CN205806459U - A kind of bidirectional high-pressure seals composite piston - Google Patents
A kind of bidirectional high-pressure seals composite piston Download PDFInfo
- Publication number
- CN205806459U CN205806459U CN201620709552.4U CN201620709552U CN205806459U CN 205806459 U CN205806459 U CN 205806459U CN 201620709552 U CN201620709552 U CN 201620709552U CN 205806459 U CN205806459 U CN 205806459U
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- China
- Prior art keywords
- cylinder
- piston
- copper alloy
- piston body
- seal
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Abstract
The utility model discloses a kind of bidirectional high-pressure and seal composite piston.Including piston body (1)；It is provided with flowing hole (2) in piston body (1), in flowing hole (2), is provided with female thread (3) and seal boss (4)；Piston body (1) outer cylinder one end is hexagonal prism (5), and the other end is cylinder (6), and cylinder (6) end face is sealing surface (7)；The outer cylinder of cylinder (6) is provided with one group of seal groove (8), and cylinder outer cylinder remaining surface in addition to one group of seal groove (8) is provided with copper alloy layer (9).The hardness covering bit copper alloy outside this utility model is softer relative to the hardness of outside fluid cylinder, protects the safety of matched working surface.The area that piston exterior covers bit copper alloy is relatively big, and uses wear-resistant copper alloy, reaches to improve the purpose in piston service life.This utility model is easy to use, compact conformation, can fully meet the use requirement of the drilling jar of current all specifications.
Description
Technical field
This utility model relates to a kind of bidirectional high-pressure and seals composite piston, belongs in drilling equipment hydraulic pressure in drilling jar
The piston technical field of device.
Background technology
Along with modern petroleum and gas extraction dynamics continue to increase, drilling jar usage amount in exploitation is the most not
Disconnected increase, at present, the production technique of petroleum and natural gas improves constantly, and proposes higher to the service life of drilling jar
Requirement.Existing drilling jar piston seal is one of principal element of restriction raising in service life.
, there are following two aspect problems in original piston seal:
1. piston is with outside fluid cylinder motor process, and owing to both of which is alloy steel material, and hardness is higher, easily
There is the situation of outside fluid cylinder seal operation surface tear.Cause piston seal failure.
In order to avoid the situation of surface tear during use, usual piston and outside fluid cylinder use bigger gap to add support knot
Structure, bigger gap makes the impurity in drilling mud be easily accessible in gap, and supporting construction exists quick abrasion, and life-span low grade lacks
Fall into.The abrasion of supporting construction, will result in fluid sealant part in use by bigger unbalanced force, in unbalanced force effect
Under, often there is abnormal destruction in fluid sealant part, causes piston seal failure.
The appearance of both the above situation, once causes piston seal failure, causes pressure release, and drilling jar i.e. cannot work
Make.Do not reach the projected life of drilling jar.
Summary of the invention
The purpose of this utility model is, it is provided that a kind of bidirectional high-pressure seals composite piston.To improve the resistance to of piston seal
Expenditure, it is ensured that drilling jar reaches projected life, overcomes prior art not enough.
The technical solution of the utility model:
A kind of bidirectional high-pressure seals composite piston, including piston body；Flowing hole it is provided with, in being provided with in flowing hole in piston body
Screw thread and seal boss；Piston body outer cylinder one end is hexagonal prism, and the other end is cylinder, and cylinder end face is sealing surface；Cylinder
Outer cylinder is provided with one group of seal groove, and cylinder outer cylinder remaining surface in addition to one group of seal groove is provided with copper alloy layer.
In aforementioned piston, described piston body is high-mechanical property steel alloy product.
In aforementioned piston, described copper alloy layer is that wear-resistant copper alloy covers layer.
In aforementioned piston, the thickness of described copper alloy layer is 1～2.5mm.
In aforementioned piston, the hardness of described copper alloy layer is less than the hardness of outside fluid cylinder.
Compared with prior art, this utility model is while ensureing bonding strength when using, and bit copper alloy is covered in outside
Hardness softer relative to the hardness of outside fluid cylinder, protect the safety of matched working surface.This utility model passes through
The improvement of structure, makes piston exterior cover the area of bit copper alloy relatively greatly, and uses wear-resistant copper alloy, reaches to improve piston and uses
The purpose in life-span.Time actually used, outside fluid cylinder seal operation surface is minimum with the fit clearance of piston, can fully ensure that sealing
The working environment of parts, it is achieved the uniformity of stress and concordance during work, improves and seals parts and use the cycle.This practicality is new
Type is easy to use, compact conformation, can fully meet the use requirement of the drilling jar of current all specifications.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the schematic diagram in this utility model fluid cylinder mounted externally.
Being labeled as in figure: 1-piston body, 2-flowing hole, 3-female thread, 4-seal boss, 5-hexagonal prism, 6-cylinder, 7-
Sealing surface, 8-seal groove, 9-copper alloy layer, 10-connecting rod, 11-end-face seal ring, 12-connecting rod sealing ring, 13-slides close
Seal, the outside fluid cylinder of 14-.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings, but not as new to this practicality
Any restriction of type.
