CN204060613U - The axial compression mechanism of two packing element thermal packer - Google Patents
The axial compression mechanism of two packing element thermal packer Download PDFInfo
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- CN204060613U CN204060613U CN201420321240.7U CN201420321240U CN204060613U CN 204060613 U CN204060613 U CN 204060613U CN 201420321240 U CN201420321240 U CN 201420321240U CN 204060613 U CN204060613 U CN 204060613U
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- central tube
- packing element
- axial compression
- compression mechanism
- thermal packer
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Abstract
The axial compression mechanism of a kind of pair of packing element thermal packer, described axial compression mechanism is arranged on the central tube of two packing element thermal packer, described central tube inner sleeve is by inner central tube, joint is installed in the end of wherein one end of described inner central tube, and described central tube is provided with lower contact away from one end of described inner central tube; Described axial compression mechanism moves along the axis of described central tube the compression packing element compressing two packing element thermal packers; Be set with sleeve in described compression packing element, it is characterized in that: described axial compression compressing mechanism comprises upper cone, lower cone and slips; Described upper cone, described slips and described lower cone are arranged on described central tube successively; The conical surface of described upper cone, the conical surface of described lower cone fit with the medial slope at described slips two ends respectively.Above-mentioned axial compression mechanism, specially for the situation of double containment packing element, can be widely used in offshore oil thermal recovery construction technology.
Description
Technical field
The downhole tool field that the utility model uses when relating to offshore oil thermal recovery, particularly a kind of axial compression mechanism of the packer for packing oil jacket annular space.
Background technology
Multielement hot fluid is handled up and multielement hot fluid driving is the effective technology method that Offshore Heavy Oil Field is exploited; thermal packer is the important composition parts of hot fluid injection string; its effect is the oil jacket annular space in heated fluid injection process more than oil-separating layer; prevent high temperature fluid from entering the annular space of sleeve pipe and instlated tubular composition; thus reach the heat waste reducing pit shaft, and the object of formation protection sleeve pipe.Terminate at hot-fluid injection, forward in oil recovery process, packer still can have sealing function.
Generally speaking, thermal packer extrudes packing element mainly through independent compression or independent wedging mode and realizes setting, and sealing performance is good not, and sealing persistence is not high.Most of thermal packer is steam injection packer, namely at high temperature has sealing performance, when packer just loses sealing performance under high temperature drops to low-temperature condition, can not keep sealing function at low temperatures.Most of thermal packer bearing capacity is at high temperature limited, is generally no more than 15MPa.And most of thermal packer function singleness, cannot with other instruments of down-hole with the use of, do not possess function of giving up.
Utility model content
For the mode solving existing thermal packer extruding packing element is single, sealing performance is bad, and when sealed environment changes, the problem that sealing was easily lost efficacy, the utility model proposes a kind of just to the axial compression mechanism of the thermal packer that two packing element seals.Its concrete technical scheme is as follows:
The axial compression mechanism of a kind of pair of packing element thermal packer, described axial compression mechanism is arranged on the central tube of two packing element thermal packer, described central tube inner sleeve is by inner central tube, joint is installed in the end of wherein one end of described inner central tube, and described central tube is provided with lower contact away from one end of described inner central tube; Described axial compression mechanism moves along the axis of described central tube the compression packing element compressing two packing element thermal packers; Be set with sleeve in described compression packing element, it is characterized in that: described axial compression compressing mechanism comprises upper cone, lower cone and slips;
Described upper cone, described slips and described lower cone are arranged on described central tube successively; The conical surface of described upper cone, the conical surface of described lower cone fit with the medial slope at described slips two ends respectively.
Further, described axial compression mechanism also comprises and sets assembly; The described assembly that sets moves the described compression packing element of compression along the axis of described central tube.
Further, set assembly described in and comprise upper piston and power transmission cover;
Described upper piston is sleeved on described inner central tube; Described power transmission cover is resisted against the end of the other end described upper piston being installed described top connection.
Further, described axial compression mechanism also comprises latch assembly; Described latch assembly is for limiting the position of described axial compression mechanism.
