Apparatus for downhole water production control in an oil well

Patent metadata

Field	Value
Publication number	US-9404351-B2
Application number	US-201414196042-A
Country	US
Kind code	B2
Filing date	Mar 4, 2014
Priority date	Mar 4, 2013
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

This invention relates to controlling production fluids downhole in an oil well. More specifically, this invention relates to control of water and pressure downhole. Provided are apparatus for controlling production fluids and pressures and methods of using the apparatus to control production fluids and pressures.

First claim

That which is claimed is:

1. An apparatus capable of controlling pressure and production fluids in a circular pipe in a downhole region of a well bore, the apparatus comprising:
the circular pipe comprising at least one pipe orifice on a lower side of the circular pipe, the pipe orifice operable to allow the flow of production fluids through the orifice into the circular pipe;
an inclined wall within the circular pipe, the inclined wall having a plurality of flow control members positioned at different horizontal levels relative to the inclined wall;
the flow control members each having a housing with an inner chamber and a buoyant element within the inner chamber of the housing, such that the buoyant element moves vertically within the inner chamber relative to a density of the production fluids;
each housing having a lower housing orifice and an upper housing orifice;
and a space located between the pipe orifice and the inclined wall.

2. The apparatus of claim 1 , further wherein the buoyant elements have a density selected based on a density of water in the downhole region.

3. The apparatus of claim 1 , further wherein the buoyant elements have a density selected based on a density of oil in the downhole region.

4. The apparatus of claim 1 , wherein the buoyant elements are spherical.

5. The apparatus of claim 1 , wherein the housing is cylindrical.

6. The apparatus of claim 1 , wherein the flow control members are the same size.

7. The apparatus of claim 1 , wherein the flow control members are of varying sizes.

8. The apparatus of claim 1 , wherein the flow control members are located at horizontal levels along the inclined wall such that the apparatus is operable to optimize a control of water entering the circular pipe in the downhole region.

9. The apparatus of claim 1 , wherein the flow control members are capable of inducing an overall change in pressure such that the pressure of the well bore is adjusted in a downhole region of the apparatus.

10. The apparatus of claim 1 , wherein the inclined wall has three or more flow control members.

11. The apparatus of claim 10 , wherein the flow control members are at different horizontal levels.

12. The apparatus of claim 10 , wherein at least two flow control members are at the same horizontal level.

13. A process using the apparatus of claim 1 in a horizontal section of an oil well, the process comprising the steps of:
permitting production fluids to flow through the pipe orifice and enter the space;
allowing the production fluids to enter the inner chamber of the housing of a lowest positioned flow control member on the inclined wall, the production fluids contacting the buoyant element of the flow control member at the lowest horizontal level and urging the buoyant element into a position relative to the density of the production fluids;
the position ranging between the lower housing orifice and the upper housing orifice of the inner chamber of the housing such that the upper housing orifice is shut off from fluid communications when the buoyant element is urged to a highest position of the buoyant element within the inner chamber.

14. The process of claim 13 wherein the process further comprises the steps of:
the production fluids entering the lower housing orifice of a higher positioned flow control member on the inclined wall;
the production fluids contacting the buoyant element of the higher positioned flow control members;
the buoyant element moving upward and being operable to close the upper housing orifice of the higher positioned flow control members on the inclined wall.

15. The process of claim 13 wherein the process further comprises the steps of:
regulating an influx of water in the downhole region by closing the upper housing orifice of all housings of all flow control members positioned along the inclined wall.

16. The process of claim 13 wherein the process further comprises the step of:
adjusting the pressure in the downhole region.

17. The process of claim 13 wherein the process further comprises the step of:
adjusting the pressure in the downhole region.

18. The process of claim 13 wherein the process further comprises the step of:
optimizing production rates from a downhole region.

19. The process of claim 13 wherein the process further comprises the step of:
improving production quality from a downhole region.

Assignees

• Saudi Arabian Oil Co

Inventors

• Noui-Mehidi Mohamed Nabil

Classifications

• E21B43/12 Primary

  Methods or apparatus for controlling the flow of the obtained fluid to or in wells (E21B43/25 takes precedence; valve arrangements E21B34/00) · CPC title

• E21B43/086

  Screens with preformed openings, e.g. slotted liners (comprising porous materials E21B43/082) · CPC title

• E21B34/08

  responsive to flow or pressure of the fluid obtained (E21B34/10 takes precedence) · CPC title

• E21B43/32

  Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells · CPC title