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Fracturing device

A fracturing and switching technology, applied in wellbore/well valve devices, wellbore/well components, and production fluids, etc., can solve the problem of reducing the inner diameter of the wellbore, reducing the oil production efficiency of the oil well, and failing to realize the large-diameter production channel of the wellbore and other problems to achieve the effect of improving oil production efficiency

Pending Publication Date: 2022-05-13
PETROCHINA CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In the related technology, the inner diameter of each sliding sleeve decreases sequentially, resulting in a decrease in the inner diameter of the wellbore after fracturing, which cannot realize the large-diameter production channel of the wellbore, thereby reducing the oil production efficiency of the oil well

Method used

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Embodiment Construction

[0054] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0055] This embodiment provides a fracturing device, which includes: multi-stage sequentially connected fracturing mechanisms. Such as figure 1 As shown, the fracturing mechanism includes an upper joint 1 , a body 2 , a sliding sleeve 3 , a lower joint 4 , a switch nipple 5 and a soluble ball 6 . The lower end of the upper joint 1 is connected with the upper end of the body 2 . The lower end of the body 2 is connected with the upper end of the lower joint 4 . The sliding sleeve 3 is arranged inside the body 2 through the shear pins 7 . The inner surface of the sliding sleeve 3 is p...

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Abstract

The invention provides a fracturing device, and belongs to the field of fracturing operation in oil and gas field development, the fracturing device comprises a plurality of stages of fracturing mechanisms which are connected in sequence, each fracturing mechanism comprises an upper connector, a body, a sliding sleeve, a lower connector, a switch short section and a soluble ball, a circumferential groove is formed in the inner surface of each sliding sleeve, and the upper connector and the lower connector are connected in sequence. Longitudinal seams and bosses matched with the circumferential grooves are evenly distributed on the outer surfaces of the switch short sections, the minimum inner diameters of the sliding sleeves of all the stages of fracturing mechanisms are the same, the lengths of the circumferential grooves are different, the minimum outer diameters of the switch short sections of all the stages of fracturing mechanisms are the same, and the lengths of the bosses are different. According to the device, the boss of the switch short section is matched with the circumferential groove of the sliding sleeve, the multiple sliding sleeves with the same inner diameter can be opened through the switch short section of the multi-stage fracturing mechanism, then a large-drift-diameter production channel of a shaft is formed through the multiple sliding sleeves with the same inner diameter, and the oil production efficiency of an oil well is improved.

Description

technical field [0001] The invention relates to the field of fracturing operations in the development of oil and gas fields, in particular to a fracturing device. Background technique [0002] After the production of the oil well reaches a certain stage, the production capacity and permeability decrease, which leads to a decrease in the oil discharge capacity; in order to improve the oil discharge capacity, it is often necessary to perform staged fracturing of the oil well through a fracturing device, so as to improve the oil discharge capacity and thus improve the oil discharge capacity of the oil well. output. [0003] In the related art, the fracturing device includes a multi-stage fracturing mechanism, and the multi-stage fracturing mechanism is connected end to end through a casing. Each stage of the fracturing mechanism includes a body and a sliding sleeve, and the sliding sleeve is located inside the body. When fracturing, put the sealing ball into the fracturing me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B34/14
CPCE21B43/26E21B34/14
Inventor 赵涛田福春赵玉东付大其张胜传刘学伟贾云鹏尹顺利
Owner PETROCHINA CO LTD
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