CN103806856A - Ultra-long stroke well head sealing device and sealing method thereof - Google Patents
Ultra-long stroke well head sealing device and sealing method thereof Download PDFInfo
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- CN103806856A CN103806856A CN201210446186.4A CN201210446186A CN103806856A CN 103806856 A CN103806856 A CN 103806856A CN 201210446186 A CN201210446186 A CN 201210446186A CN 103806856 A CN103806856 A CN 103806856A
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Abstract
The invention discloses an ultra-long stroke well head sealing device and an ultra-long stroke well head sealing method, wherein the device comprises a sealing pipe and an outer pipe, the sealing pipe and the outer pipe are sheathed at inside and outside, the upper end of the sealing pipe is connected with the inner wall of an upper joint, the upper end of the outer pipe is connected with a liquid outlet nipple, the upper end of the liquid outlet nipple is connected with the outer wall of the upper joint, the lower end of the outer pipe is connected onto a lower joint, an annular hollow part is formed between the sealing pipe and the outer pipe, and a liquid outlet joint communicated to the annular hollow part is arranged on the liquid outlet nipple. The inside of the sealing pipe is tightly sheathed with a sealing plunger piston, the hard sealing is formed, and in addition, the sealing plunger piston is enabled to vertically and freely move inside the sealing pipe. The sealing plunger piston adopts an upper rod joint at the self upper end for forming soft sealing with the inner wall of the sealing pipe, and adopts a lower rod joint at the self lower end for forming soft sealing with the inner wall of the sealing pipe. Sealing rings are respectively arranged between the upper rod joint and the inner wall of the sealing pipe as well as between the lower rod joint and the inner wall of the sealing pipe, and sleeve rings are sheathed outside the sealing rings. The ultra-long stroke well head sealing device and the ultra-long stroke well head sealing method have the advantages that the ultra-long stroke pumping unit well head sealing requirement is met, in addition, the structure is simple, and the field application is convenient and fast.
Description
Technical field
The present invention relates to the Sealing Technology of oil field shaft mouth, specifically a kind of ultra-long-stroke well mouth sealing device and encapsulating method thereof.
Background technology
Ultra long stroke beam-pumping unit because thering is energy efficiency, be adapted to deep-well, the advantage such as exploit in heavy oil wells, and greatly developed.Current conventional pumping unit wellhead sealing seals polished rod by packing box and realizes, and more than being placed in well head, but ultra long stroke beam-pumping unit mainly adopts short structure, utilizes wirerope-winding mode to produce, be subject to well head height restriction, wellhead sealing need be placed in to down-hole.Therefore, conventional well head Sealing Technology can not meet the needs of ultra-long-stroke oil pumping.
In view of this,, for the problems referred to above, ultra-long-stroke well mouth sealing device and the encapsulating method thereof of the above-mentioned disappearance of a kind of effective improvement proposed.
Summary of the invention
The object of the present invention is to provide a kind of ultra-long-stroke well mouth sealing device and encapsulating method thereof, not only meet the needs of ultra long stroke beam-pumping unit wellhead sealing, and simple in structure, and on-the-spot application is convenient and swift.
In order to reach above-mentioned purpose, the present invention has adopted following technical scheme, a kind of ultra-long-stroke well mouth sealing device, the sealed tube being nested inside and outside comprising and outer tube, described sealed tube upper end is connected to top sub inwall, and described outer tube upper end connects fluid pipe nipple, fluid pipe nipple upper end is connected to the outer wall of top sub, the lower end of outer tube is connected on the joint of bottom, between described sealed tube and outer tube, forms annular space, is provided with the fluid joint that is communicated to above-mentioned annular space on fluid pipe nipple.
The inner tight cover of described sealed tube has sealed plunger to form hard sealing and guarantees sealed plunger moving up and down freely in sealed tube inside.
Described sealed plunger knock-off joint on self upper end adopts forms soft seal with sealed tube inwall, sealed plunger knock-off joint and sealed tube inwall formation soft seal under self lower end adopts.
Between described upper knock-off joint and lower knock-off joint and sealed tube inwall, be provided with joint ring, joint ring outer cover has the collar.
Between described outer tube upper end and fluid pipe nipple lower end, be connected with hanger.
Described sealed tube is that upper sealed tube and lower seal pipe connect and compose by sealed fitting each other.
Between described sealed fitting inside and upper-lower seal pipe, be provided with sealing ring.
Described outer tube is that upper exterior tube and lower outer pipe connect and compose by outer tube joint each other.
For realizing above-mentioned another object, technical scheme of the present invention is as follows: utilize a kind of ultra-long-stroke well mouth sealing device to carry out the method for wellhead sealing, the steps include:
First ultra-long-stroke well mouth sealing device is placed in well head, is connected on oil pipe and is become one with oil pipe by top sub and bottom joint, the upper knock-off joint in sealed tube is connected with oil pumper suspension point by wire rope, and lower knock-off joint is connected with sucker rod;
Then start normal oil pumping operation, sealed plunger and joint ring complete the reciprocating motion of up-down stroke in sealed tube with wire rope, because sealed plunger outer wall and sealed tube inwall form hard sealing, sealed plunger upper and lower side and sealed tube form soft seal, combine two-stage sealing completed the seal operation of ultra-long-stroke well mouth sealing device at well head place by soft or hard.
Compared to prior art, the present invention has following beneficial effect:
(1) wellhead sealing system layout, below well head, meets the technical requirements of ultra-long-stroke energy-conserving oil pumping system wellhead sealing; (2) sealed plunger adopts soft or hard combination sealing, withstand voltage good, good sealing effect, and seal fails can propose to change by crawl form, meets the on-the-spot needs of changing packing; (3) on-the-spot application is convenient, fast.
Accompanying drawing explanation
Fig. 1 is a kind of ultra-long-stroke well mouth sealing device structural representation of the present invention;
Fig. 2, Fig. 3 are the enlarged drawing of Fig. 1 diverse location.
In figure: 1, top sub; 2, upper knock-off joint; 3, joint ring; 4, the collar; 5, fluid joint; 6, fluid pipe nipple; 7, sealed plunger; 8, upper sealed tube; 9, hanger; 10, lower knock-off joint; 11, upper exterior tube; 12, sealed fitting; 13, sealing ring; 14, lower seal pipe; 15, outer tube joint; 16, lower outer pipe; 17, bottom joint.
The specific embodiment
Relevant detailed description of the present invention and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides the use of reference with explanation, is not used for the present invention to be limited.
With reference to accompanying drawing 1-Fig. 3, a kind of ultra-long-stroke well mouth sealing device, the fluid pipe nipple 6 upper end endosiphuncular tubes top sub 1 that is threaded, outside fluid pipe nipple 6 lower ends, taper pipe thread connects hanger 9, and fluid pipe nipple stage casing is welded with fluid joint 5; Hanger upper end is connected with fluid pipe nipple by taper pipe thread, and hanger lower end is connected with upper exterior tube 11 by taper pipe thread; Upper exterior tube, lower outer pipe 16 link together by outer tube joint 15, the lower outer pipe lower end endosiphuncular tube bottom joint 17 that is threaded.
Sealed tube inside is equipped with sealed plunger 7, and the two rigid body portion adopts tolerance fit; Sealed plunger 7 upper end internal threads connect upper knock-off joint 2, and lower end internal thread connects lower knock-off joint 10; Upper knock-off joint 2 is connected with oil pumper suspension point by wire rope, and lower knock-off joint 10 is connected with sucker rod.
The connecting thread side of upper knock-off joint 2, lower knock-off joint 10 is equipped with groove, and joint ring 3 is placed in groove, on joint ring with the collar 4.
Utilize a kind of ultra-long-stroke well mouth sealing device to carry out the method for wellhead sealing, the steps include: first ultra-long-stroke well mouth sealing device to be placed in well head, be connected on oil pipe and become one with oil pipe by top sub 1 and bottom joint 17, upper knock-off joint 2 in sealed tube is connected with oil pumper suspension point by wire rope, and lower knock-off joint 10 is connected with sucker rod;
Then start normal oil pumping operation, the two rigid body portion of sealed plunger 7 and sealed tube adopts tolerance fit to form hard sealing, and joint ring 3 forms soft seal with the collar 4 combinations with sealed tube; Sealed plunger 7 and joint ring 3 complete the reciprocating motion of up-down stroke in sealed tube 7,8 with wire rope, realize soft or hard combination two-stage sealing, improve sealing reliability.
The foregoing is only preferred embodiment of the present invention, non-in order to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (9)
1. a ultra-long-stroke well mouth sealing device, it is characterized in that, the sealed tube being nested inside and outside comprising and outer tube, described sealed tube upper end is connected to top sub inwall, described outer tube upper end connects fluid pipe nipple, and fluid pipe nipple upper end is connected to the outer wall of top sub, and the lower end of outer tube is connected on the joint of bottom, between described sealed tube and outer tube, form annular space, on fluid pipe nipple, be provided with the fluid joint that is communicated to above-mentioned annular space.
2. a kind of ultra-long-stroke well mouth sealing device according to claim 1, is characterized in that, the inner tight cover of described sealed tube has sealed plunger to form hard sealing and guarantees sealed plunger moving up and down freely in sealed tube inside.
3. a kind of ultra-long-stroke well mouth sealing device according to claim 2, it is characterized in that, described sealed plunger knock-off joint on self upper end adopts forms soft seal with sealed tube inwall, sealed plunger knock-off joint and sealed tube inwall formation soft seal under self lower end adopts.
4. a kind of ultra-long-stroke well mouth sealing device according to claim 3, is characterized in that, between described upper knock-off joint and lower knock-off joint and sealed tube inwall, is provided with joint ring, and joint ring outer cover has the collar.
