High temperature submersible motor protector

Abstract

A high-temperature submersible motor protector belongs to the technical field of lifting of a high-temperature oil well. The protector comprises a shell, wherein a protector shaft is arranged in the shell, the lower end of the protector shaft is arranged in the shell by a plane bearing, and the upper end of the protector shaft is fixedly provided with a sand throwing device assembly; a protector head is arranged at the lower side of the sand throwing device assembly, a cavity at the upper side of the sand throwing device assembly is communicated with a mechanical sealing cavity through a well liquid through hole, and a safety valve is arranged on the protector head; a corrugated pipe assembly is arranged in the shell between the protector head and a shaft protection pipe assembly, and a sandwiched space formed between an inner pipe and an outer pipe of the corrugated pipe assembly is communicated with the mechanical sealing cavity through a breathing hole; a shaft protection pipe is arranged outside the protector shaft, a gap is reserved between the shaft protection pipe and the protector shaft, one end of the shaft protection pipe is connected with a first support body, the other end of the shaft protection pipe is matched with an inner hole of the protector head in a sliding way, and an oil through hole is arranged at the upper end of the shaft protection pipe; an oil injection valve is arranged on an intermediate body; and a tail seat of a second motor oil hole is arranged at the lower end of the shell, and a transportation cap is arranged at the lower end of the tail seat.

Description

technical field [0001] The invention belongs to the technical field of high-temperature oil well lifting, and in particular relates to a high-temperature submersible motor protector which can effectively solve the sealing protection of high-temperature horizontal well or inclined well submersible electric pumps. Background technique [0002] The high temperature motor is one of the key components of the high temperature electric submersible pump. Because it is working underground, it is necessary to prevent the well fluid from entering the high-temperature motor. The function of the high temperature submersible motor protector is mainly to balance the pressure inside and outside the motor cavity, isolate the well fluid and motor oil, and prevent the well fluid from entering the motor. In addition, it also bears the weight of the pump shaft and the axial force generated by the pump wheel. These forces are transmitted to the plane bearing in the protector through the contact ...

AI Technical Summary

Problems solved by technology

Precipitation protectors are not suitable for horizontal or inclined placement, while the elastic capsule of capsule protectors does not have sufficient tensile strength and temperature resistance, so both protectors are not suitable for high temperature wells

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