CN103244068A - Pressing cap structure of hydraulic jar - Google Patents

Pressing cap structure of hydraulic jar Download PDF

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Publication number
CN103244068A
CN103244068A CN 201310181615 CN201310181615A CN103244068A CN 103244068 A CN103244068 A CN 103244068A CN 201310181615 CN201310181615 CN 201310181615 CN 201310181615 A CN201310181615 A CN 201310181615A CN 103244068 A CN103244068 A CN 103244068A
Authority
CN
China
Prior art keywords
connecting pin
hole
screw
pressure cap
cap structure
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
Application number
CN 201310181615
Other languages
Chinese (zh)
Inventor
李道贵
潘大东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Wangjiang Industry Co Ltd
Original Assignee
Chongqing Wangjiang Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing Wangjiang Industry Co Ltd filed Critical Chongqing Wangjiang Industry Co Ltd
Priority to CN 201310181615 priority Critical patent/CN103244068A/en
Publication of CN103244068A publication Critical patent/CN103244068A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a pressing cap structure of a hydraulic jar. The pressing cap structure of the hydraulic jar comprises a pressing cap (1) for limiting axial movement of an overflow piston (6), a jarring hydraulic cylinder (4) and a mandril (5). The pressing cap (1) is sleeved on the mandril (5) located in the jarring hydraulic cylinder (4), a screw hole (1-1) is arranged in the radial direction of the pressing cap (1), and a screw (3) in the screw hole (1-1) is tightened to enable the pressing cap (1) to be fixedly connected with the mandril (5). The pressing cap structure of the hydraulic jar is characterized by comprising a connection pin (2), a through hole (1-2) is arranged on the pressing cap (1) in the direction perpendicular to the screw hole (1-1), the screw (3) is provided with a groove (3-1) matched with the through hole (1-2), and the connection pin (2) penetrates through the through hole (1-2) to be fixedly connected with the groove (3-1). The pressing cap structure of the hydraulic jar has the advantages of being capable of avoiding loosening and long in service life.

