Workstrings International

Global Headquarters

  • Workstrings International
  • 1150 Smede Hwy
  • Broussard, LA 70518
  • Phone: (337) 989-9675
  • Fax: (337) 492-0012
  • Toll Free: (888) 978-7464
  • Email:


Download the Workstrings International Pipe Specification App on the App Store℠ or Google Play™


There are several types of subs used within the industry which may vary by manufacturer, the most common being:

Bit Sub

The bit sub connects BHA components to the bit and is often bored for a float sub.

Crossover Sub

A short sub assembly is used to enable the connection of two components with differing thread types or sizes.

Float Sub

A float sub has a body which contains a one-way check valve to prevent drilling mud and cuttings flowing back up the drill string.

Lift Sub

The lift sub is a solid device useful for picking up slick components at the surface.