초록 ▼

This relates to a pressure coring tool to obtain pressurized samples of the formation through which the wellbore is drilled. It includes a housing which supports a guide means along which the drill bit, core barrel and motor can be moved to extend or retract the cutting bit and core barrel along a s

This relates to a pressure coring tool to obtain pressurized samples of the formation through which the wellbore is drilled. It includes a housing which supports a guide means along which the drill bit, core barrel and motor can be moved to extend or retract the cutting bit and core barrel along a selected path which preferably is horizontal. The core barrel is retracted inwardly on a horizontal path and tilted in an upward position such as the outer end of the core barrel is higher than the end near the barrel. Means are provided to pressure seal the cut core within the core barrel.

대표청구항 ▼

A method of cutting a core from a sidewall of a borehole and retaining it in a pressured condition comprising: cutting a core from said sidewall by extending and rotating a core barrel having a core cutting head; retracting said core barrel from the sidewall; rotating said retracted core containing

A method of cutting a core from a sidewall of a borehole and retaining it in a pressured condition comprising: cutting a core from said sidewall by extending and rotating a core barrel having a core cutting head; retracting said core barrel from the sidewall; rotating said retracted core containing core barrel to a tilted position, and sealing said retracted tilted core barrel with said cut core therein.