CN204113261U - A kind of layered fracturing pipe string - Google Patents
A kind of layered fracturing pipe string Download PDFInfo
- Publication number
- CN204113261U CN204113261U CN201420562823.9U CN201420562823U CN204113261U CN 204113261 U CN204113261 U CN 204113261U CN 201420562823 U CN201420562823 U CN 201420562823U CN 204113261 U CN204113261 U CN 204113261U
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- Prior art keywords
- packer
- pipe string
- fracturing pipe
- connector
- tubing string
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Abstract
The utility model discloses a kind of layered fracturing pipe string, belong to oil exploitation underground construction apparatus field, comprise at least two-stage tubing string connected successively, every grade of tubing string is equipped with packer, be provided with deblocking releasing pup joint between adjacent packers, deblocking releasing pup joint comprises top connection, the overcoat of tubular, nut, connection pawl, piston, connector and central tube; Top connection, overcoat and nut connect successively, the one end connecting pawl is sleeved in top connection, the other end of connection pawl is the lock claw in contraction state, piston bush is contained in outside lock claw, piston clip is located between lock claw and overcoat and also and between top connection is kept at a certain distance away, and connects pawl and is connected by starting pin with between piston; One end of connector is connected in lock claw, one end of central tube is connected by pin of giving up with the other end of connector, and spiro cap is connected on the lateral wall of central tube, keeps at a certain distance away between connector and nut, alleviate the deblocking load of packer, unfreezing of can giving up step by step.
Description
Technical field
The utility model relates to oil, natural gas extraction underground construction equipment technical field, particularly a kind of layered fracturing pipe string.
Background technology
Domestic and international separate stratum fracfturing technology obtains since the last century and obtains significant progress; the selection of pressure break well type has developed into the directions such as high angle hole, extended reach well, horizontal well from straight well, and layered fracturing pipe string defines the types such as the protection of card envelope fracturing string, back-up sand (cementing plug or lower bridging plug) fracturing string, ball-off fracturing tubing string, two envelope drag fracturing tubing string and sleeve type multilevel hierarchy fracturing string gradually.
Current sleeve type multilevel hierarchy fracturing string is widely used at the scene, and the multiple-string packer of multilevel hierarchy fracturing string is deblocking or unfreezing together with entirety at deblocking in time meeting card.
Realizing in process of the present utility model, inventor finds that prior art at least exists following problem:
Due to the pit shaft axis substantial deviation vertical line of high angle hole, the duty of the downhole tool of separate stratum fracfturing is more severe than straight well, existing multilevel hierarchy fracturing string at deblocking with when meeting card owing to being that multiple-string packer entirety carries out deblocking releasing, the deblocking load of multiple-string packer, trip out load superposition, cause tubing string deblocking difficulty, to trip out load large, make tubing string not easily salvaged go out well.
Utility model content
In order to solve the problem of prior art, the utility model embodiment provides a kind of layered fracturing pipe string, and technical scheme is as follows:
The utility model embodiment provides a kind of layered fracturing pipe string, described layered fracturing pipe string comprises at least two-stage tubing string connected successively, every grade of tubing string is equipped with packer, be provided with deblocking releasing pup joint between two adjacent described packers, described deblocking releasing pup joint comprises top connection, the overcoat of tubular, nut, connection pawl, piston, connector and central tube;
Described top connection, described overcoat and described nut coaxially connect successively, and described connection pawl, described piston, described connector and described central tube are all arranged in described overcoat,
One end of described connection pawl is sleeved in described top connection, the other end of described connection pawl is the lock claw in contraction state, described piston bush is contained in outside described lock claw, gap is provided with between described connection pawl and described overcoat, described piston clip to be located between described lock claw and described overcoat and to be kept at a certain distance away with described top connection, and described connection pawl is connected by starting pin with between described piston;
One end of described connector is connected in described lock claw, the other end of described connector is connected by pin of giving up with one end of described central tube, described spiro cap is connected on the lateral wall of described central tube, be provided with gap between described central tube and described overcoat, described connector and described nut keep at a certain distance away.
