Hydraulic switch sliding sleeve, separate-layer fracturing pipe column and using method
By designing a hydraulic switch slip sleeve, the coordination of the pawl slip sleeve, the opening slip sleeve and the inner closing slip sleeve is solved, and the problem of conventional slip sleeve cannot be closed is realized, multi-stage layered fracturing and testing is realized, the construction steps are simplified, and the cost and cycle are reduced.
CN119641292APending Publication Date: 2025-03-18CNPC BOHAI DRILLING ENG +1
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Patent Information
- Application Number
- CN202311197922.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-18
- Publication Date
- 2025-03-18
AI Technical Summary
Technical Problem
In the prior art, conventional sliding sleeves cannot be closed during fracturing construction, resulting in the inability to achieve separate testing of each layer, which is complex in the process, high in cost and long in the cycle.
Method used
A hydraulic switch sliding sleeve is designed, including a sliding sleeve body, an inner closing sliding sleeve, a pawl sliding sleeve and an opening sliding sleeve. Through the coordination of the pawl sliding sleeve, an opening sliding sleeve and an inner closing sliding sleeve, multi-stage layered fracturing and testing are achieved.
Benefits of technology
Separate testing of each layer is realized, simplifying construction steps, reducing workload and construction costs, and shortening construction cycle.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to the technical field of oil and gas field development, in particular to a hydraulic switch sliding sleeve, a separate layer fracturing pipe column and a using method, and aims to solve the problems of complex construction process, large workload, high construction cost and long construction period in the fracturing process. The hydraulic switch sliding sleeve comprises a sliding sleeve cylinder, an inner closing sliding sleeve, a pawl sliding sleeve and an opening sliding sleeve, wherein the inner closing sliding sleeve and the pawl sliding sleeve are inserted into the sliding sleeve cylinder, and the sliding sleeve cylinder is sleeved with the opening sliding sleeve. The pawl sliding sleeve is arranged below the inner closing sliding sleeve; a sand blasting opening is formed in the side wall of the sliding sleeve cylinder; in the initial state, the pawl sliding sleeve and the opening sliding sleeve block the sand blasting opening on the inner side and the outer side of the sliding sleeve cylinder correspondingly. The hydraulic opening and closing action of the sliding sleeve is achieved through ball throwing, separate layer fracturing and separate layer testing operation can be achieved through one pipe column, the operation efficiency is improved, the operation difficulty, workload and risk are reduced, the construction cost can be effectively reduced, and the construction period is shortened.
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