CN202441295U - Safety pressure relief device for pipe column - Google Patents
Safety pressure relief device for pipe column Download PDFInfo
- Publication number
- CN202441295U CN202441295U CN2012200672787U CN201220067278U CN202441295U CN 202441295 U CN202441295 U CN 202441295U CN 2012200672787 U CN2012200672787 U CN 2012200672787U CN 201220067278 U CN201220067278 U CN 201220067278U CN 202441295 U CN202441295 U CN 202441295U
- Authority
- CN
- China
- Prior art keywords
- central tube
- tube
- pressure relief
- tubing string
- lock ring
- 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
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 210000003456 pulmonary alveoli Anatomy 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract 1
- 238000010008 shearing Methods 0.000 abstract 1
- 241000251468 Actinopterygii Species 0.000 description 16
- 239000012530 fluid Substances 0.000 description 12
- 239000004576 sand Substances 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides a safe pressure relief device for a pipe column, include the interior center tube, outer center tube and the outer tube that establish that overlap from interior to exterior in proper order, set up the interior guide hole that communicates each other, outer pressure guide hole on the lateral wall of interior center tube and outer center tube, then be formed with the annular space between outer center tube and the outer tube, the pressure release hole on the outer tube lateral wall communicates with outer pressure guide hole through the annular space, the upper end of outer center tube is internal to connect and is connect the top connection, and be equipped with connecting portion to the evagination, connecting portion contact with the inner wall of outer tube, and fix mutually with the outer tube through shearing pin, the lower extreme of interior center tube is; the upper end of the outer sleeve is provided with a sleeve part which is inwards protruded, the sleeve part is correspondingly sleeved on the outer surface of the upper joint and has a distance with the upper end of the outer central pipe along the axial direction, and the lower end of the outer sleeve is in threaded connection with the outer surface of the lower joint. The utility model discloses when salvaging the tubular column and carrying out hydraulic lifting, can cooperate and carry out to suppress repeatedly many times and release the card, the pressure release is separated the anchor, has overcome prior art's defect.
Description
Technical field
The utility model relates to the instrument of the auxiliary fishing string pressure release in a kind of down-hole, and especially a kind of fishing string that is used for carries out the fluid power unfreezing, salvages the tubing string safe pressure relief device of well workover fish process in the down-hole.
Background technology
In the middle and later periods of oil field development; Phenomenons such as sand production in oil, cover change are on the rise; During the oil-water well well workover, jam accidents such as downhole tool or tubing string are also more and more general, particularly production accident such as card tubing string etc. usually occurs because of pressure break, sand washing etc. in the horizontal well well workover process; Because the special casing programme of horizontal well increases horizontal well well workover difficulty.At present; The mode that generally adopts is to be lowered to fishing string end-on card downhole tool in the down-hole or to meet card tubing string fish and carry out fluid power and lift; Through suppressing the effect that reaches the down-hole reinforcement; To carry out unfreezing fishing, wherein, this fishing string includes fluid power release device, anchoring device, pressure relief device and drags for lance and pressure relief device etc.Yet because the middle and later periods of oil field development, formation pressure is lower; After adopting down-hole fluid power to lift mode unfreezing, salvaging; Head of liquid is higher in the fishing string, and oil jacket pressure is difficult to balance, and the Hydraulic Anchorage device difficult on the fishing string is disanchored; When the bottom is met the card instrument or met the unfreezing of card tubing string fish, brought new anchor jam problem again.
In order to address this problem, usually used the hydraulic pressure ball seat as pressure relief device in the past, after the unfreezing in fishing string pitching suppress; Destroy ball seat and realize that oil jacket is communicated with; But this method only is applicable to unfreezing, the salvaging of general downhole tool, and for meeting the card downhole tool or meeting the soft card problems such as sand card of blocking the tubing string fish; Because needs repeatedly suppressed unfreezing repeatedly, pressure release is disanchored and could be realized the fish unfreezing, this ball seat pressure release mode just can't satisfy the scene and separate card request.
Because the defective that last known technology exists, the design people works out a kind of tubing string safe pressure relief device of the utility model according to the production design experiences of being engaged in this area and association area for many years.
The utility model content
The purpose of the utility model is to be to provide a kind of tubing string safe pressure relief device; It carries out fluid power when lifting at fishing string; The ability cooperation is repeatedly suppressed unfreezing repeatedly, pressure release is disanchored; To realize fishing string at downhole tool or the unfreezing when meeting card tubing string fish, overcome the defective of prior art in soft cards such as sand cards.
