Pressure-Temperature Tool

General Description

The Pressure-Temperature (P-T) tool is a fundamental production-logging sensor deployed within PLT tool strings. It delivers continuous downhole pressure and temperature measurements under wellbore operating conditions. High-precision pressure and temperature sensors are housed inside a rugged pressure-tight metal housing. The tool records real-time downhole data during logging passes, and can operate in both real-time wireline mode and memory logging mode.

Downhole pressure data monitors reservoir pressure, hydrostatic pressure and flowing wellbore pressure. Temperature profiles reflect fluid inflow locations, fluid movement and thermal anomalies caused by injection, leakage or channeling. Combined with flowmeter and holdup sensor data, P-T measurements support well performance evaluation and reservoir dynamic analysis.

Working Principle

High-accuracy strain-gauge or quartz pressure transducer converts wellbore pressure into electrical signals. A high-resolution temperature sensor captures borehole fluid temperature. Electronic circuit modules process, digitise and transmit these signals uphole, or store data to on-board memory for post-job download. Continuous pressure-temperature traces are obtained while logging up and down the wellbore.

Key Features

◆ High-precision pressure and temperature monitoring for cased-hole production logging.

◆ Supports both real-time surface readout and memory-mode acquisition.

◆ Compact outer diameter for easy integration into multi-sensor PLT assemblies.

◆ Wide operating range, suitable for producers, injectors, horizontal and high-deviation wells.

◆ Detect reservoir pressure, flowing pressure, temperature anomalies, packer leakage and tubing failure.

Typical Applications

◆Record static and flowing borehole pressure for reservoir dynamic surveillance 

◆Acquire wellbore temperature profiles to identify inflow zones, leaks and channeling 

◆Monitor pressure drawdown and build-up during production and shut-in conditions 

◆Provide auxiliary data for production-profile and injection-profile interpretation 

◆Diagnose packer leakage, tubing leaks and downhole completion malfunction 

◆Cooperate with flowmeter, GR-CCL and holdup tools for comprehensive PLT interpretation

Typical Technical Specifications