CN204960825U - Hydraulic pressure release sub - Google Patents
Hydraulic pressure release sub Download PDFInfo
- Publication number
- CN204960825U CN204960825U CN201520731178.3U CN201520731178U CN204960825U CN 204960825 U CN204960825 U CN 204960825U CN 201520731178 U CN201520731178 U CN 201520731178U CN 204960825 U CN204960825 U CN 204960825U
- Authority
- CN
- China
- Prior art keywords
- central tube
- piston bush
- center tube
- snap ring
- hydraulic release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 210000000078 claw Anatomy 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The utility model relates to an oil field oil recovery downhole tool technical field, in particular to hydraulic pressure release sub, including top connection, center tube, lower clutch, top connection, center tube, lower clutch connect gradually, the outside tertiary step form that is of center tube, center tube hypomere inner wall sets up the boss, and open along the circumference in the center tube middle section has radial hole, and the center tube lower extreme is opened along the axial has a plurality of logical grooves, and the piston bush suit is outside at the center tube, and the piston bush inner wall has the step hole that corresponds with center tube middle section and hypomere, and in the piston bush upper portion installation shear pin, the lower extreme is located the circumference inslot that opened on center tube upper portion, and open along the circumference piston bush lower part has radial hole, the snap ring presses cap and piston bush upper end to be connected, places the snap ring inside the snap ring pressure cap. The utility model provides a hydraulic pressure release sub, it is can implementation structure simple, convenient operation, the process of going into the well safety need not batted, and oil pipe directly suppresses and gives up, and it is reliable to give up, and it is low to put pressure aside, simplifies the borehole operation operation, improves the operating efficiency.
Description
Technical field
The utility model relates to oil extraction in oil field down-hole technical field of tools, particularly a kind of hydraulic release joint.
Background technology
Card water plugging string of giving up is the split type separate-layer production string of one that oil field generally adopts.The formation of card water plugging string of giving up is generally hydraulic packer bottom and connects setting ball seat, and top connects back-off sub.Field operation step is: the blocking hydromining tubing string of giving up connected is lowered into design attitude, by the set packer Seal Oil cover annular space that builds the pressure in oil pipe, thus realizes exploitation and the shutoff of oil reservoir, continuing to suppress to opening setting ball seat, being communicated with producing zone.Drop into the steel ball of back-off sub, be seated on the conical surface on back-off sub top, suppress in oil pipe, cut off shear pin of giving up, destroy back-off sub fuse, realize giving up, then, mention the top tubing string that to give up.There is following problem in the back-off sub generally adopted now: the first, and when packer lower layer position is high pressure zone, when setting ball seat can not be opened, on-the-spot meeting is abandoned opening setting ball seat, directly drops into the steel ball of back-off sub, suppress and give up.Now, can cause and build the pressure between setting ball seat and back-off sub, tubing pressure needs to cut off shear pin of giving up on the basis of this pressure of balance, and cause pressure of giving up excessive, oil pipe bears high pressure, even possibly cannot realize normally giving up.The second, oil pipe dirt can drop on the conical surface on back-off sub top sometimes, and the steel ball of back-off sub and the conical surface cannot be sealed completely, cannot realize building the pressure in oil pipe, causing oil pipe to be suppressed can not cut off shear pin of giving up, and can not realize normally giving up.When can not normally give up, tubing string in well can only be tripped out, again enter new flow string down, both waste the downhole tools such as packer like this, substantially increase operating cost again, add the operation intensity of workman.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, and provide a kind of easy to operate, process safety of going into the well, does not need pitching, and oil pipe is directly suppressed and given up, and gives up reliable, puts a kind of hydraulic release joint that pressure is low aside.
The technical solution of the utility model is:
A kind of hydraulic release joint, comprise top connection, central tube, lower contact, top connection, central tube, lower contact connect successively, described central tube outside be three grades step-like, central tube hypomere inwall arranges boss, and central tube stage casing circumferentially has radial hole, and central tube lower end edge axially has some grooves, make central tube lower end be divided into several lobe, become elastic claw; Piston bush is sleeved on central tube outside, piston bush inwall has the stepped hole corresponding with central tube stage casing and hypomere, and piston bush top radially has screwed hole, and shear pin is arranged in the screwed hole of piston bush, lower end is positioned at the circumferential slot that central tube top is left, and piston bush bottom circumferentially has radial hole; Snap ring pressure cap is connected with piston bush upper end, and snap ring is placed in snap ring pressure cap inside.
