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Disk valve type pressure excitation tool

A disk valve and pressure technology, which is applied in vibration generating devices, drilling equipment, drilling equipment and methods, etc., can solve the problems of difficult casing running, high cost, and high borehole friction resistance, etc., and achieve improved casing The effect of pipe running ability, reduced frictional resistance, strong and simple tool structure

Pending Publication Date: 2019-07-05
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For extended-reach wells and horizontal wells with long horizontal sections, the wellbore friction is often high due to engineering problems. To solve the problem of casing running, engineers and technicians have researched and developed various methods and measures, such as floating casing and rotating casing technology, but due to the high cost or the limitation of the current process conditions, there are limitations

Method used

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  • Disk valve type pressure excitation tool
  • Disk valve type pressure excitation tool
  • Disk valve type pressure excitation tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, with reference to Figure 1-5 As shown, a disc valve type pressure excitation tool includes a static valve housing 1, a movable disc valve 2, a thrust bearing 3, a pre-tightened disc spring 4, a lock nut 5, a spline shaft 6, a turbine shaft 7, Turbine housing 13 , turbine rotor 15 and turbine stator 16 .

[0026] Among them: the static valve housing 1 is a cylindrical body, the lower end of the static valve housing 1 is airtightly connected with the turbine housing 13 to form the outer shell of the tool, the inner upper part of the static valve housing 1 is provided with a static valve disc 102, the surface of the static valve disc 102 is There is an offset flow hole on the top; the moving disc valve 2 is a cylindrical body, the upper end is a moving valve disc 201, and the moving valve disc 201 is provided with the same offset flow hole as the static valve disc 102, and the moving valve disc The lower part of the 201 is a disc valve handle 202 with a red...

Embodiment 2

[0027] Embodiment 2, a disc valve type pressure excitation tool includes a static valve housing 1, a moving disc valve 2, a thrust bearing 3, a pre-tightened disc spring 4, a lock nut 5, a spline shaft 6, a turbine shaft 7, Overcurrent bearing 8, adjusting sleeve 9, guide sleeve 10, bearing cover 11, bearing cylinder 12, turbine housing 13, key 14, turbine rotor 15 and turbine stator 16, etc.

[0028] as attached figure 1 As shown, the static valve housing 1 and the turbine housing 13 are threadedly connected to form the tool housing, the upper surface of the movable disc valve 2 is in contact with the disc surface of the static valve housing 1 at its static valve disc, and the movable disc valve 2 is formed by a stop in the middle. The thrust bearing 3 is supported, and the thrust bearing 3 is supported by the pre-tightened disc spring 4 and the lock nut 5 arranged in sequence. The shaft 6 is connected with the turbine shaft 7, and the turbine shaft 7 is axially arranged wit...

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Abstract

The invention relates to a disk valve type pressure excitation tool. The disk valve type pressure excitation tool is used for lowering a casing in a wellbore with high frictional resistance, and is connected to the lowermost end of a casing string. The disk valve type pressure excitation tool includes a static valve shell, a movable disk valve, a thrust bearing, a pre-tightening disc spring, a locking thread sleeve, a turbine shaft, a turbine rotor, a turbine stator and the like. The static valve shell and a turbine shell are connected in a threaded mode to form a tool outer shell, and the upper disk surface of the movable disk valve is attached to the static valve shell at a static valve disk of the static valve shell in a pre-compressed mode. The movable disk valve is supported by the thrust bearing, and the thrust bearing is supported by the pre-tightening disc spring and the locking thread sleeve which are arranged in sequence. The locking thread sleeve is fixedly connected to theinner wall of the static valve shell in a threaded mode, the turbine rotor is fixed to the turbine shaft and capable of rotating along with the shaft, and the turbine stator is fixed to the turbine shell. When drilling fluid is circulated and when the static valve disk and the movable disk valve are rotating, the drilling fluid intermittently generates high pressure at the disk valve and forms intermittent thrust to enable the casing string at the lower end to be in a vibrating state, the friction resistance of the casing string can be effectively reduced, and the ability of lowing the casingis improved.

Description

technical field [0001] The invention relates to the technical field of casing running tools for wellbore engineering in oil and gas fields, in particular to a disc valve type pressure excitation tool. Background technique [0002] For extended-reach wells and horizontal wells with long horizontal sections, the wellbore friction is often high due to engineering problems. To solve the problem of casing running, engineers and technicians have researched and developed various methods and measures, such as floating casing And rotary casing and other technologies, but due to the high cost or the limitation of the current process conditions, there are limitations. Research shows that, in the case of running casing by conventional methods, when the casing running force and frictional resistance are in the critical state of equal due to the high borehole friction, the total resultant force of the casing string distributed along the axis is zero. The vicinity is in a compressed state...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/20E21B28/00
CPCE21B7/20E21B28/00
Inventor 陈勇聂云飞裴学良张锐王彬周洪国张辉
Owner 中石化石油工程技术服务有限公司