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Crown to Ground Supply, Inc.

Drill String Accessories

SUBS

All our subs are manufactured here in the USA from 4140HT and 4145M alloy steel and they are API certified.
We provide the following subs:
Saver Subs
Crossover Subs
Bit Subs
Bottleneck Subs
Straight Subs
Lift Subs
Side Entry Subs

IBOPS AND KELLY VALVES
USA made with 4140/4145 alloy steel. We can trim them for either standard or H2S. Certs will provided. We offer them in 5,000 psi, 10,000 psi, and 15,000 psi.

THREAD PROTECTORS
We offer both plastic and pressed steel thread protectors for drill pipe, collars, kellys, subs, and casing. We offer them with the following threads: NC, HT, XT, IF, REG, FH, PAC, H90, Left-Hand, Mayhew, XTM, HTPAC, AOH, and SLH90.

CAST THREAD PROTECTORS (LIFTING NUB)
We offer cast steel lifting bails in both box and pin. We offer a range in size from 2-3/8” up to 8-5/8”