The external diameter of described lower contact one is greater than the external diameter of piston bush.
Described top connection is threaded with central tube, and fixes with anti-turn screw.
Described central tube at least has an O ring recess respectively with below above radial hole, and an O-ring seals is housed in each O ring recess.
Described snap ring circumference is slotted, and snap ring internal diameter is less than central tube epimere external diameter.
The hydraulic release joint that the utility model provides, can realize structure simple, easy to operate, process safety of going into the well, do not need pitching, oil pipe is directly suppressed and is given up, and gives up reliable, puts pressure aside low, simplify underground work operation, improve operating efficiency, also greatly saved cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model detailed description of the invention.
The structural representation of pipe centered by Fig. 2.
Fig. 3 is the structural representation of snap ring.
1 top connection 2O shape sealing ring 3 anti-turn screw 4 central tube 5 snap ring pressure cap 6 snap ring 7 shear pin 8O shape sealing ring 9 piston bush 10O shape sealing ring 11O shape sealing ring 12 lower contact 401 elastic claw.
Detailed description of the invention
A kind of hydraulic release joint, comprise top connection 1, central tube 4, lower contact 12, top connection 1, central tube 4, lower contact 12 are threaded successively, and top connection 1 is fixed with central tube 4 anti-turn screw 3.
Described central tube 4 outside be three grades step-like, central tube 4 hypomere inwall arranges boss, central tube 4 stage casing circumferentially has radial hole, central tube 4 at least has an O ring recess respectively with below above radial hole, an O-ring seals 8 is housed in each O ring recess, screw thread place, central tube 4 lower end has some grooves vertically, makes central tube 4 punish into several lobe at screw thread, becomes elastic claw 401.
It is outside that piston bush 9 is sleeved on central tube 4, the external diameter that lower contact is 12 1 is greater than the external diameter of piston bush 9, piston bush 9 inwall has the stepped hole corresponding with central tube 4 stage casing and hypomere, piston bush 9 top radially has screwed hole, shear pin 7 is arranged in the screwed hole of piston bush 9, lower end is positioned at the circumferential slot that central tube 4 top is left, and piston bush 9 bottom circumferentially has radial hole; Snap ring 6 pressure cap 5 is connected with piston bush 9 upper end, and snap ring 6 is placed in snap ring 6 pressure cap 5 inside, and the upper fluting of described snap ring 6 circumference, snap ring 6 internal diameter is less than central tube 4 epimere external diameter.
Specific works principle of the present utility model is:
Go into the well: this hydraulic release joint is generally used in the producing well that packer bottom is high pressure zone.When going into the well, hydraulic packer bottom connects setting ball seat, and top connects hydraulic release joint; Go into the well in process, because lower contact 12 1 is more bigger than the external diameter of piston bush 9, there is crashproof effect, when sleeve pipe has distortion or necking down, piston bush 9 can not be bumped against, prevent hydraulic release joint from surprisingly giving up in advance; Meet special circumstances when needing upper lifting pipe post, because piston bush 9 outer steps that step is corresponding to central tube 4 close to the inner portion realizes axial location, when sleeve pipe has distortion or necking down, can not cause piston bush 9 and central tube 4 that relative motion occurs, shear pin 7 can not surprisingly be cut off, and prevents hydraulic release joint from surprisingly giving up in advance; Meanwhile, the step of piston bush 9 foot is pressed in elastic claw 401 place of central tube 4 bottom, radial spacing to elastic claw 401, keeps the normal connection of this place's screw thread, and unexpected in advance giving up can not occur.
