US 11,668,181 B2
Smart sensing drill bit for measuring the reservoir's parameters while drilling
Abeer Ateeq Alarawi, Al Khobar (SA); Masfer Alkahtani, Riyadh (SA); Abdullah Al Moajil, Eastern Region (SA); and Sajjad Al Darweesh, Safwa (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA); and KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY, Riyadh (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA); and KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY, Riyadh (SA)
Filed on Sep. 30, 2021, as Appl. No. 17/491,273.
Prior Publication US 2023/0099562 A1, Mar. 30, 2023
Int. Cl. E21B 47/002 (2012.01); E21B 47/013 (2012.01); E21B 47/00 (2012.01); E21B 47/135 (2012.01); E21B 47/07 (2012.01)
CPC E21B 47/002 (2020.05) [E21B 47/006 (2020.05); E21B 47/013 (2020.05); E21B 47/07 (2020.05); E21B 47/135 (2020.05)] 15 Claims
OG exemplary drawing
 
13. A method for performing a drilling operation of a subterranean formation, comprising:
disposing an optical sensor on a drill bit body of a drill bit, wherein the drill bit is coupled to a drill string that is suspended in a wellbore penetrating the subterranean formation, the optical sensor comprising a fiber bragg grating embedded in at least one optical fiber;
coupling the optical sensor to a surface logging station via the at least one optical fiber that is passed through a first channel in the drill bit body and a second channel in the drill string to couple to the surface logging station;
generating, by the optical sensor while drilling the subterranean formation using the drill bit, an environmental parameter measurement inside the wellbore;
eliminating any downhole light source for the at least one optical fiber;
preventing disruption induced by any downhole light source failure to generating the environmental parameter measurement using the optical sensor, wherein generating the environmental parameter measurement comprises:
generating, by the fiber bragg grating reflecting an excitation light beam, a reflected light beam,
wherein the excitation light beam is generated by a light source of the surface logging station and transmitted downhole via the at least one optical fiber; and
wherein the environmental parameter measurement is transmitted to the surface logging station via the reflected light beam travelling within the at least one optical fiber,
wherein the environmental parameter measurement corresponds to a central wavelength of a spectral range of the reflected light beam, and
wherein the central wavelength is influenced by one or more of a downhole temperature, a downhole pressure, and the downhole chemical composition;
transmitting, via the at least one optical fiber, the environmental parameter measurement to the surface logging station;
generating, by the surface logging station, an analysis result by analyzing the environmental parameter measurement; and
presenting the analysis result to a user to facilitate the drilling operation,
wherein the environmental parameter measurement represents at least a downhole chemical composition measured by the first fiber bragg grating.