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Agitator

A technology of agitator and flow area, which is applied to the driving device for drilling in the wellbore, drilling equipment, earthwork drilling and production, etc., and can solve the problem that the flow path cannot be completely closed

Active Publication Date: 2012-05-02
国民油井华高井下工具欧亚有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to maintain fluid flow through the agitator, the valve must never fully close the flow path

Method used

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Embodiment Construction

[0040] will now refer to the attached figure 1 , illustrates an agitator 10 according to a preferred embodiment of the present invention. The agitator comprises an elongate tubular body 12 for forming part of a tubing string (not shown). Correspondingly, the auxiliary pieces 14, 15 forming the ends of the main body are provided with suitable box and pin 16, 17 connections. The central part of the body 12 forms the stator 18 of the Moineau principle positive displacement motor 19 . As such, the stator 18 includes a metal sleeve 20 that houses an elastomeric body 22 that effectively defines a relatively large coarse thread. A stainless steel rotor 24 extends through the stator 18 and cooperates with the stator body 22 to create a series of sealed chambers. These chambers or cavities progressively move through the stator 18 as the rotor 24 is rotated. By applying a sufficient pressure differential across the motor 19, the cavity is effectively pushed down through the stator 1...

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Abstract

An agitator comprises: a main body which is suitable for installing on the support component; a positive displacement motor with stator and rotor; and a valve. The rotor oscillates by rotating and moving widthwise in the stator when using, and the valve includes an oscillating first valve component and an oscillating valve component. Each valve component limits the opening of the valve and has main longitudinal axis; the first valve component connects to the rotor and moves relative to the second valve component. The valve component cooperates conjointly to limit the change flow area. At least one opening of the valve component offsets from each main longitudinal axis.

Description

technical field [0001] The present invention relates to an agitator, in particular to an agitator for use in a downhole environment. Background technique [0002] The applicant has proposed different arrangements for providing tubing string agitation for various purposes: see eg US Patent Nos. 6,279,670 and 6,439,318 and International Patent Applications WO 02 / 20940 and PCT / GB2004 / 004503, the disclosure of which is incorporated herein by reference. [0003] In the agitator arrangement described in US Patent No. 6,279,670, a valve arrangement is provided which provides a periodic variation of the flow area through the valve. This in turn creates a pressure pulse in the fluid flowing through the valve, which can be used to energize an impact tool. In order to maintain fluid flow through the agitator, the valve must never fully close the flow path. [0004] Embodiments of the invention relate to improved structures of such agitator arrangements. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/02
Inventor 阿兰·马丁·埃迪森理查德·亚历山大·英尼斯
Owner 国民油井华高井下工具欧亚有限责任公司