API license 5CT-0024

About Us.

Lone Star Tubular Service, Inc. is a Lone Star, Texas; Oil Country Tubular Goods service company specializing in API threading, specialty machining, coupling service and hydrostatic testing. LSTSI operates under API license 5CT-0024, and is listed in the Composite List of Manufacturers as a Threader. Initial operations began in 1980 with portable testing and coupling installation. Current operations include a 150 acre service and storage facility to help meet the needs of our CUSTOMERS.

Specialty services include, but are not limited to Turn Down/Bevel for special clearance, Hydro Testing and related service, Thread Lock, Float Collar, and Guide Equipment. Also Clean, protect and spaying of O.D.

We can customize a well return & storage program to meet your company’s need.


Markers and pups can be customized to meet well requirements.

Close Nipples with specific threads to make connections

Close Nipples with specific threads to make connections

Andy Selman



Stephen Haney

Sales Manager


Tammie Gilmore

Office Manager


William Gilmore

Plant Manager


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