Underground drill stem vibration damping and pressurizing device

A booster device and drill string technology, which is applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problems of high cost, fatigue damage of drill string, etc., and achieve the effect of simple structure, satisfactory working life and improved rock breaking efficiency

Active Publication Date: 2010-07-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the pressure of the drilling fluid is increased from the ground to the drill bit nozzle at the bottom of the well, the existing equipment and process need to be changed, which is expensive
In addition, stu

Method used

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  • Underground drill stem vibration damping and pressurizing device
  • Underground drill stem vibration damping and pressurizing device
  • Underground drill stem vibration damping and pressurizing device

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing, the present invention is further described, and it comprises upper conversion joint 1, sealing joint 2 on the spring, spring outer cylinder 3, spring 4, sealing joint 5 under the spring, central shaft 6, spline outer cylinder 7, Piston shaft 8, lock nut 9, water inlet valve 10, seal assembly 11, booster cylinder 12, booster cylinder centralizer 13, booster cylinder outer cylinder 14, water outlet valve 15, high pressure flow channel 16 and lower conversion joint 17. The upper conversion joint 1 is integrated with the spring upper plug joint 2, the central shaft 6 and the piston shaft 8. The central shaft 6 cooperates with the spline outer cylinder 7, which can be used to transmit torque and allow the central shaft 6 to move up and down. The central shaft 6. Connect the piston shaft 8 through the locking nut 9, the spring outer cylinder 3, the plugging joint 5 under the spring, the spline outer cylinder 7, the pressurized c...

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Abstract

The invention discloses an underground drill stem vibration damping and pressurizing device, which is a complete tool for use in oil and natural gas drilling operation and comprises an upper adapter, a spring, a central shaft, a piston shaft, a locking nut, a water inlet valve, a sealing assembly, a pressurizing cylinder, a pressurizing cylinder centralizing barrel, a pressurizing cylinder outer barrel, a water outlet valve, a high-pressure runner and a lower adapter. During drilling, when generating longitudinal vibration, a drill stem drives the adapters, a spring upper plug connector, the central shaft and the piston shaft to move up and down together relative to the pressurizing cylinder; and drilling fluid is sucked and compressed in the pressurizing cylinder. While transmitting power and circulating the drilling fluid, the device absorbs the energy generated in the vibration of the drill stem and converts the vibrational energy of the drill stem into the pressure of the drillingfluid to pressurize the drilling liquid at the bottom of the well. The device damps the vibration of the drill stem, protects the drill stem, increases the jet pressure of a drill bit nozzle and improves rock breaking efficiency.

Description

1. Technical field: [0001] The invention relates to a matching device used in oil and natural gas drilling operations, in particular to a downhole drill string vibration reduction and boosting device. 2. Background technology: [0002] Drilling operations need to break rocks as thick as thousands of meters, and the main factors affecting the rock-breaking efficiency are rock-breaking tools and methods. Practice has shown that increasing the jet pressure of the bottom hole drill bit nozzle during drilling can greatly improve the rock breaking efficiency and drilling speed of the drill bit. However, if the pressure of the drilling fluid is increased from the ground to the drill bit nozzle at the bottom of the well, existing equipment and processes need to be changed, which is expensive. In addition, studies have shown that the rotation of the drill string during the drilling process will cause the drill string to vibrate laterally and longitudinally, and this vibration often ...

Claims

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Application Information

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IPC IPC(8): E21B17/04E21B17/07
Inventor 管志川魏文忠刘永旺
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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