Set packer with give up: blocking of will giving up hydromining tubing string is lowered into design attitude, and by the set packer that builds the pressure in oil pipe, Seal Oil overlaps annular space, thus realizes exploitation and the shutoff of oil reservoir; Do not need pitching, continue oil pipe to suppress, highly pressurised liquid enters the inner chamber of piston bush 9 through the radial hole of central tube 4, cut off shear pin 7, promotion snap ring pressure cap 5, snap ring 6, piston bush 9 are up, when tubing pressure bust and sleeve pipe returns water in a large number time, prove that the radial hole of piston bush 9 is communicated with the radial hole of central tube 4, given up; Now, snap ring 6 moves to central tube 4 epimere, and snap ring 6 bounces back, and is stuck on the step of central tube 4, prevents oil pipe pressure release back piston from overlapping 9 understanding outer descending; Meanwhile, elastic claw 401 place of central tube 4 bottom is left in piston bush 9 bottom, loses radial spacing to elastic claw 401; Now upper lifting pipe post, elastic claw 401 radial direction flicks, and central tube 4 loses with lower contact 12 and is threaded, and can trip out top tubing string of giving up, and lower contact 12 is stayed in well together with blocking hydromining tubing string of giving up.
Salvage: if need to trip out blocking hydromining tubing string of giving up, slide block is dragged for the lower contact less than 12 that anchor is lowered into hydraulic release joint, drag for Back-off Pipe String, upper lifting pipe post deblocking, can trip out tubing string in well.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (5)
1. a hydraulic release joint, comprise top connection, central tube, lower contact, top connection, central tube, lower contact connect successively, it is characterized in that, described central tube outside be three grades step-like, central tube hypomere inwall arranges boss, central tube stage casing circumferentially has radial hole, central tube lower end edge axially has some grooves, makes central tube lower end be divided into several lobe, becomes elastic claw; Piston bush is sleeved on central tube outside, piston bush inwall has the stepped hole corresponding with central tube stage casing and hypomere, and piston bush top radially has screwed hole, and shear pin is arranged in the screwed hole of piston bush, lower end is positioned at the circumferential slot that central tube top is left, and piston bush bottom circumferentially has radial hole; Snap ring pressure cap is connected with piston bush upper end, and snap ring is placed in snap ring pressure cap inside.
2. a kind of hydraulic release joint according to claim 1, it is characterized in that, the external diameter of described lower contact one is greater than the external diameter of piston bush.
3. a kind of hydraulic release joint according to claim 1, it is characterized in that, described top connection is threaded with central tube, and fixes with anti-turn screw.
4. a kind of hydraulic release joint according to claim 1, it is characterized in that, described central tube at least has an O ring recess respectively with below above radial hole, and an O-ring seals is housed in each O ring recess.
5. a kind of hydraulic release joint according to claim 1, it is characterized in that, described snap ring circumference is slotted, snap ring internal diameter is less than central tube epimere external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520731178.3U CN204960825U (en) | 2015-09-21 | 2015-09-21 | Hydraulic pressure release sub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520731178.3U CN204960825U (en) | 2015-09-21 | 2015-09-21 | Hydraulic pressure release sub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204960825U true CN204960825U (en) | 2016-01-13 |
Family
ID=55055898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520731178.3U Expired - Fee Related CN204960825U (en) | 2015-09-21 | 2015-09-21 | Hydraulic pressure release sub |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204960825U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019159A (en) * | 2016-11-04 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Mechanical back-off sub |
| CN109707424A (en) * | 2019-02-25 | 2019-05-03 | 河南省交通规划设计研究院股份有限公司 | A kind of flexible self-anchored type prestressed anchor of the anti-hook of band |
| CN118049161A (en) * | 2024-02-22 | 2024-05-17 | 盐城市弘通石油机械有限公司 | Easy and simple to handle's safe release connector |
-
2015
- 2015-09-21 CN CN201520731178.3U patent/CN204960825U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019159A (en) * | 2016-11-04 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Mechanical back-off sub |
| CN109707424A (en) * | 2019-02-25 | 2019-05-03 | 河南省交通规划设计研究院股份有限公司 | A kind of flexible self-anchored type prestressed anchor of the anti-hook of band |
| CN109707424B (en) * | 2019-02-25 | 2024-02-23 | 河南省交通规划设计研究院股份有限公司 | Flexible self-anchored prestressed anchor rod with reverse hook claw |
| CN118049161A (en) * | 2024-02-22 | 2024-05-17 | 盐城市弘通石油机械有限公司 | Easy and simple to handle's safe release connector |
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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 |
Granted publication date: 20160113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |