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Easily-deflecting mixed type rotary steering drilling system

一种旋转导向钻井、混合式的技术，应用在钻井的自动控制系统、定向钻井、钻井设备等方向，能够解决井眼轨迹不易控制等问题，达到大工程意义和实用价值、磨损减小、降低的需求的效果

Pending Publication Date: 2022-04-12
万晓跃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, other forms of dynamic offset rotary steerable also have the problem that the wellbore trajectory is not easy to control

Method used

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  • Easily-deflecting mixed type rotary steering drilling system
  • Easily-deflecting mixed type rotary steering drilling system
  • Easily-deflecting mixed type rotary steering drilling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A hybrid rotary steerable drilling system that is easy to build deflection, firstly take the dynamic offset rotary steerable as an example, as shown in figure 1 As shown, it includes a front bearing body 1, a weight-on-bit torque deflection transmission joint 2 and a deflection control system 3. The weight-on-bit torque deflection transmission joint 2 includes a universal joint 21 and the input shaft and output shaft of the universal joint 21 The elastic stabilizing device 22 whose axis is on the same straight line, the front end of the front bearing body 1 is fixedly connected with the drill bit 11 , and the drill bit 11 can be integrally formed with the front bearing body 1 . The rear end of the front bearing body 1 is fixedly connected to the output end 211 of the universal joint 21 , of course, the front bearing body 1 can also be integrally formed with the output shaft 211 of the universal joint 21 . The input shaft 212 of the universal joint 21 can be directly fix...

Embodiment 2

[0066] The difference from the above-mentioned embodiment is that, if Figure 1-4 As shown, the easy-to-build hybrid rotary steerable drilling system of the present invention also includes a centralizer 5 arranged behind the front pushing assembly 1 , and the centralizer 5 is used to increase the stability of build-up.

[0067] The centralizer 5 is preferably arranged between the center point of the front thrust assembly 1 and the universal joint 21 , and the deflection control system 3 controls the radial thrust of the front thrust assembly 4 The member 41 pushes against the well wall along the radial direction of the front bearing body 1, so that the front bearing body 1 is centered on the center point of the universal joint 21 and the contact between the centralizer 5 and the well wall The point is the fulcrum, and the deflection angle is generated relative to the input shaft 212 of the universal joint 21. At this time, the contact point from the drill bit to the centralize...

Embodiment 3

[0075] Different from the above-mentioned embodiments, the deflection control system 3 includes an electric actuator 31 for controlling the radial pushing member 41 to generate a deflection force against the well wall of the front bearing body 1 , for Attitude measurement equipment 32 and downhole computing equipment 33 for measuring the gimbal deflection angle;

[0076] The downhole computing device 33 includes a computing chip electrically connected to the attitude measuring device 32, the electrical execution device 31 and the power supply device 6, and the computing chip receives the deflection angle information and target deflection information collected by the attitude measuring device 32. Comparing the angle information to calculate the steering direction and steering force, and then controlling the electric actuator 31 to make the front pushing assembly 4 produce a thrust resultant force opposite to the steering direction on the well wall, and the weight-on-bit torque i...

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Abstract

An easily-deflecting mixed type rotary steering drilling system comprises a front bearing body, a bit pressure torque deflection transmission short section and a deflection control system, and further comprises a plurality of universal bit pressure torque transmission short sections which are arranged behind the bit pressure torque deflection transmission short section and connected in series. Each of the bit pressure torque deflection transmission short section and the universal bit pressure torque transmission short section comprises a universal joint, the front end of the front bearing body is fixedly connected with a drill bit, the rear end of the front bearing body is fixedly connected with the output end of the universal joint, and a front pushing assembly is arranged on the circumferential surface of the front bearing body; the deflection control system controls the radial pushing piece of the front pushing assembly to push the well wall in the radial direction of the front bearing body, so that the front bearing body generates a deflection angle relative to an input shaft of the universal joint with the center point position of the universal joint as the center to control the well drilling direction, and then the build-up rate is increased. Due to the fact that the deflection angle is generated only by overcoming small deflection force of the universal joint, directional drilling can be achieved through a high-curvature well hole.

Description

technical field [0001] The invention relates to the technical field of oil exploitation and drilling, in particular to a hybrid rotary steerable drilling system that is easy to build deflection. Background technique [0002] Rotary steerable drilling technology is currently the most representative and advanced drilling technology in the world. According to the working mode of the downhole tool system, the rotary steerable system (RSS, Rotary Steerable Systems) is divided into the following four types: static offset push-on, Dynamic offset push-to, static offset directional and dynamic offset directional. Wherein, the push-by type and the pointing type are two types of existing steering drilling systems according to the difference of the drill bit steering principle. The push-to-bit type uses an offset mechanism (the piston pushes against the well wall) to bias the drill bit near the drill bit and directly provide lateral force to the drill bit. The pointing bit type is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/06E21B44/00E21B47/022E21B47/0228E21B47/024
CPCE21B47/022E21B7/062E21B44/00E21B47/024E21B47/0228E21B41/0035E21B7/064E21B7/061
Inventor 徐梓辰万晓跃
Owner 万晓跃
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