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Ground control method of directional drilling adopting mud motor

A directional drilling and mud motor technology, which is applied in the automatic control system of drilling, drilling equipment, earthwork drilling and other directions, can solve problems such as reduction, and achieve obvious effects, improve service life, and improve correction ability.

Inactive Publication Date: 2016-02-17
CNPC BOHAI DRILLING ENG
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a ground control method for directional drilling using mud motors in order to solve the existing problems of manual sliding drilling in directional wells, using the principle of torque control, sensor technology and computer control technology. Or the method of turning the drill pipe left and right to achieve the purpose of reducing the friction of the sliding drilling wellbore, effectively transmitting the drilling pressure, maintaining and controlling the motor tool face, and improving the mechanical penetration rate and drilling efficiency of the sliding drilling

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  • Ground control method of directional drilling adopting mud motor
  • Ground control method of directional drilling adopting mud motor
  • Ground control method of directional drilling adopting mud motor

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0039] like figure 1 As shown, the system for drilling directional wells with the land top drive drilling rig of the present invention is basically the same as the prior art. Among them, 1 drilling rig; 2 derrick; 3 crown block; 4 travel block; 5 hook; 6 top drive; 7 top drive instrument joint; 8 drill pipe torque sensor; 9: drill pipe direction or angular displacement sensor; 10 winch drum wire rope ;11 drawworks; 12 drill floor; 13 mud hose; 14 pump pressure or standpipe pressure sensor; 15 mud pump; 16 drill string; 17 wellbore; 18 bottom hole assembly; ; 20 mud motor; 21 drill bit.

[0040] like figure 2 As shown, the measurement while drilling MWD tool face angle sensor 19, the top drive drill pipe torque sensor 8, the pump pressure or standpipe pressure sensor 14 and the top drive spindle drill pipe direction or angular displacement se...

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Abstract

The invention discloses a ground control method of directional drilling adopting a mud motor. The ground control method includes: using signals collected by four sensors which are underground and overground as input and control variables, wherein the sensors include a measurement while drilling (MWD) tool face angle sensor, a top drive drilling rod torque sensor, a pump pressure or standpipe pressure sensor and a top drive spindle drilling rod direction or angle displacement sensor; through feedback information displayed overground, adopting a computer system and a user intervention mode to monitor directional drilling process overground in real time; executing a drilling rod rotating program, and controlling a drilling rod rotating controller to control a top drive spindle motor to act. A ground assisting system controlling directional drilling by a computer has obvious effect, the ground control method is an optimal choice adopting the mud motor for directional drilling currently, except for a rotating guide system, and drilling efficiency of slide drilling can be improved remarkably by using the ground control method.

Description

technical field [0001] The invention relates to the field of petroleum drilling, in particular, it is suitable for directional drilling operations using a mud motor plus a measurement-while-drilling MWD system bottom hole assembly, and is a drill bit continuously maintained in the process of interchangeability between rotary drilling and sliding drilling. A surface control method for directional drilling using mud motors at the bottom of the well. Background technique [0002] Directional wells and horizontal wells have been widely used in drilling operations. Most domestic vertical wells, directional wells and horizontal wells are drilled with mud motors and measurement-while-drilling MWD systems. When directional drilling is sliding drilling, because the drill string above the mud motor does not rotate, the rotation of the drill bit comes from the mud power motor. When drilling in a curved section or a horizontal section, because part of the drill string lies on the lower ...

Claims

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Application Information

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IPC IPC(8): E21B44/00
Inventor 李智鹏许京国陶瑞东霍如军张建荣杨静王建俊赵静华
Owner CNPC BOHAI DRILLING ENG
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