Well drilling top drive running casing tool driving head

Abstract

The invention relates to a well drilling top drive running casing tool driving head serving as a transmission device used on the lower portion of a well drilling top drive. The well drilling top drive running casing tool driving head can increase the top drive functions, simplify the running casing operation, enhance the operate safety and be easy to maintain. According to the technical scheme, an electromagnetic brake magnet yoke is installed on an upper shell, an electromagnetic brake dynamic disc is installed on a main shaft through a spline, an axial fixing nut B is installed at the upper end of the electromagnetic brake dynamic disc, and the lower end of the electromagnetic brake dynamic disc is connected with a section of shaft shoulder. An electromagnetic brake armature is installed on an external thread through a rivet, the external thread is connected with an internal thread through a thread, an outer spline is arranged on the outer portion of the internal thread, an inner spline is arranged inside a lower shell, and the outer spline of the internal thread is connected with the inner spline of the lower shell. An upper travel switch is installed on the lower shell, and lower travel switches are installed at the lower ends of end covers of the shells. The driving head is simple and compact in structure, convenient to operate, low in cost, safe, easy to remotely control and reliable in usage.

Description

technical field [0001] The invention relates to a driving head of a top drive casing running tool for torque conversion and thrust transmission in drilling operations. The driving head of the top drive casing tool can be connected to the lower part of the top drive instead of the hydraulic cylinder device or screw transmission device in the conventional top drive casing tool to perform power transmission from the main shaft to the clamping device of the top drive casing tool drive head And conversion, which converts the torque on the main shaft into axial thrust and transmits it to the clamping device. It is an important supporting transmission device for the core component of the top drive in drilling operations. Background technique [0002] Top drive technology is one of several major changes (hydraulic disc brakes, hydraulic drilling pumps, AC variable frequency drives, etc.) since the advent of rotary table drilling rigs. At present, almost all shallow offshore drillin...

AI Technical Summary

Problems solved by technology

[0003] In view of the large loss of the hydraulic cylinder, low efficiency, high heat generation, when oil is used as the transmission medium, fire protection needs to be paid attention to, the processing precision of hydraulic components is high, the cost is high, the fault of the hydraulic system is difficult to find, and the technical level of the operator is required For advanced problems, an innovative top drive casing tool drive head is proposed, which uses electromagnetic brakes to convert the torque of the top drive spindle into axial thrust to simplify the structure of the top drive casing tool, increase the safety factor, and reduce the Cost and Manufacturing Difficulty

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