CN110630205A - Eccentric wear prevention packing for oil extraction - Google Patents
Eccentric wear prevention packing for oil extraction Download PDFInfo
- Publication number
- CN110630205A CN110630205A CN201911096681.5A CN201911096681A CN110630205A CN 110630205 A CN110630205 A CN 110630205A CN 201911096681 A CN201911096681 A CN 201911096681A CN 110630205 A CN110630205 A CN 110630205A
- Authority
- CN
- China
- Prior art keywords
- packing
- liquid cavity
- eccentric wear
- thickness
- wear prevention
- 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.)
- Pending
Links
- 238000012856 packing Methods 0.000 title claims abstract description 109
- 230000002265 prevention Effects 0.000 title claims abstract description 11
- 238000000605 extraction Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 43
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 5
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 7
- 210000004907 gland Anatomy 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to the technical field of polished rod sealers of oil pumping units in oil fields, in particular to an eccentric wear prevention packing for oil extraction. The device comprises two semi-annular packing bodies; the packing body internal design has the liquid cavity, and the liquid cavity intussuseption is filled with filling liquid. The invention realizes that a liquid cavity is formed in the packing, the packing replacement difficulty is reduced, the packing elastic compensation capability is increased, the sealing effect of the packing is improved, the packing automatic adaptation is realized along with the deviation degree of the polished rod and the well head, the eccentric wear phenomenon is eliminated, the use of the parent metal is saved, the service life of the packing is greatly prolonged, the structure is simple, and the use is convenient.
Description
The technical field is as follows:
the invention relates to the technical field of polished rod sealers of oil pumping units in oil fields, in particular to an eccentric wear prevention packing for oil extraction.
Background art:
the polish rod sealer of the pumping unit mainly comprises a packing box at the top of a Christmas tree and a packing in the packing box, along with continuous reciprocating motion of a polish rod, the packing and the contact surface of the polish rod can be abraded and gradually increased, the pressure of a gland of the packing box is increased, the sealing capacity is adjusted, and the packing can not be updated until the pressure is increased.
The packing generates deformation under the action of vertical axial pressure of the gland of the packing box, and radial pressure is generated through deformation, so that the packing and the polish rod are tightly combined, and the sealing effect is achieved. The material of production packing has a lot of, and commonly used rubber packing, polytetrafluoroethylene packing, carbon fiber packing, aramid fiber packing, polyurethane packing, flexible graphite etc. the packing of these materials has embodied following several kinds of defects in the use: firstly, in a long and narrow packing box, the tower-shaped and rectangular packing becomes hard under the long-time extrusion action of the gland and is tightly combined with the inner wall of the packing box, the old packing is difficult to pull out when the packing is replaced, and the operation difficulty of workers is increased; secondly, after the packing is worn and failed, the lost part of the packing is only a friction interface in contact with a polished rod, and more than 95 percent of parent metal of a non-contact surface becomes waste products and is directly thrown away, so that waste is caused; thirdly, the hardness and the strength of the packing parent metal, the elastic compensation capability of the packing parent metal is influenced by the intermolecular resistance, the abrasion consumption of a friction contact surface can only be compensated in a limited way, and the service life of the packing is shortened; fourthly, after the polished rod deviates from the center of the wellhead, the packing is subjected to eccentric wear, and the sealing effect is easily lost too early, so that the service life is shortened.
The invention content is as follows:
the invention aims to solve the technical problem of providing an eccentric wear prevention packing for oil extraction, which realizes the formation of a liquid cavity in the packing, reduces the difficulty in replacing the packing, increases the elastic compensation capacity of the packing, improves the sealing effect of the packing, automatically adapts to the deviation degree of a polished rod and a well head, eliminates the eccentric wear phenomenon, saves the use of a parent metal, greatly prolongs the service life of the packing, and has simple structure and convenient use. The defects that the difficulty of pulling out the packing is high, the elastic compensation capacity of the packing is poor, the packing is too early failed due to eccentric wear of a polish rod, the service life of the packing is short, and the utilization rate of mother materials is low after the packing is failed are overcome.
The technical scheme adopted by the invention is as follows: an anti-eccentric packing for oil extraction comprises two semi-annular packing bodies; the packing body internal design has the liquid cavity, and the liquid cavity intussuseption is filled with filling liquid.
The liquid cavity is an annular space matched with the packing body in shape.
The thickness of the outer side of the top of the packing body from the liquid cavity is smaller than the thickness of the inner side of the top of the packing body from the liquid cavity, the thickness of the circumferential outer side wall of the packing body on the outer side of the liquid cavity is 2mm, and the thickness of the circumferential inner side wall of the packing body on the outer side of the liquid cavity is 5 mm.
The thickness of packing body top outside apart from liquid cavity is 2mm, and the thickness of packing body top inboard apart from liquid cavity is 10 mm.
The filling liquid is one or a mixture of several of methanol, ethanol, glycol and glycerol.
A plurality of grooves are formed in the inner side wall of the packing body.
The depth of the groove is 2 mm.
The invention has the beneficial effects that:
1. the packing replacement difficulty is reduced: when the packing is replaced, after the pressure of a gland of the packing box is relieved, the packing with the liquid cavity is easy to pull out, and the disassembly work intensity is reduced;
2. increase packing elastic compensation ability: the packing is internally filled with filling liquid, and pressure is transmitted to all directions under the pressure of the gland, so that the inner wall of the packing is hooped with the polish rod, the abrasion part can be effectively compensated, and the elastic compensation capacity of the packing is greatly improved;
3. preventing the polished rod from eccentric wear: the inner wall of the packing can be tightly hooped on the surface of the polish rod, the whole contact surface and the polish rod can form a whole, and the whole contact surface deviates along with the deviation of the polish rod in the liquid cavity, so that the eccentric wear phenomenon of the packing and the polish rod is eliminated;
4. the waste of raw materials such as rubber is reduced;
5. the overall economic benefit is improved: due to the extension of the packing replacement period, the number of times of the pumping unit is reduced, the pumping unit is stopped once when the number of times of replacing the packing is reduced, the influence on the crude oil yield caused by the stop is reduced, and the labor intensity of workers is reduced.
Description of the drawings:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the liquid chamber.
The specific implementation mode is as follows:
as shown in fig. 1 and 2, an eccentric wear prevention packing for oil extraction comprises two semi-annular packing bodies 1; packing body 1 internal design has liquid cavity 2, and liquid cavity 2 intussuseption is filled with filling liquid.
The liquid cavity 2 is an annular space matched with the packing body 1 in shape.
The thickness of the outer side of the top of the packing body 1 from the liquid cavity 2 is smaller than the thickness of the inner side of the top of the packing body 1 from the liquid cavity 2, so that the strength of the top of the packing is guaranteed, the packing is used for saving raw materials, and meanwhile, when the packing is replaced, the old packing is easily scratched. The thickness of the circumferential outer side wall of the packing body 1 outside the liquid cavity 2 is 2mm, so that the material consumption of a non-friction contact surface is reduced while the integral strength of the packing is ensured. The packing body 1 outside the liquid cavity 2 has a thickness of 5mm on the inner side wall in the circumferential direction, and provides enough loss for a friction contact surface.
The thickness of the outer side of the top of the packing body 1 from the liquid cavity 2 is 2mm, and the thickness of the inner side of the top of the packing body 1 from the liquid cavity 2 is 10 mm.
The filling liquid is one or a mixture of several of methanol, ethanol, glycol and glycerol. The heat conductivity of the filling liquid can conduct heat generated by friction of the polish rod and the packing to the outer wall of the packing box in time, and the heat dissipation effect is achieved.
Open on 1 inside wall of packing body has a plurality of recesses 3, and recess 3's degree of depth is 2mm, prevents that the packing from appearing the fold after the axial pressurized and influencing sealing performance.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (7)
1. An anti-eccentric wear packing for oil extraction comprises two semi-annular packing bodies (1); the method is characterized in that: packing body (1) internal design has liquid cavity (2), and liquid cavity (2) intussuseption is filled with filling liquid.