For this reason; The utility model proposes a kind of tubing string safe pressure relief device, and it includes a sheathed successively from the inside to the outside inner central tube, an exterior central tube and an outer tube, the corresponding interior guide hole that is interconnected, the outer pressure guide hole of offering on the sidewall of said inner central tube and exterior central tube; Then be formed with annular space between the external surface of said exterior central tube and the inwall of said outer tube; The relief hole of offering on the said outer tube sidewall is connected with the outer pressure guide hole of said exterior central tube through said annular space, wherein, is connected to a top connection in the upper end of said exterior central tube; And outwards be convexly equipped with a junction; Said connecting portion contacts with the inwall of said outer tube, and fixes through a shear pin and said outer tube, and the lower end of said inner central tube is circumscribed with a lower contact;
Wherein, The upper end of said outer tube inwardly is convexly equipped with and forms a fit portion; Said fit portion correspondence is set in the external surface of said top connection; And the upper end edge axially spaced-apart of itself and said exterior central tube has distance, and the lower end of said outer tube then is bolted in the external surface of said lower contact, and said exterior central tube can move with respect to said inner central tube and outer tube under the drive of said top connection vertically.
Aforesaid tubing string safe pressure relief device, wherein, the external surface of said top connection is a hexagon, the interior hexagon that the inner peripheral surface of said fit portion is complementary for the external surface with said top connection.
Aforesaid tubing string safe pressure relief device; Wherein, further be provided with retaining mechanism between the lower end of said outer tube and the said lower contact, said retaining mechanism includes a lock ring, a lock ring key and a lock ring cap; Said lock ring and lock ring cap are socketed in the said lower contact from top to bottom successively; The upper end of said lock ring is formed with the lock tooth, and the alveolus of said lock tooth and said outer tube lower surface is clip mutually, and said lock ring key is embedded between the outer wall of the inwall of said lock ring and said lower contact; Said lock ring cap is connected to the lower end of said lock ring, and it is through pin for suppressing metal and said lower contact Joint.
Aforesaid tubing string safe pressure relief device, wherein, the external surface of said inner central tube is embedded with a plurality of sealing rings respectively in the both sides up and down of guide hole in said.
Aforesaid tubing string safe pressure relief device, wherein, the lower surface of said top connection is connected to the upper end of said inner central tube, and the lower end of said exterior central tube contacts with the upper surface of said lower contact.
Aforesaid tubing string safe pressure relief device, wherein, the upper end of said top connection is provided with a box cupling, and the periphery wall of the lower end of said lower contact is formed with screw thread.
The tubing string safe pressure relief device that the utility model proposes; It utilizes the principle of mechanical sliding sleeve switch; Be employed in eyelet (interior guide hole, the outer pressure guide hole) structure that can be connected or stagger is set on the inside and outside central tube, can use repeatedly, promptly when on exterior central tube, carrying; Be not communicated with inside and outside this pressure relief device, be in closed condition; When transferring exterior central tube; This pressure relief device is inside and outside to be communicated with; Be in the state of opening, thus, through on when carrying exterior central tube eyelet stagger close, eyelet is communicated with the mode of opening when transferring exterior central tube; Make repeatedly to close repeatedly inside and outside the fishing string and suppress, be communicated with pressure release, to realize the function of outside pressure release.For the utility model; It carries out fluid power when lifting at fishing string; The ability cooperation is repeatedly suppressed unfreezing repeatedly, pressure release is disanchored; Jam problem when solving existing fishing string end-on card downhole tool or meeting the soft cards such as sand card of card tubing string fish has overcome the defective of prior art, can be widely used in the fluid power unfreezing, salvage in the workover treatment of fish such as oil-water well down-hole string, instrument and screen casing.
In addition; The tubing string safe pressure relief device that the utility model proposes; When underground work, between the upper end through sleeve pipe outside and the external surface of said top connection the hexagon that matches is set, can be between top connection and outer tube transfer torque; Carry out the needs of the back-off operation of counter-rotating when running into burst accidents such as bit freezing in the down-hole, thereby guaranteed construction safety to satisfy.
Description of drawings
Fig. 1 is the structural representation of the tubing string safe pressure relief device of the utility model.
The critical element label declaration:
Guide hole in 1 inner central tube 11
12 sealing rings, 2 exterior central tubes
21 outer pressure guide hole 22 connecting portions
23 shear pins, 3 outer tubes
31 annular spaces, 32 relief holes
33 fit portions, 34 alveolus
4 top connections, 41 box cuplings
5 lower contacts, 6 retaining mechanisms
61 lock rings, 611 lock teeth
62 lock ring keys, 63 lock ring caps
64 pins for suppressing metal
The specific embodiment
Understand for technical characterictic, purpose and effect to the utility model have more clearly, contrast the specific embodiment of description of drawings the utility model at present:
Referring to Fig. 1; The tubing string safe pressure relief device that the utility model proposes; It includes a sheathed successively from the inside to the outside inner central tube 1, an exterior central tube 2 and an outer tube 3; Corresponding interior guide hole 11, the outer pressure guide hole 21 that is interconnected that offer on the sidewall of said inner central tube 1 and exterior central tube 2 then is formed with annular space 31 between the inwall of said exterior central tube 2 external surfaces and said outer tube 3, and the relief hole of offering on said outer tube 3 sidewalls 32 is connected with the outer pressure guide hole 21 of said exterior central tube 2 through said annular space 31; Wherein, Be connected to a top connection 4 in the upper end of said exterior central tube 2, and the upper end of said exterior central tube 2 outwards is convexly equipped with a junction 22, said connecting portion 22 contacts with the inwall of said outer tube 3; And fix through a shear pin 23 and said outer tube 3, the lower end of said inner central tube 1 is circumscribed with a lower contact 5;
Wherein, The upper end of said outer tube 3 inwardly is convexly equipped with and forms a fit portion 33; Said fit portion 33 correspondences are set in the external surface of said top connection 4; And the upper end edge axially spaced-apart of itself and said exterior central tube 2 has distance, and the lower end of said outer tube 3 then is bolted in the external surface of said lower contact 5, and said exterior central tube 2 can move with respect to said inner central tube 1 and outer tube 3 under the drive of said top connection 4 vertically.
Further, the external surface of said top connection 4 is a hexagon, the interior hexagon that the inner peripheral surface of said fit portion 33 is complementary for the external surface with said top connection 4.When underground work; When running into burst accident such as bit freezing, need carry out counter-rotating, so that when going up the back-off operation that proposes downhole tool; So design; Can be between top connection and outer tube transfer torque so that moment of torsion further is passed to other parts that connected downwards, thereby guaranteed construction safety.
Wherein, Further be provided with retaining mechanism 6 between the lower end of said outer tube 3 and the said lower contact 5; Said retaining mechanism 6 includes a lock ring 61, a lock ring key 62 and a lock ring cap 63, and said lock ring 61 and lock ring cap 63 from top to bottom are set in the said lower contact 5 successively, and said lock ring 61 upper ends are formed with lock tooth 611; The alveolus 34 of said lock tooth 611 and said outer tube 3 lower surfaces is clip mutually; Said lock ring key 62 is embedded between the outer wall of the inwall of said lock ring 61 and said lower contact 5, and said lock ring cap 63 is connected to the lower end of said lock ring 61, and it is through pin for suppressing metal 64 and said lower contact 5 Joints.When back-off operation, this retaining mechanism can be guaranteed can when back-off, can not guarantee the functional reliability of device together with the downward transfer torque of top connection like this because of situation such as screw thread stripped thread relatively rotate between outer sleeve and the lower contact.
In order further to improve the sealing performance between inner central tube 1 and exterior central tube 2, the lower contact 5, the external surface of said inner central tube 1 upper and lower both sides of guide hole 11 in said are embedded with a plurality of sealing rings 12 respectively.
Preferred embodiment be, the lower surface of said top connection 4 is connected to the upper end of said inner central tube 1, and the lower end of said exterior central tube 2 contacts with the upper surface of said lower contact 5.When implementing to use; So be provided with, can with interior guide hole, when outer pressure guide hole is interconnected the residing position of exterior central tube as its extreme position that moves down, when exterior central tube 2 moves up and down vertically; This structure can make the worker confirm that better interior guide hole, outer pressure guide hole are from connected state; Still be in the state that staggers each other, further strengthen the operation convenience of the utility model, improved operating efficiency.
In addition, the upper end of said top connection 4 is provided with a box cupling 41, and the periphery wall of the lower end of said lower contact 5 is formed with screw thread, so that the utility model is connected with other parts when going into the well use.
