Runner switching and controlling system

Abstract

The invention discloses a runner switching and controlling system. The system comprises a slurry filter, a communication tube, a control valve, an upright and a central control system, wherein the central control system controls the action of the control valve, and the slurry filter is communicated with the upright through the communication tube and the control valve. According to the system, by switching and controlling a slurry runner, continuous cycle operation for the slurry at a borehole is realized, thus the stability of the borehole pressure is continuously kept, the annulus ECD (equivalent circulating density) value of the borehole is effectively controlled, the stability of the well wall and the good cleaning effect of the borehole are kept, the collapse and the formation of a cuttings bed at a slope section are prevented, and various complex situations of collapsing, blocking, leaking, spraying and the like are avoided. The runner switching and controlling system is simple in structure and has a small size, larger operation platform position can not be occupied, normal operating environment is kept, particularly, the controlling system can be concentrated in a system container after being disassembled, the assemble and the disassemble are very convenient, and the system is very important for the simple and easy operation of a sea drilling platform.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a flow channel conversion control system. Background technique [0002] Drilling occupies an extremely important position in the petroleum industry. From oil and gas exploration in the exploration stage to development and production of gasoline, to the implementation of oil and gas field production increase measures, all must be achieved through drilling. [0003] The continuous circulation drilling system was first developed in the United States. At present, this technology has been applied in oilfield exploration and development, and achieved good results. However, the structural assembly of this set of CCS device is bulky, standing on the turntable is about 2 meters high, the position of the joint cannot be seen in the device, the operation of making up and breaking out is very cumbersome, the control system is huge and complicated, and the price is expensive , lim...

AI Technical Summary

Problems solved by technology

However, the structural assembly of this set of CCS device is bulky, standing on the turntable is about 2 meters high, the position of the joint cannot be seen in the device, the operation of making up and breaking out is very cumbersome, the control system is huge and complicated, and the price is expensive , which limits his widespread use

[0004] At present, the domestic drilling technology needs to be further improved. Many wells require the wellbore to maintain a continuous circulation state in order to maintain a stable wellbore pressure and solve the problem of stopping due to conventional drilling in the process of making up, breaking out, connecting and unloading drill pipes. A series of abnormal problems caused by mud circulation in the well

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