Sub-drill exclusively represents two industry leading and world renowned US based oilfield equipment manufacturers; Global Manufacturing and Drillmax.


Global Manufacturing

Global Manufacturing specialise in the design and manufacture of a complete range of Drill Stem Valves, developed and engineered using FEA to be the highest quality and most reliable valve on the market.

Precision machined from the highest quality materials, Global Valves are competitively priced and reliable - designed to last the pace offshore in all types of well and operating conditions, including 20k designs for the next generation of drilling.

Sub-drill are the authorized distributor and OEM approved repair centre for Global Manufacturing products in Europe and Africa.



Based in Houston, Texas, Drillmax is the world's leading independent manufacturer of Drill Pipe Float Valves and Solids Control Products.

Dating back to 1984, this family owned and operated company continues to focus on improving Float Valve Technology to produce a superior valve with a longer service life. Drillmax Inc successfully manufacture the finest float valves available on the market.

Sub-drill maintain an inventory of Drillmax float valves and spare parts in our UK facility, and provide supply, repair and pressure testing services in combination with our own range of float sub product where required.

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global manufacturing drill stem valves

Sub-drill drill stem valves

drill stem valve manufacture


Additional reading: Drill Stem Valve Services.