Pressure testing of well servicing systems

A method for hydrostatic pressure testing a well servicing system using pumping equipment including a primary mover coupled by a drive train comprising a transmission to a pump, the primary mover having at least two discrete operating levels, the method comprising the steps of:

• putting the transmission into neutral to disengage the primary mover from the drive train;
• containing the well servicing system;
• engaging a hydrostatic pressure testing drive mechanism with the drive train while the transmission is in neutral;
• and
• activating the hydrostatic pressure testing drive mechanism to engage with and rotate the drive train for pumping and compressing test fluid into the well servicing system with the pump without using the primary mover, wherein the hydrostatic pressure testing drive mechanism is configured to operate between at least two of the discrete operating levels of the primary mover.

A method for low rate pumping of an open well servicing system using pumping equipment and including a primary mover coupled to the pumping equipment by a drive train comprising a transmission, wherein at least one of the primary mover and the transmission have at least two discrete operating levels, the method comprising the steps of:

• putting the transmission into neutral;
• engaging a low rate pumping drive mechanism with the drive train at a point in the drive train between the transmission and the pumping equipment, wherein the low rate pumping drive mechanism is configured to operate between at least two of the discrete operating levels;
• and
• activating the low rate pumping drive mechanism to engage with and rotate the drive train for pumping fluid into the well servicing system with the pump at a predetermined flow rate without using the primary mover, wherein the low rate pumping drive mechanism is powered by the primary mover.

A well services pumping system comprising:

• pumping equipment comprising a primary mover for driving the pumping equipment, the primary mover having at least two discrete operating levels;
• a drive mechanism separate from the primary mover and configured to operate between at least two of the discrete operating levels;
• and
• a coupler with a predetermined gear ratio for coupling the separate drive mechanism to engage with and rotate the pumping equipment when the coupler is engaged with the pumping equipment while the primary mover is unable to rotate the pumping equipment,
• where the predetermined gear ratio is selected from a first predetermined gear ratio satisfying pressure testing requirements, a second predetermined gear ratio satisfying low rate pumping requirements or a third predetermined gear ratio satisfying both pressure testing requirements and low rate pumping requirements, wherein at least one of the first, second, and third gear ratios is configured to operate between at least two of the discrete operating levels.