Downhole Applications

Commonly used to provide accurate control & measurements during directional drilling, the use of Measured While Drilling “MWD” tools provides real-time information about the conditions at the drill bit.  Due to drilling depth, it is not practical to power MWD tools from the surface, therefore batteries tailored to operate in high temperatures ( up to 225 °C) and vibration / shock loads must be deployed.  Due to their superior energy density (increased run time) lithium non-rechargeable batteries have become the industry standard over the last 30 years.

Recommended Chemistry

  • Lithium Thionyl Chloride (Li-SOCl2)– With its stable operating voltage (3.67V OCV), high energy/power capability and wide operating temperature capability (-55°C to 225°C), Li-SOCl2 has been the chemistry of choice for the oil/gas industry for the past 30 years. Engineered Power manufactures the Li-SOCl2 chemistry for MWD applications in a variety of cell sizes and power/temperature capabilities:
  • Due to drilling depth, it is not practical to power MWD tools from the surface, therefore batteries tailored to operate in high temperatures (up to 225°C) and vibration/shock loads must be deployed. Due to their superior energy density (increased run time), lithium non-rechargeable batteries have become the industry standard over the last 30 years.

Lithium Carbon MonoFlouride (Li-CFx) was developed in the 1970’s and has been utilized in numerous consumer and aerospace/defense applications. With its high temperature stability & energy density, long life and enhanced safety, Engineered Power has tailored the Li-CFx chemistry for MWD applications. However with a lower operating voltage (3.2V OCV) than LiSOClO2, Engineered Power works with our customers to analyze battery voltage and envelope constraints.

Currently Engineered Power offers the following cells with the Li-CFx chemistry: