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Large-displacement horizontal well continuous tubing drilling robot

A horizontal well and extended displacement technology, which is applied in drilling equipment, directional drilling, wellbore/well components, etc., can solve problems such as difficulty in running coiled tubing, achieve various operating modes and solve jamming effects

Active Publication Date: 2018-11-23
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can not only be used to pull coiled tubing in the extended-reach horizontal well section of shale gas wells, solving the difficulty of running the coiled tubing, but also can be used for coiled tubing drilling operations. Combined with supporting downhole tools, it can drill wells conveniently and quickly

Method used

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  • Large-displacement horizontal well continuous tubing drilling robot
  • Large-displacement horizontal well continuous tubing drilling robot
  • Large-displacement horizontal well continuous tubing drilling robot

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0035] Such as Figure 1~3 As shown, the extended-displacement horizontal well coiled tubing drilling robot includes a front centralizer 1, a rear centralizer 5, a front kinematic short joint 2, a rear kinematic short joint 3 and a telescopic short joint 4; The moving sub-joint 3 and the telescopic sub-joint 4 are connected sequentially; the front centralizer 1 and the rear centralizer 5 are respectively installed at the front end and the rear end of the front moving sub-joint 2 and the telescopic sub-joint 4;

[0036] The front kinematic joint 2 includes a control barrel A21, a control valve seat A22, a front hydraulic flow channel 23, a front support piston 24, a front support rod A25, a front driven sprocket 26, a front wheel 27, a front chain 28, a front drive Sprocket 2...

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Abstract

The invention relates to a large-displacement horizontal well continuous tubing drilling robot, which comprises a former centralizer, a rear centralizer, a front motion short joint, a back motion short joint and an extension shortening section; the front motion short joint, the back motion short joint and the extension shortening section are connected to each other in turns; the former centralizers and the rear centralizers are respectively installed at the front end and the rear end of the front motion short joint and the extension shortening section. The large-displacement horizontal well drilling robot is provided with a mud flow channel, which can circulate mud in tow continuous tubing and drilling, therefore the resistance of mud is reduced to the maximum extent. The large-displacement horizontal well drilling robot can carry on two-way haulage, which can solve the jam problem of the robot to a great extent. The large-displacement horizontal well continuous tubing drilling robot is not only suitable for hot dry rock development, but also suitable for unconventional oil and gas (natural gas hydrate, coalbed methane, tight oil and gas, shale gas) and conventional oil and gas resources development.

Description

technical field [0001] The invention relates to the field of oil and gas field development, in particular to a long-displacement horizontal well coiled tubing drilling robot. Background technique [0002] Coiled tubing drilling technology has broad application prospects in the exploration and development of unconventional gas reservoirs, tight gas, shale gas and coalbed methane in my country. However, the coiled tubing coiled tubing does not rotate in the wellbore, and the lowering encounters serious resistance, making it difficult to exert pressure on bit. In order to solve this problem, many kinds of downhole robots have been designed in the oil drilling industry. [0003] Downhole tractors are mainly divided into three types according to their traction methods: wheel type, crawler type and creeping type (telescopic type). Among them, the wheel type appeared earlier, the telescopic type followed, and the crawler type was the latest. Downhole tractors can be divided into ...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B21/00
CPCE21B7/046E21B21/00
Inventor 刘清友刘文全朱海燕赵建国曾杰
Owner SOUTHWEST PETROLEUM UNIV
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