High-temperature and high-pressure sealing system
A sealing system, high temperature and high pressure technology, applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve problems such as loss of seal, large proportion of high temperature and high pressure wells in oil fields, poor application effect, etc. To achieve the effect of strong resistance to two-way pressure difference and good temperature resistance
Pending Publication Date: 2021-12-10
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0002] At present, with the continuous development of oil and gas reservoirs, the gradual reduction of easy-to-recover oil and gas resources and the gradual increase in the global economy's demand for oil and gas resources, drilling activities are constantly moving to complex geological areas, deep water, extreme high-temperature and high-pressure and other high-risk and extremely challenging areas. With the shift of environment, the proportion of high-temperature and high-pressure wells in oil fields is also increasing. The well conditions of high-pressure and high-temperature wells are more complex, and the requirements for the performance of well completion sealing systems are also higher. The application effect of conventional sealing systems in high-temperature and high-pressure environments Poor, there is a risk of loss of seal under high temperature, high pressure and pressure alternating loads
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0018] Such as figure 1 The high-temperature and high-pressure sealing system includes a support back ring 1, an anti-drilling ring 2, an end rubber tube 3, a rubber tube spacer ring 4, a middle rubber tube 5 and a retaining ring 6, and the inner side of the middle rubber tube 5 is in the middle There is a retaining ring 6, the two ends of the middle rubber tube 5 are rubber tube spacer rings 4, the rubber tube spacer ring 4 is connected with an end rubber tube 3, and the end rubber tube 3 is connected with a supporting back ring 1, the An anti-drilling ring 2 is provided between the end rubber tube 3 and the support back ring 1, the aforementioned support back ring 1 is a bowl-shaped structure, and its outer end is provided with a threaded structure.
[0019] In the above technical solution, the anti-drill ring 2 has an isosceles triangle str...
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Abstract
The invention discloses a high-temperature and high-pressure sealing system which comprises supporting back rings, anti-drilling rings, end rubber barrels, rubber barrel distance rings, a middle rubber barrel and a bearing ring. The bearing ring is arranged in the middle of the inner side of the middle rubber barrel; the rubber barrel distance rings are arranged at the two ends of the middle rubber barrel; the rubber barrel distance rings are connected with the end rubber barrels; the end rubber barrels are connected with the supporting back rings; the anti-drilling rings are arranged between the end rubber barrels and the supporting back rings; each supporting back ring is of a bowl-shaped structure; and a threaded structure is arranged at the outer end of each supporting back ring. The high-temperature-resistant and high-pressure-resistant sealing system has high bidirectional pressure difference resistance under extremely severe well conditions such as high temperature and high pressure, and has good temperature resistance, pressure bearing performance and stability.
Description
technical field [0001] The invention belongs to the technical field of oil well drilling and production, and in particular relates to a high-temperature and high-pressure sealing system. Background technique [0002] At present, with the continuous development of oil and gas reservoirs, the gradual reduction of easy-to-recover oil and gas resources and the gradual increase in the global economy's demand for oil and gas resources, drilling activities are constantly moving to complex geological areas, deep water, extreme high-temperature and high-pressure and other high-risk and extremely challenging areas. With the shift of environment, the proportion of high-temperature and high-pressure wells in oil fields is also increasing. The well conditions of high-pressure and high-temperature wells are more complex, and the requirements for the performance of well completion sealing systems are also higher. The application effect of conventional sealing systems in high-temperature and...
Claims
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IPC IPC(8): E21B33/127
CPCE21B33/127E21B33/1277E21B2200/01
Inventor 曲玉强李雄邹刚周歆刘磊杨小城魏伟
Owner CHINA PETROLEUM & CHEM CORP