Upper turnover plate self-locking mouse hole chuck

Abstract

The invention relates to an upper turnover plate self-locking mouse hole chuck which comprises a column-shaped shell, a guide mechanism and a locking mechanism, wherein the guide mechanism and the locking mechanism are arranged in the shell; the guide mechanism comprises an upper turnover plate of guide pillars; the upper turnover plate sleeves the guide pillars through sliding grooves; the center of the upper turnover plate is provided with a drill hole; the locking mechanism comprises two sliding blocks which are symmetrically arranged in the left-right direction; each of the sliding block sleeves the guide pillars of the guide mechanism and are in a state of sliding along the oblique lines of the guide pillars ; eccentric round sliding grooves are respectively formed in the inner sides of the sliding blocks; tooth plates are respectively arranged in the sliding grooves. The sliding blocks which are symmetrically arranged in the left-right direction stably move up and down along with the upper turnover plate, and the eccentric round sliding grooves which are respectively formed in the inner sides of the sliding blocks are respectively provided with the tooth plate; when the upper turnover plate is pressed by a female joint of a drill rod and is driven to move downwards, the sliding blocks are close to the center along the sliding grooves and cling to the drill rod; the two tooth plates arranged in the eccentric round sliding grooves which are symmetrically formed in the inner sides of the two sliding blocks rotate around a shaft of the drill rod in the eccentric round sliding grooves along with the drill rod, are deadly locked with the sliding grooves, and can tightly hold the drill rod.

Description

technical field [0001] The invention relates to the field of petroleum machinery, in particular to an upper flap self-locking mouse hole chuck. Background technique [0002] In oil drilling operations, it is necessary to continuously add spare drill pipes from the mouse hole to increase the drilling depth. The spare drill pipe is left empty in the mouse hole, and the bottom of the mouse hole is filled with sand and gravel. Sand and gravel, the mouse hole is exposed at the upper end of the drill pipe (button end). When adding spare drill pipes, the male kelly is connected to the female shank at the upper end of the spare drill pipe. When the kelly is rotated and hooked up, the spare drill pipe is driven to rotate. The male shank at the lower end of the drill pipe is severely worn in the sand and gravel, which seriously affects the drill pipe. The service life of the drill pipe increases, the cost of oil drilling is increased, and when the spare drill pipe is docked next time...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art that the spare drill pipe is placed in the mouse hole and the lower end of the work buckle is seriously worn, which affects the service life and has potential safety hazards, the present invention provides a compact structure that can effectively guide and clamp the spare drill pipe. A self-locking mouse hole chuck with an upper flap

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