Fiber filling device for oilfield fracturing and filling method thereof

Abstract

Provided is a fiber filling device for oilfield fracturing. A chassis 1 is connected with a hydraulic pump 3 through a power takeoff of the chassis 1. A suction inlet of a jetting centrifugal pump 6 is connected with a liquid suction manifold 5, and a drainage outlet of the jetting centrifugal pump 6 is connected with a jetting manifold 7. The other end of the jetting manifold 7 is connected with a liquid inlet of a fiber conveying mixer 10 which is installed on the tail of a whole automobile. The lower portion of the fiber conveying mixer 10 is fixed to a framework 2, and the upper portion of the fiber conveying mixer 10 is inlaid in the middle of an operation platform 13. An outlet of the fiber conveying mixer 10 is connected with a liquid drainage manifold 11. An electrical control cabinet 14 is installed below the operation platform 13 and used for controlling starting and shutdown of the filling device, the fiber amount, the drainage speed of a liquid mixture and the like. A jetting pump motor 15 is connected with the jetting centrifugal pump 6. The fiber filling device for oilfield fracturing can achieve quick and high-efficiency fiber filling and ensure mixing uniformity of fibers and a fracturing solution.

Description

technical field [0001] The invention belongs to a fiber filling device and filling method for oil field fracturing. Background technique [0002] Fiber-sand fracturing utilizes the suspended sand-carrying capacity of fibers in the fracturing fluid and the immobilization capacity of proppant to prevent backflow of proppant in the fracture network of the reservoir, which can effectively increase the oil and gas production of a single well. This technology is being promoted and applied It is necessary to solve the problem of fiber filling. (1) The specific gravity of fiber is light and it is not easy to disperse. In the fracturing fluid, problems such as fiber agglomeration and uneven addition are easy to occur, and in severe cases, sand plugging will affect the fracturing operation; (2) fracturing construction The medium-sand ratio is in a state of change. Different sand ratios require different amounts of fiber. The ratio accuracy of fiber and fracturing fluid needs to be acc...

AI Technical Summary

Problems solved by technology

[0003] The currently used fiber addition method is mainly pneumatic conveying, that is, the fiber is conveyed by the pneumatic blowing of the air compressor. After the fiber is blown under positive pressure, it is separated by a cyclone, and the fiber falls into the mixing tank of the sand mixer under the action of gravity. Mixing with fracturing fluid requires the use of auxiliary equipment such as fiber pumps, cyclones, and cranes during the entire transportation process. The construction process is complex. At the same time, because the fibers are suspended in the upper layer of the mixing tank, the residence time of the fracturing fluid in the mixing tank is short. , the mixing uniformity of fiber and fracturing fluid is difficult to meet the requirements of construction technology

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