دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

location of initial seismic signal.

n: the drilling of relatively small holes into the earth, the purpose of which is to provide a means for lowering an explosive shot in order to create shock waves for seismic analysis.

n: 1. the flat portion machined on the base of the bit shank that meets the shoulder of the drill collar and serves to form a pressure-tight seal between the bit and the drill collar. 2. the flat portion of the box end of the pin end of a tool joint;the two shoulders meet when the tool joint is connected and form a pressure-tight seal.

a surface on a downhole tool on which an upper tool or piece of equipment will stop.

n: a kinds of tool that skims the cut plane of joints and annular shoulder below thread root.

n: an anomaly on resistivity logs where a low resistance formation and ahigh resistance formation meet. The change in resistivitychannels the current causing characteristic horn-shaped signal responses in uncorrected logs. The effect can be corrected by to

set a seal stack all the way down so the locator shoulder on the stinger contacts the packer.

n: The tight touch on the end face of the box and pin to achieve wiper seal.