Auxiliary equipment for oil digging

Abstract

Disclosed is an assistive apparatus for oil exploitation, comprising a cylindrical body (1). Multiple annular grooves are arranged on the cylindrical body (1). The annular grooves divide the cylindrical body (1) into multiple rigid portions. A flexible portion (2) is arranged in the annular grooves. The height of the flexible portion (2) gradually decreases in a direction from an upper end of the cylindrical body (1) to a lower end of the cylindrical body (1). The flexible portion (2) comprises a leather layer (4). The leather layer (4) and the annular groove form a closed annular filling chamber. The annular filling chamber is filled with multiple first balls (5), multiple second balls (6), and multiple third balls (14). The assistive apparatus further comprises multiple protection mechanisms (3). The compressive strength at different points of the cylindrical body (1) is different, and the addition of the lower-cost flexible portion (2) not only reduces production costs of the cylindrical body (1), but also facilitates transportation and storage steps of the cylindrical body (1). The cylindrical body (1) can be adapted for a variety of soil environments, thereby improving the universality of a protective sleeve.

Description

technical field [0001] The invention relates to the field of petroleum machinery, in particular to an auxiliary equipment for petroleum excavation. Background technique [0002] The drill pipe is a steel pipe with a threaded tail, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or the bottom hole device at the bottom of the drilling well. As one of the important oil extraction equipment, the drill pipe can transport the drilling mud to the drill bit, and raise, lower or rotate the bottom hole device together with the drill bit. [0003] As the drill pipes are driven into the ground, they must be designed to withstand the enormous pressure from the soil. In order to increase the service life of the drill pipe, reduce the process cost, and prevent the drill pipe from being damaged due to soil extrusion during use, in the prior art, a protective sleeve is usually provided outside the conveying section of the drill pipe...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an auxiliary equipment for oil excavation, which solves the problem that the traditional drill pipe protection sleeve has high cost, is difficult to maintain, has poor universality and cannot well disperse the protection sleeve caused by the sudden increase of soil extrusion force. The problem of fragile cylinders

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