CN212716516U - Sealing strip for oil well packing and packing - Google Patents
Sealing strip for oil well packing and packing Download PDFInfo
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- CN212716516U CN212716516U CN202021004833.2U CN202021004833U CN212716516U CN 212716516 U CN212716516 U CN 212716516U CN 202021004833 U CN202021004833 U CN 202021004833U CN 212716516 U CN212716516 U CN 212716516U
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Abstract
The utility model relates to a sealing strip and a packing for an oil well packing, wherein the packing is an annular sealing body, an opening which is convenient to take and place in a packing box is arranged on the annular sealing body, and the inner peripheral surface of the annular sealing body is a sealing surface which is in sealing fit with a polish rod; the annular sealing body is obtained by hot-press molding of the sealing strip. The sealing strip comprises a central elastic body and a peripheral braiding body surrounding the outside of the central elastic body; the central elastic body has certain elasticity and strength and plays a role of a central framework; the peripheral braiding body comprises elastic threads and self-lubricating threads which are braided in a crossed mode, the elastic threads enable the peripheral braiding body to have certain elasticity, the self-lubricating threads are made of self-lubricating materials and have self-lubricating performance, and abrasion caused by friction between the polished rod and the packing can be reduced. The utility model discloses a packing both has good elasticity characteristics, has self-lubricating nature again, is favorable to reducing the wearing and tearing in the packing use, keeps better leakproofness.
Description
Technical Field
The utility model relates to an oil well is sealing strip and packing for packing.
Background
When the oil field adopts the beam-pumping unit to carry out oil recovery production, for avoiding oil gas and output liquid to reveal, the well head is provided with the packing box, installs the packing in the packing box, and the packing seals polished rod and oil pipe's annular space. At present, an O-shaped rubber ring is often adopted as a packing in an oil field, but when the water content of an oil well reaches more than 98% in a water-containing period of the oil field, the O-shaped rubber ring is seriously corroded and abraded by abrasive particles, so that the contact surface of the O-shaped rubber ring and a polished rod cannot keep sealing, and the sealing performance of the packing is lost.
The patent document of the invention of China with the publication number of CN106594281B and publication number of 2018.05.01 discloses a PTFE (polytetrafluoroethylene) packing, which comprises a packing body woven by polytetrafluoroethylene materials, a silicon rubber main body and an isolating membrane. The isolating membrane is prepared by the steps of lubricating, mixing, screening, modifying, mixing, extruding, calendering, removing aviation kerosene, stretching, curing and deoiling, the isolating membrane is covered outside the silicon rubber main body, and the packing main body is wrapped outside the isolating membrane to form the surface layer of the packing.
The packing body is woven by the braided wire that polytetrafluoroethylene processing was made and is formed, the braided wire adopts banded polytetrafluoroethylene film along width direction coiling shaping. The band-shaped polytetrafluoroethylene film for preparing the braided wire is prepared by the following method: mixing, screening, preforming, extruding, calendering, removing a lubricant, stretching and shaping, slitting, twisting and manufacturing. The surface layer of the PTFE packing is a packing body made of polytetrafluoroethylene materials, and due to the good water repellency and self-lubricating property of the polytetrafluoroethylene, the PTFE packing is not easy to corrode and wear. But this PTFE packing top layer makes the elasticity on packing top layer relatively poor by polytetrafluoroethylene completely, causes the relatively poor problem of leakproofness.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sealing strip for an oil well packing, which is used for solving the problem of poor elasticity caused by the coating of polytetrafluoroethylene on the outer layer of the existing packing;
the utility model aims at providing a packing still for solve the outer relatively poor problem of elasticity that causes through the polytetrafluoroethylene cladding of present packing.
The sealing strip for the oil well packing adopts the following technical scheme;
the sealing strip for oil well packing includes:
a central elastomer;
the peripheral weaving body is wound on the periphery of the central elastic body and comprises elastic threads and self-lubricating threads which are woven in a crossed mode, and the self-lubricating threads are made of self-lubricating materials.
Has the advantages that: the sealing strip for the oil well packing comprises a central elastic body and a peripheral braiding body, wherein the central elastic body can form a central framework of the sealing strip for the oil well packing and enables the central framework to have certain elasticity; the peripheral weaving body contains elastic threads and self-lubricating threads, so that the peripheral weaving body has good elasticity and self-lubricating property; to sum up, the whole sealing strip for the oil well packing has better elasticity and is not easy to wear.
Further, the elastic thread is made of a rubber material.
Has the advantages that: the rubber material is low in price, and the manufacturing cost of the sealing strip for the oil well packing is reduced by keeping the elasticity of the elastic wire.
Further, the self-lubricating wire is made of polytetrafluoroethylene.
Has the advantages that: when the sealing strip for the oil well packing is used for the use of the packing, the polytetrafluoroethylene has self-lubricating property due to extremely low friction coefficient, so that the abrasion of the packing and a polished rod in the friction process is effectively reduced; in addition, the polytetrafluoroethylene also has water repellency, which is beneficial to reducing the erosion to the packing when the water content of the oil product is higher, so that the packing has certain anti-erosion capability.
