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Hydraulic control system used in underground steering drilling tool

A hydraulic control system and directional drilling technology, applied in directional drilling, fluid pressure actuators, servo motors, etc., can solve problems such as long waiting time, achieve the effects of improving work efficiency, avoiding accidents, and reducing waiting time

Active Publication Date: 2012-05-02
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the thrust cylinder needs to be retracted, under the action of the return spring, the hydraulic oil in the thrust cylinder needs to flow back to the oil tank from the tiny opening of the throttle valve, which requires a long waiting time

Method used

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  • Hydraulic control system used in underground steering drilling tool
  • Hydraulic control system used in underground steering drilling tool
  • Hydraulic control system used in underground steering drilling tool

Examples

Experimental program
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Embodiment Construction

[0017] The present invention will be further described below in conjunction with accompanying drawing:

[0018] Depend on Figure 1 to Figure 4 As shown, a hydraulic control system used in downhole steering drilling tools, including a rotary drilling tool 1, the outer casing 3 is supported by a bearing 2 on the outside of the rotary drilling tool 1, and 3 or 4 thrusts are evenly distributed on the outer casing 3 Plate 4, made of figure 2 Shown is the situation of three thrust plates 4, there is a power block 8 in the cavity between the rotary drilling tool 1 and the thrust plate 4, and the adjustment motor 10, the magnetic coupling 9, the oil pump 7, and the capsule oil tank 12 are collectively arranged in the In the power block 8, the adjustment motor 10 is connected to the control circuit 11, and the right end of the power block 8 is connected to the control valve block 6. The control valve block 6 is concentrated with the control valves of the hydraulic control system, an...

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PUM

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Abstract

The invention relates to a hydraulic control system used in an underground steering drilling tool, mainly solving the problems that the pushing force of the hydraulic control system of the existing underground steering drilling tool is hard to adjust and waiting time is long. The hydraulic control system used in the underground steering drilling tool is characterized in that: the hydraulic control system also comprises a control valve block (6), the output end of the control valve block (6) is connected with a pushing cylinder (5), the input end of the control valve block (6) is connected with an oil pump (7), and the inlet of the oil pump (7) is connected with a capsule fuel tank (12). The hydraulic control system used in the underground steering drilling tool has the characteristics that the output pushing force can be conveniently and freely adjusted, the drilling direction is easy to control, and the waiting time is short.

Description

technical field [0001] The invention relates to the technical field of petroleum engineering, in particular to a hydraulic control system used in downhole steering drilling tools in steering drilling. Background technique [0002] In petroleum and geological drilling, steering drilling is often required. Generally, a guide sleeve that can rotate around the drill tool is installed on the downhole drilling tool, and 3 to 4 evenly distributed hydraulic thrust control systems are placed on the guide sleeve. During the drilling process, according to the measured and calculated inclination angle and azimuth angle, the output thrust of each hydraulic thrust control system is adjusted respectively, so that the drilling tool can generate a certain lateral thrust in a certain direction, so as to control the drilling tool In the downhole direction, steerable drilling is realized. [0003] The current hydraulic thrust control systems generally have the following types: 1. A system th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/02F15B13/04E21B7/04
Inventor 喻重山苏义脑盛利民邓乐张磊窦修荣艾维平范锦辉彭浩管康
Owner BC P INC CHINA NAT PETROLEUM CORP
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