Further, the one end in the close shaft bottom of described layered fracturing pipe string is provided with and sets sand blast sliding sleeve.
Further, the internal diameter of the sliding sleeve tee of multiple described packer increases one by one along shaft bottom to well head direction.
Further, a described packer near well head of described layered fracturing pipe string is Y341 type washing well hydraulic packer.
Further, the described packer at the middle part of described layered fracturing pipe string is Y241 type sleeve type hydraulic packer.
Further, a described packer near shaft bottom of described layered fracturing pipe string is Y241 type hydraulic packer.
Further, in described multistage tubing string, except the described tubing string near shaft bottom and the described tubing string near well head, every grade of described tubing string includes the packer, sand blower of sliding sleeve, hydraulic anchor and the deblocking releasing pup joint that connect successively.
Further, in described multistage tubing string, be provided with hydraulic safety connector near on the described tubing string of well head.
Further, hydraulic anchor is connected with between described hydraulic safety connector and described packer.
The beneficial effect of the technical scheme that the utility model embodiment provides is:
By arranging the layered fracturing pipe string of band multiple-string packer, deblocking releasing pup joint being set between packer, by pressurization along shaft bottom toward well head direction successively set packer, pitching can being equipped with simultaneously and building the pressure and realize the separate stratum fracfturing of tubing string; When starting pin and being cut off, top connection drive overcoat and nut can with central tube relative movement, distance between nut and connector is that the deblocking of packer provides enough strokes, alleviate the deblocking load of packer, when tubing string meets card, continuing upper lifting pipe post can cut off pin of giving up, and connector and central tube depart from realization and give up, what reduce tubing string trips out load, realizes segmental salvage and trips out tubing string.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of layered fracturing pipe string that the utility model embodiment provides;
Fig. 2 is the structural representation of the first deblocking releasing pup joint that the utility model embodiment provides.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment
See Fig. 1-2, the utility model embodiment provides a kind of layered fracturing pipe string, and layered fracturing pipe string comprises at least two-stage tubing string connected successively, and every grade of tubing string is equipped with packer 1, is provided with deblocking releasing pup joint 2 between two adjacent packers 1,
Deblocking releasing pup joint 2 comprises top connection 21, the overcoat 22 of tubular, nut 23, connection pawl 24, piston 25, connector 26 and central tube 27; Top connection 21, overcoat 22 and nut 23 coaxially connect successively, connect pawl 24, piston 25, connector 26 and central tube 27 and are all arranged in overcoat 22,
The one end connecting pawl 24 is sleeved in top connection 21, the other end of connection pawl 24 is the lock claw 24a in contraction state, piston 25 is sleeved on outside lock claw 24a, connect between pawl 24 and overcoat 22 and be provided with gap, piston 25 is located between lock claw 24a and overcoat 22 and also and between top connection 21 keeps at a certain distance away, and connects pawl 24 and is connected by starting pin 28 with between piston 25;
One end of connector 24 is connected in lock claw 24a, the other end of connector 26 is connected by pin 29 of giving up with one end of central tube 27, nut 23 is socketed on the lateral wall of central tube 27, is provided with gap between central tube 27 and overcoat 22, keeps at a certain distance away between connector 26 and nut 23.
