Directional sliding drilling monitoring while drilling control device and control method of directional sliding drilling monitoring while drilling control device

Abstract

The invention discloses a directional sliding drilling monitoring while drilling control device and a control method of the directional sliding drilling monitoring while drilling control device. The directional sliding drilling monitoring while drilling control device comprises data collecting sensors, a programmable controller, a drill rod left and right rotation controller and a monitor, wherein the the sensors include a drill rod torque sensor, a drill rod rotating angle deflection sensor, a vertical pipe pressure sensor, a large hook hanging load sensor and a motor tool surface angle sensor, the programmable controller carries out calculation and analysis on data collected by the sensors, combines a direction drilling experience model with a logic reasoning method for obtaining control parameters and controls a top drive main shaft to rotate and act. The control method comprises the steps of rotating drilling, sliding drilling, tool surface orienting, supporting pressing sliding prevention drilling and sliding drilling tool surface deviation correcting. The control device and the control method provided by the invention have the beneficial effects that the fast and accurate tool surface orienting, correcting and controlling in the directional sliding drilling process are realized; the incapability of drilling pressure or drilling supporting pressure exertion onto a directional sliding drilling drill bit due to well hole friction resistance increase is reduced; the drilling speed and the well drilling efficiency of sliding drilling machinery are respectively and obviously accelerated and improved.

Description

technical field [0001] The invention relates to the field of oil drilling, in particular to a monitoring and control system for directional sliding drilling while drilling. Background technique [0002] There are many methods for directional drilling. Initially, a skewer is used to deflect the wellbore. A tool that can change the direction of the drill bit is lowered to a predetermined depth. When the bit passes through, the drilling direction can be changed to achieve the purpose of directional drilling. This method controls The efficiency is low, and it is easy to miss the target circle. [0003] The second method is to use the mud motor to realize the directional drilling of the wellbore, which is the directional method mainly used at present. This method has been greatly improved compared with the skewing method of the skewer, and the directional control has been improved to a certain extent. However, this method mainly uses manual control of the drilling rig orientatio...

AI Technical Summary

Problems solved by technology

Sliding drilling generally accounts for about 30% of the entire drilling time. Practice has proved that the manual control of the drilling rig to adjust and control the tool face is inefficient and takes a lot of time, which greatly affects the drilling speed.

Another factor affecting the speed of directional drilling is the drilling support pressure. Since the drilling tools above the mud motor cannot rotate during directional sliding drilling, when the wellbore has a certain well deviation and displacement, the bottom hole assembly and some drilling tools Lying on the lower side of the wellbore under the action of gravity, coupled with the limitation of the displacement of the mud pump, the wellbore cleaning is not good. If the pressure cannot be applied to the drill bit, there will be drilling back pressure, which will have a great impact on the ROP and drilling efficiency of directional drilling.

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