The tubing string safe pressure relief device that the utility model proposes is when concrete the use, with fluid power release device, anchoring device, this tubing string safe pressure relief device and drag for lance and connect successively; Salvage tubing string to constitute one, its concrete operating principle is: the jointed rod in the fluid power release device upper end of said fishing string makes this fishing string be lowered in the oil well casing with drilling rod; When drag for lance drag in the well meet the card instrument or meet card tubing string fish after, through carrying this fishing string on the drilling rod, because outer tube 3 connects lower contacts 4; And lower contact 4 is connecting the lance that drags for of engagement with the fish; Meeting the card instrument or meeting under the draw of card tubing string fish, outer tube can be not up, and then the top connection in the utility model 4 drives exterior central tube 2 and cuts short shear pin 23 and up; And then 2 outer pressure guide hole 21 on the exterior central tube staggered with the interior guide hole 11 of inner central tube 1 mutually; The sidewall of exterior central tube is not communicated with in making, and then is not communicated with inside and outside making the utility model, is in closed condition; Suppress in this fishing string through well head, anchoring device is anchored on the sleeve pipe, continue simultaneously to suppress; Make the fluid power release device through suppressing the effect that reaches the down-hole reinforcement, realize the purpose of salvaging, (this process will be a prior art will meet the card instrument or to meet the unfreezing of card tubing string fish; Do not do at this and to give unnecessary details), after unfreezing is accomplished, stop to suppress and by the ground pressure release; Because head of liquid is higher in the fishing string, oil jacket pressure is difficult to balance, and the Hydraulic Anchorage device on the fishing string still is difficult to disanchor at this moment; Transfer this fishing string, move down, the outer pressure guide hole 21 of exterior central tube 2 is connected with interior guide hole 11 on the inner central tube 1 to drive top connection 4 and exterior central tube 2; At this moment, the path through forming between interior guide hole 11, outer pressure guide hole 21, annular space 31 and the relief hole 32 is connected with casing annulus with the inner chamber with inner central tube 1; Being that the utility model is inside and outside is communicated with, and is in the state of opening, and then this fishing string is through the utility model pressure release in the oil jacket annular space; Realize pressure balance between the two; And then the anchoring device on this fishing string disanchored, wherein, if it is not thorough to meet the unfreezing of card fish; Then continue to repeat above-mentionedly just to suppress, blowdown step, till complete unfreezing;
At last; On carry drilling rod, to trip out fishing string, then in the utility model; It is up that its top connection 4 drives exterior central tube 2; Make the upper surface top of the connecting portion 22 on this exterior central tube 2 be against the lower surface of fit portion 33 in the outer tube 3, up to drive outer tube 3, lower contact 5 and inner central tube 1 in the lump, and then dragging for lance and meeting the card instrument or meet card tubing string fish also along with upwards proposing well head to accomplish fishing following connection.
The tubing string safe pressure relief device that the utility model proposes; It utilizes the principle of mechanical sliding sleeve switch; Be employed in eyelet (interior guide hole, the outer pressure guide hole) structure that can be connected or stagger is set on the inside and outside central tube, can use repeatedly, promptly when on exterior central tube, carrying; Be not communicated with inside and outside this pressure relief device, be in closed condition; When transferring exterior central tube; This pressure relief device is inside and outside to be communicated with; Be in the state of opening, thus, through on when carrying exterior central tube eyelet stagger close, eyelet is communicated with the mode of opening when transferring exterior central tube; Make repeatedly to close repeatedly inside and outside the fishing string and suppress, be communicated with pressure release, to realize the function of outside pressure release.For the utility model; It carries out fluid power when lifting at fishing string; The ability cooperation is repeatedly suppressed unfreezing repeatedly, pressure release is disanchored; Jam problem when solving existing fishing string end-on card downhole tool or meeting the soft cards such as sand card of card tubing string fish has overcome the defective of prior art, can be widely used in the fluid power unfreezing, salvage in the workover treatment of fish such as oil-water well down-hole string, instrument and screen casing.
The above is merely the schematic specific embodiment of the utility model, is not in order to limit the scope of the utility model.Any those skilled in the art, equivalent variations of under the prerequisite of design that does not break away from the utility model and principle, having done and modification all should belong to the scope that the utility model is protected.
Claims (8)
1. tubing string safe pressure relief device; It is characterized in that said tubing string safe pressure relief device includes a sheathed successively from the inside to the outside inner central tube, an exterior central tube and an outer tube, the corresponding interior guide hole that is interconnected, the outer pressure guide hole of offering on the sidewall of said inner central tube and exterior central tube; Then be formed with annular space between the external surface of said exterior central tube and the inwall of said outer tube; The relief hole of offering on the said outer tube sidewall is connected with the outer pressure guide hole of said exterior central tube through said annular space, wherein, is connected to a top connection in the upper end of said exterior central tube; And outwards be convexly equipped with a junction; Said connecting portion contacts with the inwall of said outer tube, and fixes through a shear pin and said outer tube, and the lower end of said inner central tube is circumscribed with a lower contact;
Wherein, The upper end of said outer tube inwardly is convexly equipped with and forms a fit portion; Said fit portion correspondence is set in the external surface of said top connection; And the upper end edge axially spaced-apart of itself and said exterior central tube has distance, and the lower end of said outer tube then is bolted in the external surface of said lower contact, and said exterior central tube can move with respect to said inner central tube and outer tube under the drive of said top connection vertically.
2. tubing string safe pressure relief device as claimed in claim 1 is characterized in that, the external surface of said top connection is a hexagon, the interior hexagon that the inner peripheral surface of said fit portion is complementary for the external surface with said top connection.
3. tubing string safe pressure relief device as claimed in claim 2; It is characterized in that, further be provided with retaining mechanism between the lower end of said outer tube and the said lower contact, said retaining mechanism includes a lock ring, a lock ring key and a lock ring cap; Said lock ring and lock ring cap are socketed in the said lower contact from top to bottom successively; The upper end of said lock ring is formed with the lock tooth, and the alveolus of said lock tooth and said outer tube lower surface is clip mutually, and said lock ring key is embedded between the outer wall of the inwall of said lock ring and said lower contact; Said lock ring cap is connected to the lower end of said lock ring, and it is through pin for suppressing metal and said lower contact Joint.
4. like each described tubing string safe pressure relief device of claim 1 to 3, it is characterized in that the external surface of said inner central tube is embedded with a plurality of sealing rings respectively in the both sides up and down of guide hole in said.
5. tubing string safe pressure relief device as claimed in claim 4 is characterized in that, the lower surface of said top connection is connected to the upper end of said inner central tube, and the lower end of said exterior central tube contacts with the upper surface of said lower contact.
6. tubing string safe pressure relief device as claimed in claim 5 is characterized in that the upper end of said top connection is provided with a box cupling, and the periphery wall of the lower end of said lower contact is formed with screw thread.
7. tubing string safe pressure relief device as claimed in claim 1 is characterized in that, the lower surface of said top connection is connected to the upper end of said inner central tube, and the lower end of said exterior central tube contacts with the upper surface of said lower contact.
8. like claim 1 or 7 described tubing string safe pressure relief devices, it is characterized in that the upper end of said top connection forms a box cupling, the periphery wall of the lower end of said lower contact is provided with screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200672787U CN202441295U (en) | 2012-02-27 | 2012-02-27 | Safety pressure relief device for pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200672787U CN202441295U (en) | 2012-02-27 | 2012-02-27 | Safety pressure relief device for pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202441295U true CN202441295U (en) | 2012-09-19 |
Family
ID=46822748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200672787U Expired - Fee Related CN202441295U (en) | 2012-02-27 | 2012-02-27 | Safety pressure relief device for pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202441295U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907127A (en) * | 2015-12-23 | 2017-06-30 | 中国石油天然气股份有限公司 | Cement retaining pipe column and cement squeezing and injecting tool |
| CN113482561A (en) * | 2021-05-26 | 2021-10-08 | 中海油能源发展股份有限公司 | Oil and gas well sealing casing recovery device and recovery method thereof |
-
2012
- 2012-02-27 CN CN2012200672787U patent/CN202441295U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907127A (en) * | 2015-12-23 | 2017-06-30 | 中国石油天然气股份有限公司 | Cement retaining pipe column and cement squeezing and injecting tool |
| CN106907127B (en) * | 2015-12-23 | 2019-05-03 | 中国石油天然气股份有限公司 | Cement retaining pipe column and cement squeezing and injecting tool |
| CN113482561A (en) * | 2021-05-26 | 2021-10-08 | 中海油能源发展股份有限公司 | Oil and gas well sealing casing recovery device and recovery method thereof |
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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: 20120919 Termination date: 20210227 |