Saudi Arabian Oil Company

Wireless Instrumentation Systems As

Widril As

Vegard Fiksdal

Jarl André Fellinghaug

Abubaker Saeed

Anton Kulyakhtin

Muhammad Arsalan

Henrik Wanvik Clayborough

Stian Marius Hansen

Alexey Prusakov

Disclosed are perturbation signaling systems and methods for use in a downhole well. Such systems can include a downhole tool configured to hang from a wellbore anchoring mechanism. The tool can have or associate with an energy harvesting system, a power management system, a sensing system, and a wireless communication system. A turbine generator can encode signals into flowing fluid through electric load and related changes in hydraulic energy, transmitting information through the fluid. A receiver station positioned at another well location can decode and or relay the signals. Signals can bypass impediments such as noise zones by inducing signals in adjacent parallel well environments such as an annulus. The receiver station can accumulate energy from repeated redundant signaling over time to enhance communication and signal resolution. An additional wireless communication system can receive and/or relay data to a remote location.

Method and apparatus for wireless communication in wells using fluid flow perturbations

Downhole equipment and surface equipment communicate wirelessly with each other. A signal wirelessly transmitted at a first frequency from a downhole controller disposed within a wellbore is received at a surface location. The received signal is demodulated to a demodulated digital value. The demodulated value is added to an end of a buffer string. The buffer string is processed to determine whether the buffer string contains a message that is valid. In response to determining that the buffer string contains the message that is valid, the message is decoded. A command signal is wirelessly transmitted at a second frequency different from the first frequency to the downhole controller to adjust a state of the downhole controller.

Downhole wireless communication

A system includes a surface sub-system and a downhole sub-system. The surface subsystem includes a pump and a surface valve sub-assembly. The pump is configured to pump a fluid from a container, downhole into a wellbore. The surface valve sub-assembly is fluidically coupled to the pump and configured to receive a first portion of the fluid pumped by the pump. The surface valve sub-assembly includes a dump valve, a surface controller, and a return line. The surface controller is configured to adjust fluid flow through the dump valve, and the return line is configured to flow fluid from the dump valve to the container. The downhole sub-system includes a turbine-generator and a downhole controller coupled to the turbine-generator. The turbine-generator is configured to generate an output in response to receiving a second portion of the fluid pumped by the pump.

A zonal isolation assessment system includes a receiver, production tubing disposed in a wellbore, a zonal isolation assembly, and an assessment assembly. The zonal isolation assembly is fluidically coupled to the production tubing. The zonal isolation assembly includes isolation tubing that flows production fluid from the wellbore to the production tubing, a first sealing element, and a second sealing element to fluidically isolate an internal volume of the isolation tubing from an isolated annulus defined between the isolation tubing and the wall of the wellbore. The assessment assembly includes a first pressure sensor at the internal volume of the isolation tubing configured to sense a first pressure value and a second pressure sensor at the annulus and configured to sense a second pressure value. The assessment assembly transmits to the receiver the first pressure value and the second pressure value to determine the integrity of the zonal isolation assembly.

Growing community of inventors

Trondheim, Norway

Vegard Fiksdal