CN211201847U - Eccentric wear prevention packing for oil extraction - Google Patents
Eccentric wear prevention packing for oil extraction Download PDFInfo
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- CN211201847U CN211201847U CN201921935890.XU CN201921935890U CN211201847U CN 211201847 U CN211201847 U CN 211201847U CN 201921935890 U CN201921935890 U CN 201921935890U CN 211201847 U CN211201847 U CN 211201847U
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Abstract
The utility model relates to a polished rod sealer technical field of oil field beam-pumping unit, in particular to oil recovery is with preventing eccentric wear packing. 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 utility model discloses an at the inside liquid cavity that forms of packing, the packing is changed the degree of difficulty and is reduced, increases packing elastic compensation ability, improves the sealed effect of packing, along with the skew degree of polished rod and well head and automatic adaptation, eliminates the eccentric wear phenomenon, has practiced thrift the use of parent metal, has prolonged the life of packing greatly, simple structure, convenient to use.
Description
The technical field is as follows:
the utility model relates to a polished rod sealer technical field of oil field beam-pumping unit, in particular to oil recovery is with preventing eccentric wear packing.
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 utility model has the following contents:
the to-be-solved technical problem of the utility model is to provide an oil recovery is with preventing eccentric wear packing, the device have realized at the inside liquid cavity that forms of packing, and the packing is changed the degree of difficulty and is reduced, increases packing elastic compensation ability, improves the sealed effect of packing, along with the skew degree of polished rod and well head and automatic adaptation, eliminates the eccentric wear phenomenon, has practiced thrift the use of mother metal, has prolonged the life of packing greatly, simple structure, convenient to 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 utility model adopts the technical proposal that: 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 utility model has the advantages 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 above 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 still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (6)
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, liquid cavity (2) be with packing body (1) shape assorted annular space.
2. 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.
3. The eccentric wear prevention packing for oil recovery according to claim 2, 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.
4. 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.
5. 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).
6. The eccentric wear prevention packing for oil recovery according to claim 5, characterized in that: the depth of the groove (3) is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921935890.XU CN211201847U (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 |
|---|---|---|---|
| CN201921935890.XU CN211201847U (en) | 2019-11-11 | 2019-11-11 | Eccentric wear prevention packing for oil extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211201847U true CN211201847U (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921935890.XU Active CN211201847U (en) | 2019-11-11 | 2019-11-11 | Eccentric wear prevention packing for oil extraction |
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| CN (1) | CN211201847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630205A (en) * | 2019-11-11 | 2019-12-31 | 张程 | Eccentric wear prevention packing for oil extraction |
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2019
- 2019-11-11 CN CN201921935890.XU patent/CN211201847U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630205A (en) * | 2019-11-11 | 2019-12-31 | 张程 | Eccentric wear prevention packing for oil extraction |
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