Method of building oil dredging well channel

Abstract

The invention discloses a method of building an oil dredging well channel, and relates to the field of oil and gas exploitation. The method comprises the following steps that construction vehicles arereasonably placed according to the practical situation of a well site, and a water-tank lorry, among the construction vehicles, is connected with a wellhead casing pipe valve by a high-pressure waterhose in a slipping mode, so that an oil well is detected; a well plugging device, a spray-proof pipe, a connecting-opening conversion device, a wellhead conversion sealer and an anti-channeling limiter are mounted on a wellhead of the oil well in sequence; and a tubular column is lowered into a tight-pull position in a well shaft by a crane among the construction vehicles, wherein the tubular column comprises a nozzle with spray-holes in the radial direction, a plurality of quick connected hollow nipples and the like from bottom to top. Thick or congealed crude oil on the wall surface of a casing pipe can be treated in a place with a relatively small area in the well site, and then the oil dredging channel is quickly built; and compared with minor repair operation, the operation cost is effectively reduced.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular to a method for establishing an oil well channel. Background technique [0002] In oil wells with high crude oil viscosity, for example, when the viscosity of crude oil is about 10,000 centipoise, the crude oil will condense when the temperature drops. crude oil, which will lead to the problem of difficulty in oil pumping and lowering. [0003] At present, the main method to solve the problem that oil wells cannot be fished due to viscous crude oil is downhole minor repair operation. Specifically, the operation machine is used to run the tubing into the well and perform circular hot washing to thoroughly clean the viscous oil on the casing wall of the wellbore. crude oil and scaling, but the above-mentioned operation method has the following problems: the first operation requires sufficient area around the well site to place derricks, place oil pipes, and park hot-wash pump ...

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Problems solved by technology

[0002] In oil wells with high crude oil viscosity, for example, when the viscosity of crude oil is about 10,000 centipoise, the crude oil will condense when the temperature drops. Crude oil, so there will be a problem that it is difficult to extract oil and pump it down

[0003] At present, the main method to solve the problem that oil wells cannot be fished due to viscous crude oil is downhole minor repair operation. Specifically, the operation machine is used to run the tubing into the well and perform circular hot washing to thoroughly clean the viscous oil on the casing wall of the wellbore. crude oil and scaling, but the above-mentioned operation method has the following problems: the first operation requires sufficient area around the well site to place derricks, place oil pipes, and park hot-wash pump trucks and water tank trucks. The well site cannot meet the operation and construction conditions; secondly, after the operation channel is established, it is necessary to move the operating machine and clean the oil pipes in the well site before the next oil fishing operation can be carried out. Condensation forms and blocks thick oil, which makes it difficult to lower the oil pump

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