公开(公告)号：US20170145816A1

公开(公告)日：2017-05-25

申请号：US15355965

申请日：2016-11-18

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Miguel F. Pabon ,  Gaelle Jannin

IPC: E21B47/12 ,  E21B47/18 ,  H04B3/36

CPC classification number: E21B47/122 ,  E21B47/18 ,  H04B1/69 ,  H04B1/707 ,  H04B1/713 ,  H04B1/7136 ,  H04B3/36 ,  H04B2001/6908 ,  H04B2001/6912

Abstract: An information-carrying acoustic-pressure wave is generated in a wellbore using mud pulse telemetry. The information-carrying acoustic-pressure wave is converted, downhole, into an information-carrying electromagnetic wave and that wave is transmitted to the surface where it is received and the information extracted. A downhole repeater converts the acoustic-pressure wave and transmits the electromagnetic wave. The signal is received by an uphole/surface receiver. The repeater and/or the surface receiver may use an insulating gap. The electromagnetic signal is modeled as a leaky and noisy electronic circuit and the modeling results are used to select a spread spectrum transmission technique. The selected spread spectrum transmission technique is used to transmit the information-carrying electromagnetic signal at an increased rate of data transmission. The electronic noise and/or loss of signal energy are mitigated and a maximum transmission distance of the information-carrying electromagnetic signal is estimated using the modeling results.

公开(公告)号：US20170096890A1

公开(公告)日：2017-04-06

申请号：US14876693

申请日：2015-10-06

Applicant: Schlumberger Technology Corporation

Inventor： Arthur H. Hartog ,  Karim Boudah ,  Miguel F. Pabon

IPC: E21B47/022 ,  E21B43/24 ,  E21B7/06

CPC classification number: E21B47/02208 ,  E21B7/06 ,  E21B47/02216 ,  E21B47/123

Abstract: A system and methods for drilling a well in a field having an previously drilled well are provided. In accordance with one example, a method includes drilling a new well in a geological formation having an previously drilled well using a bottom hole assembly (BHA) having a transmitter. The method also includes transmitting a signal while drilling using the transmitter of the BHA. Further, the method includes measuring from the previously drilled well the signal from the transmitter received by at least one optical fiber disposed within the previously drilled well.