A construction method for natural gas exploitation well hole reinforcement

Abstract

The invention relates to a natural gas exploitation well hole reinforcement construction method. Natural gas exploitation well hole reinforcement construction equipment is used. The natural gas exploitation well hole reinforcement construction equipment comprises an installation frame, a protection device and a vibration device, the outer wall of the installation frame is provided with the protection device, the interior of the installation frame is provided with the vibration device, and the protection device is connected with the vibration device through a first spring telescopic rod. The method can solve the problems that a cement pipeline which is prepared through a pipeline mold in advance is used for reinforcing a natural gas well hole at present, the natural gas exploitation place is special, the transportation of the cement pipeline is difficult, the soil adhesion degree between the cement pipeline and the inner wall of the well hole is insufficient due to geological reasons, and natural gas leakage is caused; and therefore, there is a need for the equipment which can reinforce the gas exploitation well hole at the gas production site, but after the cement is reinforced, aprotection device on the outside of the cement is difficult to disassemble, so the follow-up work is delayed.

Description

technical field [0001] The invention relates to the technical field of natural gas exploitation, in particular to a reinforcement construction method for natural gas exploitation well holes. Background technique [0002] When natural gas is exploited, the drilled hole needs to be reinforced to bear the risks brought about by later natural gas exploitation, so as to ensure the safety of natural gas exploitation equipment and mining personnel. Due to the low density of natural gas, which is 0.75-0.8 kg / m3, wellbore gas The pressure of the column on the bottom of the well is small; the viscosity of natural gas is small, and the flow resistance in the formation and pipeline is also small; and because of the large expansion coefficient, its elastic energy is also large. Therefore, self-injection is generally used in natural gas extraction. This is basically the same as the self-spraying oil recovery method. However, because the gas well pressure is generally high and natural ga...

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Problems solved by technology

[0003] At present, for the reinforcement of natural gas well holes, most of them are installed with cement pipes made in advance through pipe molds. These pipes need to be prepared in places that specialize in the production of cement pipes and then transported to natural gas mining sites. Natural gas mining places are often In particular, it is more difficult for the transportation of cement pipelines, and in some areas due to geological reasons, if the cement pipelines are installed in the gas production wells, the adhesion between the cement pipelines and the soil on the inner wall of the wells will be insufficient, resulting in natural gas Leakage causes energy waste; therefore, a device that can reinforce the gas production well hole at the gas production site is needed, but although these devices can achieve better reinforcement of the gas production well hole, after strengthening with cement, the protective device outside the cement is really difficult Dismantling, which will cause delays in follow-up work

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