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An automatic torsion control method for anti-sticking and drag reduction in sliding drilling

A control method and automatic technology, which is applied to the automatic control system of drilling, drilling equipment, earth-moving drilling and mining, etc., to achieve the effect of accurate data, simplified operation process, and reduced impact caused by frictional resistance.

Active Publication Date: 2021-07-27
北京四利通控制技术股份有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide an automatic torsion control method for anti-sticking and drag reduction in drilling sliding drilling, so as to solve the aforementioned problems in the prior art

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  • An automatic torsion control method for anti-sticking and drag reduction in sliding drilling

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0025] An automatic torsion control method for anti-sticking and drag reduction in sliding drilling, such as figure 1 shown, including the following steps:

[0026] S1. During the rotary drilling process, the parameters of suspended weight and vertical pressure are collected as basic data, and the weight-on-bit value is calculated by using the difference between the suspended weight of the drilling tool and the drilling state, or the data of the suspended weight and vertical pressure are combined The method of conversion is carried out to obtain the weight-on-bit value; the collection of the basi...

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Abstract

An automatic torsion control method for sliding drilling anti-sticking and drag reduction. Firstly, data preparation is performed, basic data in the drilling process are collected in real time, and the linear correspondence relationship between drilling pressure and drill bit torque is analyzed and established; secondly, the wellbore trajectory and drilling With combined parameter values, it can be combined with the WOB to calculate the borehole friction coefficient and the torque distribution from the bottom of the well to the wellhead; finally, the dynamic WOB during the sliding drilling process is collected in real time, and combined with the above calculation results, the limit value of the torsional torque is obtained ; After the results are transmitted into the drilling tool system, the system automatically performs real-time control. The present invention can collect WOB in real time and adjust the limit of torsion torque synchronously, and can maximize the effect of drag reduction under the premise of effectively controlling the tool face and improve mechanical efficiency; during the drilling process, the torque can be adjusted synchronously according to the size of WOB Limit, and control to realize the adjustment of the tool face, can reduce the influence caused by friction as much as possible, and increase the drilling speed.

Description

technical field [0001] The invention relates to the field of drilling control, in particular to an automatic torsion control method for anti-sticking and drag reduction in drilling sliding drilling. Background technique [0002] During the sliding drilling of horizontal wells and extended-reach wells, the frictional resistance is large, and it is difficult to effectively apply the drilling pressure to the drill bit, resulting in slow drilling speed and low efficiency. The development of torsion drag reduction technology has brought hope to solve this problem, but at present, the torsion drag reduction technology is still in the experimental stage and is not yet fully mature. The torque limit set during the torsion drag reduction operation is still obtained by experience or calculated in advance. Therefore, there will be a certain error with the actual situation in the underground, which will lead to the inability of the top drive torsion operation to exert the best effect. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B44/00
CPCE21B44/00
Inventor 缑柏弘杭达震李学清张辉峰
Owner 北京四利通控制技术股份有限公司
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