Further, the central elastic body is made of a rubber material.
Has the advantages that: the rubber material is low in price, and the manufacturing cost of the sealing strip for the oil well packing can be reduced by keeping the elasticity of the central elastic body.
The packing of the utility model adopts the following technical proposal;
the packing includes:
annular seal body: the inner circumferential surface of the annular sealing body is a sealing surface which is used for being matched with the polish rod in a sealing way, and the annular sealing body is formed by hot pressing of a sealing strip;
the sealing strip comprises a central elastic body and a peripheral braiding body;
the peripheral braiding body is wound on the periphery of the central elastic body and comprises elastic threads and self-lubricating threads which are braided in a crossed mode, and the self-lubricating threads are made of self-lubricating materials.
Has the advantages that: the opening is convenient for change the annular seal body. The sealing strip comprises a central elastic body and a peripheral weaving body, wherein the central elastic body can form a central framework of the sealing strip and enables the central framework to have certain elasticity; the peripheral weaving body contains elastic threads and self-lubricating threads, so that the peripheral weaving body has good elasticity and self-lubricating property; by integrating the technical scheme, the whole sealing strip has good elasticity and is not easy to wear, and the packing has good elasticity and is not easy to wear.
Further, the elastic thread is made of a rubber material.
Has the advantages that: the rubber material is low in price, and the manufacturing cost of the sealing strip is reduced while the elasticity of the elastic thread is kept.
Further, the self-lubricating wire is made of polytetrafluoroethylene.
Has the advantages that: the polytetrafluoroethylene has extremely low friction coefficient and self-lubricating property, and effectively reduces the abrasion of the packing and the polish rod in the friction process; in addition, the polytetrafluoroethylene also has water repellency, which is beneficial to reducing the erosion to the packing when the water content of the oil product is higher, so that the packing has certain anti-erosion capability.
Further, the central elastic body is made of a rubber material.
Has the advantages that: the rubber material is low in price, and the manufacturing cost of the packing is reduced while the elasticity of the central elastic body is kept.
Furthermore, the two abutting surfaces at the opening are inclined surfaces forming a set included angle with the radial plane of the annular sealing body.
Has the advantages that: the inclined plane opening structure is simple and practical, and the processing is convenient.
Further, the set included angle is 45 degrees.
Has the advantages that: the 45-degree included angle is more convenient for processing the opening.
Drawings
Fig. 1 is a schematic structural diagram of a packing set according to an embodiment 1 of the present invention;
fig. 2 is a schematic view of the internal structure of a packing set according to an embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a packing set according to an embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of a packing set according to an embodiment 3 of the present invention;
in fig. 1 and 2: 1-packing; 2-opening; 3-inner peripheral surface; 4-outer edge; 5-a central elastomer; 6-self-lubricating thread; 7-elastic threads; 8-a central hole;
in fig. 3: 21-packing; 22-an opening;
in fig. 4: 31-packing; 32-opening.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model discloses a concrete embodiment 1 of packing:
the utility model discloses a packing, as shown in fig. 1, packing 1 is the annular seal, and this annular seal has a centre bore 8 that supplies the polished rod to pass, and the pore wall of centre bore 8 is the inner peripheral surface 3 of annular seal promptly and the sealed cooperation of polished rod in order to prevent that the oil from spilling along the polished rod. The outer edge 4 of the annular sealing body is tightly attached to the inner wall of the packing box.
An opening 2 is arranged on the packing 1 so that the packing 1 can be taken out or put into a packing box. Two butt joint surfaces at the opening 2 and the radial plane of the annular sealing body form an included angle of 45 degrees.
The annular sealing strip is obtained by hot-press molding of the sealing strip. As shown in fig. 2, the sealing strip includes a central elastic body 5 and a peripheral woven body, the peripheral woven body is woven outside the central elastic body 5, the central elastic body 5 is made of rubber material, on one hand, the central elastic body 5 is used as a central framework of the sealing strip to enable the sealing strip to have certain strength, and on the other hand, the central elastic body made of rubber material enables the sealing strip to have certain elasticity to facilitate sealing.
The periphery weaving body is formed by alternately weaving elastic threads 7 and self-lubricating threads 6, has elasticity and self-lubricating property, can reduce abrasion caused by friction of the packing 1 and a polished rod, and is convenient to keep the packing sealed. The specific weaving technology of the peripheral weaving body is the prior art, for example, the weaving technology similar to aramid packing can be adopted, and aramid packing is woven by mixing aramid and other materials.
The elastic wire 7 is made of rubber materials, the rubber is low in price and rich in elasticity, and the manufacturing cost of the packing is favorably reduced.
