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Compound vibrating well-drilling tool

A drilling tool and compound vibration technology, applied in the direction of drilling with vibration, can solve problems such as low drilling efficiency, and achieve the effect of prolonging the life of the drill bit, reducing the drilling cost and increasing the ROP.

Active Publication Date: 2015-01-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of low drilling efficiency due to the "drag pressure" and "stick-slip" phenomena in the drilling process of highly deviated wells, the research shows that if the drill string vibrates during the drilling process, the friction and torque of the drill string can be effectively reduced

Method used

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  • Compound vibrating well-drilling tool
  • Compound vibrating well-drilling tool
  • Compound vibrating well-drilling tool

Examples

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Embodiment Construction

[0028] In this embodiment, the place where the drilling fluid enters the drilling tool is defined as the upper part, and the place where the drilling fluid exits the drilling tool is defined as the lower part; each sub joint mentioned below has a hollow channel for the liquid to flow.

[0029] Such as figure 1 with figure 2 As shown, it is an embodiment of the composite vibration drilling tool of the present invention, including a sleeve, which includes an upper sleeve 2, a middle sleeve 6 and a lower sleeve 11; wherein, the upper sleeve 2 and the middle sleeve The cylinders 6 are connected by double male sleeves 4 . The sleeve adopts a split structure, which facilitates the installation and disassembly of its internal components, and is easy to manufacture.

[0030] A vibrating nipple 1 is installed inside the upper sleeve 2, and the bottom of the vibrating nipple 1 is threadedly connected with a vibrating nipple chuck 16. The bottom of the vibrating nipple chuck 16 is pro...

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Abstract

The invention discloses a compound vibrating well-drilling tool which comprises a sleeve, a vibrating short joint, a vibrating short joint chuck, a screw motor, a conversion short joint connected with the lower end of the screw motor, an annular disc sleeved at the upper end of the conversion short joint, a hydraulic cylinder installed at the lower end of the conversion short joint, an impact short joint arranged in an inner cavity of the hydraulic cylinder and a torque transmitting short joint, wherein the vibrating short joint, the vibrating short joint chuck, the screw motor, the conversion short joint, the annular disc, the hydraulic cylinder, the impact short joint and the torque transmitting short joint are arranged in sequence from top to bottom. The well-drilling tool can be installed at different positions in a well-drilling column, the drilling column generate axial and circumferential high frequency compound vibration through the tool, and phenomena including 'pulling press' and 'stick slip' in the large-inclination well drilling process are eliminated, thereby remarkably improving mechanical drilling speed, prolonging the service life of a drill bit and reducing well-drilling cost.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a compound vibration drilling tool. Background technique [0002] Use the PDC bit (that is, the English abbreviation of Polycrystalline Diamond Compact, polycrystalline diamond compact bit) to drill highly deviated wells (that is, directional wells with a ratio of drilling deviation length to vertical depth greater than 2 and well inclination angles between 60° and 86°) When drilling, because part of the drill string is against the low side of the wellbore, there will be a lot of friction and torque between the drill string and the borehole during the drilling process, so that the drilling pressure and torque cannot be smoothly applied to the drill bit. . There are usually two consequences under this working condition: one is that the drilling pressure cannot be effectively applied to the drill bit, resulting in a "drag pressure" phenomenon, resulting in extremely l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/24
Inventor 王瑞和王鹏倪红坚
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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