Related Oil & Gas Terms

• Wash over

  To release pipe that is stuck in the hole by running washover pipe. the washover pipe must have an outside diameter small enough to fit into the borehole but an inside diameter large enough to fit over the outside diameter of the stuck pipe. a rotary shoe, which cuts away the formation, mud, or whatever...

• Openhole

  The uncased portion of a well. all wells, at least when first drilled, have openhole sections that the well planner must contend with. prior to running casing, the well planner must consider how the drilled rock will react to drilling fluids, pressures and mechanical actions over time. the strength of the formation must also be...

• Wellbore

  A borehole; the hole drilled by the bit. a wellbore may have casing in it or it may be open (uncased); or part of it may be cased, and part of it may be open. also called a borehole or hole....

• Caliper log

  1. a record showing variations in wellbore diameter by depth, indicating undue enlargement due to caving in, washing, or other causes. the caliper log also reveals corrosion, scaling, or pitting inside tubular goods. 2. a representation of the measured diameter of a borehole along its depth. caliper logs are usually measured mechanically, with only a few...

• Cased hole

  1. a wellbore in which casing has been run. 2. the portion of the wellbore that has had metal casing placed and cemented to protect the openhole from fluids, pressures, wellbore stability problems or a combination of these. antonym: openhole....