Need after pressing crack construction completes each packer of deblocking and on mention fracturing string, between adjacent packer in prior art on layered fracturing pipe string, retractable member is not set, single-stage packer is made not have enough stroke space when deblocking, adjacent packer can be driven while deblocking to move, entirety deblocking together when finally can cause multiple-string packer deblocking, the very large unsealing operation of deblocking load is more difficult, and deblocking releasing pup joint 2 passes through hydraulic control in the present embodiment, the direction one-level of segmentation one-level successively deblocking packer 1 along well head toward shaft bottom, first squeeze into high-pressure fluid from well head, fluid enters the inside of the deblocking releasing pup joint 2 of first order tubing string from central tube 27 through tubing string, and be filled between piston 25 and connector 26, then promote piston 25 to move towards top connection 21, start pin 28 when fluid pressure raises and reaches setting value to be cut off, now connect the lock claw 24a of pawl 24 one end and lose the support of piston 25 and connector 26 departs from and unlocks, top connection 21 drives overcoat 22 and nut 23 and central tube 27 and connector 26 relative movement, distance between nut 23 and connector 21 is that the deblocking of the packer 1 of first order tubing string provides enough strokes, second level packer 1 is not driven while deblocking first order packer 1, alleviate the deblocking load of first order packer 1, after first order packer 1 deblocking completes, high-pressure fluid enters the inside of the deblocking releasing pup joint 2 of second level tubing string, assist the deblocking of second level packer 1, when there is multiple-string packer, can segmentation gradually deblocking.
When tubing string meets card, during upper lifting pipe post to trip out load very large, continue the pin 29 of giving up cutting off the deblocking releasing pup joint 2 in the first order tubing string when upper lifting pipe post reaches certain dynamics, now connector 26 and central tube 27 depart from and realize giving up of first order tubing string and then salvage part tubing string, next other downhole tools can be used to coordinate and to salvage second level tubing string, salvage again after the pin 29 of giving up of the deblocking releasing pup joint 2 of second level tubing string is cut off and trip out part tubing string, last segmental salvage one-level one-level successively trips out tubing string, whole layered fracturing pipe string segmentation is salvaged step by step, reduce meet card time trip out load.
Further, the one end in the close shaft bottom of this layered fracturing pipe string is provided with and sets sand blast sliding sleeve 3.
Particularly, set the position that sand blast sliding sleeve 3 is lowered into close artificial bottom of a well, when carrying out separate stratum fracfturing construction, first can beat hydraulic setting near the packer 1 setting sand blast sliding sleeve 3 to tubing string, controlling to set sand blast sliding sleeve 3 after continuing pressurization and first set then pressure break orlop.
Further, the internal diameter of the sliding sleeve tee of multiple packer 1 increases one by one along shaft bottom to well head direction.
Particularly, after the construction completing orlop fractured layer, next the feed pathway setting fluid course and this layer of sand blower of sliding sleeve 4 being opened the packer 1 toward upper level fractured layer by pitching is successively needed, the ball seat place that the club simultaneously dropped into drops on orlop packer 1 carries out shutoff, orlop pressure break passage is by after shutoff, the pressing crack construction of the corresponding fractured layer of sand blower of sliding sleeve 4 can be implemented, the internal diameter of the sliding sleeve tee of packer 1 should meet and reduces one by one toward bottom from upper strata, the convenient ball dropping into different size successively realizes the shutoff of corresponding fractured layer and the construction of next fractured layer.
Further, what a packer 1 near well head of this layered fracturing pipe string adopted is Y341 type washing well hydraulic packer.The packer 1 at the middle part of this layered fracturing pipe string is Y241 type sleeve type hydraulic packer.A packer 1 near shaft bottom of this layered fracturing pipe string is Y241 type hydraulic packer.
Particularly, in the present embodiment, packer 1 and kit thereof all adopt hydraulic control, mode is set relative to the machinery of Y221 packer conventional in prior art, carry out deep-well, high angle hole separate stratum fracfturing time setting force can efficiently transmit, reduce the risk setting failure, Y241 type packer belongs to comparatively ripe packer, set stabilization efficiency higher, Y341 type washing well hydraulic packer complete set after also possess auxiliary well-flushing function.
Further, in multistage tubing string, except the tubing string near shaft bottom and the tubing string near well head, every grade of tubing string includes the packer 1, sand blower of sliding sleeve 4, hydraulic anchor 5 and the deblocking releasing pup joint 2 that connect successively.
Particularly, in the present embodiment, sand blast sliding sleeve 3 is set near the tubing string in shaft bottom is provided with, the devices such as hydraulic safety connector are provided with near on the tubing string of well head, centre can arrange and multistagely comprise packer 1, deblocking releasing pup joint 2, sand blower of sliding sleeve 4, the tubing string of hydraulic anchor 5, during construction operation, squeeze into high-pressure fluid in the oil pipe of tubing string after, the anchor fluke of hydraulic anchor 5 can compress stage clip and external pressure spring in self under the effect of high pressure, anchor fluke is pushed to casing wall, finally be clamped on internal surface of sleeve pipe, the end thrust that tubing string produces in job execution is overcome with this, play the effect of one section of tubing string near fixing hydraulic anchor 5, after oil jacket pressure balance, the anchor fluke of hydraulic anchor 5 can be regained under self acting force of the spring, remove grappling.
Further, in multistage tubing string, be provided with hydraulic safety connector 6 near on the tubing string of well head.Hydraulic anchor 5 is connected with between hydraulic safety connector 6 and packer 1.
Particularly, hydraulic safety connector 6 is a kind of security tools being easy to dropout, make-up, the position that the needs being generally arranged on tubing string are thrown off, can moment of torsion be transmitted together with tubing string and bear various combined stresses, when breaking down in well, dropout, the make-up of the tubing string that fulfils assignment can be operated by well head.
A kind of layered fracturing pipe string that the utility model embodiment provides, by arranging the layered fracturing pipe string of band multiple-string packer, deblocking releasing pup joint is set between packer, by pressurization along shaft bottom toward well head direction successively set packer, pitching can be equipped with simultaneously and build the pressure and realize the separate stratum fracfturing of tubing string; When starting pin and being cut off, top connection drive overcoat and nut can with central tube relative movement, distance between nut and connector is that the deblocking of packer provides enough strokes, alleviate the deblocking load of packer, when tubing string meets card, continuing upper lifting pipe post can cut off pin of giving up, and connector and central tube depart from realization and give up, what reduce tubing string trips out load, realizes segmental salvage and trips out tubing string.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. a layered fracturing pipe string, described layered fracturing pipe string comprises at least two-stage tubing string connected successively, and every grade of tubing string is equipped with packer, it is characterized in that, is provided with deblocking releasing pup joint between two adjacent described packers,
Described deblocking releasing pup joint comprises top connection, the overcoat of tubular, nut, connection pawl, piston, connector and central tube;
Described top connection, described overcoat and described nut coaxially connect successively, and described connection pawl, described piston, described connector and described central tube are all arranged in described overcoat,
One end of described connection pawl is sleeved in described top connection, the other end of described connection pawl is the lock claw in contraction state, described piston bush is contained in outside described lock claw, gap is provided with between described connection pawl and described overcoat, described piston clip to be located between described lock claw and described overcoat and to be kept at a certain distance away with described top connection, and described connection pawl is connected by starting pin with between described piston;
One end of described connector is connected in described lock claw, the other end of described connector is connected by pin of giving up with one end of described central tube, described spiro cap is connected on the lateral wall of described central tube, be provided with gap between described central tube and described overcoat, described connector and described nut keep at a certain distance away.
2. layered fracturing pipe string according to claim 1, is characterized in that, the one end in the close shaft bottom of described layered fracturing pipe string is provided with and sets sand blast sliding sleeve.
3. layered fracturing pipe string according to claim 1, is characterized in that, the internal diameter of the sliding sleeve tee of multiple described packer increases one by one along shaft bottom to well head direction.
4. layered fracturing pipe string according to claim 3, is characterized in that, a described packer near well head of described layered fracturing pipe string is Y341 type washing well hydraulic packer.
5. layered fracturing pipe string according to claim 3, is characterized in that, the described packer at the middle part of described layered fracturing pipe string is Y241 type sleeve type hydraulic packer.
6. layered fracturing pipe string according to claim 3, is characterized in that, a described packer near shaft bottom of described layered fracturing pipe string is Y241 type hydraulic packer.
7. layered fracturing pipe string according to claim 1, it is characterized in that, in described multistage tubing string, except the described tubing string near shaft bottom and the described tubing string near well head, every grade of described tubing string includes the packer, sand blower of sliding sleeve, hydraulic anchor and the deblocking releasing pup joint that connect successively.
8. layered fracturing pipe string according to claim 7, is characterized in that, in described multistage tubing string, is provided with hydraulic safety connector near on the described tubing string of well head.
9. layered fracturing pipe string according to claim 8, is characterized in that, is connected with hydraulic anchor between described hydraulic safety connector and described packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420562823.9U CN204113261U (en) | 2014-09-28 | 2014-09-28 | A kind of layered fracturing pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420562823.9U CN204113261U (en) | 2014-09-28 | 2014-09-28 | A kind of layered fracturing pipe string |
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| Publication Number | Publication Date |
|---|---|
| CN204113261U true CN204113261U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420562823.9U Expired - Fee Related CN204113261U (en) | 2014-09-28 | 2014-09-28 | A kind of layered fracturing pipe string |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437664A (en) * | 2016-12-16 | 2017-02-22 | 华鼎鸿基石油工程技术(北京)有限公司 | Anti-erosion and no sand card fracturing sliding bush |
| CN106703706A (en) * | 2015-07-24 | 2017-05-24 | 中国石油天然气股份有限公司 | Injection and production tubing string and method thereof |
| CN107100572A (en) * | 2017-07-04 | 2017-08-29 | 唐山冀东石油机械有限责任公司 | Gradually deblocking is segmented releasing tool |
| CN108868673A (en) * | 2018-06-28 | 2018-11-23 | 唐山冀东石油机械有限责任公司 | Multiple-string packer Back-off Pipe String and its remove method |
| CN110145292A (en) * | 2019-05-18 | 2019-08-20 | 中国石油天然气股份有限公司 | A kind of elastic lock sleeve sanding machine |
| CN111927339A (en) * | 2020-09-06 | 2020-11-13 | 中国石油天然气集团有限公司 | Safety joint for staged fracturing pipe column |
-
2014
- 2014-09-28 CN CN201420562823.9U patent/CN204113261U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703706A (en) * | 2015-07-24 | 2017-05-24 | 中国石油天然气股份有限公司 | Injection and production tubing string and method thereof |
| CN106703706B (en) * | 2015-07-24 | 2018-11-16 | 中国石油天然气股份有限公司 | Injection-production column jacket and the method for using it |
| CN106437664A (en) * | 2016-12-16 | 2017-02-22 | 华鼎鸿基石油工程技术(北京)有限公司 | Anti-erosion and no sand card fracturing sliding bush |
| CN106437664B (en) * | 2016-12-16 | 2019-01-04 | 华鼎鸿基石油工程技术(北京)有限公司 | Fluid erosion prevention exempts from sand card fracturing sliding bush |
| CN107100572A (en) * | 2017-07-04 | 2017-08-29 | 唐山冀东石油机械有限责任公司 | Gradually deblocking is segmented releasing tool |
| CN108868673A (en) * | 2018-06-28 | 2018-11-23 | 唐山冀东石油机械有限责任公司 | Multiple-string packer Back-off Pipe String and its remove method |
| CN110145292A (en) * | 2019-05-18 | 2019-08-20 | 中国石油天然气股份有限公司 | A kind of elastic lock sleeve sanding machine |
| CN111927339A (en) * | 2020-09-06 | 2020-11-13 | 中国石油天然气集团有限公司 | Safety joint for staged fracturing pipe column |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 |