Drilling Industry Glossary

cable tool CaCl₂ weight calcium, total hardness cap rock cased hole casing casing centralizer casing coupling (collar) casing hanger casing head casing point casing pressure casing shoe casing string casing wear cement cement additive cement bond cement bond survey cementing cementing pump chlorides chlorides whole mud choke choke line christmas tree circulate circulation sub close in coarse LCM coiled tubing collapse pressure complete a well completion completion fluid concentration condensate conductivity conductor pipe contract depth contractor core cratering critical rate critical velocity crooked hole crossover sub crude oil cuttings

Concentration

Concentration for cement or spacer additives. There are only 2 kinds of additives: liquid or solid.

1. Cement additives:

   For liquid, there are 2 units: (gps), (gphs)

   • (gps) - gallon per sack of cement
   • (gphs) - gallon per hundred sacks of cement

   For solid, there are 4 units: (% bwoc), (lb/sk), (lb/gal), (% bwow)

   • (% bwoc) - weight percent (by the weight of cement)
   • (lb/sk) - pound per sack of cement
   • (lb/gal) - pound per gallon of water in the mixture, not the cement slurry
   • (% bwow) - weight percent (by the weight of water)
2. Spacer additives:
   • For liquid, there is 1 unit: (gpb) - gallon per barrel
   • For solid, there is 1 unit: (ppb) - pound per barrel

You may also be interested in: