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Scouring-resistant small rotary valve pulser

The technology of a pulser and a rotary valve is applied in the field of petroleum exploration to achieve the effects of simple structure, convenient installation and disassembly, and prolonging service life.

Pending Publication Date: 2020-04-28
BEIJING LIUHE GREATNESS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the invention is to provide a small erosion-resistant rotary valve pulsator, which solves the problem that the rotary valve pulsator is used in a drill collar with a diameter less than 4 inches

Method used

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  • Scouring-resistant small rotary valve pulser
  • Scouring-resistant small rotary valve pulser

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Embodiment 1

[0022] Embodiment one: Figure 1-Figure 2 It shows a small scouring-resistant rotary valve pulsator, including a pulsator body and a valve head assembly connected to the pulsator body. The valve head assembly is mainly composed of: a fishing head 1, a stator holder 2, and a stator 3 , rotor 4, wear-resistant ring 5, semicircular key 6, valve body shell 7, extrusion ring 8 and wear-resistant sleeve 9 are combined, the extrusion ring 8 is connected with the main body of the pulser, and the wear-resistant sleeve 9 is arranged between the main body of the pulsator and the extrusion ring 8, the valve housing 7 is fixedly connected with the main body of the pulsator through bolts, the fishing head 1, the stator holder 2, the stator 3 and the rotor 4 are connected from They are connected sequentially from left to right and placed in the valve body casing 7, the wear-resistant ring 5 is arranged on the inner wall of the valve body casing 7, the semicircular key 6 is arranged on the in...

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PUM

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Abstract

The invention discloses a scouring-resistant small rotary valve pulser. The scouring-resistant small rotary valve pulser comprises a pulser main body and a valve head assembly connected with the pulser main body, wherein the valve head assembly is mainly composed of a fishing head (1), a stator fixing device (2), a stator (3), a rotor (4), a wear-resisting ring (5), a woodruff key (6), a valve body shell (7), an extrusion ring (8) and a wear-resisting sleeve (9). The scouring-resistant small rotary valve pulser is simple in structure, can be used in a drilling tool with the size smaller than 4inches and has no special requirement for machining of a drill collar; in addition, the a valve body outer shell is arranged, so that mud does not make direct contact with the inner wall of the drillcollar, the service life of the drill collar is accordingly prolonged; and meanwhile, the rotary pulser is a small-diameter valve body outer shell, and a small-diameter stator fixer is designed in amatched mode, an inner hole of a suspension nipple is properly enlarged, so that the pulser is integrated before being mounted in the suspension drill collar, and convenient mounting and dismounting can be achieved.

Description

technical field [0001] The invention relates to the field of oil exploration, in particular to a scour-resistant small rotary valve pulser. Background technique [0002] At present, the mud pulse generator is an important component of the logging while drilling and measurement system. The rotary valve pulser is a commonly used pulse generator system; Due to the large size of the stator and rotor, the rotary valve pulse used in the 4-inch drilling tool is limited in size, and the design is difficult. [0003] The existing design scheme is: the pulser cancels the valve body casing, the pulser valve head assembly is directly installed in a special suspension drill collar, and the inner wall of the drill collar is used as the valve body casing. [0004] The design has the following deficiencies and needs to be improved: [0005] 1. Customized drill collars require high processing precision and high processing costs; [0006] 2. The mud directly contacts the inner wall of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/18
CPCE21B47/18
Inventor 冯建宇李轶武曾庆锋
Owner BEIJING LIUHE GREATNESS TECH