A kind of bidirectional high-pressure seals composite piston, including piston body 1；It is provided with flowing hole 2 in piston body 1, sets in flowing hole 2
There are female thread 3 and seal boss 4；Piston body 1 outer cylinder one end is hexagonal prism 5, and the other end is cylinder 6, and cylinder 6 end face is for sealing
Face 7；The outer cylinder of cylinder 6 is provided with one group of seal groove 8, and cylinder outer cylinder remaining surface in addition to one group of seal groove 8 is provided with copper and closes
Layer gold 9.Piston body 1 is high-mechanical property steel alloy product.Copper alloy layer 9 covers layer for wear-resistant copper alloy.Copper alloy layer 9
Thickness is 1～2.5mm.The hardness of copper alloy layer 9 is less than the hardness of outside fluid cylinder.
Embodiment
The structure of this example piston is as it is shown in figure 1, include piston body 1；Piston body 1 uses high-mechanical property steel alloy to make.
Flowing hole 2 it is provided with, to ensure that the mud in drilling rod can pass through in piston body 1；Female thread 3 and close it is provided with in flowing hole 2
Envelope boss 4；Female thread 3 is for being connected with the external screw thread in the connecting rod 10 of drilling jar, and seal boss 4 is used for and connecting rod
The end-face seal ring 11 of 10 end faces coordinates liquid seal in drilling rod, and piston body 1 outer cylinder one end is hexagonal prism 5, for for even
Connect screw thread and moment of torsion is provided, it is ensured that connect reliably screwing of screw thread.The other end is cylinder 6, and cylinder 6 end face is sealing surface 7, for
The connecting rod sealing ring 12 of connecting rod 10 end face coordinates liquid seal in drilling rod.The outer cylinder of cylinder 6 is provided with one group of seal groove
8, the hydraulic oil being pointed in outside fluid cylinder 14 for installing sliding ring 13 seals.Sliding ring 13 includes a pair
Symmetrically arranged BA RunddichtringO and a pair O RunddichtringO add double back-up ring structure.Seal structures by two kinds to cooperate realization
Two way seal.Cylinder outer cylinder remaining surface in addition to one group of seal groove 8 is provided with copper alloy layer 9, and copper alloy layer 9 is wear-resistant copper
Alloy covers layer, and the thickness of copper alloy layer 9 is 1～2.5mm.The hardness of copper alloy layer 9 is less than the hardness of outside fluid cylinder.
Fig. 2 is the schematic diagram in piston of the present utility model fluid cylinder mounted externally 14.When specifically installing, first in connecting rod
End-face seal ring 11 and connecting rod sealing ring 12 is installed, then by the external screw thread of connecting rod 10 termination and piston body 1 on 10
Female thread 3 spin.Installing sliding ring 13 the most again in the seal groove 8 of piston body 1, sliding ring 13 includes a pair
BA RunddichtringO and a pair O RunddichtringO add double back-up ring structure.A pair BA RunddichtringO should be symmetrically installed；The most again by piston body
1 inserts in outside fluid cylinder 14 together with connecting rod 10.Then piston body 1 pulls connecting rod 10 back and forth, it should be ensured that piston body 1 is permissible
Slide freely in outside fluid cylinder 14, it is impossible to have catching phenomenon.Install.
This utility model is easy to use, compact conformation, can fully meet the making of drilling jar of current all specifications
With requiring.
Claims (5)
1. bidirectional high-pressure seals a composite piston, including piston body (1)；It is characterized in that: in piston body (1), be provided with stream
Hole (2), is provided with female thread (3) and seal boss (4) in flowing hole (2)；Piston body (1) outer cylinder one end is hexagonal prism (5), separately
One end is cylinder (6), and cylinder (6) end face is sealing surface (7)；The outer cylinder of cylinder (6) is provided with one group of seal groove (8), outside cylinder
Cylinder remaining surface in addition to one group of seal groove (8) is provided with copper alloy layer (9).
The most according to claim 1, bidirectional high-pressure seals composite piston, it is characterised in that: described piston body (1) is high machinery
Property alloy steelwork.
The most according to claim 1, bidirectional high-pressure seals composite piston, it is characterised in that: described copper alloy layer (9) is high resistance to
Mill copper alloy covers layer.
The most according to claim 2, bidirectional high-pressure seals composite piston, it is characterised in that: the thickness of described copper alloy layer (9)
It is 1～2.5mm.
The most according to claim 2, bidirectional high-pressure seals composite piston, it is characterised in that: the hardness of described copper alloy layer (9)
Hardness less than outside fluid cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620709552.4U CN205806459U (en) | 2016-07-07 | 2016-07-07 | A kind of bidirectional high-pressure seals composite piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620709552.4U CN205806459U (en) | 2016-07-07 | 2016-07-07 | A kind of bidirectional high-pressure seals composite piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205806459U true CN205806459U (en) | 2016-12-14 |
Family
ID=58140223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620709552.4U Active CN205806459U (en) | 2016-07-07 | 2016-07-07 | A kind of bidirectional high-pressure seals composite piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205806459U (en) |
-
2016
- 2016-07-07 CN CN201620709552.4U patent/CN205806459U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |