Oil-water well breaking and stripping-preventing filling tool and construction method thereof

Abstract

The invention provides an oil-water well breaking and stripping-preventing filling tool and a construction method thereof. The filling tool comprises a lower valve body, wherein the lower valve body is provided with a lower valve body ball seat and a connecting sleeve, the lower valve body ball seat is connected with the connecting sleeve through a pin, the two ends of the connecting sleeve are connected with a central pipe and a flushing pipe connector separately, and a liquid flow groove or hole is formed in the lower portion of a body of the connecting sleeve. The breaking and stripping-preventing filling tool is connected to the upper portion of a sand control pipe column and is lowered to the designed position in a well, after the pressure is applied to the opening pressure of a filling opening, the filling opening of the filling tool is exposed, and forward extrusion filling construction is conducted from an oil pipe. According to the tool and the method, the design mode of a traditional sand control filling tool is changed, the lower valve body is divided into the lower valve body ball seat and the connecting sleeve, and thus the working reliability of the pin is guaranteed;and the problem that a pin on a lower valve body in an existing filling tool is cut off in advance in the operation process, resulting in failure of seat sealing is effectively solved, the success rate of filling construction is greatly increased, and the operation cost is effectively reduced.

Description

technical field [0001] The invention relates to a downhole filling sand control tool for oil and water wells in the petroleum industry, in particular to an oil and water well breakage prevention filling tool and a construction method thereof. Background technique [0002] Conventional filling sand control tools, such as 445-115 filling tools, are equipped with sealing rubber cylinder assembly, anchor assembly and reversing sleeve assembly, and are equipped with two ball seats, one on the lower valve body and the other on the flushing In the pipe joint, the ball seat in the lower valve body cooperates with the sealing ball for pressing. When pressing from the oil pipe, the rubber sleeve pushes the slips to be stuck on the casing, and continues to press the sheath to push the rubber sleeve, so that the rubber sleeve expands and seals the oil casing annular space, and at the same time the slips are tightly stuck on the casing to support and anchor After the sand control operat...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the existing filling tools, provide an oil-water well break-off prevention filling tool and its construction method, avoid the occurrence of pin shearing in advance, solve the operation failure caused by the failure of the seat seal, and improve the sand control filling construction The success rate, reduce operating costs

Images