Further, described latch assembly comprises overcoat, fishing head, upper baffle ring and pin;
The end of described central tube arranges the first breach, and one end of described fishing head arranges boss;
Described coat suit is in the outside of described central tube, and the two ends of described overcoat are connected with described power transmission cover, described upper baffle ring respectively, puts the one end of installing described upper baffle ring and arrange the second breach outside described;
Described boss correspondence is arranged in described first breach and described second breach, and described fishing head is fixed on described central tube by described pin.
Further, described latch assembly also comprises and sets pin; Pin is set and described upper baffle ring is fixed described in the other end described sleeve connecting described upper cone passes through.
Further, described compression packing element is formed by the rubber combined of two or more material; The material of described compression packing element can be high temperature resistant 350 degrees Celsius.
The utility model is as follows relative to the beneficial effect of prior art:
Axial compression mechanism described in the utility model, the thermal packer sealed for two packing element specially and designing, unique assembly is set by designing, latch assembly and compression packing element form, realize two packing element thermal packer in setting procedure, first compression packing element sets as primary seal, wedging packing element is as auxiliary sealing member, dual sealing functions guarantees that thermal packer is in heat injection process, oil recovery process mesohigh, sealing performance under the environment of high and low temperature alternative, thus guarantee that two packing element thermal packer can keep sealing for a long time, there is higher sealing persistence.
Accompanying drawing explanation
Fig. 1 be adopt two packing element thermal packers of the utility model axial compression mechanism partly cut open schematic diagram;
Fig. 2 is the schematic cross-section of the A-A of Fig. 1;
Fig. 3 is the partial schematic diagram of the lower contact part of of the present utility model pair of packing element thermal packer.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, clear, complete description is carried out to the technical scheme in the utility model embodiment.
Refer to shown in Fig. 1, it partly cuts open schematic diagram for what adopt two packing element thermal packers of the utility model axial compression mechanism, a kind of two packing element thermal packer, comprises top connection 1, lower contact 31, central tube 7, inner central tube 4, sleeve 12, compression packing element 11, wedging packing element 26, axial compression mechanism and wedging mechanism.
Joint 1 is installed in the end of wherein one end of inner central tube 4; More preferably, top connection 1 is connected with inner central tube 4 by screw thread.The outside suit central tube 7 of inner central tube 4.
The outer cover sleeved 12 of central tube 7, central tube 7 installs lower contact 31 away from one end of inner central tube 4.
Compression packing element 11 is sleeved on the outside of sleeve 12, and axial compression mechanism is arranged on central tube 7, and the axis of axial compression mechanism centrally pipe 7 moves compression compression packing element 11; Wedging packing element 26 is sleeved on the outside of lower contact 31, and wedging mechanism is arranged in lower contact 31, and wedging mechanism moves compression wedging packing element 26 along the axis of lower contact 31.
Thermal packer of the present utility model has dual sealing functions, first compression packing element 11 sets as primary seal, wedging packing element 26 is as auxiliary sealing member, dual sealing functions guarantees the sealing performance of thermal packer under the environment of heat injection process, oil recovery process mesohigh, high and low temperature alternative, thus guarantee that thermal packer can keep sealing for a long time, there is higher sealing persistence, there is longer application life simultaneously.
Wherein, axial compression mechanism comprises upper cone 14, lower cone 20 and slips 17.
Central tube 7 is installed successively lock ring 6, overcoat 8, sleeve 12, upper cone 14, slips 17 and lower cone 20; The conical surface of upper cone 14, the conical surface of lower cone 20 fit with the medial slope at slips 17 two ends respectively.Lower contact 31 is installed in the end of central tube 7 being installed one end of lower cone 20.
Wedging packing element 26 compresses slips 17 further setting in process, can strengthen the anchorage force of slips 17, improves the bearing capacity of tubing string in thermal packer.
More preferably, slips 17 is covered with slip sleeve 16, and slip sleeve 16 is for the motion of righting with location slips 17.
