Reverse sealed eccentric water distributor
An eccentric water distribution and reverse technology, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of reverse sealing, etc., and achieve the effect of convenient on-site application and good process inheritance
Active Publication Date: 2015-10-28
大庆康盛石油节能科技开发有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide an eccentric water distributor with a reverse sealing function to solve the reverse sealing problem of the eccentric water distributor of the layered water injection well in the oil field. And the seal inspection of the layered water injection string, which provides technical support for the oilfield to further improve the effect of layered water injection
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[0015] see Figure 1 to Figure 5 , an eccentric water distributor with a reverse sealing function in the present invention, comprising an upper joint 1, an upper connecting sleeve 2, a centralizing body 3, a main body 4, a guide body 5, a lower connecting sleeve 9 and a lower joint 6, the upper joint 1 and The upper connecting sleeve 2 is screwed, the lower end of the centralizer 3 is connected with the main body 4 by screws and then inserted into the upper connecting sleeve 2, the upper end of the main body 4 is screwed with the upper connecting sleeve 2, the lower end of the main body 4 is connected with the guide body 5 by screws and then inserted In the lower joint 6 , the lower end of the main body 4 is threadedly connected with the lower joint 6 through the lower connecting sleeve 9 ; the main body 4 is provided with a first axial offset hole 86 and a second axial offset hole 87 along the circumference. The above is the structure of the existing eccentric water distribut...
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A reverse seal type eccentric water distributor is characterized in that an upper connector is connected with an upper connecting sleeve in a threaded manner, the lower end of a centralizing body is connected with a body through screws and placed into the upper connecting sleeve, the upper end of the body is connected with the upper connecting sleeve in a threaded manner, the lower end of the body is connected with a guide body through screws and placed into a lower connector, the lower end of the body is connected with the lower connector in a threaded manner through a lower connecting sleeve, a first eccentric hole and a second eccentric hole are axially formed along the periphery of body, a downhole fluid reverse seal mechanism is mounted on the body, and a slide valve type pressure measuring mechanism is mounted in the second eccentric hole. The reverse seal type eccentric water distributor has the advantages that when a water injection well is shut down or stops injection, the reverse seal mechanism operates to stop liquid of high-pressure layers from flow backwards to the low-pressure layers, pressure measuring and layered water injection string seal examining after reverse seal can be achieved by the slide valve type pressure measuring mechanism, well washing fluid distribution, causing unthorough well washing, of on the water distributor during reverse well washing is avoided, and the reverse seal type eccentric water distributor is good in process succession and convenient in field application.
Description
technical field [0001] The invention relates to a layered water injection tool for an oil recovery process in an oil field, in particular to an eccentric water distributor with a reverse sealing function. Background technique [0002] At present, water flooding is still the main displacement technology used in oilfields, and layered water injection is one of the important means in the process of oilfield development. At present, many oilfields adopt the eccentric layered water injection process, and the existing eccentric water distributors do not have the function of reverse sealing. Formation sand and dirt are carried into the tubing, affecting the effect of layered water injection. When the water injection well needs to be flushed, the flushing fluid will enter the oil pipe on the eccentric water distributor, resulting in the midway diversion of the flushing fluid, resulting in the problem of incomplete well flushing. [0003] In addition, there is no reverse sealing pr...
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IPC IPC(8): E21B43/20
Inventor 康庆刚
Owner 大庆康盛石油节能科技开发有限公司