Joint 03
Joint 03 :
(1) (n.) Geology. A surface of breakage, cracking or separation within a rock along which there has been no movement parallel to the defining plane. The usage by some authors can be more specific: When walls of a fracture have moved only normal to each other, the fracture is called a joint. See: Fault, Fracture. (2) (n.) Drilling. A length of pipe, usually referring to drillpipe, casing or tubing. While there are different standard lengths, the most common drillpipe joint length is around 30 ft [9 m]. For casing, the most common length of a joint is 40 ft [12 m]. See: Casing, Casing String, Connection, Drillpipe, Kelly Down, Make A Connection
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