Automatic driller feeding system based on well bottom drill pressure and remote controlling method

Abstract

The invention provides an automatic driller feeding system based on well bottom drill pressure and a remote control method. The system comprises an overhead crane and a large hook located on the lowerportion of the overhead crane. The overhead crane and the large hook are connected through a steel wire rope. A faucet is arranged below the large hook. The faucet and a drill rod are connected through a square drill rod. A winch is connected with a differential mechanism with a motor. The winch is provided with a displacement sensor. The large hook is provided with a large hook load sensor. A dead line sensor is installed on the steel wire rope. The large hook load sensor, the dead line sensor and the displacement sensor transmit signals to a signal amplifier. The signal amplifier transmitsdata to a DTU, and the DTU transmits the data to a far-end server through a 5G mobile network. A computer receives the data from the server, treats the data, and calculates target drill pressure to beinput to the ground according to the given well bottom drill pressure. The computer sends an instruction to an RTU on site through the server, the RTU controls the differential mechanism with the motor to adjust the rotating speed of the winch, and thus the well bottom drill pressure can be controlled remotely and precisely.

Description

technical field [0001] The invention relates to the technical field of a drilling system for oil drilling rigs, in particular to an automatic drilling system and a remote control method based on bottom-hole drilling pressure. Background technique [0002] In the field of oil and gas drilling, the performance of the drill bit is mainly judged by the ROP, and the bottom hole pressure is the main parameter affecting the ROP. Therefore, in order to optimize the drilling speed of the drill bit, reduce the wear of the drill bit, improve the drilling efficiency and reduce the drilling cost, it is necessary to obtain accurate bottom hole weight. [0003] The main disadvantages of the existing constant pressure-on-bit automatic drill feeding system: [0004] 1) At present, the WOB value of the given automatic drill feeding system is obtained based on the driller's experience or tedious trial drilling, and the accuracy is poor. [0005] 2) During the drilling process, especially in ...

AI Technical Summary

Problems solved by technology

[0004] 1) At present, the WOB value of the given automatic drill feeding system is obtained based on the driller's experience or tedious test drilling, and the accuracy is poor

[0005] 2) During the drilling process, especially in the drilling process of horizontal wells, the friction of the horizontal well section is large, and it is not easy to apply the drill bit load, resulting in a large difference between the pressure on the surface and the bottom hole, so it is impossible to obtain accurate bottom hole WOB, let alone an accurate bottom-hole WOB

[0006] 3) Due to the inability to apply accurate bottom-hole drilling pressure, the actual bottom-hole drilling pressure deviates from the ideal value

Small WOB will restrict the performance of the drill bit, and even lower rock-breaking efficiency; excessive bottom-hole WOB will lead to increased wear and shortened life of the drill bit

Therefore, too large or too small WOB is very unfavorable to drilling operations.

[0007] 4) Drilling data becomes complicated with the increasing complexity of drilling and production technology and well conditions. Currently, operators in the driller's room can only deal with simple drilling problems on site, and it is difficult to deal with the increasing mass of drilling data, and it is even more difficult to judge complex downhole conditions. Therefore, better measures cannot be taken to speed up the drilling efficiency and increase the drilling cost

In addition, the working environment at the drilling site is becoming increasingly harsh, and workers cannot stay behind for a long time, so stable remote control equipment and methods are urgently needed

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