264.4U patent/CN204899848U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018000815A1 (en) * | 2016-06-30 | 2018-01-04 | 万瑞（北京）科技有限公司 | Cable bridge plug setting and sealing tool |
| CN107558949A (en) * | 2016-06-30 | 2018-01-09 | 万瑞（北京）科技有限公司 | A kind of electric cable bridge plug setting tool |
| US11091976B2 (en) | 2016-06-30 | 2021-08-17 | Wellray Technologies Co., Ltd. | Setting tool for setting bridge plug |
| CN107558949B (en) * | 2016-06-30 | 2023-07-11 | 万瑞（北京）科技有限公司 | Cable bridge plug setting tool |
| CN107013190A (en) * | 2017-06-03 | 2017-08-04 | 中国石油化工股份有限公司 | Steam flooding well flow string and implementation |
| CN114991708A (en) * | 2022-05-30 | 2022-09-02 | 盐城他山石液压机械有限公司 | Anti-loosening self-locking bridge plug |
| CN114991708B (en) * | 2022-05-30 | 2023-09-12 | 盐城他山石液压机械有限公司 | Locking auto-lock bridging plug that moves |
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