Method and apparatus for use of electronic pressure gauge in extreme high temperature environment

A method of measuring pressure at a downhole location in a subterranean wellbore at high-temperatures, the method comprising the steps of:

• inserting into the wellbore a pressure gauge assembly having a pressure sensor and associated electronics for operating the pressure sensor;
• exposing the pressure sensor to a downhole wellbore pressure;
• exposing the pressure gauge assembly to a downhole temperature;
• flowing a pressurized fluid into a chamber proximate the pressure sensor;
• and
• cooling the pressure gauge assembly sufficiently to preclude damage from exposure to the downhole temperature;
• and
• expanding the pressurized fluid in the chamber.

A method of measuring pressure at a downhole location in a subterranean wellbore at high-temperatures, the method comprising the steps of:

• inserting into the wellbore a pressure gauge assembly having a pressure sensor and associated electronics for operating the pressure sensor;
• exposing the pressure sensor to a downhole wellbore pressure;
• exposing the pressure gauge assembly to a downhole temperature;
• flowing a pressurized fluid into a chamber proximate the pressure sensor;
• and
• cooling the pressure gauge assembly sufficiently to preclude damage from exposure to the downhole temperature;
• and
• flowing the pressurized fluid uphole.

A method of measuring pressure at a downhole location in a subterranean wellbore at high-temperatures, the method comprising the steps of:

• inserting into the wellbore a pressure gauge assembly having a pressure sensor and associated electronics for operating the pressure sensor;
• exposing the pressure sensor to a downhole wellbore pressure;
• exposing the pressure gauge assembly to a downhole temperature;
• flowing a pressurized fluid into a chamber proximate the pressure sensor;
• and
• cooling the pressure gauge assembly sufficiently to preclude damage from exposure to the downhole temperature;
• and
• wherein the step of flowing the pressurized fluid into the chamber proximate the pressure sensor further comprises the step of flowing the pressurized fluid downhole through a relatively small inner diameter tube.

A method of measuring pressure at a downhole location in a subterranean wellbore at high-temperatures, the method comprising the steps of:

• inserting into the wellbore a pressure gauge assembly having a pressure sensor and associated electronics for operating the pressure sensor;
• exposing the pressure sensor to a downhole wellbore pressure;
• exposing the pressure gauge assembly to a downhole temperature;
• flowing a pressurized fluid into a chamber proximate the pressure sensor;
• and
• cooling the pressure gauge assembly sufficiently to preclude damage from exposure to the downhole temperature;
• and
• pressurizing the fluid in the pressure gauge assembly prior to insertion into the wellbore.

A method of measuring downhole pressure in a wellbore extending through a subterranean formation, the method comprising the steps of:

• positioning an electronic pressure gauge assembly at an uphole location along the wellbore;
• positioning a pressure chamber at a downhole location along the wellbore;
• exposing the pressure chamber to a downhole temperature above the maximum operational temperature of the pressure gauge assembly;
• communicating the downhole wellbore pressure to the pressure chamber;
• communicating pressure in the pressure chamber to the pressure gauge assembly positioned uphole;
• and
• measuring the pressure communicated to the pressure gauge assembly using the pressure sensor;
• and
• communicating pressure from the pressure chamber to the pressure gauge assembly via a pressure conduit filled with a pressurized fluid.

A method of measuring downhole pressure in a wellbore extending through a subterranean formation, the method comprising the steps of:

• positioning an electronic pressure gauge assembly at an uphole location along the wellbore;
• positioning a pressure chamber at a downhole location along the wellbore;
• exposing the pressure chamber to a downhole temperature above the maximum operational temperature of the pressure gauge assembly;
• communicating the downhole wellbore pressure to the pressure chamber;
• communicating pressure in the pressure chamber to the pressure gauge assembly positioned uphole;
• and
• measuring the pressure communicated to the pressure gauge assembly using the pressure sensor;
• and
• wherein the step of communicating the downhole pressure to the pressure chamber further comprises actuating a temporary pressure isolation device.