A dynamic leak plugging instrument and a dynamic leak plugging method using the dynamic leak plugging instrument
A dynamic and leak-instrument technology, used in earth-moving drilling, wellbore/well components, sealing/packing, etc., can solve the problems of inconsistency in on-site leak-stopping effect, small size, affecting the accurate evaluation of leak-stopping materials, etc.
Active Publication Date: 2016-06-22
CHINA NAT OFFSHORE OIL CORP +3
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Problems solved by technology
Compared with the actual fracture leakage channel, the size is small, and the dynamic change behavior of the fracture size cannot be truly simulated, which seriously affects the dynamic simulation of leakage and the accurate evaluation of plugging materials, resulting in inconsistency between indoor evaluation results and field plugging effects
Method used
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[0037] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0038] Such as figure 1 As shown, the embodiment of the present invention provides a dynamic leak plugging instrument, comprising: a plugging agent cavity 5 with an upper cover 5-1, the upper cover 5-1 and the upper opening of the plugging agent cavity 5 It is sealed and detachably connected and has a test pressure inlet; a leakage chamber 7 with an upper opening; a drive chamber 8 with a driving pressure inlet; a taper plug 3-1, a piston 3-3 and a taper plug 3 fixedly connected Linkage mechanism 3 of connecting rod 3-2 between -1 and piston 3-3; pressure supply device 2 for...
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A dynamic leakage stoppage instrument and a dynamic leakage stoppage method relate to the field of indoor leakage stoppage in petroleum and natural gas industries, can meet the underground high-temperature and high-pressure demands and more really stimulate the underground leakage state. The dynamic leakage stoppage instrument comprises a leakage stoppage agent cavity body with an upper cover, a leakage cavity body with an upper opening, a driving cavity body with a driving pressure inlet, a connection rod linkage mechanism with a wedge plug and a piston, a pressure supplying device for providing testing pressure and driving pressure demanded by the testing, a testing pressure valve for starting / closing testing pressure, and a flow regulator for limiting the speed for applying the testing pressure, wherein the upper cover is hermetically and detachably connected with an opening in the leakage stoppage agent cavity body and is provided with a testing pressure inlet; the connection linkage mechanism is fixedly connected between the wedge plug and the piston.
Description
technical field [0001] The invention relates to the field of indoor leak plugging in the oil and natural gas industry, in particular to a dynamic leak plugging instrument and a dynamic leak plugging method using the dynamic leak plugging instrument. Background technique [0002] At present, to simulate the leakage of bottom hole mud or cement slurry, under a certain temperature and pressure difference, mesh plates or fixed-width fractures are used to simulate the fluid leakage; however, when there are fractures in the actual formation, it will follow the fluctuations in the well. There is a situation of "opening and closing" in the pressure, and there is a dynamic leakage in which the cracks repeatedly "huff and puff" the fluid, and the dynamic leakage puts forward higher requirements for the plugging materials. Strengthening the simulation of "one piece and one combination" of fractures can more truly reflect the dynamic process of leakage so as to effectively evaluate and ...
Claims
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IPC IPC(8): E21B33/13
Inventor 谢玉洪罗宇维朱江林黄凯文王玉田张超徐一龙许前富吕维军赵琥
Owner CHINA NAT OFFSHORE OIL CORP