Pumping-type opening tool and full-gauge stepless multi-cluster sliding sleeve

By designing a pump-type opening tool and a full-bore stepless multi-cluster sliding sleeve, the problems of discontinuous construction and full-bore limitation of existing multi-cluster fracturing tools are solved, realizing efficient and continuous multi-cluster fracturing construction, and improving operational efficiency and construction continuity.

CN117404049BActive Publication Date: 2026-06-09CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2022-07-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing technologies, multi-stage and multi-cluster fracturing tools have problems such as many operation procedures, long construction time, high cost, and discontinuous construction. In addition, the conventional ball dropping method has limited number of stages and cannot achieve full bore.

Method used

A pump-type opening tool, including a spring and an outer cylinder structure, is used to achieve stepless opening of multiple clustered sliding sleeves through the cooperation of a conical boss and a conical groove. Clustered sliding sleeves and conventional sliding sleeves are set on the fracturing string to form a full-bore stepless multi-clustered sliding sleeve. The sliding sleeve is opened by using a pressure-shearing pin.

Benefits of technology

It enables efficient and rapid continuous construction without changing the existing wellhead equipment or adding equipment, achieving large-volume fracturing with multiple discharges at a time, improving operational efficiency, ensuring the continuity of construction of multiple sliding sleeves, and preventing erosion and jamming hazards in the sliding sleeve groove.

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Abstract

The application provides a pumping opening tool, comprising: a spring plate, which comprises a cylindrical part and a plurality of circumferentially distributed spring plate claws; and an outer cylinder, which is provided with a plurality of axially extending milling grooves; wherein the spring plate claws are provided with bearing protrusions, the two radial wings of the bearing protrusions are provided with tapered bosses, the two radial wings of the milling grooves are provided with tapered cutting grooves, the spring plate claws can freely fold and freely rebound in the milling grooves under the cooperation of the tapered bosses and the tapered cutting grooves, and the tapered bosses can correspond to and engage with the tapered cutting grooves, so that the pumping opening tool can be lowered into a pipe string and sequentially open a plurality of stepless multi-cluster sliding sleeves. The application also provides a full-gauge stepless multi-cluster sliding sleeve, which comprises a plurality of cluster sliding sleeves that are sequentially connected in a pipe string, and the pumping opening tool can sequentially open a plurality of the cluster sliding sleeves.
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