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Protection method for rotary drilling rig, controller, protection device and rotary drilling rig

A technology of rotary drilling rig and protection device, applied in the direction of rotary drilling rig, drilling equipment and method, rotary drilling, etc.

Active Publication Date: 2013-03-27
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art lacks effective protection measures and devices for the above-mentioned faults that may occur in drill pipes

Method used

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  • Protection method for rotary drilling rig, controller, protection device and rotary drilling rig
  • Protection method for rotary drilling rig, controller, protection device and rotary drilling rig
  • Protection method for rotary drilling rig, controller, protection device and rotary drilling rig

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Embodiment Construction

[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0034] The present invention provides a protection method for a rotary drilling rig, the rotary drilling rig includes a drill rod 5 and a main pump 1 for driving the drill rod 5 to rotate, wherein the protection method includes:

[0035] Detecting the value of the depth of the drill pipe 5 and the value of the first output pressure of the main pump 1;

[0036] Determine a first upper limit value according to the value of the depth, compare the value of the first output pressure with the first upper limit value, and when the value of the first output pressure is greater than the first upper limit value , reduce the first output pressure of the main pump 1 .

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Abstract

The invention discloses a protection method for a rotary drilling rig. The rotary drilling rig comprises a drilling stem (5) and a main pump (1) used for driving the drilling stem (5) to rotate. The protection method comprises: detecting the depth of the drilling stem (5) and the first output pressure of the main pump (1); and determining the first upper limit according to the value of depth, comparing the value of the first output pressure and the first upper limit, and when the value of the first output pressure is larger than the first upper limit, reducing the first output pressure of the main pump (1). The invention also provides a controller for realization of the protection method, a protection system and the rotary drilling rig. By adopting the technical scheme, detection and feedback of the pressure output by the main pump are achieved, and when the actual torque born by the drilling stem is larger than the maximum torque the drilling stem can bear, the output of the main pump can be reduced, the actual torque can be lowered, and the deformation of the drilling stem can be avoided.

Description

technical field [0001] The present invention relates to a protection method for a rotary drilling rig, a controller, a protection device and a rotary drilling rig, in particular to a protection method, a controller, a protection device and a rotary drilling rig for protecting a drill rod of a rotary drilling rig. Dig rig. Background technique [0002] Most of the power of the rotary drilling rig is provided by the main pump, which outputs pressure to the pressurized cylinder, and controls the drill pipe through the pressurized cylinder, which generates pressure on the drill pipe. [0003] During the construction of the rotary drilling rig, it is necessary to adjust the direction of the drill bit and the drilling direction first. As the drilling depth increases, the drill pipe gradually becomes longer. On the one hand, the withstand pressure gradually decreases. When the resistance is high, it is necessary to pressurize the drill pipe instantaneously through the pressurized ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/10E21B3/02
Inventor 李昱费胜巍吴耀华张刊苏超
Owner ZOOMLION HEAVY IND CO LTD