A full-diameter infinite-stage fracturing tool for horizontal wells
A full-bore, infinite-stage technology, applied in wellbore/well components, wellbore/well valve devices, production fluids, etc., can solve problems such as easy sand sticking, many action steps, and long construction time, and achieve Improve yield, save construction time, and achieve high sand ratio
Active Publication Date: 2022-03-01
DONGYING FLUID SCI & TECH
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Problems solved by technology
With the stepped sliding sleeve structure, the internal diameter of the sliding sleeve decreases step by step, which limits the increase in displacement; the structure of the sliding sleeve for one-time multi-layer filling fracturing is limited by the length and diameter of the service tool string, and the layer spacing must be longer than The length and diameter of the tool string are limited by the influence of the flow channel of the service tool, the diameter is small, the friction resistance is large, and there are many action steps in the sand control process of filling, the construction time is long, and sand jams are prone to occur during the operation question
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[0018] The present invention will be further described below in conjunction with accompanying drawing.
[0019] A full-diameter infinite-stage fracturing tool for horizontal wells. The casing 1 is connected to one end of an external packer 2 through threads, and the other end of the external packer 2 is connected to one end of the casing 1. The other end of the casing 1 is threaded to one end of the fracturing tool 3, the other end of the fracturing tool 3 is threaded to an external packer 2 through the casing 1, and the bottom of the casing 1 is threaded There is a floating shoe 5; the fracturing tool 3 includes an upper joint 301, a lock ring A302, a sealing ring 303, a mechanical sliding sleeve 304, a sliding sleeve 305, a differential pressure sliding sleeve 306, a shear pin A307, a differential pressure sleeve 308, Ball seat 309, lock ring B310, shear pin B311, connection sleeve A312, anti-rotation pin 313, pressure transmission sleeve 314, rotation sleeve 315, central sh...
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The invention relates to the field of petroleum exploration and development, and provides a full-diameter infinite-stage fracturing tool for horizontal wells, wherein one end of the upper joint is connected to a casing, the other end is connected to one end of a sliding sleeve, and the other end of the sliding sleeve is connected to a connecting sleeve. The other end of the connecting sleeve A is connected to the connecting sleeve B, and the other end of the connecting sleeve B is connected to the bushing; the inner wall of the sliding sleeve is fixed with a mechanical sliding sleeve and a differential pressure sliding sleeve. The bottom of the ball seat is the central shaft, the connecting sleeve A fixes the central shaft, the pressure transmission sleeve is fixed on the central shaft, and the bottom of the central shaft is equipped with a spring; the inner diameter of the invention is consistent with the casing, which provides wellbore conditions for running large outer diameter tools; There is no need to put in the filling service tool, just throw the ball directly, open the fracturing tool layer by layer for operation, save construction time, solve the problem of sand stuck in the pipe string during the filling process; improve production and yield; the differential pressure sliding sleeve is equipped with a locking device, which is not blocked Open by mistake.
Description
technical field [0001] The invention relates to the field of petroleum exploration and development, in particular to a full-diameter infinite-stage fracturing tool for horizontal wells. Background technique [0002] At present, the fracturing technology of stepped sliding sleeve structure or the fracturing technology of one-time multi-layer filling fracturing sliding sleeve structure is generally adopted in China. With the stepped sliding sleeve structure, the internal diameter of the sliding sleeve decreases step by step, which limits the increase in displacement; the structure of the sliding sleeve for one-time multi-layer filling fracturing is limited by the length and diameter of the service tool string, and the layer spacing must be longer than The length and diameter of the tool string are limited by the influence of the flow channel of the service tool, the diameter is small, the friction resistance is large, and there are many action steps in the sand control process...
Claims
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IPC IPC(8): E21B43/04E21B43/26E21B34/14
CPCE21B43/04E21B43/26E21B34/142E21B34/063
Inventor 刘国滨焦青青许腾飞王威刘淑静赵飞飞吴常顺王宜凯
Owner DONGYING FLUID SCI & TECH