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.

“Drillmax is a premier manufacturer of drill pipe float valves, gate valves, and shear relief valves. The company’s flagship product is the “Blue Valve” our drill pipe float valve which has been a staple in the oilfield for years. Since 1996, the company has grown organically, through a commitment to produce quality products that deliver on performance, reliability, and availability. Industries served include oil and gas, water well, and air drilling operations. Drillmax headquarters and production facility are located in Houston, TX with a network of domestic and international distribution centres.”

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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Additional reading: Drill Stem Valve Services.