Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Patent
1987-10-07
1989-05-09
Neuder, William P.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
166250, 324323, 340855, E21B 4900, G01V 318, G01V 140
Patent
active
048280518
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 disclose subject matter which is common to the present patent application:
Telemetry System Using an Antenna, U.S. Ser. No. 700,352; filed Feb. 11, 1985; and Method and Means for Obtaining Data Representing a Parameter of Fluid Flowing Through a Down Hole Side of an Oil or U.S. Ser. No. 918,252; and Method and Apparatus for Data Transmission in a Well Bore Containing a Conductive Fluid, U.S. Ser. No. 934,610 both filed on even date herewith and claiming priority of said U.S. Ser. No. 700,352.
FIELD OF THE INVENTION
This invention relates to methods and apparatus for communicating data from the bottom to the top of a 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 reliably 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, to a geological formation located at the down hole location from a top portion of the well bore.
An embodiment of the present invention is a method for recovering data up hole at the top of a well bore while passing fracturing fluid down hole to a geological formation through a zone, having up hole and down hole extremities, in the well bore. Briefly the steps are as follows:
A parameter sensor and a transmitter of data signals are positioned at a location in the well bore which is substantially down hole from the zones down hole extremity. The data signals represent a parameter sensed by the sensor. A flexible line, preferably a wire line is lowered in the well that has, suspended therefrom, a receiver which is separate from the sensor and transmitter and a stiffener positioned up hole from the down hole extremity of the receiver with at least one insulated conductor passed up to the top of the well bore through the stiffener and the line. The step of lowering also includes the step of lowering the line until the receiver is in proximity to the transmitter and at least a portion of the stiffener extends substantially from the up hole extremity to the down hole extremity in front of the zone.
Preferably, the step of lowering includes the step of attaching to a lower end of the line, as the stiffener, a substantially
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Titchener Paul F.
Walsh Michael J. M.
Comdisco Resources, Inc.
Neuder William P.
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