More preferably, lower cone 20 is connected with slip sleeve 16 by locating snap ring 22, and locating snap ring 22 is threaded with slip sleeve 16, locating snap ring 22 has protrusion step, and it act as and prevents lower cone 20 from deviating from slip sleeve 16.
More preferably, upper end external surface and lock ring 6 inner surface of central tube 7 are engaged each other by screw thread, ensure that lock ring 6 can only single-way moving.
The utility model increases wedging packing element 26 and sets, and can meet marine thermal production well requirement thermal packer in oil recovery process, all have good pressure-resistant seal performance.
As the enforceable mode of one, one end of sleeve 12 is connected with upper cone 14.More preferably, one end of sleeve 12 is connected with upper cone 14 by screw thread, and arranges sealing ring between sleeve 12 and upper cone 14.
As the enforceable mode of one, axial compression mechanism also comprises and sets assembly and latch assembly;
The axis setting assembly centrally pipe 7 moves compression compression packing element 11, to complete the process of setting; Latch assembly is for limiting the position of axial compression mechanism.
As the enforceable mode of one, set that assembly comprises steel bushing 2, upper piston 3 overlaps 5 with power transmission;
Upper piston 3 is sleeved on inner central tube 4; Power transmission cover 5 is resisted against the end of other end upper piston 3 being installed joint 1.
More preferably, steel bushing 2 is sleeved on the outside of upper piston 3, and steel bushing 2 is connected with top connection 1 by screw thread; The end of upper piston 3 is resisted against in top connection 1.Sealing ring is provided with between top connection 1 and upper piston 3, between upper piston 3 and steel bushing 2, between upper piston 3 and inner central tube 4.
As the enforceable mode of one, latch assembly comprises overcoat 8, fishing head 9, upper baffle ring 10, lower baffle ring 13 and pin.
The end of central tube 7 arranges the first breach, and one end of fishing head 9 arranges boss; Overcoat 8 is sleeved on the outside of central tube 7, and the two ends of overcoat 8 overlap 5 respectively with power transmission, upper baffle ring 10 is connected, and the one end of overcoat 8 being installed baffle ring 10 arranges the second breach.
Boss correspondence is arranged in the first breach and the second breach, and fishing head 9 is fixed by a pin on central tube 7.
More preferably, the two ends of overcoat 8 overlap 5 respectively by screw thread and power transmission, upper baffle ring 10 is connected.The two ends of compression packing element 11 are resisted against upper baffle ring 10 and lower baffle ring 13.
Shown in Fig. 2, it is the schematic cross-section of the A-A of Fig. 1, in the present embodiment, the upper end of central tube 7 is provided with four the first breach, first breach is U-type groove, and the lower end of fishing head 9 is provided with four boss, and the boss of fishing head 9 is assemblied in the U-type groove of central tube 7; The lower end of overcoat 8 is provided with four the second breach, and the degree of depth of the second breach is less, and the top of fishing head 9 convex platform is assemblied in the second breach of overcoat 8.
As the enforceable mode of one, latch assembly also comprises and sets pin; Other end sleeve 12 connecting upper cone 14 is by setting pin and upper baffle ring 10 is fixed.
Refer to shown in Fig. 3, it is the partial schematic diagram of the lower contact part of the thermal packer adopting axial compression mechanism of the present utility model, and wedging mechanism comprises centering ring 24, wedging ring 27, lower piston 30 and slip cap 32.
Lower contact 31 is installed successively centering ring 24, first wire guard 25, wedging packing element 26, wedging ring 27, second wire guard 28, wedging retaining ring 29, lower piston 30 and slip cap 32.
Centering ring 24 is connected with the lower cone 20 of axial compression mechanism; Wedging packing element 26 is between centering ring 24 and wedging ring 27, and one end that wedging packing element 26 contacts with wedging ring 27 arranges the first inclined-plane, and one end that wedging ring 27 contacts with wedging packing element 26 arranges the second inclined-plane, and the first inclined-plane matches with the second inclined-plane.Wedging ring 27 moves, and the second ramp effect is in the first inclined-plane, and packing element 26 is wedged in extruding.
Inner surface and the lower contact 31 of lower piston 30 are threaded connection.
Slip cap 32 is sleeved on the outside of lower piston 30, slip cap 32 moves along the axis of lower contact 31 towards the direction of centering ring 24, second wire guard 28 is placed on wedging ring 27, slip cap 32 promotes wedging ring 27 and compresses wedging packing element 26, when wedging the stressed wedge of ring 27 and entering to wedge packing element 26, by extruding first wire guard 25 and the second wire guard 28, both play the effect of assisting sealing oil sets annular space.
More preferably, the first wire guard 25 be resisted against on wedging packing element 26 with wedging ring 27 discontiguous end face, the second wire guard 28 be resisted against on wedging ring 27 with the discontiguous end face of wedging packing element 26.
More preferably, between lower piston 30 and lower contact 31, between lower piston 30 and slip cap 32, be provided with sealing ring.
As the enforceable mode of one, thermal packer also comprises releasing gadget.Releasing gadget is used for lower contact 31 is separated with central tube 7.Releasing gadget can combine with other instruments of down-hole, improves the scope of application of thermal packer.
As the enforceable mode of one, releasing gadget comprises lock claw inner sleeve 15, lock claw 18, sliding sleeve 19, support ring 21, baffle ring 23 and deblocking pin.
Lock claw inner sleeve 15 is connected with other end inner central tube 4 being installed joint 1, and lock claw inner sleeve 15 is sleeved on the inside of central tube 7, and sliding sleeve 19 is sleeved on the inside of lock claw inner sleeve 15, and sliding sleeve 19 and lock claw inner sleeve 15 are fixed by deblocking pin.
One end of lock claw inner sleeve 15 is connected with lock claw 18, and more preferably, one end and the lock claw 18 of lock claw inner sleeve 15 are threaded connection.Sliding sleeve 19 is connected with baffle ring 23 near one end of lower contact 31.Support ring 21 is between lock claw inner sleeve 15 and baffle ring 23, and support ring 21 is resisted against the end of sliding sleeve 19.
More preferably, lock claw 18 has eight calvus, and the lower end of each calvus has ramp type structure.Sliding sleeve 19 is connected with baffle ring 23 by screw thread.Sliding sleeve 19 is arc away from the inner surface of one end of lower contact 31.
As the enforceable mode of one, the material of wedging packing element 26 can be high temperature resistant 350 degrees Celsius.
As the enforceable mode of one, compression packing element 11 is formed by the rubber combined of two or more material; The material of compression packing element 11 can be high temperature resistant 350 degrees Celsius.
The utility model selects high-quality compound compression packing element 11, makes thermal packer under the alternate environment of 350 celsius temperatures and stratum low temperature, can continue withstand voltage 20MPa, improve application life.
As the enforceable mode of one, the centre position suit central tube 7 of inner central tube 4.
Thermal packer of the present utility model, by thermal recovery tubular column lower going-into-well wall sleeve pipe, until desired depth, after dropping into ball, starts to add hydraulic pressure from well head.After pressure reaches setting value, the anti-pin that is hampered is cut off, and upper piston 3 moves, and by inner central tube 4 and central tube 7, setting force is passed to upper cone 14, it is overhanging that upper cone 14 promotes slips 17, grappling casing wall.
Upper piston 3 continues mobile, sets pin and is cut off, and makes upper baffle ring 10 extrude compression packing element 11, and the compression packing element 11 Seal Oil cover annular space after compression, completes and set.
Continue to add hydraulic pressure, when deblocking pin is cut off, sliding sleeve 19 starts mobile, and support ring 21 is released outside lock claw 18 by the lower end step of sliding sleeve 19, starts subsequently oil transportation tubing string is carried in pressure release also.Top connection 1, steel bushing 2, upper piston 3, inner central tube 4, lock claw inner sleeve 15, lock claw 18, sliding sleeve 19, support ring 21 propose shaft bottom together with baffle ring 23, and remaining part is separated, and completes the process of giving up.
