Static directional hydraulic rotary steering tool

A hydraulic rotary, pointing technology, applied in directional drilling, drilling equipment, drilling equipment and methods, etc., can solve the problems of low efficiency, low deflection ability and high cost

Inactive Publication Date: 2019-11-05
SOUTHWEST PETROLEUM UNIV
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  • Claims
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Problems solved by technology

[0003] In order to solve the problems of low deflection capability, high cost, low efficiency, and inaccurate control of deflection of traditional rotary steerable tools described in the background technology, and improve the drilling efficiency of horizontal wells and the control accuracy of borehole trajectory, the present invention provides a A Static Pointing Hydraulic Rotary Steering Tool

Method used

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Embodiment Construction

[0011] Below in conjunction with figure, the present invention will be further described:

[0012] According to the accompanying drawings, the rotary steerable tool consists of three parts as a whole, that is, a turbine motor assembly, a guide mechanism, and a torque transmission mechanism. Wherein the turbine motor assembly consists of an anti-drop cap 2, an anti-drop clip 3, a fixed plate 4, a limit sleeve 5, an anti-drop ring 6, a turbine shaft 7, a turbine stator 9, a turbine rotor 10, a limit sleeve 11 and Composition of the turbine body. The guide mechanism consists of a non-rotating outer cover 17, a battery pack 18, a control and detection group 19, a servo motor 20, a plum blossom coupling 21, a screw mandrel 22, an auxiliary piston 23, a guide body 24, a main piston 25, a spring 26 and a rectangular sealing ring 27 compositions. Torque transmission mechanism is made up of mandrel 28, long pin 31, steel ball 32 and ball sleeve 33 again. The anti-falling cap and the...

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Abstract

The invention relates to a static directional hydraulic rotary steering tool which is formed by three parts: a turbine motor assembly, a guide mechanism and a torque transmission mechanism. The staticdirectional hydraulic rotary steering tool has the technical scheme that six high-temperature-resistant pressure-resistant pistons are uniformly distributed on the circumference; during control, thethree connected pistons push oil liquid, and the three opposite pistons pull the oil liquid, so that a spindle is deviated toward one direction under the actions of the pistons, and a lower drill bitcan accurately guide under the control so as to drill toward a target position; nine rows of pistons are arranged in the radial direction, and 54 pistons are arranged in total, so that a sufficient force is provided for deviating the spindle; when the pistons reach to the limiting position, a horizontal included angle formed between a deflection point and a deflection center is 1.16 degrees; in order to ensure the stable operation of the pistons, six direct-current servo motors are uniformly distributed on the upper parts of the pistons at 60-degree angles, and a plum coupling device is connected under each servo motor; and a screw rod is connected under each coupling device, so that the rotation movement produced by the servo motors is changed into the radial movement through the screw rods.

Description

technical field [0001] The invention relates to a static pointing hydraulic rotary steering tool. The tool is composed of three major parts: a turbine motor assembly, a guiding mechanism and a torque transmission mechanism. Background technique [0002] The development of oil and gas fields has experienced the development from vertical wells to cluster wells and horizontal wells. The reason is that as the degree of development deepens, the difficulty of development becomes greater and greater. Compared with other new drilling technologies, the economic benefits of vertical well development are poor. Since the oil and gas fields adopt the cluster horizontal well development mode, the economics of exploration and development have been greatly improved, and the impact on the environment has been reduced at the same time. Improving the drilling efficiency of horizontal wells and the control accuracy of wellbore trajectory is the basis for ensuring the efficient development of ...

Claims

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Application Information

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IPC IPC(8): E21B7/06
CPCE21B7/06E21B7/061
Inventor 田家林王彦之周思奇杨琳
Owner SOUTHWEST PETROLEUM UNIV
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