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The Significance and Components of Drill String Assembly

Drill string is the hub connecting the surface and the downhole.

Function and Material of the Drilling Rod String

The main functions of the drill string are: 1. Transmitting weight on bit and torque to the drill bit; 2. Providing a channel for the circulation of drilling fluid; 3. Serving as a conduit for core retrieval.

Common basic drilling tool assembly—Tower-type drilling tool assembly

The tower-type drill string consists of a series of drill collars with diameters gradually decreasing from bottom to top, forming a tower-like configuration above the drill bit.

Commonly used basic drilling assembly—pendulum drilling assembly

The pendulum drill string is a type of drill string assembly designed to reduce the well deviation angle. It utilizes the lateral component force of the drill collar weight below the tangency point in the deviated well to push the bit toward the lower side of the wellbore wall, thereby gradually reducing the deviation angle.

Commonly used basic drilling tool string — Full-hole drilling tool string

The full-hole drill string assembly, also known as the rigid match drill string or rigid full-hole drill string, is a drill string configuration installed at the lower part of the drill string. It features high stiffness and a small gap between the wellbore diameter and the outer diameter of the drill string, designed to prevent excessive inclination angles and wellbore curvature.

What are the causes of thread sticking in non-magnetic drill pipes

The emergence of non-magnetic drilling tools has indeed brought great convenience to our work, but there are still some situations that may occur during use, such as the phenomenon of non-magnetic drilling tool threads sticking. So, what are the reasons for the phenomenon of non-magnetic drilling tool threads sticking?

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