Pull-discharging general-purpose drip

Abstract

The invention relates to a pull-discharge type universal drip capable of effectively preventing accidents because the drip can not be opened. The universal drip comprises an upper joint 1, a pull rod 3, a drip body 4, a lower joint 8, a shear pin 5, a shearing ring 6 and a pull ring 7, wherein the upper joint 1 is connected with the pull rod 3; the lower end of the drip body 4 and the lower joint 8 are connected, and are sleeved outside the pull rod 3; the outer wall of the drip body 4 is radially provided with the shear pin 5; the shearing ring 6 in shearing fit with the shear pin 5 is arranged on the inner wall close to the drip body 4; and the pull rod on the lower part of the shearing ring 6 is connected with the pull ring 7. During site operation, a fixing assembly is connected in series between a third oil pipe and a fourth oil pipe on a pump, and a traveling assembly is connected in series between a first pumping rod and a second pumping rod on the pump. The device can make a defueling pump piston with the diameter of below phi 57 millimeter smoothly pass through an oil pipe with the diameter of phi 73 millimeters, and a defueling pump piston with the diameter of phi 70 millimeters smoothly pass through an oil pipe with the diameter of phi 89 millimeters. When oil-well construction requires oil draining, the pumping rod is lifted to open an oil drainage hole.

Description

technical field [0001] The invention relates to a downhole tool used for draining oil from oil pipes of pumping wells in oil production wells, that is, a pull-drain type universal oil drainer. Background technique [0002] In order to solve the problem of oil leakage from the tubing when checking the pump in the well of the pumping unit, scientific and technical personnel in the oil exploitation industry have developed various oil drainers. According to the classification of oil drain, there are mainly throwing rod impact open type oil drainer; pressure slip type oil drainer; pull open type oil drainer; rotary open type oil drainer. Although the above-mentioned oil drainers have their own advantages, their disadvantages also exist. The main performance is that the throwing rod hits the open oil drainer. Due to the high viscosity of crude oil in some oil wells and the bending of the wellbore, the sliding speed of the throwing rod is affected. The impact force generated is sm...

AI Technical Summary

Problems solved by technology

Although the above-mentioned oil drainers have their own advantages, their disadvantages also exist. The main performance is that the throwing rod hits the open oil drainer. Due to the high viscosity of crude oil in some oil wells and the bending of the wellbore, the sliding speed of the throwing rod is affected. The impact force generated is small, and the oil drain cannot be opened; to press the slip-off type oil drain, to open the oil drain, a pump truck needs to be used to pressurize the wellhead, and the construction cost is high; If the oil pipe of ф73mm is used, it can only pass through the piston with a pump diameter of ф44mm or more. To pass through the piston with a pump diameter of ф44mm or more, the oil pipe of ф89mm must be used above the drainer, and the material cost is high; the rotary open type oil drainer needs to be opened. , it is necessary to rotate the oil pipe at the wellhead, the construction is complicated and the cost is high

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