A Downhole Adjustable Steering Drilling Tool
A technology of directional drilling and tools, applied in the field of geological drilling, can solve the problem that the bending angle of the drill tool assembly cannot be adjusted dynamically, and achieve the effect of simple structure, simple and reliable control
Active Publication Date: 2019-11-12
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the bending angle of the drilling tool assembly cannot be dynamically adjusted during the drilling process, and to provide a downhole adjustable steering drilling tool
Method used
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Embodiment Construction
[0021] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.
[0022] Such as figure 1 with figure 2 As shown, a downhole adjustable steering drilling tool includes an upper joint 1, an inner cylinder 2, a throttle pipe 4, a flexible pipe 5, a piston rod 7, a positioning ball seat 8, a locking cylinder 10 and a lower joint 11. The upper end of the upper joint 1 of the tool is connected with the upper drill string by a threaded thread, the middle part of the inner cavity of the upper joint 1 is connected with the upper part of the outer circle of the inner cylinder 2 with a threaded thread, and the lower part of the inner cavity of the upper joint 1 is connected with the outer circle of the positioning ball seat 8 with a threaded thread. The lower end of the tube 2 is connected with the upper end of the outer circle of the flexible tube...
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The invention discloses a downhole adjustable guiding drilling tool. The middle of an inner cavity of an upper connector of the drilling tool is connected with the upper portion of the outer circle ofan inner cylinder; the lower portion of the inner cavity of the upper connector is connected with the outer circle of a positioning ball seat; the lower portion of the inner cylinder is connected with the upper portion of the outer circle of a flexible pipe; the lower portion of the outer circle of the flexible pipe is connected with a locking cylinder; an adjusting cylinder is arranged between the positioning ball seat and the locking cylinder; a throttle pipe is arranged inside the middle of the inner cylinder and can slide relative to the inner cylinder and the inner wall of the flexible pipe under the pressure action; the circumference of the inner cylinder and the circumference of the flexible pipe are each provided with at least one through hole; an inner cavity of the positioning ball seat is formed into a step hole; an eccentric step hole is formed in the axial direction of the positioning ball seat and internally provided with a piston rod; and the lower portion of the pistonrod abuts against the adjusting cylinder, and the flexible pipe sequentially passes through the step hole of the positioning ball seat, an inner hole of the adjusting cylinder and an inner hole of the locking cylinder and then is connected with a lower connector. The downhole adjustable guiding drilling tool conducts driving through the throttle pressure difference of drilling liquid, control iseasy and reliable, and the bending angles of an upper drilling column and a lower drilling column can be adjusted.
Description
technical field [0001] The invention relates to the field of geological drilling, in particular to a downhole adjustable steering drilling tool. Background technique [0002] In the oil and gas industry, drilling operations are extremely technically difficult and are one of the most important links in the development of oil and gas reservoirs. With the development of drilling technology, cost reduction and efficiency increase have become an important development direction. Advances in technologies such as horizontal wells, extended-reach wells, and branch wells have greatly reduced the development cost of oil and gas reservoirs and increased output, which has very significant economic benefits and has also increased technical difficulty. During the development of horizontal wells, extended-reach wells and branch wells, deflection building is a very critical technical point. At present, the commonly used deflection process is to put the drill string composed of drill bit, d...
Claims
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IPC IPC(8): E21B7/06
CPCE21B7/067
Inventor 王梓蔚张烈辉刘香禺朱伟林
Owner SOUTHWEST PETROLEUM UNIV