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Externally-adjusting spring jar

A jar and jarring technology, which is applied in wellbore/well components, earthwork drilling, vibration generating devices, etc., can solve the problems of small jarring force, moderate jarring force of tubular jars, and complicated processing. , to achieve the effect of convenient operation, strong shock force and simple structure design

Inactive Publication Date: 2016-12-07
BAOJI JINHUI OILFIELD MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the jars we know include chain jars, tube jars, hydraulic jars, articulated jars and ordinary spring jars, but hydraulic jars are complicated to process and inconvenient to operate. , the price is expensive; the shock force of the tube jar is relatively moderate and difficult to control; the stroke of the joint jar is small, and the shock force generated is small; the shock force of the chain jar is not easy to control; the ordinary spring shock In terms of adjusting the force value, it is necessary to disassemble the connection between the jar and the tool string, and use the force adjustment tool to adjust the force value, which is not convenient, fast, and labor-intensive

Method used

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  • Externally-adjusting spring jar
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  • Externally-adjusting spring jar

Examples

Experimental program
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Effect test

Embodiment Construction

[0020] like Figures 1 to 4 As shown, the externally adjustable spring jar of the present invention includes a fishing neck 1, a jarring rod 2, a sleeve 3, a connecting nipple 4, a jarring connecting rod 5, an extension rod 6, an inner adjusting rod 7 and a lower joint 8.

[0021] The fishing neck 1 has a rod-shaped structure, its upper end is connected with an external tool string, and its lower end is provided with a fishing neck screw hole 11 along the radial direction.

[0022] The upper end of the shock rod 2 is sleeved inside the lower end of the fishing neck 1 and a screw mounting groove 21 is provided in the radial direction. A set screw 22 is fixed to the lower end of the fishing neck 1; at the same time, the inner wall of the lower end of the shock rod 2 is provided with threads, and the middle section is provided with a ventilating groove 23 in the radial direction, and the lower end of the shock rod 2 is positioned at the bottom of the ventilating groove 23. The r...

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PUM

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Abstract

The invention relates to an externally-adjusting spring jar. The externally-adjusting spring jar comprises a fishing neck, a jar stem, a sleeve, a connection short section, a jar connecting rod, a connection rod, an internal adjusting rod and a lower connector. The upper end of the fishing neck is connected with an external tool string, and the lower end of the fishing neck is connected with the jar rod. The upper end of the jar rod is connected and fixed into the lower end of the fishing neck in a sleeved mode. The fishing neck is sleeved with the sleeve. The jar rod is sleeved with the connection short section, and the outer wall of the upper end of the connection short section is connected with the inner wall of the lower end of the sleeve through threads. The outer wall of the lower end of the connection short section is connected with an installation sleeve. The lower end of the installation sleeve is sequentially connected with a first connection sleeve and a second connection sleeve. The upper end of the jar connecting rod is connected and fixed into the lower end of the jar rod in a sleeved mode. The connection rod is connected to the outer portion of the jar connecting rod in a sleeving mode. The upper end of the internal adjusting rod is connected to the lower end of the connection rod. The upper end of the lower connector is connected and fixed to the outer portion of the lower end of the adjusting rod in a sleeving mode, and the lower end of the lower connector is connected with the external tool string. The externally-adjusting spring jar is convenient to operate and use, high in jarring force, convenient to work and capable of repeatedly working without faults underground, and the force value can be adjusted conveniently.

Description

technical field [0001] The invention relates to a steel wire working tool capable of repeatedly generating upward jarring force, in particular to an externally adjustable spring jar. Background technique [0002] At present, the jars we know include chain jars, tube jars, hydraulic jars, articulated jars and ordinary spring jars, but hydraulic jars are complicated to process and inconvenient to operate. , the price is expensive; the shock force of the tube jar is relatively moderate and difficult to control; the stroke of the joint jar is small, and the shock force generated is small; the shock force of the chain jar is not easy to control; the ordinary spring shock In terms of adjusting the force value, it is necessary to disassemble the connection between the jar and the tool string, and use the force adjustment tool to adjust the force value, which is not convenient, fast, and labor-intensive. [0003] As can be seen above, it is necessary to further improve the prior ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B28/00E21B31/107
CPCE21B28/00E21B31/107
Inventor 李旭东杨万里张晓平
Owner BAOJI JINHUI OILFIELD MACHINERY
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