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Toe end sliding sleeve capable of repeatedly testing pressure

A technology of toe end and sliding sleeve, which is applied in the field of toe end sliding sleeve that can be tested for multiple times, can solve the problems of inability to construct, the sliding sleeve cannot be opened, and the sliding sleeve opening time is too short to meet the pressure test requirements of the casing. Effects of Fracturing Demand

Pending Publication Date: 2022-03-18
四机赛瓦石油钻采设备有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used toe-end differential pressure sliding sleeve is a time-delay type sliding sleeve to meet the casing pressure test requirements. It is too short to meet the pressure test requirements of the casing, or the sliding sleeve cannot be opened, resulting in the failure of construction and other problems.

Method used

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  • Toe end sliding sleeve capable of repeatedly testing pressure
  • Toe end sliding sleeve capable of repeatedly testing pressure
  • Toe end sliding sleeve capable of repeatedly testing pressure

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Embodiment Construction

[0022] In order to make the object, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0023] It is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. indicate an orientation or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should n...

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Abstract

The toe-end sliding sleeve comprises an upper connector, a center pipe, a movable guide ring, a piston rod, a piston, a stop ring, a ball, a spring, a rupture disk and a lower connector, the center pipe is sequentially sleeved with the movable guide ring, the spring, the stop ring and the piston, and the upper connector is arranged at one end of the center pipe in a sleeving mode and movably connected with the movable guide ring; the upper connector, the center pipe and the piston are sleeved with the lower connector, the lower connector is connected with the upper connector, the ball is installed between the movable guide ring and the center pipe in a rolling mode, the rupture disc is installed on the upper connector, a first kidney-shaped hole is formed in the center pipe, and the first kidney-shaped hole is communicated with the first kidney-shaped hole. The lower connector is sleeved with a second kidney-shaped hole corresponding to the first kidney-shaped hole, and the piston can move between the first kidney-shaped hole and the second kidney-shaped hole.

Description

【Technical field】 [0001] The invention relates to the technical field of downhole operations, in particular to a toe-end sliding sleeve capable of multiple pressure tests. 【Background technique】 [0002] At present, the commonly used toe-end differential pressure sliding sleeve is a time-delay type sliding sleeve to meet the casing pressure test requirements. It is too short to meet the pressure test requirements of the casing, or the sliding sleeve cannot be opened, resulting in the failure of construction and other problems. [0003] In view of this, it is necessary to provide a novel toe-end sliding sleeve capable of multiple pressure tests to overcome the above-mentioned defects. 【Content of invention】 [0004] The purpose of the present invention is to provide a sliding sleeve at the toe end that can be used for multiple pressure tests. The sliding sleeve can only be opened after pressing and releasing pressure from the wellhead three times. There are no restriction...

Claims

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Application Information

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IPC IPC(8): E21B34/10E21B43/26E21B47/06
CPCE21B34/10E21B43/26E21B47/06
Inventor 邹刚杨小城李应虎卢刚王鹏钱雪余修明鄢标
Owner 四机赛瓦石油钻采设备有限公司
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