A motor-driven top drive casing running tool

Abstract

The invention provides a motor drive type top drive casing running tool. Threads are arranged at the upper end and the lower end of an upper central spindle respectively, the upper thread of the upper central spindle is connected with a top drive device, and the lower thread of the upper central spindle is connected with a lower central spindle. A motor drive system is arranged on the outer side of the upper central spindle. A bolt at the lower end of the motor drive system is connected with a power transmission system which is internally provided with a slip system. During work, a big gear wheel of the motor system converts the rotation movement of a motor into axial driving force of a slip through the thread transmission of the lower end, so that the slip is expanded along a wedge surface, and then the aim that the inner wall of a casing is braced tightly by the slip is achieved. By the adoption of motor drive instead of hydraulic drive, the tool is safer and more environmental-friendly; the slip is provided with lateral slip teeth and circumferential slip teeth so that the capacity of the tool to transmit the top drive torque can be improved, wherein the lateral slip teeth and the circumferential slip teeth are staggered; meanwhile, by means of the tool, the casing can be rotated, lifted and laid down at any time, the slurry circulation can be achieved at any time, accordingly the casing running working performance and safety are improved, and the integrated drilling cost is reduced.

Description

technical field [0001] The invention relates to the technical field of oil and gas well cementing equipment, in particular to a motor-driven top drive casing running tool. Background technique [0002] The purpose of casing operation is to isolate the formation, strengthen the well wall, prevent oil and gas leakage, and establish oil and gas passages. It is an extremely important link in the process of oil and gas drilling operations. The casing running tool is the key equipment to complete the casing operation. The conventional casing running equipment mainly includes: wellhead slips for clamping casing, hydraulic casing tongs for casing twist, intermittent Tools such as open grouting device for grouting, casing elevator for lifting casing, etc. [0003] The above-mentioned conventional casing running equipment has the following problems: (1) It is difficult to accurately control the make-up torque of the casing thread by using the casing tongs; (2) The mud cannot be circu...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned conventional casing running equipment has the following problems: (1) It is difficult to accurately control the make-up torque of the casing thread by using the casing tongs; (2) The mud cannot be circulated in time as required by using the intermittent grouting device. Especially when the casing running encounters resistance, the kelly must be reconnected to establish mud circulation to remove sediment, which affects the casing running efficiency; (4) Conventional casing running equipment still has disadvantages such as complex operation, low operating efficiency, and low safety and reliability

However, the hydraulic oil of the above-mentioned hydraulic casing running tool is easy to leak and pollute the environment, and the hydraulic system is greatly affected by the external environment; while the above-mentioned mechanical casing running tool has the disadvantage of complex structure, and the range of torque transmitted by the slips is relatively large. Small size, unable to adapt to various working conditions such as casing rotation and casing make-up

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