WITSML - Rig Pump Component Schema Relative pump number. One-based. Manufacturer / supplier of the item. Manufacturers designated model. Date and time of pump installation. Date and time the pump was removed. Contractor/owner. Pump type reference list. Number of cylinders (3=single acting, 2 = double acting) Rod outer diameter. Inner diameter of the pump liner. Pump action. 1 = Single acting, 2 = double acting. Efficiency of the pump. Stroke length. Maximum pump pressure. Maximum hydraulics horsepower. Maximum Speed. Pump displacement. Pulsation dampener pressure. Pulsation dampener volume. Maximum mechanical power. An identification tag for the pump. A serial number is a type of identification tag however some tags contain many pieces of information. This structure just identifies the tag and does not describe the contents. Unique identifier for the pump.