DRILLING DAY Flashcards
A steel pipe cemented in place during the construction process to stabilize the wellbore called
Casing
The bottom of the casing string that helps guide the casing string past any ledges or obstructions that would prevent the string from being correctly located in the wellbore called
Casing Shoe
Any of a number of liquid and gaseous fluids and mixtures of fluids and solids (as solid suspensions, mixtures and emulsions of liquids, gases and solids) used in operations to drill boreholes into the earth called
Drilling Fluids
A large valve at the top of a well that may be closed if the drilling crew loses control of formation fluids called
Blowout Preventer (BOP)
A flow of formation fluids into the wellbore during drilling operations called
Well kick
A particularly crooked place in a wellbore where the trajectory of the wellbore in three-dimensional space changes rapidly called
Dogleg Severity
A secondary wellbore drilled away from the original hole. It might be drilled for a reasons (e.g. fish, junk in the hole, or a collapsed wellbore) called
Sidetrack
The lower portion of the drillstring, consisting of (from the bottom up in a vertical well) the bit, bit sub, a mud motor (in certain cases), stabilizers, drill collar, heavy-weight drillpipe, jarring devices (“jars”) and crossovers for various threadforms called
Bottomhole Assembly
The depth in a vertical hole at which a deviated hole is started called
Kickoff point (KOP)