The Weatherford WDD 550 is an HDD mud pump rated at 2000 PSI max working pressure and a max flow of 602.4 GPM at a rated speed of 350 SPM. The factory liner chart covers 3.5 in, 4 in and 4.5 in bores, with the 4.5 in liner reaching the full 602.4 GPM output. Its fluid end is made from cast ductile iron, a configuration aimed at the core HDD duty of continuous, large-volume fluid circulation for efficient cuttings transport, balancing strength, wear resistance and cost effectiveness. The same power end platform also underpins a separate well-service variant with a forged alloy steel fluid end for far higher pressures, which speaks to the reserve strength of the shared design. We supply replacement fluid-end parts for the WDD 550 to contractors in Canada, the United States and international oil and gas markets.
FAQ
What are the factory ratings of the Weatherford WDD 550?
Per the manufacturer spec sheet, the WDD 550 is rated at 2000 PSI max working pressure, a max flow of 602.4 GPM and a rated speed of 350 SPM.
What liner sizes does the WDD 550 use?
The factory chart lists 3.5 in, 4 in and 4.5 in liners. The 4.5 in liner delivers the maximum 602.4 GPM at rated speed, with lower outputs as liner size decreases.
What fluid end material does the WDD 550 use?
The WDD 550 uses a cast ductile iron fluid end, chosen for continuous HDD circulation duty where strength, wear resistance and cost effectiveness matter. A forged alloy steel fluid end is used on the related high-pressure well-service variant.
Do you supply fluid-end parts for the WDD 550?
Yes, we supply liners, pistons, valves, valve seats, packing and other fluid-end wear parts for the WDD 550. Send us your configuration and part list for availability.
Can you ship WDD 550 parts to Canada, the US or overseas?
Yes, we serve Canada, the United States and international oil and gas customers. Pump replacement parts are generally classified under HS code 84139100.