MWD hoisting system and control method thereof

Abstract

The invention provides an MWD hoisting system and a control method thereof. The MWD hoisting system comprises a first embracing ring and a second embracing ring which are symmetrically arranged, and ahinge piece is arranged between the first embracing ring and the second embracing ring; a spiral locking mechanism and a first motor are arranged at the joint part of the other side, and the first motor drives the spiral locking mechanism to move so as to drive the two embracing rings to move close to each other or separate from each other, so that MWD equipment is locked or released; the spirallocking mechanism comprises a first thread sleeve, a second thread sleeve and a screw rod spirally matched with the first thread sleeve and the second thread sleeve, the screw rod is a flexible shaftscrew rod, a coupling gear is fixed to one end of the screw rod, and a first motor drives the coupling gear to rotate and drives the screw rod to rotate synchronously; and one of the first screw sleeve and the second screw sleeve is provided with a right-handed screw thread, and the other one is provided with a left-handed screw thread, so that the first screw sleeve and the second screw sleeve move close to each other or separated from each other when the screw rod rotates. According to the MWD hoisting system, effective hoisting of the MWD equipment can be achieved, and the damage to the equipment due to excessive tightening and the loosening risk caused by excessive tightening are prevented.

Description

technical field [0001] The invention relates to the technical field of measurement while drilling (MWD), in particular to a MWD hoisting system and a control method. Background technique [0002] In the construction of directional wells and horizontal wells in drilling exploration and development, MWD instruments are often used due to the needs of technology. When hoisting MWD instruments out of the well, entering the well, and going up and down the drilling floor frequently, it is necessary to use rope sets to hoist and bind the MWD instruments, which may easily cause slipping and falling off the well. accidents or injuries. Without ensuring safety, it will not only bring difficulties to the next step of work, but also work efficiency and work safety cannot be guaranteed. [0003] For this reason, in the prior art, a method of using an annular hoop structure to fix and then hoist the hoop is proposed. However, large-diameter bolts are used to fix the hoop, and the wrench i...

AI Technical Summary

Problems solved by technology

[0002] In the construction of directional wells and horizontal wells in drilling exploration and development, MWD instruments are often used due to the needs of technology. When hoisting MWD instruments out of the well, entering the well, and going up and down the drilling floor frequently, it is necessary to use rope sets to hoist and bind the MWD instruments, which may easily cause slipping and falling off the well. accidents or injuries

Without ensuring safety, it will not only bring difficulties to the next step, but also work efficiency and work safety cannot be guaranteed

[0003] For this reason, in the prior art, a method of using an annular hoop structure to fix and then hoist the hoop is proposed. However, large-diameter bolts are used to fix the hoop, and the wrench is used to tighten and lock the hoop. It is not sure whether it is tightened in place during the process, it is easy to cause over-tightening and damage to MWD equipment

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