Oil pipe

Abstract

The invention provides an oil pipe. The oil pipe comprises a first oil pipe, a second oil pipe, a connector, a first groove, a projection and an anti-rotation body, wherein the first oil pipe and the second oil pipe longitudinally extend, the connector is provided with a first end and a second end which are opposite, the first end is used for being connected with the first oil pipe, the first groove recessed from the end face of the second end to the first end is formed on the side wall of the connector, the projection protrudes out of the side wall of the second oil pipe and is provided with a first operating surface and a second operating surface which are opposite in the circumference of the second oil pipe, a notch is formed by the first operating surface, the second operating surface and the side wall of the second oil pipe adjacent to the first operating surface and the second operating surface; the anti-rotation body can be received in the first groove and the notch. By the oil pipe, the purpose for preventing rotation of the oil pipe at the joint is achieved.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular to an oil pipe. Background technique [0002] Oil pipe is a necessary operation tool for oil and natural gas exploitation. Generally, hundreds of oil pipes are threaded to form a thousands-meter-long pipe string during operation, and then lowered into the wellbore for oil production. [0003] When producing oil, the oil well pump is usually connected to the lower end of the oil pipe, and is lowered into the wellbore along with the oil pipe. In the oil production system of the rod pump, the sucker rod (the uppermost section is called the polished rod) of the oil pump is connected with the donkey head of the pumping unit on the ground through a hanger. When working, the donkey head pulls the hanger through the wire rope to drive the sucker rod to move up and down to complete the oil pumping operation. Under the alternating load of up and down strokes, in addition to the well ...

AI Technical Summary

Problems solved by technology

Especially in oil wells using SAGD technology, because SAGD oil wells generally use oil well pumps with a pump diameter of 120mm or more, the sucker rod will produce greater twist during the up and down movement. In order to prevent the twist of the sucker rod, the existing Plug-in sucker rods are generally used in the technology, but the result of this is to release the twisted torque of the sucker rod to the oil pipe, and the torque acts on the joint of the oil pipe to form a breakout force on the upper and lower oil pipes, so that the oil pipe The connection is loosened under the action of the breakout force, causing the oil leakage in the tubing, and even the connection of the tubing is caused by the torque to cause the tripping of the tubing, which affects the production of the oil well.

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