Downhole compression torsion balancing tool

A balance and tool technology, applied in the direction of drilling tools, drilling equipment, drilling automatic control system, etc., can solve problems such as tool surface instability, excessive torque, slipping, etc., to reduce construction risks, ensure build-up rate, reduce The effect of small directional influence

Active Publication Date: 2018-11-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing PDC bit that are prone to excessive torqu...

Method used

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  • Downhole compression torsion balancing tool

Examples

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Embodiment Construction

[0020] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a downhole pressure torsion balance tool includes an upper joint 1 and a hydraulic cylinder liner 2, the lower end of the upper joint 1 is connected to the liquid cylinder liner 2; the central pipe I3 ​​is installed in the liquid cylinder liner 2, and the upper end of the central pipe I3 ​​is provided with a The sealing boss between the inner walls of the cylinder liner 2, the center pipe I3 ​​is connected with the stop ring I5, the upper damping chamber is formed between the center pipe I3, the liquid cylinder liner 2 and the upper end of the stop ring I5, and the upper end of the center pipe II11 is set on the center pipe I3 The outer side of the lower end can move up and down along the central tube I3, and the elastic mechanism I9 is ​​installed between the upper end surface of the central tube II11 and the retaining ring I5. 2 moves up and down and can rotate with the cylinder liner 2, the lower dampin...

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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...

Claims

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Application Information

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IPC IPC(8): E21B12/00E21B44/04
CPCE21B12/00E21B44/04
Inventor 韩龙施连海高玮李春吉徐涛黄志强
Owner BC P INC CHINA NAT PETROLEUM CORP
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