A fluid guider for externally thickened tubing

Abstract

The invention discloses a fluid guider used for an external thickened oil pipe, and belongs to the field of oil equipment. In the guider, a limiting step is arranged between a large-diameter pipe section and a small-diameter pipe section which sequentially communicate with each other; the inner diameter of the large-diameter pipe section is 3-5 mm greater than the outer diameter of an upsetting section of the external thickened oil pipe; the inner diameter of the small-diameter pipe section is 5-8 mm smaller than the outer diameter of the upsetting section of the external thickened oil pipe; a first radial through hole with an inner thread is formed in the side wall of the end portion of the large-diameter pipe section; and a limiting handle is in threaded connection with the first radial through hole in a matched mode. A sealing groove is formed in the inner wall of the large-diameter pipe section and used for containing a sealing ring; and the sealing ring makes sealed contact with the outer wall of the upsetting section of the external thickened oil pipe. A second radial through hole is formed in the side wall of the small-diameter pipe section, the end portion of a drainage pipe extends into the second radial through hole and is in sealed connection with the small-diameter pipe section, and a sealing end cap is detachably in sealed connection with the end portion of the small-diameter pipe section. The guider provided by the invention can safely and closely recycle high-temperature cleaning fluid or high-pressure flushing fluid and avoid pollution of the environment around a well site.

Description

technical field [0001] The invention relates to the field of petroleum equipment, in particular to a fluid guide for externally thickened oil pipes. Background technique [0002] Externally thickened oil pipe refers to the oil pipe whose internal threaded connection end of the oil pipe is thickened by upsetting and heat treatment process, which generally includes the pipe body and the thickened upsetting section, where the strength of the upsetting section is consistent with the strength of the pipe body , can meet the requirements of deep wells, and is used in the operation process of oil (gas) and water wells. After the operation of the outer thickened oil pipe is completed, it needs to be cleaned to ensure the service life of the outer thickened oil pipe. [0003] In the prior art, the externally thickened tubing is usually cleaned by the following method: the externally thickened tubing is pulled back to the tubing factory for cleaning, and then sent back to the well si...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the externally thickened tubing is usually cleaned by the following method: the externally thickened tubing is pulled back to the tubing factory for cleaning, and then sent back to the well site for use. This method is time-consuming and laborious.

Therefore, in most cases, with the help of a boiler truck, high-temperature cleaning fluid or high-pressure sprinting fluid is used to clean the inner wall of the externally thickened tubing on site, and then the waste fluid after flushing is discharged into the collection tank on the well site, while the high-temperature steam Diffusion directly into the outside air, which will cause environmental pollution

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