Description

A kind of fluid pressure type bumper jar pressure cap structure
Technical field
The present invention relates to the fluid pressure type bumper jar, be specifically related to a kind of fluid pressure type bumper jar pressure cap structure.
Background technology
Pressure cap is the core part on the fluid pressure type bumper jar in the petroleum machinery product, and it mainly acts on is the axially movable gap of restriction overflow piston, thereby guarantees the jarring function of fluid pressure type bumper jar.At present, common both at home and abroad fluid pressure type bumper jar pressure cap structure is referring to shown in Figure 1, comprise for restriction overflow piston 6 axially movable pressure caps 1, jarring fluid cylinder 4 and axle 5, pressure cap 1 is set on the axle 5 that is positioned at jarring fluid cylinder 4, pressure cap 1 radially be provided with screw 1-1, by the screw of tightening among the screw 1-1 3 pressure cap 1 is fixedlyed connected with axle 5.This fluid pressure type bumper jar pressure cap structure, owing to by the screw of tightening among the screw 1-1 3 pressure cap 1 is fixedlyed connected with axle 5, thereby well rear pressing cap 1 gone into by the fluid pressure type bumper jar because the vibration during drilling tool work and the jarring of this fluid pressure type bumper jar, cause its screw 3 loosening withdrawing from easily, pull jarring fluid cylinder 4, cause fluid pressure type bumper jar generation failure phenomenon, operational failure, the life-span is shorter.For this reason, need often to change jarring fluid cylinder 4, to guarantee operate as normal, increased use cost so again.
Summary of the invention
The technical problem to be solved in the present invention provides and a kind ofly prevents from becoming flexible, the life-span is higher, lower-cost fluid pressure type bumper jar pressure cap structure.
For solving the problems of the technologies described above, the present invention adopts following technical scheme;
Fluid pressure type bumper jar pressure cap structure of the present invention, comprise for the axially movable pressure cap of restriction overflow piston, jarring fluid cylinder and axle, pressure cap is set on the axle that is positioned at the jarring fluid cylinder, pressure cap radially be provided with screw, by the screw of tightening in the screw pressure cap is fixedlyed connected with axle, it is characterized in that: also comprise connecting pin, on pressure cap, have through hole perpendicular to the screw direction, have the groove that matches with this through hole at screw, described connecting pin passes through hole fixedlys connected with groove.
Further, described connecting pin is resilient key;
Further, described connecting pin is hollow body;
Further again, described connecting pin is the hollow body of a side opening;
In addition further, described connecting pin and through hole interference fit;
Further again, described connecting pin cooperates with trench gap.
Compared with prior art, fluid pressure type bumper jar pressure cap structure of the present invention has following beneficial effect:
1, since described connecting pin pass through hole and fixedly connected with groove: the direction to the screw rotation locks, and can effectively prevent screw owing to produce loosening when operational vibration and jarring and radially withdraw from.
2, because described connecting pin is hollow body: connecting pin can suitably dwindle the external diameter of connecting pin according to through hole internal diameter size when passing through hole, guarantees to pass through hole smoothly, and can guarantee the magnitude of interference between the two.
3, because described connecting pin is the hollow body of a side opening, connecting pin is when passing through hole, and a side opening of connecting pin can provide enough reducing spaces, can suitably dwindle the connecting pin external diameter according to through hole internal diameter size, guarantee to pass smoothly through hole, and guarantee the magnitude of interference between the two.
4, because described connecting pin and through hole interference fit, connecting pin is withdrawed from vibrating and not taking place to become flexible during jarring.
5, since described connecting pin cooperate with trench gap, thereby: connecting pin can provide enough spaces to allow connecting pin pass groove again, thereby connecting pin is passed by the other end of through hole after penetrating from an end of through hole.
Description of drawings
Fig. 1 is prior art fluid pressure type bumper jar pressure cap structure master sectional view;
Fig. 2 is the sectional view of Fig. 1;
Fig. 3 is fluid pressure type bumper jar pressure cap structure master sectional view of the present invention;
Fig. 4 is the sectional view of Fig. 3;
Fig. 5 is pressure cap structure master sectional view;
Fig. 6 is the sectional view of Fig. 5;
Fig. 7 is the connecting pin structural front view;
Fig. 8 is the lateral view of Fig. 7;
Fig. 9 is the bolt structure schematic diagram;
Among the figure, pressure cap 1, screw 1-1, through hole 1-2, connecting pin 2, screw 3, groove 3-1, jarring fluid cylinder 4, axle 5, overflow piston 6.
The specific embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
Referring to Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and shown in Figure 9, fluid pressure type bumper jar pressure cap structure of the present invention, comprise for restriction overflow piston 6 axially movable pressure caps 1, jarring fluid cylinder 4 and axle 5, pressure cap 1 is set on the axle 5 that is positioned at jarring fluid cylinder 4, pressure cap 1 radially be provided with screw 1-1, by the screw of tightening among the screw 1-1 3 pressure cap 1 is fixedlyed connected with axle 5, it is characterized in that: also comprise connecting pin 2, on pressure cap 1, have through hole 1-2 perpendicular to screw 1-1 direction, have the groove 3-1 that matches with this through hole 1-2 at screw 3, described connecting pin 2 passes through hole 1-2 fixedlys connected with groove 3-1; Such structure: with connecting pin 2 and through hole 1-2 interference fit, and pass simultaneously on the screw 3 with the connecting pin 2 gapped groove 3-1 that cooperate after, make screw 3 locked on direction of rotation, effectively prevented because when operational vibration and jarring, made screw 3 produce loosening and radially withdraw from and cause screw 3 to pull jarring fluid cylinder 4.
Described connecting pin 2 is resilient key, like this, when connecting pin 2 when passing through hole 1-2 because it be elastomeric material, can suitably dwindle connecting pin 2 external diameters according to through hole 1-2 internal diameter size, through hole 1-2 is passed in assurance smoothly, and can guarantee the magnitude of interference between the two.
Described connecting pin 2 is hollow body; Therefore, when connecting pin 2 when passing through hole 1-2, its hollow body can provide suitable reducing space, makes the external diameter of connecting pin 2 that a little distortion be arranged, and to adapt to through hole 1-2 diameter, guarantees that connecting pin 2 passes through hole 1-2 smoothly.
Described connecting pin 2 is the hollow body of a side opening; Like this: connecting pin 2 is when passing through hole 1-2, and a side opening of connecting pin 2 can provide enough reducing spaces, can suitably dwindle the external diameter of connecting pin 2 according to through hole 1-2 internal diameter size, guarantees to pass smoothly through hole 1-2, and guarantees the magnitude of interference between the two.
Described connecting pin 2 is joined with through hole 1-2 interference; The employing interference is joined, and can make connecting pin 2 can keep fixing state in through hole 1-2, and nonvoluntary movement, thereby has guaranteed that connecting pin 2 is being vibrated and do not taking place loosening during jarring and withdraw from.
Described connecting pin 2 is joined with groove 3-1 gap; Connecting pin 2 adopts the gap to join with groove 3-1, be for after allowing connecting pin 2 penetrate from the end of through hole 1-2, there are enough spaces can allow connecting pin 2 pass groove 3-1 again, thereby connecting pin 2 is passed by the other end of through hole 1-2, thereby guarantee the convenient of assembling and reach the purpose of the screw 3 of locking strip groove 3-1.

Claims (8)

1. fluid pressure type bumper jar pressure cap structure, comprise for restriction overflow piston 6 axially movable pressure caps (1), jarring fluid cylinder (4) and axle (5), pressure cap (1) is set on the axle (5) that is positioned at jarring fluid cylinder (4), pressure cap (1) radially be provided with screw (1-1), by the screw of tightening in the screw (1-1) (3) pressure cap (1) is fixedlyed connected with axle (5), it is characterized in that: also comprise connecting pin (2), upward have through hole (1-2) perpendicular to screw (1-1) direction at pressure cap (1), have the groove (3-1) that matches with this through hole (1-2) at screw (3), described connecting pin (2) passes through hole (1-2) fixedlys connected with groove (3-1).
2. fluid pressure type bumper jar pressure cap structure according to claim 1, it is characterized in that: described connecting pin (2) is resilient key.
3. fluid pressure type bumper jar pressure cap structure according to claim 2, it is characterized in that: described connecting pin (2) is hollow body.
4. fluid pressure type bumper jar pressure cap structure according to claim 3, it is characterized in that: described connecting pin (2) is the hollow body of a side opening.
5. fluid pressure type bumper jar pressure cap structure according to claim 1 is characterized in that: described connecting pin (2) and through hole (1-2) interference fit.
6. fluid pressure type bumper jar pressure cap structure according to claim 1 is characterized in that: described connecting pin (2) and groove (3-1) matched in clearance.
7. according to each described fluid pressure type bumper jar pressure cap structure in the claim 1 to 4, it is characterized in that: described connecting pin (2) is joined with through hole (1-2) interference.
8. according to each described fluid pressure type bumper jar pressure cap structure in the claim 1 to 4, it is characterized in that: described connecting pin (2) and groove (3-1) matched in clearance.
CN 201310181615 2013-05-16 2013-05-16 Pressing cap structure of hydraulic jar Pending CN103244068A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201310181615 CN103244068A (en) 2013-05-16 2013-05-16 Pressing cap structure of hydraulic jar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201310181615 CN103244068A (en) 2013-05-16 2013-05-16 Pressing cap structure of hydraulic jar

Publications (1)

Publication Number Publication Date
CN103244068A true CN103244068A (en) 2013-08-14

Family

ID=48923909

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201310181615 Pending CN103244068A (en) 2013-05-16 2013-05-16 Pressing cap structure of hydraulic jar

Country Status (1)

Country Link
CN (1) CN103244068A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104563938A (en) * 2015-01-04 2015-04-29 杰瑞能源服务有限公司 Continuous shocking tool
CN113279694A (en) * 2021-06-15 2021-08-20 成都高峰石油机械有限公司 Ultrashort bidirectional full-hydraulic drilling jar

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104563938A (en) * 2015-01-04 2015-04-29 杰瑞能源服务有限公司 Continuous shocking tool
CN104563938B (en) * 2015-01-04 2017-04-26 杰瑞能源服务有限公司 Continuous shocking tool
CN113279694A (en) * 2021-06-15 2021-08-20 成都高峰石油机械有限公司 Ultrashort bidirectional full-hydraulic drilling jar
CN113279694B (en) * 2021-06-15 2022-05-20 成都高峰石油机械有限公司 Ultrashort two-way full-hydraulic drilling jar

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WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130814