5. a kind of ultra-long-stroke well mouth sealing device according to claim 1, is characterized in that, between described outer tube upper end and fluid pipe nipple lower end, is connected with hanger.
6. a kind of ultra-long-stroke well mouth sealing device according to claim 1, is characterized in that, described sealed tube is that upper sealed tube and lower seal pipe connect and compose by sealed fitting each other.
7. a kind of ultra-long-stroke well mouth sealing device according to claim 6, is characterized in that, between described sealed fitting inside and upper-lower seal pipe, is provided with sealing ring.
8. a kind of ultra-long-stroke well mouth sealing device according to claim 1, is characterized in that, described outer tube is that upper exterior tube and lower outer pipe connect and compose by outer tube joint each other.
9. utilize a kind of ultra-long-stroke well mouth sealing device described in claim 1-8 any one to carry out the method for wellhead sealing, the steps include:
First ultra-long-stroke well mouth sealing device is placed in well head, is connected on oil pipe and is become one with oil pipe by top sub and bottom joint, the upper knock-off joint in sealed tube is connected with oil pumper suspension point by wire rope, and lower knock-off joint is connected with sucker rod;
Then start normal oil pumping operation, sealed plunger and joint ring complete the reciprocating motion of up-down stroke in sealed tube with wire rope, because sealed plunger outer wall and sealed tube inwall form hard sealing, sealed plunger upper and lower side and sealed tube form soft seal, combine two-stage sealing completed the seal operation of ultra-long-stroke well mouth sealing device at well head place by soft or hard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210446186.4A CN103806856A (en) | 2012-11-09 | 2012-11-09 | Ultra-long stroke well head sealing device and sealing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210446186.4A CN103806856A (en) | 2012-11-09 | 2012-11-09 | Ultra-long stroke well head sealing device and sealing method thereof |
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| Publication Number | Publication Date |
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| CN103806856A true CN103806856A (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210446186.4A Pending CN103806856A (en) | 2012-11-09 | 2012-11-09 | Ultra-long stroke well head sealing device and sealing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943146A (en) * | 2021-03-19 | 2021-06-11 | 美钻能源科技(上海)有限公司 | Ultrahigh pressure wellhead metal annulus seal package |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048579A (en) * | 1990-04-24 | 1991-01-16 | 大港石油管理局采油二厂 | Combined multifunctional oil wellhead assembly |
| CN1375617A (en) * | 2002-04-29 | 2002-10-23 | 盘锦金盘科技有限责任公司 | Multiple well interactive autobalance integral intelligent oil pumping unit |
| CN2744828Y (en) * | 2004-06-09 | 2005-12-07 | 张学鲁 | Pumping well polish rod non-filling type sealer |
| CN101029562A (en) * | 2007-04-03 | 2007-09-05 | 大庆油田有限责任公司 | Directed-balanced economical pumping unit |
| CN101550817A (en) * | 2009-05-20 | 2009-10-07 | 大庆油田有限责任公司 | Hoisting system of stripper well in oil field |
| CN101806202A (en) * | 2010-03-31 | 2010-08-18 | 中国石油大学(华东) | Water drainage and gas production simulated experimental device |
| US20110014064A1 (en) * | 2006-02-01 | 2011-01-20 | Petro Hydraulic Lift System, L.L.C. | Hydraulic oil well pumping apparatus |
| CN202970586U (en) * | 2012-11-09 | 2013-06-05 | 中国石油化工股份有限公司 | Super-long stroke wellhead sealing device |
-
2012
- 2012-11-09 CN CN201210446186.4A patent/CN103806856A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048579A (en) * | 1990-04-24 | 1991-01-16 | 大港石油管理局采油二厂 | Combined multifunctional oil wellhead assembly |
| CN1375617A (en) * | 2002-04-29 | 2002-10-23 | 盘锦金盘科技有限责任公司 | Multiple well interactive autobalance integral intelligent oil pumping unit |
| CN2744828Y (en) * | 2004-06-09 | 2005-12-07 | 张学鲁 | Pumping well polish rod non-filling type sealer |
| US20110014064A1 (en) * | 2006-02-01 | 2011-01-20 | Petro Hydraulic Lift System, L.L.C. | Hydraulic oil well pumping apparatus |
| CN101029562A (en) * | 2007-04-03 | 2007-09-05 | 大庆油田有限责任公司 | Directed-balanced economical pumping unit |
| CN101550817A (en) * | 2009-05-20 | 2009-10-07 | 大庆油田有限责任公司 | Hoisting system of stripper well in oil field |
| CN101806202A (en) * | 2010-03-31 | 2010-08-18 | 中国石油大学(华东) | Water drainage and gas production simulated experimental device |
| CN202970586U (en) * | 2012-11-09 | 2013-06-05 | 中国石油化工股份有限公司 | Super-long stroke wellhead sealing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943146A (en) * | 2021-03-19 | 2021-06-11 | 美钻能源科技(上海)有限公司 | Ultrahigh pressure wellhead metal annulus seal package |
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Application publication date: 20140521 |