PCP Drivehead Braking System
Drawing · PDF · en · 50 KB
About this document
A one-page description, with a drawing, of how the braking system of Energinn's PCP wellhead drives works. It covers the two directions the hollow main shaft can turn.
In forward motion, the operating direction, the braking system does not slow the main shaft down.
In backward motion the drive performs a controlled back-spin that releases the energy stored in the rod string. The opposite rotation engages a clutch (freewheel) installed between the pinion shaft and the brake pump, so the brake pump turns as well. The pump draws oil from the gearbox and pushes it through the orifice of a flow control valve, which retards the oil flow and so controls the speed of the back-spin; the oil then returns to the gearbox.
The orifice sits inside the flow control valve and is adjustable, as the drawing shows, and the document notes that the valve must be open during regular operation. It is useful for operators and service crews who need to understand recoil control before a shutdown, a pump change or a workover on a progressive cavity pump well.
This is reference material, not a product page. It stays accurate as stock moves, and links to whatever the catalogue holds today rather than quoting a price that will age.