Coal bed gas well pulverized coal salvaging, water pumping gas production integrated tubular column

Abstract

The invention discloses a coal bed gas well pulverized coal salvaging, water pumping gas production integrated tubular column, which is applied to a coal bed gas well for water pumping gas production, and is characterized in that a coal bed gas well casing is internally provided with a combined pulverized coal sand-settling pipe; an upper adapter connector at the upper end of the combined pulverized coal sand-settling pipe is connected with a screen pipe; the upper end of the screen pipe is connected with a coal bed gas well special plunger pump; the upper end of the tubular column adapter connector of the coal bed gas well special plunger pump is connected with an oil pipe; the upper end of the oil pipe achieves the wellhead; the oil pipe is internally provided with a pumping rod; and the lower end of the pumping rod is connected with the roofbolt adapter connector of the coal bed gas well special plunger pump. The tubular column has the following effects: the influence of the pulverized coal produced in the coal bed gas well production process on the whole water pumping gas production system can be eliminated or reduced; and when the pump is inspected, the combined pulverized coal sand-settling pipe at the bottom is lifted to the ground together with the tubular column, so that the pulverized coal can be cleared and the subsequent pulverized coal salvaging operation can be saved.

Description

technical field [0001] The invention relates to the technical field of coalbed methane mining, in particular to a drainage and gas production pipe string under coalbed methane extraction, which is an integrated pipe string for coal mining, drainage and gas production in a coalbed gas well. Background technique [0002] In recent years, a new type of clean energy --- coalbed methane has gradually attracted people's attention, and the exploration and development of coalbed methane has also been increasingly developed. From coalbed methane drilling to coalbed methane mining, countries have invested a lot of manpower, material resources, financial resources. [0003] At present, most of the coalbed methane well drainage and depressurization systems used in the field are based on the oil pumping system in the oil well, including sucker rods, oil pumps, oil pipes and other tools and equipment. Most of the oilfield mining equipment and technologies used in coalbed methane wells ca...

AI Technical Summary

Problems solved by technology

The overshot is used on site to fish for coal powder, and only a small amount of coal powder can be fished each time. Each well needs to be pulled down several times to complete the coal powder salvage work, which not only increases the workload of the operation, but also greatly increases the operation time and cost

In addition, due to the difference between the pumping medium in the coalbed methane well and the medium in the oil well, when the plunger pump with good performance in the oil well is used in the coalbed methane well, the fixed valve and the floating valve are frequently deposited in the valve. Powder stuck faults, these faults all indicate that the existing oil well pumps and production process strings are not completely suitable for the drainage and pressure reduction of coalbed methane wells, and it is necessary to study the proprietary technologies and tools for coalbed methane well production

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