Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement

An oil well ultra-fine cement and high-permeability technology, which is applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problems of difficult control of water shutoff effect, low construction success rate, poor water shutoff effect, etc. , to achieve the effect of short construction period, low construction cost and good plugging effect

Inactive Publication Date: 2005-01-12
LIAOHE GASOLINEEUM EXPLORATION BUREAU
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Problems solved by technology

At present, two superfine cement water plugging construction techniques are usually used on site. One is to put cement plugs in the well first, and then inject ultrafine cement slurry. This technology has disadvantages such as high cost, c

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  • Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement
  • Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement

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Embodiment Construction

[0012] The utility model is provided by the following embodiments, which will be described below in conjunction with the accompanying drawings.

[0013] As shown in the figure, the pipe string of the water plugging construction process of the present invention is composed of upper and lower K341 hydraulic expansion packers 1, 3, a restrictor 2 arranged between them and a ball seat 4 at the lower end. Among them, K341 packers 1 and 3 (see figure 2 ) consists of an upper joint 5, an unblocking pin 6, a sealing rubber ring 7, a backwash check valve 8, a rubber cylinder gland 9, a rubber cylinder 10, a liquid cylinder 11, a piston 12, a lower joint 13 and a center pipe 14, and the center The upper and lower ends of the pipe 14 are respectively connected with the upper joint 5 and the lower joint 13 by threads; the outer middle part of the central pipe 14 is equipped with a rubber cartridge 10, and the upper and lower ends thereof are respectively provided with a rubber cartridge ...

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Abstract

This is a sealing technology used to seal the high permeation water layer during the oil well recover procession. This technology use pipe-stake it is composed with the double hydraulic expanding separator and throttle. It use the separator seal the water layer to separate the oil-layer and water-layer. The super tiny cement powder is squeezed out of throttle into the underground, then close the oil well. To spread the pressure: During the cement slurry solidified time interval. Washing the well, wash out the surplus cement slurry to the oil well, hoist the pipe stake to safety segment and close the well, to wait for the cement slurry solidify.

Description

Technical field: [0001] The invention relates to a technique for plugging a high-permeability water-out layer during oil well exploitation. Background technique: [0002] In the process of oil field development and oil well production, plugging the high permeability water layer is an important technological measure to maintain the stable production of oil wells and improve the production effect. At present, two superfine cement water plugging construction techniques are usually used on site. One is to put cement plugs in the well first, and then inject ultrafine cement slurry. This technology has disadvantages such as high cost, cumbersome process, and poor water plugging effect; the other The second is to use double compression packers for cement extrusion construction. This technology has a low construction success rate and the water blocking effect is not easy to control. Invention content: [0003] The purpose of the present invention is to provide a plugging technolo...

Claims

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Application Information

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IPC IPC(8): E21B33/10E21B33/12E21B33/13
Inventor 戴长生孟庆学李强洪希志王丽军段学强冯少海
Owner LIAOHE GASOLINEEUM EXPLORATION BUREAU
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