Coretrack claims its CLI technology will globally challenge the oil and gas sector's traditional core drilling techniques, as it improves the accuracy of taking core samples during drilling and development of oil and gas wells.

The CLI tool attached to the drillbit did not impede the coring process or well operations, according to Coretrack.

The CLI Core Log Report software provided detailed core run data and the CLI tool functioned as per its functional and technical specifications, the company said.

"A complete set of data was recovered from the recent field test," Coretrack said.

"Data, presented in the form of the CLI Core Log Report, provides

details of core recovery into the core barrel in a time versus distance travelled format."

The data in the attached chart shows that between zero hours and six hours the core barrel was being run into the well.

"The small movements in the graph during this period show that the recorder unit was moving slightly up and down in the barrel due to the movement of fluid through the core barrel as it was run in the hole on the drillstring," Coretrack said.

"At six hours the core barrel had reached the bottom of the well and coring commenced."

Between six hours and eight hours, a core sample was successfully cut and recovered into the core barrel.

"The timings on the CLI Core Log Report corresponded exactly with the onsite coring specialist's data, and a full 17 metres of core was recovered," Coretrack said.

"As with previous tests, the CLI Recorder Unit did not obstruct the coring process and both the CLI Recorder Unit canister and the electronics operated perfectly in the hostile well environment."

The company is now working on developing a core-barrel telemetry system that will enable the signal from the CLI Recorder Unit to be transmitted to the top of the core barrel assembly.