Up-hole controllable guide tool

A steering and tool technology, applied in drilling equipment, directional drilling, drilling equipment and methods, etc., can solve the problems of increasing drilling cost and drilling cycle, and achieve the effect of saving drilling cost

Inactive Publication Date: 2009-07-01
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the existing technologies that change the drilling direction of the bottom hole bit by deflection need to go through the "interrupted" drilling process of "pulling out the drill, replacing the bent joint with a fixed angle on the ground, and then running in the drill", which increases the drilling cycle. , the cost of drilling increases, so this problem needs to be solved urgently

Method used

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] The uphole controllable steering tool proposed by the present invention is as figure 1 , Figure 1A , figure 2 As shown, there is an outer shell formed by the upper joint 1 and the middle joint 17 of the hollow cylindrical body, which are fitted and fixedly connected. The upper joint 1 and the middle joint 17 are coaxially arranged and fixedly connected by connecting pins 111; The shaft 4, a valve stem fixing sleeve 23, and a gourd head guide rod 24 are all hollow cylindrical bodies, and are sequentially fit and connected in the above-mentioned housing; the hollow mandrel 4 is the same as the upper joint 1 and the middle joint 17. shaft setting; a control device that can control its up and down movement is provided between the outer wall of the hollow mandrel 4 and the upper joint 17; The included angle of the center line o...

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Abstract

A controllable guide tool on the well, which has a shell composed of an upper joint, a middle joint and a lower joint, and a hollow mandrel, a valve stem fixing sleeve, and a gourd head guide rod are sequentially arranged inside, and the outer side of the hollow mandrel is A control device that can control its up and down movement is provided between the wall and the upper middle joint. A control valve is arranged between the valve stem fixing sleeve and the bottom end of the upper joint, and the lower part of the gourd head guide rod is fixed to the lower joint. connect. The present invention can control the structural bend size of the downhole BHA on the uphole through the change of the mud displacement or the drilling weight, and the application of the uphole controllable steering tool provided by the present invention overcomes the defects of the known technology and can meet the requirements of drilling orientation The need for control and angle adjustment technology while drilling, and the time spent on this realization is very small, thereby reducing the time wasted due to tripping, tripping in and replacing bent joints, and saving drilling costs.

Description

technical field [0001] The invention relates to a drilling tool, in particular to an uphole controllable steering tool capable of controlling the drilling direction of a drill bit of a bottom hole drilling tool assembly on the ground. Background technique [0002] Drilling is an important means of oil and gas exploration and development, the basic project of oil and gas field construction, and the most expensive professional project in the oil and gas industry, and its cost is as high as 40% of the entire investment. Advanced drilling technology plays an important role in accelerating oil and gas exploration and development, increasing reserves and recovery, reducing exploration and development investment and operating costs, prolonging the life of old oil fields, and reducing the number of drilling platforms to obtain higher economic benefits. [0003] Therefore, it is of great strategic and practical significance to carry out research on drilling technology and tools, and ...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B3/02
Inventor柳贡慧黄福友
OwnerCHINA UNIV OF PETROLEUM (BEIJING)