Equipment for fluid handling in drilling and/or completing and producing oil and gas wells, including drilling and production templates, adjustments subs, emergency backout subs, wellheads and connectors, valves, surface and subsea completion and production systems including christmas trees; diverter system for diverting the flow of drilling fluid in a riser pipe beneath a production platform; well tools for suspending casing within a well, including subsea wellheads and mudline hangers, and connectors for tying mudline hangers back to a production platform at the water surface, and metal connectors for well casing, connectors and couplings for connecting christmas tree or blowout preventer stacks to wellheads; none of the aforesaid goods comprising drilling tools and in particular drilling tools in the form of hammers and drill bits