jar

A jar and jarring technology, which is applied in the direction of wellbore/well components, earthwork drilling, etc., can solve the problems of different jarring forces, the inability to adjust the jarring force, and affect the use effect, etc., and achieve a simple structure. Effect

Active Publication Date: 2019-11-08
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different causes of drill sticking in drilling operations, the jarring force required to release the jamming is also different. Although the mechanical jar can provide a constant jarring force, its jarring force cannot be determined according to the actual situation. adjustment, so it affects its use effect

Method used

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] Figure 1A to Figure 6 An embodiment of a jar provided by the present invention includes: a main body 11 with a channel 19 passing through it; a rod 21 movably arranged in the channel 19; The rod body 21 is provided with a shock part 23, which can shock between the body 11 and the body 11; the side wall of the rod body 21 is provided with a first matching part 37; a locking member 39, which Sleeved on the outside of the rod body 21; the locking member 39 ca...

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Abstract

The invention provides a bumper sub. The bumper sub comprises a body, a rod, a locking part and an adjusting part. A channel is formed in the body in a penetrating mode, the rod is movably arranged in the channel, a jarring part is arranged on the rod, and jarring can be generated between the jarring part and the body. A first matching part is arranged on the side wall of the rod, the locking part is arranged outside the rod in a sleeving mode and can be matched with the first matching part so as to apply locking force to the rod, and thus moving of the rod is inhibited. The adjusting part is arranged outside the rod in a sleeving mode and can move in the extending direction of the rod, and the locking force of the locking part to the rod can be adjusted when the adjusting part moves. The bumper sub achieves the purpose that the jarring force can be adjusted.

Description

technical field [0001] The invention relates to the field of tubing drilling and workover operations, in particular to a jar. Background technique [0002] In drilling operations, due to complex geological structures, improper technical measures, and various reasons such as mud, pipe strings, and boreholes, accidents of pipe sticking often occur. Drill sticking has a great impact on the drilling work, and the harm is also very serious. If it is not handled properly, it will not only consume a long time, lose drilling footage, but also may make the accident worse, and even cause the oil and gas well to be scrapped. The jar is one of the effective tools to relieve pipe sticking and prevent larger accidents. When designing complex well drilling or predicting that pipe sticking may occur in a certain well section, the best way is to use vibration while drilling in the drilling tool assembly in advance. When the drilling tool is stuck, use the while-drilling jar to give a strong...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B31/107
CPCE21B31/107
Inventor 黄衍福李兴杰高巧娟周家齐刘希茂张若熙孙一迪米凯夫
Owner BC P INC CHINA NAT PETROLEUM CORP
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