Flow-regulating water-controlling sand-preventing well completion tubular column and sand filling method
A technology of completion string and sand control
Active Publication Date: 2021-01-26
PETROCHINA CO LTD
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[0035] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.
[0036] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those having ordinary skill in the art to which the present disclosure belongs. "First", "second", "third" and similar words used in the specification and claims of this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components . Likewise, words like "a" or "one" do not denote a limitation in quantity, but indicate that there is at least one. Words such as "comprises" or "comprising" and similar terms mean that the elements or items listed before "comprising" or "comprising" include the elements or items listed after "comprising" or "comprising" a...
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The invention provides a flow-regulating water-controlling sand-preventing well completion tubular column and a sand filling method. The flow-regulating water-controlling sand-preventing well completion tubular column comprises a sleeve assembly and a sand filling pipe assembly. The sleeve assembly comprises a movable sleeve, a sleeve body, a fixed sleeve and a filling sleeve; the sleeve body, thefixed sleeve and the filling sleeve are coaxially connected in sequence; the movable sleeve is coaxially and movably inserted into the fixed sleeve; the fixed sleeve and the movable sleeve are dynamically sealed; the sleeve wall of the fixed sleeve is provided with an overflowing channel; the movable sleeve shields the overflowing channel; the sand filling pipe assembly comprises an oil pipe body, an opening cylinder, and a filling pipe; the oil pipe body, the opening cylinder and the filling pipe are sequentially and coaxially connected; the opening cylinder is configured to open the openingcylinder when the sand filling pipe assembly is inserted into the sleeve assembly; and the movable sleeve is pushed to slide in the fixed sleeve, and the overflowing channel is exposed, so that the overflowing channel is communicated with a flowback annulus between the sleeve body and the oil pipe body. According to the flow-regulating water-controlling sand-preventing well completion tubular column and the sand filling method, the sand prevention effect can be guaranteed, the sand prevention validity period is prolonged, and the oil well yield is increased.
Description
technical field [0001] The disclosure relates to the technical field of oil and gas development, in particular to a well completion pipe string for regulating flow, controlling water and preventing sand, and a sand filling method. Background technique [0002] During the completion of unconsolidated sandstone reservoirs, if there is edge and bottom water near the reservoir, it may cause sand production and high water content in the oil well during the production period, resulting in short effective period of sand control, short effective period of production, low recovery rate and low bottom water. Coning and other issues. [0003] In related technologies, in order to prevent serious sand production in oil wells, screens are usually used to complete wells. That is, after the drilling is completed, a screen is run into the area corresponding to the target oil layer in the wellbore, and the screen is used to prevent sand from entering the wellbore and reduce the sand producti...
Claims
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Login to View More IPC IPC(8): E21B43/02E21B43/04E21B43/08
CPCE21B43/02E21B43/04E21B43/086
Inventor 刘言理周宝义张海军杨延征王晓轩袁照永李海伟孙景涛王晓梅刘庆玉靳盛
Owner PETROCHINA CO LTD