Continuous jar

A technology of jars and shocks, which is applied in the direction of wellbore/well components, earthwork drilling and mining, etc., and can solve problems such as damage, aggravating fishing difficulty, loosening and falling fish, etc.

Active Publication Date: 2018-11-23
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shock force does not act well on stuck strings
[0004] 2. For sand plugging and gravel sticking in the well completion process, due to the continuous accumulation of sand and gravel, the conventional jar can only produce a single one-way jar after being pulled or pressed, and it takes a long time to reset and reset when it is jarred again. Preparatory work, so it is difficult to achieve the goal of unblocking
[0005] 3. For coil

Method used

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Example Embodiment

[0040] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described The embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

[0041] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or a central element may also exist. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time....

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Abstract

The embodiment of the invention discloses a continuous jar. The continuous jar comprises a shell, a jarring block, a hydraulic driving assembly and an elastic driving assembly, wherein an upper jarring table shoulder and a lower jarring table shoulder which are oppositely arranged are arranged in the shell; the jarring block is arranged in the shell and located between the upper jarring table shoulder and the lower jarring table shoulder, a first axial through hole is formed in the jarring block, and the jarring block can axially move along the shell; the hydraulic driving assembly is locatedat the upper portion of the jarring block, can move opposite to the shell, can plug the first axial through hole, and therefore drives the jarring block to move downwards in the axial direction of theshell; the elastic driving assembly is located at the lower portion of the jarring block, and can drive the jarring block to move upwards in the axial direction of the shell when the hydraulic driving assembly is separated from the jarring block. By means of the continuous jar in the embodiment, it can be avoided that as a conventional jar is repeatedly pulled and pressed, a pipe column is fatigue and ineffective.

Description

technical field [0001] The present application relates to the field of unblocking of oil and gas equipment, in particular to a continuous jar. Background technique [0002] For many different types of stuck drills, the jar has been developed so far, and there have been many successful stuck-free cases. However, for complex well conditions, conventional jars are difficult to achieve the expected results, and have the following shortcomings: [0003] 1. For drilling stuck accidents in horizontal wells and extended-reach wells, conventional jars only generate shocks by lifting and pressing down. The shock force cannot act well on the stuck pipe string. [0004] 2. For sand plugging and gravel sticking in the well completion process, due to the continuous accumulation of gravel, conventional jars can only produce a single one-way jar after being pulled or pressed, and it takes a long time to reset and reset when jarring again. Preparatory work, so it is difficult to achieve t...

Claims

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Application Information

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IPC IPC(8): E21B31/113
CPCE21B31/113
Inventor 高巧娟李显义王娜郑翔李兴杰于兴胜陈睿陈慧慧王方明
Owner BC P INC CHINA NAT PETROLEUM CORP
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