Control system of coiled tubing underground tractor driven by electronic control hydraulic pressure
A control system, electronically controlled hydraulic technology, applied in wellbore/well components, measurement, earth-moving drilling and production, etc., can solve problems such as difficulty in running and taking out, difficult WOB, large coiled tubing friction, etc., and achieve flexible control. Traction speed, compact supporting part, good flexibility
Active Publication Date: 2013-06-26
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
[0014] In order to overcome the defects of the prior art, the object of the present invention is to provide a control system of an electronically controlled hydraulically driven coiled tubing downhole tractor, which utilizes an electronic control module to control a servo motor so that two five-position five-way reversing valves can precisely control the hydraulic pressure. The circuit, together with the control of other valves, realizes the effective hydraulic drive tractor to pull the coiled tubing string downhole to run in and take it out smoothly, which solves the problems such as the difficulty in running in and out, and the difficulty in applying drilling pressure due to the large friction resistance of the coiled tubing in the downhole. Difficulties in enabling coiled tubing to extend longer downhole
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[0055] Such as figure 1 As shown, the electronically controlled hydraulically driven coiled tubing downhole tractor includes an upper slip support and traction system 1 , a center slide pipe assembly 2 , a control system 3 , and a lower slip support system 4 . The upper slip support and traction system 1 slides on the upper part of the center slide tube assembly 2 and can slide up and down along the center slide tube assembly 2; the control system 3 and the lower slip support system 4 are fixed on the center slide tube assembly 2 lower part. The main function of the upper slip support and traction system 1 is to grasp the well wall to support the tractor, and generate axial friction to provide reaction force for the traction force of the tractor. The main function of the control system 3 is to control the working state of the downhole tractor by receiving ground signals. The main function of the lower slip support system 4 is to grasp the well wall to support the tractor, an...
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The invention belongs to the field of oil and gas development and particularly relates to a control system of a coiled tubing underground tractor driven by electronic control hydraulic pressure. The control system of the coiled tubing underground tractor driven by the electronic control hydraulic pressure comprises a control system shell body, a motor module, a hydraulic pipeline module and an electronic control module. The control system of the coiled tubing underground tractor driven by the electronic control hydraulic pressure is characterized in that the motor module, the hydraulic pipeline module and the electronic control module are arranged in sequence in the control system shell body from top to bottom; the motor module comprises a traction control servo motor and a support control servo motor; and the traction control servo motor and the support control servo motor are controlled through the electronic control module by sending instructions. The control system of the tractor is good in flexibility, is suitable for underground traction control operation of a well with a slim hole, and is capable of guaranteeing normal underground liquid circulation in a traction control process, achieving effective control of traction speed, achieving effective power-off protection and two-way traction control and achieving effective control of the traction speed.
Description
technical field [0001] The invention belongs to the field of oil and gas development, and in particular relates to a control system for an electronically controlled hydraulically driven coiled tubing downhole tractor. Background technique [0002] In the late 1990s, many foreign companies successively developed horizontal well traction devices (that is, cable tractors) that can independently operate underground. After years of development, so far, representative tractor products mainly include: Well Tractor wheeled tractor from Denmark Welltec Company, Sondex wheeled tractor from UK Sondex Co., Ltd., PowerTrac from Norway Maritime Well Service (MWS) company Advance wheeled tractors, PowerTrac INVADER crawler tractors, SmarTract telescopic tractors from British ExproGroup, MaxTRAC telescopic tractors from French Schlumberger, and Microhole Drilling Tractor telescopic tractors from Western Well Tool Company in the United States. Among them, the Microhole Drilling Tractor tele...
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Login to View More IPC IPC(8): E21B23/08E21B47/00E21B49/00
Inventor 侯学军
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY