초록 ▼

A well screen assembly (70) with a controllable variable flow area. The well screen assembly (70) comprises an outer tubular section (80), the outer tubular section (80) containing a first plurality of openings (90) disposed in a pattern (100) throughout a length “L” of the outer tubular section (80

A well screen assembly (70) with a controllable variable flow area. The well screen assembly (70) comprises an outer tubular section (80), the outer tubular section (80) containing a first plurality of openings (90) disposed in a pattern (100) throughout a length “L” of the outer tubular section (80); an inner tubular section (110) that is disposed within the outer tubular section (80), the inner tubular section (110) containing a second plurality of openings (120) disposed in the same pattern (100) throughout a length L of the inner tubular section (110), and when the first plurality of openings (90) and second plurality of openings (120) align, the openings form a plurality of passageways (130) through the outer tubular section (80) and inner tubular section (110). The well screen assembly (70) may therefore, vary the flow of production fluid through it and upwards through the interior of a production tubing (40).

대표청구항 ▼

1. A well screen assembly with a controllable variable flow area, the well screen assembly comprising:an outer tubular section having a first plurality of openings disposed in a pattern throughout a length of said outer tubular section; an inner tubular section disposed within said outer tubular sec

1. A well screen assembly with a controllable variable flow area, the well screen assembly comprising:an outer tubular section having a first plurality of openings disposed in a pattern throughout a length of said outer tubular section; an inner tubular section disposed within said outer tubular section, said inner tubular section having a second plurality of openings disposed throughout a length of said inner tubular section so that said openings may align to form a plurality of passageways that vary in size from a maximum overall opening to a closed position depending on the amount of overlap between said first plurality of openings and second plurality of openings; an actuator operatively coupled to at least one tubular section; at least one transducer communicatively coupled to said actuator; and wherein said actuator imparts motion to said at least one tubular section to vary fluid flow through said passageways by moving said at least one tubular section to change the amount of overlap between said first plurality of openings and said second plurality of openings responsive to changes measured by said at least one transducer. 2. The well screen assembly of claim 1, wherein said at least one tubular section may be moved to a position wherein said second plurality of openings align with said first plurality of openings.3. The well screen assembly of claim 1, wherein said at least one tubular section may be moved to a position wherein said second plurality of openings partially align with said first plurality of openings.4. The well screen assembly of claim 1, wherein said at least one tubular section may be moved to a position wherein said second plurality of openings do not align with said first plurality of openings.5. The well screen assembly of claim 1, wherein said inner tubular section is linearly moveable within said outer tubular section.6. The well screen assembly of claim 1, wherein said inner tubular section is rotatable within said outer tubular section.7. The well screen assembly of claim 1, wherein said inner tubular section is helically moveable within said outer tubular section.8. The well screen assembly of claim 1, wherein said outer tubular section is linearly moveable without said inner tubular section.9. The well screen assembly of claim 1, wherein said outer tubular section is rotatable without said inner tubular section.10. The well screen assembly of claim 1, wherein said outer tubular section is helically moveable without said inner tubular section.11. The well screen assembly of claim 1, further comprising a screen jacket coupled to said outer tubular section.12. The well screen assembly of claim 11, wherein said screen jacket is a wire-wrapped jacket.13. The well screen assembly of claim 11, wherein said screen jacket is a dual-screen prepack screen jacket.14. The well screen assembly of claim 11, wherein said screen jacket comprises a sintered laminate filter media and a protective shroud.15. The well screen assembly of claim 1, wherein said at least one tubular section may be incrementally moved between a first position where said second plurality of openings do not align with said first plurality of openings and a final position where said second plurality of openings completely align with said first plurality of openings.16. The well screen assembly of claim 1, wherein said at least one tubular section may be moved with infinite adjustment between a first position where said second plurality of openings do not align with said first plurality of openings and a final position where said second plurality of openings align with said first plurality of openings.17. The well screen assembly of claim 1 further comprising:a third plurality of openings disposed throughout a length of at least one of said tubular sections, and each opening of said third plurality of openings forms a tortuous passageway. 18. The well screen assembly of claim 1, further comprising:a flow control device operatively coupled to said actuator and communicatively coupled to said at least one transducer; and wherein said at least one tubular section moves an amount proportional to changes measured by said at least one transducer. 