دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a well drilled to confirm and evaluate the presence of hydrocarbons in a reservoir that has been found by a wildcat well.

additional wells drilled after a discovery, to confirm the size of a hydrocarbon deposit. Normally used to run buildup tests, drill stem tests, top and bottom of formation, gather core or fluid samples or other evaluations.

n: The automatic operation that lands the drill stem automatically through the device controlling bit pressure to make the bit pressure sustained during drilling.

n pi: a device, operated by air or hydraulic fluid, that fits into the opening in the rotary table when the drill stem must be suspended in the wellbore (as when a connection or trip is being made). Automatic slips, also called power slips, eliminate the need for roughnecks to set and take out slips manually. See slips.

n: A tool operated by pneumatics or hydraulic pressure.Used for chafing the drill stem when pipe connection or tripping.

n: A kind of explosive package used for breakouting pack of dynamic. It is sent by cable to first thread above the sticking point. Pull the drill stem and rotate left the

n: The operation that joins the driving stem to pick up drill stem and circulate the drilling fluid when touch sticking

n: a short cylindrical device installed in the drill stem between the bottom most drill collar and a downhole motor. Its purpose is to deflect the downhole motor off vertical to drill a directional hole. See drill stem.

a short section of a tool or pipe that is formed at an angle or is modified downhole by a motor to assist in entering deviated wellbores or drilling off the path of the wellbore.

n: a special device that fits into a bit breaker adapter (a plate that goes into the rotary table) and conforms to the shape of the bit. Rig workers place the bit to be made up or broken out of the drill stem into the bit breaker and lock the rotary table to hold the bit breaker and bit stationary so that they can tighten or loosen the bit.

a heavy plate that can hold the bit in the rotary table to make or break it from the drill string.

n: a heavy plate that fits into the rotary table and holds the bit breaker;a device used to hold the bit while it is being made up or broken out of the drill stem.

n: a device made up in the drill stem above the mill to collect bits of junk ground away during a milling operation. During milling, drilling mud under high pressure forces bits of junk up the narrow space between the boot sub and hole wall. When the junk reaches the wider annulus above the boot sub and pressure drops slightly, the junk falls into the boot sub. A boot sub also can be run above the bit during routine drilling to collect small pieces of junk that may damage the bit or interfere with its operation. Also called a junk sub or junk boot.

a device run in the drill string just above the mill to catch cuttings.

v: unscrewing the drill stem into single joints and placing them 00 the pipe rack. The operation takes place 00 completion of the well, or in changing from one size of pipe to another. See lay down pipe.

n: Put the singles which are unloaded from drill pipe stand on the pipe carrier.