Patent · US Active

Method and apparatus for continuously checking casing cement quality

US11525939B2 · kind B2 · utility

1Cited by

2References

18Claims

0Family size

Assignee

SAUDI ARABIAN OIL COMPANY · SA

Inventors

Ammar Alali · Cambridge, US
Husain Nassir · Safwa, SA
Ezzedeen Alfataeirge · Dhahran, SA

Key dates

Filing date	Jul 10, 2020
Grant date	Dec 13, 2022
Priority date	—
Expiry date	Nov 3, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01N33/383
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A system for monitoring downhole cement quality in a cased well includes an active acoustic source that generates acoustic waves, a distributed acoustic sensor, and a controller. The distributed acoustic sensor includes an optical fiber disposed on an outer surface of a casing of the cased well; a pulsed laser coupled to the optical fiber and that transmits pulses of laser light along the optical fiber; a sensor that detects light that is backscattered and reflected by the optical fiber; and a processor that controls the pulsed laser, receives signals from the sensor, and converts the signals into acoustic information. The controller receives the acoustic information from the processor and identifies well integrity loss.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.