Patent ID: 8528395

Claim:
A method for monitoring the pressure in a well, the method comprising: connecting a pump to a production tubing within the well such that the pump pumps well effluents from an inflow region of the well into the production tubing; providing the production tubing with a side pocket which comprises an opening that provides fluid communication between the interior of the side pocket and an annular space surrounding the production tubing, which space is in fluid communication with the inflow region of the well; inserting a pressure sensor assembly having a housing into the side pocket such that the opening is located between a pair of annular seals that are mounted on the housing of the pressure sensor assembly; and monitoring the pressure difference across the pump by inducing the pressure sensor assembly to measure a pressure difference between a section of the side pocket which is fluid communication with the interior of the production tubing and a section of the interior of the side pocket which is located between the annular seals; wherein the pressure sensor assembly comprises: a first pressure sensor which measures the fluid pressure in the section of the side pocket which is connected in fluid communication with the interior of the production tubing; a second pressure sensor which measures the fluid pressure in the section of the interior of the side pocket which is located between the annular seals; and means for monitoring the difference of the fluid pressures measured by the first and second pressure sensor and for transmitting the measured pressures or pressure difference to a data transmission or data storage unit.