Quick plugging device

Abstract

The invention discloses a quick sealer which is used for sealing a pipeline of an oil or gas well head and blowout and can be withdrawn conveniently if necessary afterwards to benefit the reuse of a well shaft. The quick sealer comprises an elastic air bag, a steel tube which is inserted into the air bag and connected on the opening end of the air bag by sealing, a clapboard which can divide the space of the steel tube into an upper space and a lower space which are not communicated with each other, a check valve which is provided for pressure air to enter the lower space of the steel tube from the upper space of the steel tube, and an air vent which can communicate the lower space of the steel tube and the air bag space; the outer tube wall and the inner tube wall of the steel bar, extending out of the air bag are both provided with screw sections and respectively connected with a jointer by screws; the jointer can be an air intake jointer or an air discharge joint. Therefore, the quick sealer solves the problems that damages to people and livestock exist in the implementation of the sealing by using a current combined sealing component only by a well killing method, the consumption of labor and materials and the loss of oil or gas are great, the pollution period is long, the pollution range is large, and the well shaft is not liable to repeated use after the sealing, etc.

Description

technical field [0001] The invention relates to a plugging device capable of plugging the wellbore during maintenance of oil or natural gas wellhead equipment or pipelines, in particular to a device capable of instantly and reliably plugging sudden blowouts of oil and gas wells, and after eliminating blowouts , It can also be withdrawn from the wellbore conveniently and quickly, so that the wellbore can be restored quickly. Background technique [0002] As we all know, when repairing or replacing the wellhead equipment or pipelines of oil wells or natural gas wells, the relevant pipelines or wellbores must be blocked first to prevent oil or gas from blowing out; Block the wellbore, otherwise, oil and gas containing harmful gases such as hydrogen sulfide and carbon dioxide will be ejected with the loud blowout, and will quickly disperse due to the pressure, endangering people in a large area around it, livestock safety. Because there is no special apparatus at present, so e...

AI Technical Summary

Problems solved by technology

Although each component in the existing plugging assembly can be easily purchased from the market, it has the following disadvantages when the well is killed and plugged: 1) its plugging speed is slow, especially when it is used for blowout Because of its great danger, it is necessary to cooperate with many safety measures, such as demarcating the warning zone and safety zone and evacuating the surrounding people, clearing the obstacles around the wellhead, and even setting up a rescue headquarters and formulating rescue plans. It involves a wide range of areas, many operators, heavy workload, and takes a long time, so it not only prolongs the time for oil and gas spraying outside, causing greater waste, but also further expands the scope of pollution with the rapid diffusion of oil and gas, and intensifies the impact on Harm to people and animals; 2) To use the existing assembly to kill the well, operators must also be rich in operating experience, for example, to grasp the speed of pouring mud, because if the speed is slow, the plugging pressure will be too small and the plugging will be blocked. Oil and gas continue to blow out, but the speed is too fast and it will cause other adjacent wellbore blowout; 3) When using the existing assembly for plugging, the required plugging cost is relatively high, because the killing method not only Need to use heavy mud, but also will use the more expensive material of price, as quick-drying cement; 4) when wanting to recover the wellbore blocked by well killing method, just must invest a large amount of manpower and material resources again and carry out excavation, and this not only trouble is time-consuming , The workload is heavy, and the cost of exploiting oil and gas wells is also greatly increased

[0003] To sum up, when overhauling the wellhead equipment or pipelines of oil and gas wells, especially when eliminating blowouts, if the existing plugging assemblies including high-pressure cement trucks, mud pumps, high-pressure manifolds, etc. are used, there will be a The field is extremely tense, even very dangerous human sea battle, and it takes a long time, the waste of oil and gas is large, the pollution to the environment is serious, and it is extremely time-consuming, laborious and expensive to restore the use of the wellbore afterwards

Images