公开(公告)号：US10444392B2

公开(公告)日：2019-10-15

申请号：US15311425

申请日：2015-05-15

Applicant: Silixa Ltd.

Inventor： Craig Milne ,  Brian Frankey ,  Tom Parker ,  Mahmoud Farhadiroushan

IPC: G01V1/00 ,  G01V1/46 ,  E21B47/022 ,  G01V1/44 ,  G01V11/00 ,  E21B47/09 ,  G01D5/14 ,  G01V1/22 ,  E21B43/116

Abstract: A downhole device is provided that is intended to be co-located with an optical fiber cable to be found, for example by being fixed together in the same clamp. The device has an accelerometer or other suitable orientation determining means that is able to determine its positional orientation, with respect to gravity. A vibrator or other sounder is provided, that outputs the positional orientation information as a suitable encoded and modulated acoustic signal. A fiber optic distributed acoustic sensor deployed in the vicinity of the downhole device detects the acoustic signal and transmits it back to the surface, where it is demodulated and decoded to obtain the positional orientation information. Given that the device is co-located with the optical fiber the position of the fiber can then be inferred. As explained above, detecting the fiber position is important during perforation operations, so that the fiber is not inadvertently damaged.

公开(公告)号：US20170082766A1

公开(公告)日：2017-03-23

申请号：US15311425

申请日：2015-05-15

Applicant: Silixa Ltd.

Inventor： Craig Milne ,  Brian Frankey ,  Tom Parker ,  Mahmoud Farhadiroushan

IPC: G01V1/46 ,  E21B47/09 ,  G01V1/22 ,  G01V11/00 ,  G01D5/14

CPC classification number: G01V1/46 ,  E21B43/116 ,  E21B47/02208 ,  E21B47/091 ,  G01D5/14 ,  G01V1/226 ,  G01V1/44 ,  G01V11/002

Abstract: A downhole device is provided that is intended to be co-located with an optical fiber cable to be found, for example by being fixed together in the same clamp. The device has an accelerometer or other suitable orientation determining means that is able to determine its positional orientation, with respect to gravity. A vibrator or other sounder is provided, that outputs the positional orientation information as a suitable encoded and modulated acoustic signal. A fiber optic distributed acoustic sensor deployed in the vicinity of the downhole device detects the acoustic signal and transmits it back to the surface, where it is demodulated and decoded to obtain the positional orientation information. Given that the device is co-located with the optical fiber the position of the fiber can then be inferred. As explained above, detecting the fiber position is important during perforation operations, so that the fiber is not inadvertently damaged.

公开(公告)号：US20240004096A1

公开(公告)日：2024-01-04

申请号：US18368758

申请日：2023-09-15

Applicant: Silixa Ltd.

Inventor： Craig Milne ,  Brian Frankey ,  Tom Parker ,  Mahmound Farhadiroushan

IPC: G01V1/46 ,  G01V11/00 ,  G01V1/44 ,  E21B47/095 ,  E21B47/0224 ,  G01D5/14 ,  G01V1/22

CPC classification number: G01V1/46 ,  G01V11/002 ,  G01V1/44 ,  E21B47/095 ,  E21B47/0224 ,  G01D5/14 ,  G01V1/226 ,  E21B43/116

Abstract: A downhole device is provided that is intended to be co-located with an optical fiber cable to be found, for example by being fixed together in the same clamp. The device has an accelerometer or other suitable orientation determining means that is able to determine its positional orientation, with respect to gravity. A vibrator or other sounder is provided, that outputs the positional orientation information as a suitable encoded and modulated acoustic signal. A fiber optic distributed acoustic sensor deployed in the vicinity of the downhole device detects the acoustic signal and transmits it back to the surface, where it is demodulated and decoded to obtain the positional orientation information. Given that the device is co-located with the optical fiber the position of the fiber can then be inferred. As explained above, detecting the fiber position is important during perforation operations, so that the fiber is not inadvertently damaged.

公开(公告)号：US11796703B2

公开(公告)日：2023-10-24

申请号：US16561631

申请日：2019-09-05

Applicant: Silixa Ltd.

Inventor： Craig Milne ,  Brian Frankey ,  Tom Parker ,  Mahmoud Farhadiroushan

IPC: G01V1/46 ,  G01V11/00 ,  G01V1/44 ,  E21B47/095 ,  E21B47/0224 ,  G01D5/14 ,  G01V1/22 ,  E21B43/116

CPC classification number: G01V1/46 ,  E21B47/0224 ,  E21B47/095 ,  G01D5/14 ,  G01V1/226 ,  G01V1/44 ,  G01V11/002 ,  E21B43/116

Abstract: A downhole device is provided that is intended to be co-located with an optical fiber cable to be found, for example by being fixed together in the same clamp. The device has an accelerometer or other suitable orientation determining means that is able to determine its positional orientation, with respect to gravity. A vibrator or other sounder is provided, that outputs the positional orientation information as a suitable encoded and modulated acoustic signal. A fiber optic distributed acoustic sensor deployed in the vicinity of the downhole device detects the acoustic signal and transmits it back to the surface, where it is demodulated and decoded to obtain the positional orientation information. Given that the device is co-located with the optical fiber the position of the fiber can then be inferred. As explained above, detecting the fiber position is important during perforation operations, so that the fiber is not inadvertently damaged.

公开(公告)号：US20190391291A1

公开(公告)日：2019-12-26

申请号：US16561631

申请日：2019-09-05

Applicant: Silixa Ltd.

Inventor： Craig Milne ,  Brian Frankey ,  Tom Parker ,  Mahmoud Farhadiroushan

IPC: G01V1/46 ,  G01V1/22 ,  E21B47/09 ,  G01D5/14 ,  G01V11/00

Abstract: A downhole device is provided that is intended to be co-located with an optical fiber cable to be found, for example by being fixed together in the same clamp. The device has an accelerometer or other suitable orientation determining means that is able to determine its positional orientation, with respect to gravity. A vibrator or other sounder is provided, that outputs the positional orientation information as a suitable encoded and modulated acoustic signal. A fiber optic distributed acoustic sensor deployed in the vicinity of the downhole device detects the acoustic signal and transmits it back to the surface, where it is demodulated and decoded to obtain the positional orientation information. Given that the device is co-located with the optical fiber the position of the fiber can then be inferred. As explained above, detecting the fiber position is important during perforation operations, so that the fiber is not inadvertently damaged.