Downhole compression torsion balancing tool

Abstract

The invention relates to the technical field of petroleum well drilling, in particular to a downhole compression torsion balancing tool. A central pipe I of the downhole compression torsion balancingtool is installed in a hydraulic cylinder sleeve, and a boss is arranged at the upper end of the central pipe I, wherein the boss and the inner wall of the hydraulic cylinder sleeve are sealed; a baffle ring I is connected to the central pipe I, and an upper damping cavity is formed among the central pipe I, the hydraulic cylinder sleeve and the upper end face of the baffle ring I; the upper end of a central pipe II is installed on the outer side of the lower end of the central pipe I in a sleeving mode and can move up and down along the central pipe I, an elastic mechanism I is installed between the upper end face of the central pipe II and the baffle ring I, and the central pipe II is connected to a step on the inner wall of the hydraulic cylinder sleeve in a hung mode. The drill pressure of a drill bit can be automatically adjusted in real time, drilling torque is limited, thus the tool face is stabilized, the build-up rate is ensured, the influence of backing pressure of a drill tool on orientation is reduced, stable and high-speed drilling of the drill bit is guaranteed, the construction risk is reduced, and the downhole compression torsion balancing tool can be widely appliedto well drilling construction of a high-inclination well, a large displacement well and a horizontal well.

Description

Technical field: [0001] The invention relates to the technical field of petroleum drilling, in particular to a downhole pressure-torsion balancing tool. Background technique: [0002] In recent years, with the development of drilling technology and the needs of oil and gas field development, directional drilling technology has become an important way for efficient development of oil reservoirs. PDC bits are widely used due to their long working life, high drilling speed and excellent performance. However, the torque of the PDC bit is greatly affected by the WOB, pump displacement, and formation lithology changes during the sliding drilling process of directional wells. The following problems occur: (1) The torque is too large, and the jumping phenomenon is serious. The strong axial impact will exert too high WOB on the cutting teeth of the drill bit and induce slipping motion, which not only reduces the ROP and the footage of a single drill bit , which also increases the p...

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing PDC bit that are prone to excessive torque, slipping, jumping, and tool face instability when drilling in difficult-to-drill formations

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