19. The well screen assembly of claim 18, wherein said at least one transducer is a transducer selected from the group consisting of pressure transducer, temperature transducer, and flow rate transducer.20. A system for extracting production fluid from at least one production zone intersected by a wellbore, the system including at least one well screen assembly comprising:production tubing extending along a substantial length of the wellbore, the production tubing including at least one well screen assembly located proximate to each of said at least one production zone; said at least one well screen assembly comprising: an outer tubular section, said outer tubular section containing a first plurality of openings disposed in a pattern throughout a length of said outer tubular section; an inner tubular section that is disposed within said outer tubular section, said inner tubular section containing a second plurality of openings disposed in said pattern throughout a length of said inner tubular section; an actuator operatively coupled to at least one tubular section; at least one transducer communicatively coupled to said actuator; and wherein said actuator imparts motion to said at least one tubular section to vary fluid flow through said at least one well screen assembly by moving said at least one tubular section to change the amount of overlap between said first plurality of openings and said second plurality of openings responsive to changes measured by said at least one tranducer. 21. The system of claim 20, wherein said at least one well screen assembly may vary the flow of production fluid through it and upwards through the interior of said production tubing.22. The system of claim 20, wherein the well screen assembly may restrict flow from the production tubing back into the at least one productions zone.23. The system of claim 20 further comprising:a flow control device operatively coupled to said actuator and communicatively coupled to said at least one transducer; and wherein the production fluid screening system is able to vary its flow area by moving said at least one tubular section via said actuator by an amount proportional to control signals received from said flow control device, said control signals calculated at said flow control device from transducer signals transmitted by said at least one transducer. 24. The system of claim 23, where said inner tubular section is linearly moveable within said outer tubular section.25. The system of claim 23, where said inner tubular section is rotatable within said outer tubular section.26. The system of claim 23, where said inner tubular section is helically moveable within said outer tubular section.27. The system of claim 23, where said outer tubular section is linearly moveable without said inner tubular section.28. The system of claim 23, where said outer tubular section is rotatable without said inner tubular section.29. The system of claim 23, where said outer tubular section is helically moveable without said inner tubular section.30. The system of claim 23, where a third plurality of openings is disposed throughout a length of at least one of said tubular sections, and each opening of said third plurality of openings form a tortuous passageway.31. The system of claim 23, wherein said transducer is a temperature transducer.32. The system of claim 23, wherein said transducer is a pressure transducer.33. The system of claim 23, wherein said transducer is a flow rate transducer.34. A method for varying the flow area of a well screen assembly in a production fluid extraction operation having production tubing in a down-hole wellbore, the method comprising:measuring a condition of the production fluid by at least one transducer; converting the measured condition into an electrical signal by said least one transducer; transmitting said electrical signal to a flow control device by an umbilical; calculating an amount of movement based on said electrical signal by said flow control device; converting said amount of movement into a control signal by said flow control device; transmitting said control signal to an actuator by said umbilical; and moving, by said actuator, a first tubular section containing a plurality of openings disposed in a pattern relative to a second tubular section containing a plurality of openings disposed in said pattern, thereby varying the flow area of the well screen assembly for the transmission of production fluid upwards through the interior of the production tubing. 35. The method of claim 34, wherein said condition is temperature.36. The method of claim 34, wherein said condition is pressure.37. The method of claim 34, wherein said condition is flow rate.38. A method for varying the flow area of a well screen assembly in a production fluid extraction operation having production tubing in a down-hole wellbore, the method comprising:measuring a condition of the production fluid by at least one transducer; converting the measured condition into an electrical signal by said least one transducer; communicating said electrical signal to a down-hole wireless telemetry device; communicating said electrical signal from said down-hole wireless telemetry device to a surface wireless telemetry device; communicating said electrical signal from said surface wireless telemetry device to a computer; calculating, by the computer, an amount to move at least one tubular section; communicating, by the computer, said amount to said surface wireless telemetry device; communicating said amount from said surface wireless telemetry device to said down-hole wireless telemetry device; communicating said amount from said down-hole wireless telemetry device to an actuator; and moving, by said actuator, at least one tubular section according to said amount. 39. A method for varying the flow area of a well screen assembly in a production fluid extraction operation having production tubing in a down-hole wellbore, the method comprising:measuring a condition of the production fluid by at least one transducer; converting the measured condition into an electrical signal by said least one transducer; communicating said electrical signal to a down-hole wireless telemetry device; communicating said electrical signal from said down-hole wireless telemetry device to a surface wireless telemetry device; communicating said electrical signal from said surface wireless telemetry device to an operator, calculating, by said operator, an amount to move at least one tubular section; communicating said amount to said surface wireless telemetry device; communicating said amount from said surface wireless telemetry device to said down-hole wireless telemetry device; communicating said amount from said down-hole wireless telemetry device to an actuator; and moving, by said actuator, at least one tubular section according to said amount.