High-pressure fine filtering manifold and filtering method thereof

Abstract

The invention relates to a high-pressure fine filtering manifold and a filtering method thereof which are mainly suitable for being applied to an oil and gas well drilling and grinding cyclic operation ground process. The manifold mainly comprises two high-pressure filtering short sections, seven manual flat gate valves, two pipeline five-way joints, four pipeline three-way joints and a manifold pipeline; the filtering manifold is of a one-in one-out structure, the two sides are controlled by adopting the manual flat gate valves and the high-pressure filtering short sections, and the middle is directly arranged. The high-pressure fine filtering manifold has the benefits that under the filtering action of the two high-pressure filtering short sections, the convenient replacement of the short sections is ensured, the uninterrupted and continuous drilling and grinding fluid cyclic filtration treatment and control are realized, the filtering capacity, the filtering efficiency and the filtering quality of mechanical impurities in drilling and grinding fluid are greatly improved, the purposes of drilling and grinding fluid cyclic fine filtration and utilization are achieved, and the erosion damage caused by the large-sized mechanical impurities in the drilling and grinding fluid to the downstream choke manifold is avoided; the high-pressure fine filtering manifold is good in continuous cyclic filtration effect, strong in practicability and suitable for being applied to the oil and gas well drilling and grinding cycle operation ground process.

Description

technical field [0001] The invention relates to a high-pressure fine filter manifold and a filter method thereof, which are mainly applicable to the surface process of oil and gas well drilling and grinding circulation operations. Background technique [0002] During the drilling and grinding process of conventional tubing and coiled tubing, there are mechanical impurities such as bridge plug debris, slip fragments, and gravel in the drilling fluid returned from the annulus of the wellbore oil casing. The grinding liquid is finely filtered. [0003] At present, debris traps are used in the surface process to capture mechanical impurities in the returned drilling fluid, but the capture effect is not good, and some large-sized mechanical impurities in the drilling fluid still flow into the downstream throttling manifold. Seriously cause erosion damage to the fixed nozzles, needle valves, pup joints, manual flat valves and other manifold parts of the choke manifold, which grea...

AI Technical Summary

Problems solved by technology

[0003] At present, debris traps are used in the surface process to capture mechanical impurities in the returned drilling fluid, but the capture effect is not good, and some large-sized mechanical impurities in the drilling fluid still flow into the downstream throttling manifold. Seriously cause erosion and damage to the fixed nozzles, needle valves, pup joints, manual flat valves and other manifold parts of the choke manifold, which greatly affects the treatment effect of mechanical impurities in the drilling and grinding fluid and the throttling control effect

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