A kind of oil pipe and its application

Abstract

The invention discloses an oil pipe and an application thereof. The main points of the technical solution are: a sucker rod and a coupling arranged at the end of the sucker rod, and a sleeve detachably arranged at the connection between the sucker rod and the coupling A sheath is provided, a concave ring coaxial with the sheath is arranged inside the sheath, the part of the sucker rod located in the concave ring protrudes outward to form a first convex ring, and the coupling is located in the concave ring The part protrudes outward to form a second convex ring, and the inner wall of the concave ring is provided with a first snap ring and a second snap ring. When the sucker rod is disengaged from the coupling, the first snap ring is inserted into the first convex ring, and the second snap ring is The two snap rings are inserted into the second convex ring. When the thread between the sucker rod and the coupling fails, the sucker rod falls off the coupling. At this time, the first snap ring in the concave ring is inserted into the first convex ring, and the second snap ring is inserted into the second convex ring It can play a limiting role in the axial direction to prevent the sucker rod and the coupling from falling off, and the oil ejected from the gap between the sucker rod and the coupling will not be ejected immediately.

Description

technical field [0001] The invention relates to the field of oil production machinery, more specifically, it relates to an oil pipe and its application. Background technique [0002] With the reduction of reservoir energy and the increase of water content, oilfield development has entered a period of high water content. Due to reasons such as well deviation and casing bending deformation, the load on pumping wells continues to increase, and the corrosion and lubrication conditions of well fluids continue to deteriorate. The problem of eccentric wear of pumping well pipes and sucker rods is becoming more and more serious. In particular, in the current oilfield development, the corrosion of high water content and high salinity produced fluids has exacerbated the eccentric wear and corrosion of pipe rods in pumping wells. Due to the eccentric wear and corrosion of the pipe and rod of the pumping unit, not only the production cycle of the oil well is shortened, the number of ope...

AI Technical Summary

Problems solved by technology

[0004] The oil pipes in the prior art mainly include sucker rods, and couplings are provided at both ends of the sucker rods. The couplings and the sucker rods are only connected by threads. In actual use, when the couplings and the sucker rods After the thread between the rods is damaged, the threaded connection fails, the sucker rod is separated from the clamp, and the oil in the sucker rod will be sprayed out immediately, causing unnecessary waste and reducing the oil pipe's cost to a certain extent. reliability

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