System for communicating downhole information through a wellbore to a surface location
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
UP-0460180
(2006-07-26)
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등록번호 |
US-7646310
(2010-02-22)
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발명자
/ 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
3 인용 특허 :
2 |
초록
▼
A pressure release encoding system for communicating downhole information through a wellbore to a surface location has a valve for providing a fluid restriction to fluid passing in the wellbore, a sensor positioned in the wellbore for sensing a downhole condition in the wellbore, an actuator coopera
A pressure release encoding system for communicating downhole information through a wellbore to a surface location has a valve for providing a fluid restriction to fluid passing in the wellbore, a sensor positioned in the wellbore for sensing a downhole condition in the wellbore, an actuator cooperative with the valve for moving the valve between at least two positions in timed relation to the downhole condition sensed by the sensor, and a detector positioned at the surface location for providing a measurement value at the surface location correlative to the time between the changes of the pressure of the fluid in the wellbore. The sensor is an inclination sensor for sensing an angle of inclination of a drill bit in the wellbore.
대표청구항
▼
I claim: 1. A system for communicating downhole information through a wellbore to a surface location comprising: a drill bit; a drilling sub; a BHA interconnected between the drill string and the drilling sub; a valve means for providing a flow restriction to fluid passing through the wellbore, sai
I claim: 1. A system for communicating downhole information through a wellbore to a surface location comprising: a drill bit; a drilling sub; a BHA interconnected between the drill string and the drilling sub; a valve means for providing a flow restriction to fluid passing through the wellbore, said valve means comprising a float valve mounted in said drilling sub suitable for controlling a flow of drilling mud in said wellbore; a sensor means positioned in the wellbore for sensing a downhole condition in the wellbore; an actuator means cooperative with the valve means for moving said valve means between at least two positions in timed relation to the downhole condition sensed by the sensor means; and a detector means positioned at the surface location and cooperative with the fluid passing in the wellbore for providing a measurement value at the surface location correlative to time between changes of pressure of the fluid in the wellbore, said valve means and actuator means being positioned within said drilling sub. 2. The system of claim 1, said sensor means being an inclination sensor means, the inclination sensor means for sensing an angle of inclination of said drill bit. 3. The system of claim 1, said float valve comprising: a housing positioned in said drilling sub; a piston slidably movable in said housing; and a piston stem connected to said piston and extending outwardly of said housing, said actuator means acting on said piston stem so as to move said piston in said housing in timed relation between two positions. 4. The system of claim 3, said actuator means comprising: an actuator piston movable between a first position and a second position, said actuator piston bearing on said piston of said float valve so as to impede an axial advancement of said piston stem. 5. The system of claim 1, further comprising: a pumping means positioned at the surface location for pumping drilling mud into the wellbore, said detector means sensing a change of pressure of the drilling mud. 6. The system of claim 1, said detector means comprising: a logic means for correlating a sensed time between changes in pressure to the downhole condition; and a display means for providing a generally realtime humanly perceivable indication of the downhole condition. 7. The system of claim 6, said sensor means being an inclination sensor means for sensing an angle of inclination of the drill bit, said angle of inclination of the drill bit being said downhole condition, said logic means for correlating said sensed time with said angle of inclination. 8. A method of communicating within a wellbore, the wellbore having a drilling mud circulation system therein, the circulation system being through a drill string, and a drilling sub affixed to said drill string, the method comprising: positioning a float valve in a fluid passageway of said drilling sub; forming a flow restriction within the circulation system, said flow restriction being said float valve; applying a quantified pressure of drilling mud in the circulation system against said flow restriction; sensing a quantifiable downhole condition; releasing a first percentage of pressure within said flow restriction at a first time; releasing a second percentage of pressure within said flow restriction at a second time, a time between said first time and said second time being correlative to the downhole condition; and determining the downhole condition at a surface location by sensing the time between said first time and said second time. 9. The method of claim 8, said step of sensing comprising: sensing an angle of inclination of a drill bit within the wellbore, said downhole condition being the angle of inclination. 10. The method of claim 8, further comprising: positioning an actuator in said drilling sub such that an actuator piston of said actuator cooperates with said float valve; and moving said actuator piston between a first position and a second position so as to cause said float valve to release said first percentage and said second percentage. 11. The method of claim 10, said step of determining comprising: measuring a time between release of said first percentage and release of said second percentage; and correlating said time to the downhole condition. 12. The method of claim 11, a drill bit being interconnected to an end of said drilling sub, said step of sensing comprising sensing an angle of inclination of the drill bit, the method further comprising: assigning a time value to a sensed angle of inclination; and moving said actuator piston between said first position and said second position at a time equal to said time value. 13. A system for communicating an angle of inclination of a drill bit during a downhole drilling operation to a surface location comprising: a drill string extending in a wellbore; a drilling sub connected to said drill string in said wellbore, the drill bit being interconnected to said drill string, the drilling sub having a fluid passageway therein; a valve means positioned in said drilling sub for providing a flow restriction in said fluid passageway; an actuator means cooperative with said valve means and positioned within said drilling sub, said valve means comprising a float valve mounted in said drilling sub suitable for controlling a flow fluid in said wellbore, said actuator means for moving said float valve between at least two positions; an inclination sensor means positioned in said drilling sub, said inclination sensor means for determining inclination of the drill bit, said inclination sensor means connected to said actuator means, said actuator means for acting on said valve means so as to release a first percentage of a fluid pressure through said flow restriction and a second percentage of the fluid pressure through said flow restriction in timed relation, the timed relation being correlated to the inclination of the drill bit; and a detection means positioned at the surface location for detecting change of fluid pressure and the timed relation therebetween so as to provide an indication of the drill bit. 14. The system of claim 13, said float valve comprising: a housing positioned in said drilling sub; a piston slidably movable in said housing; and a piston stem connected to said piston and extending outwardly of said housing, said actuator means acting on said piston stem so as to move said piston in said housing in timed relation between the two positions. 15. The system of claim 14, said actuator means comprising: an actuator piston movable between a first position and a second position, said actuator piston bearing on said piston stem opposite said piston of said float valve so as to impede an axial movement of said piston stem.
이 특허에 인용된 특허 (2)
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Hahn, Detlef; Peters, Volker; Rouatbi, Cedric, Hydraulically balanced reciprocating pulser valve for mud pulse telemetry.
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Turner, William Evans; Biglin, Jr., Denis P., Method and apparatus for transmitting information to the surface from a drill string down hole in a well.
이 특허를 인용한 특허 (3)
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Joseph, Paul, Actuator for downhole tools.
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Logan, Aaron W.; Logan, Justin C., Mud hammer.
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Forstner, Ingo; Schoenborn, Kai; Roders, Ingo, Real time untorquing and over-torquing of drill string connections.
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