Well drilling top drive sliding fastening-change head assembly

Abstract

A drilling top drive sliding variable button assembly. It mainly solves the problems of complex structure and cumbersome operation of existing top drive variable shackles and drill pipe shackles. It is characterized in that: there is an annular step (2) outside the lower end of the manual blowout preventer (1), and a storage cavity is formed through the annular step (2) and the upper end of the variable button (4), and drilling fluid with a certain pressure is stored in the storage cavity; The lower end of the manual blowout preventer (1) is connected with a sliding sleeve (3), and the sliding sleeve (3) is connected with the variable button head (4) through a spline in the lower step hole, that is, the variable button head is connected to the variable button head through the spline. (4) The transmission torque can make the variable button (4) move up and down through the spline, which will reduce the weight on the variable button (4); the upper part of the variable button (4) spline A sealing ring (5) is built in the annular groove of the sliding sleeve (3), and a sealing ring (5) is built in the annular groove in the lower end hole of the sliding sleeve (3). The variable button assembly is not only simple in mechanism and operation, but also has the function of damping vibration.

Description

Technical field: [0001] The invention relates to a variable button used for top drive drilling rigs in the field of oil field drilling, in particular to a sliding variable button assembly for top drive drilling. Background technique: [0002] With the increase of deep wells, ultra-deep wells and complex wells in the process of oil and gas exploration and development, the demand for top drive drilling rigs in my country is becoming more and more urgent, especially for foreign bidding projects, it is almost impossible to win the bid without a drilling rig equipped with top drive . Top drives are now standard equipment on drilling rigs. The top drive device is a drilling device that directly drives the drilling tool from the top of the derrick for rotary drilling, and can complete various drilling operations such as circulating drilling fluid, connecting vertical roots, making up and breaking out, and back reaming. It can improve drilling efficiency, greatly reduce pipe sticki...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of complex structure and cumbersome operation of the existing top drive shackles and drill pipe shackles, the present invention provides a top drive sliding shackle assembly for drilling. The top drive sliding shackle assembly is not only simple in mechanism and operation , and has the effect of damping

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