2. The eccentric wear prevention packing for oil recovery according to claim 1, characterized in that: the liquid cavity (2) is an annular space matched with the packing body (1) in shape.
3. The eccentric wear prevention packing for oil recovery according to claim 1, characterized in that: the thickness of packing body (1) top outside apart from liquid cavity (2) is less than the thickness of packing body (1) top inboard apart from liquid cavity (2), and packing body (1) the periphery outside lateral wall thickness 2mm in the liquid cavity (2) outside, packing body (1) the circumference inside lateral wall thickness 5mm in the liquid cavity (2) outside.
4. The anti-eccentric packing set for oil recovery according to claim 3, characterized in that: the thickness of packing body (1) top outside apart from liquid cavity (2) is 2mm, and the thickness of packing body (1) top inboard apart from liquid cavity (2) is 10 mm.
5. The eccentric wear prevention packing for oil recovery according to claim 1, characterized in that: the filling liquid is a mixture formed by mixing one or more of methanol, ethanol, glycol and glycerol.
6. The eccentric wear prevention packing for oil recovery according to claim 1, characterized in that: a plurality of grooves (3) are formed in the inner side wall of the packing body (1).
7. The eccentric wear prevention packing for oil recovery according to claim 6, characterized in that: the depth of the groove (3) is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096681.5A CN110630205A (en) | 2019-11-11 | 2019-11-11 | Eccentric wear prevention packing for oil extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096681.5A CN110630205A (en) | 2019-11-11 | 2019-11-11 | Eccentric wear prevention packing for oil extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110630205A true CN110630205A (en) | 2019-12-31 |
Family
ID=68979412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911096681.5A Pending CN110630205A (en) | 2019-11-11 | 2019-11-11 | Eccentric wear prevention packing for oil extraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110630205A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2505640Y (en) * | 2001-11-02 | 2002-08-14 | 江汉石油钻头股份有限公司 | High elastic grommet with liquid core |
| CN201416404Y (en) * | 2008-11-06 | 2010-03-03 | 姚良新 | Special-shaped packing of universal adjustment wellhead packing box |
| CN105937380A (en) * | 2016-07-14 | 2016-09-14 | 哈尔滨理工大学 | Automatic-compensating sealing packing box |
| CN205895169U (en) * | 2016-08-11 | 2017-01-18 | 成都振剑石油科技有限公司 | Packing is right to combined type beam -pumping unit polished rod |
| CN106958431A (en) * | 2017-05-02 | 2017-07-18 | 荆州市翔龙石油科技有限公司 | A kind of environmental-protecting and high-efficient type polished rod sealer and its packing replacing method |
| US20190017342A1 (en) * | 2016-01-08 | 2019-01-17 | Licheng Yu | Wellhead sealing device of sucker-rod pumping machine |
| CN211201847U (en) * | 2019-11-11 | 2020-08-07 | 张程 | Eccentric wear prevention packing for oil extraction |
-
2019
- 2019-11-11 CN CN201911096681.5A patent/CN110630205A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2505640Y (en) * | 2001-11-02 | 2002-08-14 | 江汉石油钻头股份有限公司 | High elastic grommet with liquid core |
| CN201416404Y (en) * | 2008-11-06 | 2010-03-03 | 姚良新 | Special-shaped packing of universal adjustment wellhead packing box |
| US20190017342A1 (en) * | 2016-01-08 | 2019-01-17 | Licheng Yu | Wellhead sealing device of sucker-rod pumping machine |
| CN105937380A (en) * | 2016-07-14 | 2016-09-14 | 哈尔滨理工大学 | Automatic-compensating sealing packing box |
| CN205895169U (en) * | 2016-08-11 | 2017-01-18 | 成都振剑石油科技有限公司 | Packing is right to combined type beam -pumping unit polished rod |
| CN106958431A (en) * | 2017-05-02 | 2017-07-18 | 荆州市翔龙石油科技有限公司 | A kind of environmental-protecting and high-efficient type polished rod sealer and its packing replacing method |
| CN211201847U (en) * | 2019-11-11 | 2020-08-07 | 张程 | Eccentric wear prevention packing for oil extraction |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |