Rotary Sidewall Coring Tool


Retrieves undamaged formation core samples for reliable, accurate, and detailed formation analysis


  • Lithology determination and analysis

  • Primary and secondary porosity analysis and determination

  • Permeability determination and analysis

  • Hydrocarbon confirmation

  • Fracture detection

  • Grain density and clay content determination

Features and Benefits

  • The rotary sidewall coring tool (RSCT) obtains undamaged formation core samples of the same quality as plugs obtained through conventional coring methods—and more economically than cutting full-diameter cores.

  • The RSCT obtains up to 25 cores at multiple depths in a single run.

  • The cores provide unaltered rock samples for detailed analysis of porosity, permeability, lithology, cementation, grain density, and clay type.

Tool Description

Unlike percussion core guns, which can damage cores, the Weatherford RSCT retrieves undamaged formation core samples for obtaining reliable porosity and permeability information. The RSCT uses a rotating diamond bit to cut 15/16-in. × 1 3/4-in. (24-mm × 44-mm) plugs out of the formation without damaging or altering the physical properties of the core.

Coring operations using the RSCT begin after logs are available and provide more accurate results in wildcat or missed core-point situations. Each coring run can yield up to 25 cores, with an average estimated cutting time of 5 minutes each, depending on the formation.

The RSCT is combined with gamma ray or spontaneous potential sensors for depth correlation.