Hydraulic propeller for fishing spear

Abstract

The invention relates to the technical field of a fishing spear propelling device, in particular to a hydraulic propeller for a fishing spear. The hydraulic propeller for the fishing spear comprises an upper main body and a lower main body, wherein the lower end of the upper main body is fixedly provided with the lower main body; the inside of the lower part of the upper main body and the inside of the upper part of the lower main body are respectively provided with a mutually-corresponding liquid passing groove, and a liquid passing cavity is formed; and the upper main body is provided with a liquid inlet communicated with the liquid passing cavity. The hydraulic propeller for the fishing spear has the advantages of restorable and compact structure and convenience in use. The hydraulic propeller is installed on the upper part of the fishing spear, and liquid is injected into the liquid inlet and is sprayed out from a liquid spraying through hole after passing through the liquid passing cavity. When the liquid is injected out, the hydraulic propeller has downward thrust, and the fishing spear can be driven to quickly and smoothly reach a fishing point. The hydraulic propeller for the fishing spear can be used under the well situation such as high fluid viscosity and big negative pressure difference in a shaft, and the applicability is strong. A steel wire rope is adopted to convey, so that less auxiliary equipment is used, and therefore the hydraulic propeller for the fishing spear has the advantages of low labor intensity, high fishing efficiency and strong practicality.

Description

technical field [0001] The invention relates to the technical field of spear-fishing propulsion devices, and relates to a spear-fishing hydraulic propulsion device. Background technique [0002] In the oil and gas well engineering of the petroleum industry, it is often encountered that fishing spears are used to fish downhole tools; that is, the fishing spears are transported downhole, and the tools that fall into the well are salvaged out of the well; Rods, oil pipes and oil extraction pipes transport the fishing spear; the fishing spear is transported by the wire rope, and the fishing spear descends to the predetermined position under the action of its own weight; if the viscosity of the fluid in the wellbore is high or the negative When fishing the target in the well or horizontal well, the fishing spear cannot reach the predetermined fishing point smoothly under the action of its own weight, and the purpose of fishing the downhole tool cannot be realized, and the applica...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a hydraulic thruster for fishing spears, which overcomes the shortcomings of the above-mentioned prior art, and can effectively solve the problem of high fluid viscosity or large negative pressure difference in the wellbore when steel wire ropes are used to transport fishing spears. , unable to achieve salvage, poor applicability; and when using drill pipes, oil pipes and oil suction pipes to transport salvage spears, a large amount of equipment is used, the construction period is long, the cost is high, and the practicability is poor

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