about Us
DONGYING ZEYI Petroleum Equipment Co., Ltd. is an integrated manufacturer and supplier specializing in the R&D, production, and sales of petroleum equipment and spare parts. We provide one-stop solutions with both standard and customized options, backed by strict quality control and professional technical support. Serving customers worldwide across Europe, the Americas, the Middle East, Southeast Asia, and beyond, we are committed to delivering reliable products and responsive service.
Industry Solutions
NOV Roughneck Drilling Rig Spare Parts
Product Description This comprehensive collection features direct-fit OEM replacement parts for NOV Roughneck iron roughnecks and associated drilling machinery, eliminating compatibility errors and restoring factory-level
PCT-621 A Cementing Complexes Spare Parts
Product Description This comprehensive spare parts package includes all critical wear components, sealing elements, shafts, valves, bearings, and fasteners for the PCT-621 A cementing complex,
PSM Pacemaker Triplex Plunger Pump Replacement Parts
1. Product Description This comprehensive parts catalog features fully interchangeable components for Pacemaker Triplex Plunger Pumps, optimized for 3.5” and 4.5” plunger packing configurations. Every
PUMP 375-7M Fluid End Replacement Spare Parts
Product Description This comprehensive collection features direct-fit OEM replacement parts for full repairs and maintenance of the PUMP 375-7M fluid end, covering crankshaft bearings, connecting
Latest articles
05/29/2026
PSM Pacemaker Triplex Plunger Pump Replacement Parts
1. Product Description This comprehensive parts catalog features fully interchangeable components for Pacemaker Triplex Plunger Pumps, optimized for 3.5” and 4.5” plunger packing configurations. Every part is manufactured to strict ISO 9001 quality standards, using high-grade materials: hardmetal-coated plungers for abrasion resistance, 90-durometer nitrile O-rings for chemical compatibility, forged steel hardware for load-bearing strength, and Chevron-style gland packs for high-pressure sealing. Unlike generic aftermarket parts, these components match OEM dimensional tolerances (±0.001” precision) to eliminate fit gaps and assembly errors.
PUMP 375-7M Fluid End Replacement Spare Parts
Product Description This comprehensive collection features direct-fit OEM replacement parts for full repairs and maintenance of the PUMP 375-7M fluid end, covering crankshaft bearings, connecting rod bushings, sealing gaskets, carbide plungers, suction/discharge valves, lubrication components, fasteners, and electrical control switches. Unlike generic aftermarket alternatives, each component is built to the exact design, material, and tolerance specifications of the original PUMP 375-7M fluid end, ensuring seamless installation, zero compatibility errors, and reliable performance under the harsh conditions of oilfield drilling. The
PUMP 375-7M Power End Replacement Spare Parts
Product Description This comprehensive collection features direct-fit OEM replacement parts for routine maintenance and critical repairs of the PUMP 375-7M power end, covering structural frames, connecting rods, crosshead assemblies, protective covers, sealing gaskets, lubrication components, and high-strength fasteners. Unlike generic aftermarket alternatives, each component is built to the original PUMP 375-7M design specifications, material grades, and dimensional tolerances, ensuring seamless installation, zero compatibility errors, and consistent performance under the harsh conditions of 24/7 drilling operations. The lineup is curated to
User comments
Oilfield Project Manager, Middle East
“We worked with THEEASY on a custom BOP project, and their OEM service was excellent. Quality and delivery exceeded our expectations.”
Field Operations Director, Central Asia
“We have cooperated with THEEASY on multiple projects. Stable quality, clear documentation, and professional service make them a trusted supplier.”
Procurement Manager, Southeast Asia
“THEEASY provided wellhead equipment and spare parts for our drilling program. Competitive pricing, stable quality, and on-time delivery.”
Engineering Manager, Europe
“Their engineering team supported us with customized mud pump solutions tailored to our project requirements. Communication and execution were excellent.”
