Pitching device for oil field staged fracturing

A ball-throwing device and staged fracturing technology, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of cumbersome operation process, limited number of balls, difficult operation, etc. Efficiency, simple structure effect

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the existing pitching device for oil field construction, such as complex structure, cumbersome or even difficult operation, and limited number of pitches, the present invention provides a pitching device capable of multi-ball pitching, which has pitching holes on both sides The pitcher, through the reciprocating motion of the pitcher, alternately pitches the ball to achieve multi-ball delivery

Method used

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  • Pitching device for oil field staged fracturing

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Embodiment Construction

[0025] Such as figure 1 The shown pitching device for staged oilfield fracturing includes a rotating hand wheel 1, a lock nut 2, a screw cover 3, a push-pull rod 4, a ball pitching device 5, a ball pitching device body 6, a sealing ring 7, a hydraulic cylinder seat 8 and a hydraulic cylinder seat 8. Cylinder 9. Wherein, the rotating hand wheel 1 performs the ball throwing operation manually under the failure of the hydraulic cylinder; the lock nut 2 connects the rotating hand wheel 1 with the push-pull rod 4 and fixes it; 6; the push-pull rod 4 is connected with the rotating handwheel 1, and together with the rotating handwheel 1, manual pitching can be realized when the hydraulic cylinder cannot be used for pitching; When the device 5 reciprocates in the pitching hole, alternate pitching can be realized; the left and right ends of the top of the pitching device body 6 also have a pitching hole respectively, and the ball is thrown in the pitching device 5 through the pitching...

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Abstract

The invention discloses a pitching device for oil field staged fracturing. The pitching device comprises a pitching device body (6) and a sealing ring (7). The sealing ring (7) is arranged in the pitching device body (6) to achieve sealing of the body and other parts. The pitching device for oil field staged fracturing is characterized in that a pitching machine (5) and a liquid cylinder (9) are further included, the pitching machine (5) and the liquid cylinder (9) move in a reciprocating mode in the pitching device body (6), pitching holes are formed in the left ends and the right ends of the tops of the pitching machine (5) and the pitching device body (6), and the liquid cylinder (9) is connected with the pitching device body (6) through a liquid cylinder base (8). The pitching device is simple in structure, alternating pitching can be achieved, and pitching efficiency is improved.

Description

technical field [0001] The invention relates to a construction device for staged fracturing in an oil field, in particular to a ball-throwing device for staged fracturing in an oil field. Background technique [0002] In the production and development of low-permeability oil and gas fields and shale gas fields, since there are multiple reservoirs in the formation, each reservoir needs to be exploited in one or more stages, so staged fracturing is required, and multi-stage ball-dropping staged fracturing is required. Crack construction process to open the sliding sleeve. In the above process, as the number of fracturing stages increases, the number of balls to be dropped also increases. At present, the mode of opening the wellhead and directly throwing the ball is often adopted, and the ball throwing device is seldom used to throw the ball. Most of the existing pitching devices are single-ball pitching devices, which usually need to be operated at close range, and the wellh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
Inventor 吴姬昊戴文潮罗法毅尹慧博秦金立姚辉前
Owner CHINA PETROLEUM & CHEM CORP
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