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Drill rod joint positioning and controlling method of continuous cycle drilling system

A drill pipe joint and positioning control technology, applied in drill pipe, drilling equipment, drill pipe, etc., to improve safety and reliability, reduce hidden troubles, and avoid rubber wear

Active Publication Date: 2011-01-12
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a drill pipe joint positioning control method for a continuous circulation drilling system, to solve the control problem of the continuous circulation drilling system realizing accurate positioning of the drill pipe joint in the cavity assembly of the main engine

Method used

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  • Drill rod joint positioning and controlling method of continuous cycle drilling system
  • Drill rod joint positioning and controlling method of continuous cycle drilling system
  • Drill rod joint positioning and controlling method of continuous cycle drilling system

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Embodiment 1

[0027] Embodiment 1: Taking a drill pipe joint positioning control method of a continuous circulation drilling system as an example, the present invention will be further described in detail.

[0028] refer to figure 1 with figure 2 . The equipment adopted is: a host 1 is fixed on the base 21, and the host 1 is opposite to the wellhead. The main engine 1 is composed of a drill pipe power tong 13, a balance compensation device 17, a cavity assembly 18, a support assembly 19, and drilling power slips 20; the balance compensation device 17 is composed of four balance compensation oil cylinders 25, and the balance compensation The oil cylinder 25 is fixed on the upper connecting plate 15 of the bracket assembly 19; the drill pipe power tongs 13 are fixedly connected with the piston rod of the balance compensation cylinder 25; the cavity assembly 18 is fixed on the bracket assembly 19, and the upper half-sealed gate 26. The full-sealed ram 27, the back clamp 28 and the lower ha...

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PUM

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Abstract

A drill rod joint positioning and controlling method of a continuous circulation drilling system is used in the technical field of petroleum drilling. The method comprises the step of positioning drill rod joints when the drill rod joints are unscrewed or screwed in the drilling connection-making process, wherein a laser distance meter detects the mark I, mark III or mark II of the lower drill rod of a top drive unit to distinguish the position of the drill rod joints; a lifting top drive unit is used to raise or drop the drill rod; and a back-up wrench is used to screw or unscrew the drill rod joints. The effects of the invention are as follows: the drill rod joints can be accurately positioned in the host machine sealing cavity of the continuous cycle drilling system, thus ensuring that the back-up wrench in the cavity can successfully clamp the drill rod joints; and the relative position for butting the drill rod joints can be correctly judged, thus increasing the safety and reliability of the screwing or unscrewing operation and reducing hidden troubles.

Description

technical field [0001] The invention relates to the field of drilling equipment in the petroleum industry, in particular to a control method for realizing accurate positioning of drill pipe joints when a continuous circulation drilling system is connected to a single root. Background technique [0002] At present, the continuous circulation drilling system can maintain the continuous circulation of the mud during the single root connection, so as to achieve a stable equivalent circulation density and uninterrupted discharge of cuttings during the entire drilling period, avoiding the bottom hole caused by pump stop and pump circulation. Pressure fluctuations, comprehensively improve wellbore conditions and drilling safety, and effectively reduce drilling accidents. [0003] When connecting a single piece, the continuous circulation drilling system must complete the make-up and break-out operation of the drill pipe joint in the cavity assembly of the main engine, and the opera...

Claims

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Application Information

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IPC IPC(8): E21B19/16
Inventor 马青芳胡志坚王爱国肖建秋
Owner BC P INC CHINA NAT PETROLEUM CORP
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