Measuring and testing – Borehole or drilling – Downhole test
Patent
1986-10-09
1988-08-16
Myracle, Jerry W.
Measuring and testing
Borehole or drilling
Downhole test
367 83, E21B 4706
Patent
active
047635207
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCES
The patent applications whose titles, serial numbers and filing dates are noted below have the same inventors as the present patent application and disclosure subject matter which is common to the present patent application: Telemetry System Using an Antenna, U.S. Ser. No. 700,352, now abandoned filed Feb. 11, 1985, priority of which is claimed herein; Method and Apparatus for Data Transmission in a Well Bore Containing a Conductive Fluid, filed Oct. 9, 1986, under Ser. No. 934,610 and claiming priority of said U.S. Ser. No. 700,352 now abandoned; and Method and Apparatus for Data Transmission in a Well Using a Flexible Line with Stiffener, filed Oct. 7, 1987, under Ser. No. 109,306.
FIELD OF THE INVENTION
This invention relates to method and apparatus for communicating data from a down hole location in a well while fluid is flowing between the down hole location and a top portion of the well.
BACKGROUND OF THE INVENTION
Oil and gas wells are known having a well bore for passing fluid, transversely across a side of the well bore at a down hole location of the well bore and longitudinally in the well bore, between a geological formation located at the down hole location and a top portion of the well bore. The pressure of the fluid flowing across the side of the well is an important parameter to know by operators at the top of the well. Other parameters of the fluid as it flows across the side of the well may also be important to know at the top of the well. For example, during fracturing, when fluid is passed into the geological formation, pressure at the down hole location is important in determining whether a fracture is vertical or horizontal and to determine growth parameters of the fracture. Fluid pressure and temperature at the down hole location of a producing well, where fluid is flowing from the geological formation to the top of the well, may also be important in some situations. However, remoteness of the down hole location from the top of the well, high flow rates of the fracture fluid across the side of the well and the harsh environment down hole create difficulties in reliability recovering data representing the pressure and other parameters from the fluid at the down hole location.
Therefore, a need exists for easy to use apparatus and methods for recovery, at the top of a well bore, data which accurately and reliably represents a parameter, particularly pressure, of a fluid and particularly a fracture fluid, as that parameter exists in the fluid flowing through the side of the well at the down hole location.
SUMMARY OF THE INVENTION
Briefly, method and apparatus is disclosed herein for recovery of data in an oil or gas well having a well bore for passing fluid, transversely across a side of the well bore at a down hole location of the well bore and longitudinally in the well bore, between a geological formation located at the down hole location and a top portion of the well bore.
Briefly, the method involves sensing with a sensor, substantially at the down hole location, a parameter of the fluid. A transmitter transmits into the well bore, data signals which represent the sensed parameter. A receiver and a flexible line are lowered in the well bore, separate from the sensor and transmitter, while the receiver is suspended from the flexible line. The data signals are received with the receiver. Data signals, which represent the parameter, which is represented by the received data signals, are passed over the flexible line to the top portion of the well bore.
Preferably, the transmitter transmits the data signals substantially from the down hole location.
In one embodiment a string of annular members are positioned in the well bore for passing the fluid between the top portion and a lower portion of the well bore. The receiver and flexible line are lowered in an annulus left between the string of members and the well bore. In such an arrangement the sensor, preferably, senses the parameter of the fluid in the central passage of the string of members. In one arrangem
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Oil & Gas Journal, Feb. 21, 1983, pp. 84-90.
Titchener Paul F.
Walsh Michael J. M.
Comdisco Resources, Inc.
Myracle Jerry W.
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