Steering bias tool and steering bias method

An offset and tool technology, applied in directional drilling, electromechanical devices, earth-moving drilling, etc., can solve the problem of self-heating of the system, which is difficult to solve, and the control accuracy of wellbore trajectory is poor, so as to achieve simple and reliable monitoring and reduce self-heating problems. , the effect of reducing power requirements

Inactive Publication Date: 2010-04-21
刘宝林 +1
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Problems solved by technology

[0007] In order to solve the problems of poor wellbore trajectory control accuracy and self-heating of the

Method used

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  • Steering bias tool and steering bias method
  • Steering bias tool and steering bias method
  • Steering bias tool and steering bias method

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Embodiment Construction

[0024] The present invention will be further described in conjunction with accompanying drawing:

[0025] Such as Figure 1 to Figure 3 Shown: a guide biasing tool, including a non-rotating jacket 1 and a rotating mandrel 3, the non-rotating jacket 1 and the rotating mandrel 3 are connected through a bearing assembly 20, the upper end seal 2 and the lower end combined seal 21 seal the hydraulic oil in the inner cavity It is completely separated from the drilling fluid in the outer cavity; the non-rotating casing 1 has an outer surface, and an anti-rotation mechanism 22 is installed on the outer surface. The control system measures the offset of the rotating mandrel 3 through the displacement sensor 12, and transmits it through the downhole short-range communication system. To the measurement and control system, the control system 6 presets the design parameters of the wellbore trajectory, compares the measured values ​​of the measurement while drilling with the trajectory desi...

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Abstract

The invention discloses a steering bias tool, which belongs to the technical field of automatic closed-loop steering drilling tools of petroleum, drilling, and exploration and development, and comprises a non-rotation jacket, a rotating mandrel and bias execution mechanisms, wherein the non-rotation jacket is sleeved outside the rotating mandrel, and at least two anti-rotation mechanisms are arranged on the outer surface of the non-rotation jacket; and a directional sleeve is arranged on the rotating mandrel through a needle bearing, the outside of the directional sleeve is circumferentially and evenly distributed with at least three sets of the bias execution mechanisms, each set of bias execution mechanism comprises a rolling bearing, a left sliding block, a reverse-flighted screw, a right sliding block, a left support and a right support, and the positions, which correspond to the left sliding block and the right sliding block, on the directional sleeve are provided with two symmetrical inclined planes. The steering bias tool realizes the bending of the rotating mandrel by using a machine, which is a rigid motion, so the control accuracy is higher; and the motion of a directional bending execution mechanism is static bias, so the power consumption is low, the spontaneous heating problem of the system is effectively solved, and the sealing requirement on the system is reduced and a sealing structure is simplified at the same time.

Description

technical field [0001] The invention belongs to the technical field of automatic closed-loop steering drilling tools for petroleum, drilling, exploration and development. Specifically, the present invention relates to a drilling tool and a biasing method for producing directional bending of a downhole tool to realize high-precision biasing and steering. Background technique [0002] With the development of the petroleum industry, there are more and more demands and difficulties for the development of special craft wells such as deep wells, ultra-deep wells, extended-reach wells and long-distance horizontal wells. The requirements are getting higher and higher, and the research and development of steering tools for high-precision steering drilling is more important and urgent. [0003] The traditional steering method is to use the combination of steering motor and PDC bit, and the sliding drilling and the rotating drilling of the steering motor are carried out alternately, b...

Claims

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Application Information

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IPC IPC(8): E21B44/02E21B7/04H02K7/10
Inventor 刘宝林周琴胡远彪杜建生李国民杨甘生
Owner 刘宝林
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