Reflux tank structure to improve the accuracy of return judgment

Abstract

The invention discloses a return groove structure capable of improving accuracy of return judgment. The return groove structure comprises a main groove with a liquid level sensor and an auxiliary groove which is arranged side by side with the main groove, wherein N flow channels are formed at positions, facing a liquid level sensor, between the main groove and the auxiliary groove and are distributed vertically; a partition board which is suspended on the top surface is fixed to the inner side of each flow channel, a pressure sensor is arranged on the surface of one side, facing the auxiliary groove, of the partition board; a horizontal shaft arranged on the side wall of each flow channel is movably connected with a connecting plate towards the direction of the main groove; the horizontal shaft is located between the corresponding partition board and the auxiliary groove and is installed at 1 / 2 position of the height of the corresponding flow channel; the connecting end between each flow channel and main channel is provided with M projections which are uniformly distributed along the inner wall of the flow channel in the circumferential direction and the projections are provided with pointed cone ends toward the direction of the main channel. The return groove structure can solve the problem that the liquid level can not be accurately judged after the debris is deposited in the mud groove in the prior art, and can revise the detection height of the liquid level sensor in a slurry tank conveniently .

Description

technical field [0001] The invention relates to the field of oil exploitation, in particular to a backflow tank structure for improving the precision of return judgment. Background technique [0002] Mud tank, also known as drilling fluid tank and backflow tank, is a tank that passes between the wellhead and the solid control equipment when the drilling fluid flows back from the wellhead to the sedimentation tank or mud tank during the drilling and completion of oil production. It is used to convey the mud with cuttings or formation sand returned from the well. The mud tank is the sampling place for drilling fluid logging, which is of great significance for mud logging. Liquid level sensors are installed in the mud tanks to monitor the amount of drilling fluid returned, so that it is convenient for engineers to judge whether there is overflow, lost circulation or kick, etc. at the first time. Therefore, the liquid level signal measured by the liquid level sensor in the mud...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a backflow tank structure that improves the accuracy of return judgment, so as to solve the problem in the prior art that it is impossible to accurately judge the height of the return liquid level after debris deposition in the mud tank, so as to realize the convenient return of liquid in the mud tank. The purpose of correcting the detection height of the bit sensor

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