SU1214911A1 - Arrangement for operating water-flooded gas well - Google Patents

Description

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The invention relates to the gas industry, in particular, is intended to extract gas from a well, transporting produced water along with gas.

The purpose of the invention is to increase the efficiency of the operation of the device in case the absorbing formation is located above the gas-rich formation due to a decrease in the production water-cut.

The drawing schematically shows the proposed device a General view.

The device includes a wellhead (not shown) binding, a crown of elevator pipes 1, a packer 2, successively mounted on a crown of elevator pipes 1 above the packer 2 annular chambers 3 with side holes 4, a bottom 5 and a float 6, annulus 7, gas-saturated reservoir 8, reservoir 9j absorbing reservoir water reservoir 8. The lower annular chamber 3 is set at a height sufficient to create a pressure of the reservoir water column in the annulus 7 to enter it in the absorbing reservoir 9 at a clean bottom, and the upper annular chamber avlivaets rate of formation water absorption when the contaminated bottom absorbent layer 9. The lower annular chamber 3 allows remove from the gas stream produced water at a lower level, i.e. energy for the rise of reservoir water is spent less, and consequently, the equipment works with greater efficiency.

Upper annular chamber 3 allows to prolong the well operation with gradual contamination of the reservoir 9 (additional resistance is created when the formation water enters the absorbing reservoir, which in turn requires a large height of the water column in the annulus). At the same time, the lower the upper chamber chamber 3 is installed, the more often it is necessary to clean the face.

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absorbing reservoir 9 and vice versa. With less efficiency, the device works when installing one annular chamber 3, while the float 6 5 can not be installed. The installation height of the lower and upper annular chambers can be determined by calculations and adjusted during operation.

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The device works as follows.

The reservoir water together with the gas from the gas reservoir (enamel reservoir 8 enters

 in the lower annular chamber 3, where

it is partially separated from the gas due to a decrease in the rate of the outgoing flow and through the holes 4 enters the annulus 7, accumulating above the packer 2, which uncouples the gas; 8 and absorbs 9 layers. The lower annular chamber 3 is installed at a height on the basis of creating a pressure of a column of produced water, taking into account the pressure in the annulus 7, which is sufficient (with some reserve) to enter the produced water into the absorbing formation 9 with a clean bottom. As the reservoir 9 is clogged with 30, the level of formation water in the annulus 7 rises to the level of the float 6 of the lower annular chamber 3, which rises and separates the holes 4

35 and the annulus 7 at the same time fills the volume of chamber 3, thereby creating conditions for the upstream reservoir into the superior chamber. When a column of lift pipes is separated from the annulus by the float 6 of the upper annular chamber 3, the volume of produced water in the gas flow increases dramatically, which can be detected by a drop in pressure at the wellhead or by increasing the amount of produced water entering the surface, which serves as a signal for cleaning works

5Q reservoir 9, after which operation resumes,

Editor S. Lisin

Compiled by V. Boriskina

Tehred A. Babinets Proofreader E. Roshko

Order 892/46 Circulation 548 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Claims (1)

DEVICE FOR OPERATING A WATER-RELEASED GAS WELL, containing a column of elevator pipes and a packer, characterized in that, in order to increase its efficiency when the absorbing layer is located above a gas-saturated layer by reducing the water cut of the product, it is equipped with elevator pipes sequentially installed on the column above the packer annular chambers, in the cavity of each of which a float is installed, and the cavity of the chambers above the floats is in communication with the cavity of the column of elevator pipes and the annulus wells, and chamber cavities under the floats are in communication with the annulus of the well. ω s