The self-lubricating thread 6 is made of polytetrafluoroethylene, the polytetrafluoroethylene material is small in friction coefficient and has self-lubricating property, abrasion caused by friction between the peripheral woven body and the polished rod can be effectively reduced, and in addition, the polytetrafluoroethylene has water repellency and can reduce erosion of oil with high water content to the peripheral woven body.
The periphery weaving body of the sealing strip is formed by alternately and mixedly weaving rubber strips and polytetrafluoroethylene fibers, and then heating and pressing the rubber strips and the polytetrafluoroethylene fibers to form the packing 1. After hot press molding, the polytetrafluoroethylene has better high temperature resistance, and the self-lubricating property and the water repellency of the polytetrafluoroethylene are not influenced. The rubber can better exert the overall elasticity and has good supporting effect after being subjected to thermal shrinkage molding.
The utility model discloses a packing is when using, in the packing box of adding oil well head with the packing, two adjacent packing openings stagger 120 degrees or 180 degrees about needing to guarantee, treat that the packing is whole to be placed and accomplish the back, compress tightly the packing box and press the cap, ensure that the elasticity is suitable, make the packing closely cooperate with the inner wall of polished rod and packing box respectively, reach sealed effect. When the polished rod moves up and down, the abrasion of the polished rod on the packing can be slowed down by the self-lubricating line, the packing can be kept elastic by the central elastic body and the elastic line, and the sealing performance and the service life of the packing are improved.
The utility model discloses effectively combine the material characteristic of polytetrafluoroethylene and rubber, provide a packing that resistance to wears, elasticity are good.
The utility model discloses a concrete embodiment 2 of packing:
the difference from embodiment 1 is that, as shown in fig. 3, the opening of the annular sealing body is T-shaped, and the opening 22 of the packing 21 is T-shaped.
The utility model discloses a concrete embodiment 3 of packing:
the difference from embodiment 1 is that the opening of the annular seal body is wedge-shaped as shown in fig. 4. The opening 32 of the packing 31 is wedge-shaped.
The utility model discloses a embodiment 4 of packing:
the difference from embodiment 1 is that the opening forms an angle of 30 degrees with the radial plane of the annular seal body. In other embodiments, the opening may be angled at other angles, such as 10 degrees, 20 degrees, etc., relative to a radial plane of the annular seal body.
The utility model discloses a concrete embodiment of sealing strip for oil well packing, the sealing strip for oil well packing in this embodiment with the utility model discloses a sealing strip structure in an arbitrary concrete embodiment of packing is the same, and here is no longer repeated.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Sealing strip for oil well packing, characterized by includes:
a central elastomer;
the peripheral weaving body is wound on the periphery of the central elastic body and comprises elastic threads and self-lubricating threads which are woven in a crossed mode, and the self-lubricating threads are made of self-lubricating materials.
2. The seal strip for oil well packing according to claim 1, wherein the elastic wire is made of a rubber material.
3. The seal strip for oil well packing according to claim 1 or 2, wherein the self-lubricating wire is made of polytetrafluoroethylene.
4. The seal strip for oil well packing according to claim 1 or 2, wherein the central elastic body is made of a rubber material.
5. Packing, characterized by includes:
annular seal body: the inner circumferential surface of the annular sealing body is a sealing surface which is used for being matched with the polish rod in a sealing way, and the annular sealing body is formed by hot pressing of a sealing strip;
the sealing strip comprises a central elastic body and a peripheral braiding body;
the peripheral braiding body is wound on the periphery of the central elastic body and comprises elastic threads and self-lubricating threads which are braided in a crossed mode, and the self-lubricating threads are made of self-lubricating materials.
6. The packing set of claim 5, wherein the resilient wire is made of a rubber material.
7. The packing set of claim 5 or 6, wherein the self-lubricating wire is made of polytetrafluoroethylene.
8. The packing set of claim 5 or 6, wherein the central resilient body is made of a rubber material.
9. The packing set of claim 5 or 6 wherein the opposing surfaces at the opening are beveled at a set angle to a radial plane of the annular seal body.
10. The packing set of claim 9, wherein the set angle is 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021004833.2U CN212716516U (en) | 2020-06-04 | 2020-06-04 | Sealing strip for oil well packing and packing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021004833.2U CN212716516U (en) | 2020-06-04 | 2020-06-04 | Sealing strip for oil well packing and packing |
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| Publication Number | Publication Date |
|---|---|
| CN212716516U true CN212716516U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021004833.2U Active CN212716516U (en) | 2020-06-04 | 2020-06-04 | Sealing strip for oil well packing and packing |
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| CN (1) | CN212716516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715384A (en) * | 2021-08-30 | 2021-11-30 | 海宁市力佳隆门窗密封条有限公司 | Processing method of aluminum-plastic door and window sealing strip |
-
2020
- 2020-06-04 CN CN202021004833.2U patent/CN212716516U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715384A (en) * | 2021-08-30 | 2021-11-30 | 海宁市力佳隆门窗密封条有限公司 | Processing method of aluminum-plastic door and window sealing strip |
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