Heat preservation and insulation hollow sucker rod for oil field

Abstract

The invention belongs to the technical field of tubing oil well pumps, and particularly relates to a heat preservation and insulation hollow sucker rod for an oil field. The heat preservation and insulation hollow sucker rod comprises sucker rod bodies, wherein the bottommost sucker rod body is located in an inner cavity of a pump cylinder, and a plunger and a fixed valve are arranged in the inner cavity of the pump cylinder. The heat preservation and insulation hollow sucker rod has the beneficial effects that in the process that oil is pumped up, due to the ground temperature gradient reason (an oil pipe is not subjected to heat preservation and insulation), the temperature is lower and lower, hot water passes through the heat preservation and insulation hollow sucker rod, enters the oil pipe through a water distributor at the bottom of the heat preservation and insulation hollow sucker rod and is mixed with oil (stratum output liquid), thus the oil temperature is increased, dewaxing and condensation of crude oil are reduced, smooth and efficient oil pumping is facilitated, and the pipeline cannot be blocked; and in the process that the water flows in the pipeline, due to the heat preservation effect of a filler of a nano carbon fiber heat insulation elastomer, the water cannot be cooled, thus the effect that the hot water heats the oil can be effectively kept, and the situation that dewaxing and condensation are blocked in the process that the oil is pumped up is avoided.

Description

technical field [0001] The invention relates to the technical field of tubular oil well pumps, in particular to a heat-insulating hollow sucker rod used in oil fields. Background technique [0002] The oil well pump refers to the downhole device driven by the pumping unit to lift the crude oil in the well to the ground. Ordinary oil well pump is mainly composed of four parts: pump barrel, suction valve, piston and discharge valve. According to the fixing method of the oil pump in the well, it can be divided into tube pump and rod pump; the oil pump is the downhole equipment for pumping oil; the liquid it pumps contains sand, wax, water, gas and corrosive substances, and When working in a well from hundreds of meters to thousands of meters, the pressure in the pump can be as high as 10 MPa or more; therefore, its working environment is complex and the conditions are harsh, and the quality of the pump directly affects the production of the oil well; therefore, the oil well pu...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the object of the present invention is to provide a heat-insulating hollow sucker rod used in oil fields. Through the hollow sucker rod, the sucker rod is covered with an inner steel pipe by an outer steel pipe, and the outer steel pipe and the inner steel pipe are filled with thermal insulation. Thermal material, so as to ensure that the hot water enters the downhole tubing from the wellhead to heat effectively, so that the oil will not solidify into blocks during the pumping process, and solve the problem that the sucker rod of the existing tubular pump is solid without downhole mixing. Water tracing, during the oil pumping process, as the oil is pumped upwards, the ground temperature becomes lower and lower, and the crude oil begins to gradually dewax and condense, making it difficult to pump oil, and it is easy to block the pipeline

Images