The cavity that isolated slip cap 32, lower piston 30 and lower contact 31 surround is subject to High Pressure, prevent that setting pin is cut off, slip cap 32 starts to move up under differential pressure action, drive wedging ring 27 and wedging retaining ring 29 to move up simultaneously, wedging ring 27 extrudes Wedged packing element 26, first wire guard 25 and the second wire guard 28, seals again to oil jacket annular space.
Above embodiment is only preferred embodiment of the present utility model, is not intended to limit protection domain of the present utility model.Therefore, it will be appreciated by those skilled in the art that do within all spirit in the technical scheme described in the utility model and principle any amendment, equivalent replacement, improvement etc., all should be included in scope that claim of the present utility model defines.
Claims (6)
1. the axial compression mechanism of a two packing element thermal packer, described axial compression mechanism is arranged on the central tube of two packing element thermal packer, described central tube inner sleeve is by inner central tube, joint is installed in the end of wherein one end of described inner central tube, and described central tube is provided with lower contact away from one end of described inner central tube; Described axial compression mechanism moves along the axis of described central tube the compression packing element compressing two packing element thermal packers; Be set with sleeve in described compression packing element, it is characterized in that: described axial compression compressing mechanism comprises upper cone, lower cone and slips;
Described upper cone, described slips and described lower cone are arranged on described central tube successively; The conical surface of described upper cone, the conical surface of described lower cone fit with the medial slope at described slips two ends respectively.
2. the axial compression mechanism of according to claim 1 pair of packing element thermal packer, is characterized in that: described axial compression mechanism also comprises and sets assembly; The described assembly that sets moves the described compression packing element of compression along the axis of described central tube.
3. the axial compression mechanism of according to claim 2 pair of packing element thermal packer, is characterized in that: described in set assembly and comprise upper piston and power transmission cover;
Described upper piston is sleeved on described inner central tube; Described power transmission cover is resisted against the end of the other end described upper piston being installed described top connection.
4. the axial compression mechanism of according to claim 3 pair of packing element thermal packer, is characterized in that: described axial compression mechanism also comprises latch assembly; Described latch assembly is for limiting the position of described axial compression mechanism.
5. the axial compression mechanism of according to claim 4 pair of packing element thermal packer, is characterized in that: described latch assembly comprises overcoat, fishing head, upper baffle ring and pin;
The end of described central tube arranges the first breach, and one end of described fishing head arranges boss;
Described coat suit is in the outside of described central tube, and the two ends of described overcoat are connected with described power transmission cover, described upper baffle ring respectively, puts the one end of installing described upper baffle ring and arrange the second breach outside described;
Described boss correspondence is arranged in described first breach and described second breach, and described fishing head is fixed on described central tube by described pin.
6. the axial compression mechanism of according to claim 5 pair of packing element thermal packer, is characterized in that: described latch assembly also comprises and sets pin; Pin is set and described upper baffle ring is fixed described in the other end described sleeve connecting described upper cone passes through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420321240.7U CN204060613U (en) | 2014-06-16 | 2014-06-16 | The axial compression mechanism of two packing element thermal packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420321240.7U CN204060613U (en) | 2014-06-16 | 2014-06-16 | The axial compression mechanism of two packing element thermal packer |
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| Publication Number | Publication Date |
|---|---|
| CN204060613U true CN204060613U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420321240.7U Expired - Fee Related CN204060613U (en) | 2014-06-16 | 2014-06-16 | The axial compression mechanism of two packing element thermal packer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965958A (en) * | 2019-11-26 | 2020-04-07 | 宝鸡瑞林石油机电设备有限责任公司 | Bidirectional seat seal backflow-preventing packer |
-
2014
- 2014-06-16 CN CN201420321240.7U patent/CN204060613U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110965958A (en) * | 2019-11-26 | 2020-04-07 | 宝鸡瑞林石油机电设备有限责任公司 | Bidirectional seat seal backflow-preventing packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CHINA OILFIELD SERVICES Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CHINA OILFIELD SERVICES Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. |
|
| 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: 20141231 |