Self-flow-regulating parallel shunt
A diverter and self-adjusting technology, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of poor applicability, complex structure of adaptive inflow control device, etc., and achieve the purpose of offsetting reservoir heterogeneity Qualitative influence, inhibition of flow, effect of increased flow resistance
Inactive Publication Date: 2015-07-15
北京沃客石油工程技术研究院
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[0004] In order to solve the technical problem of complex structure and poor applicability of the self-adaptive inflow control device in the prior art
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[0020] The self-regulating flow type parallel shunt of the present invention will be further described in detail below in conjunction with the accompanying drawings. A self-regulating parallel flow divider, comprising a self-regulating nozzle 1, a parallel flow divider 2 and a flow restrictor 3; the self-regulating nozzle includes a fixed nozzle 11, a movable nozzle 12, a spring 13 and a nozzle jacket 14 , located at the front end of the parallel splitter 2, the fluid enters the parallel splitter 2 through the outlet 142 of the nozzle jacket;
[0021] The parallel flow divider 2 includes a flow-limiting pipeline 21 and a friction pipeline 22. The current-limiting pipeline 21 is a pipeline arranged alternately by expansion and contraction of the flow area, and the friction pipeline 22 is a pipeline arranged in a bend. The inlet 211 of the pipeline and the inlet 221 of the friction pipeline are all communicated with the outlet 142 of the nozzle jacket, the outlet 212 of the flow...
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The invention provides a self-flow-regulating parallel shunt which comprises a self-flow-regulating spray nozzle (1), a parallel shunt body (2) and a flow limiter (3), wherein an outlet of the self-flow-regulating spray nozzle (1) is sequentially connected with the parallel shunt body (2) and the flow limiter (3); the self-flow-regulating spray nozzle (1) can be automatically regulated according to the flow change; after fluid enters the parallel shunt body (2), a flow limiting pipeline (21) and a friction resisting pipeline (22) automatically recognize the fluids with different properties for shunting; when the fluids are oil phase, the fluids mainly flow into the flow limiting pipeline (21), enter the flow limiter (3) along the radial direction and then directly flow out of the outlet, at the moment, a flow channel is short in length and small in flowing resistance; when the fluids are aqueous phase, the fluids mainly flow into the friction resisting pipeline (22), enter the flow limiter (3) along the tangential direction, rotate for multiple times and then flow out of the outlet, and at the moment, the flow channel is long in length and large in flowing resistance. Therefore the self-flow-regulating parallel shunt has the advantage that quick entering of the aqueous phase can be inhibited, so that long-term stable production of an oil-gas well can be guaranteed.
Description
technical field [0001] The invention relates to a device for improving the effect of oilfield development, in particular to a self-regulating flow type parallel flow divider. Background technique [0002] In long horizontal wells, due to the "heel effect" and / or the influence of reservoir heterogeneity, the production of the well in some locations is much higher than that in others, and the resulting uneven production These locations see water / air prematurely. Once coning occurs, well production is significantly reduced due to restricted flow elsewhere. In order to eliminate this unbalanced phenomenon, commonly used methods include staged perforation, variable density perforation completion, central pipe completion, etc. However, these methods have limited ability to control the inflow profile, and it is difficult to ensure that the production profile is sufficiently uniform. [0003] In the early 1990s, Norsk Hydro (Norway Hydro) was the first to develop inflow control d...
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IPC IPC(8): E21B43/12E21B43/25
CPCE21B43/12E21B43/25
Inventor 不公告发明人
Owner 北京沃客石油工程技术研究院