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Expansion tube expansion process method and tool system

An expansion tube and tool technology, which is applied in the field of expansion tube expansion process and tool system, can solve problems such as inability to make threaded connections, failure to obtain the maximum diameter, and difficulty in realizing pressure chambers, so as to improve safety reliability and drilling speed, Dealing with drilling risks and accidents, reducing the effect of raw material usage

Active Publication Date: 2016-09-07
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following disadvantages: when the wall thickness of the expansion tube is too thin (less than 7mm), it is impossible to do threaded connection, and the pressure chamber is difficult to realize
Limited by the size of the compression chamber, the maximum diameter cannot be obtained

Method used

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  • Expansion tube expansion process method and tool system
  • Expansion tube expansion process method and tool system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, an expansion tool system, the outer surface of the expansion tube vulcanizes rubber sleeves and steps at a certain distance. The rubber sleeve can make the expansion tube better adaptable to the open hole wall and enhance the fit of the expansion tube to the open hole wall. The steps enhance the fit and suspension of the expansion tube.

[0031] The expansion joint in the expansion tube assembly is located at the bottom end of the expansion tube, and is connected to the expansion tube through a common threaded port, and the other end is connected to the connection compression sleeve with a negative-angle partial ladder left-hand thread buckle, and the expansion cone can be released after expansion.

[0032] The center rod assembly is made up of three identical center rods, stoppers and springs. There are three groups of stoppers on each center rod, and each group distributes four sto...

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PUM

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Abstract

The invention discloses an expansion pipe expansion process method and a tool system, which belong to the technical field of well drilling and completion in the petroleum and natural gas industry. Including lifting sub, central rod assembly, connecting rod assembly, expansion pipe assembly, connecting sub, expansion cone assembly, combined hydraulic cylinder, hydraulic anchor, plug; the upper part of the lifting sub is threaded and connected with the drill pipe , can lower the new type of expansion tool string to the predetermined position; the lower end of the lifting nipple is connected with the central rod assembly, which is composed of three identical central rods connected by threads, and each central rod has a set of telescopic The stopper is preset in the expansion tube after compression. When the center rod is lifted up, the stopper will pop up automatically when it is exposed to the expansion tube. When the center rod moves to the stopper, it will be fixed at the end of the expansion tube; the stopper is realized by a spring mechanism Telescopic, a total of 4 groups, evenly distributed on the circumference of the central rod. The invention reduces drilling and completion costs and has very wide application prospects.

Description

technical field [0001] The invention relates to an expansion pipe expansion process method and a tool system, which belong to the technical field of well drilling and completion in the petroleum and natural gas industry. Background technique [0002] Expandable Tubular Technology (Expandable Tubular Technology) is a new technology produced and developed in the 1990s. It can be applied to drilling, well completion, oil production, workover and other operations, and is known as a revolutionary development. new technology. The so-called expansion tube refers to a metal round tube made of special materials. Its original state has good ductility. Under the action of expansion force, through the extrusion of the expansion cone, its inner diameter and outer diameter are expanded and formed Permanent plastic deformation, expansion rate can reach 15-60%. The expansion tube technology changes the crystal structure and mechanical properties of the expansion tube material through the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B29/10E21B33/127
Inventor 郭慧娟尹洪伟王宏伟徐丙贵王建利任荣权吕明杰马汝涛王雪田毅刘洋张士彬卢静
Owner BC P INC CHINA NAT PETROLEUM CORP
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