Product Introduction
This series of pulsation dampener replacement parts covers all core matching components for the LSNOI 3NB-1600 mud pump, including inner-hexagon screws, dampener casing, high-pressure diaphragm, diaphragm stabilizer, bearing retainer plates, high-strength bolts, studs, nuts, various washers, screw plugs, lifting screws, pipe caps, T-joints, O-ring seals, pressure gauges, cut-off valves, flanges and other dedicated fittings. Every part is made of high-strength alloy steel, high-pressure wear-resistant composite materials and corrosion-resistant rubber substrates, processed with precision machining and heat treatment processes to ensure perfect fit with original dampener interfaces, requiring no on-site modification, grinding or secondary processing. The parts are designed for quick disassembly and assembly under high-pressure working conditions, suitable for daily routine inspection, emergency leakage repair and full pulsation dampener overhaul.
Core Functional Specifications
Each component is engineered to withstand harsh high-pressure drilling site operating conditions, with clear authoritative performance indicators to ensure safe and stable field operation:
- High-Pressure Bearing Capacity: The entire pulsation dampener assembly supports a rated working pressure of 0-10MPa, fully adapting to the high-pressure mud pulsation elimination requirements of the LSNOI 3NB-1600 mud pump, resisting instantaneous hydraulic impact and long-term pressure fluctuation.
- Pulsation Absorption Performance: The high-strength special diaphragm efficiently absorbs reciprocating pressure pulsation, stabilizing mud circulation pressure and reducing equipment vibration and noise.
- Sealing Reliability: Custom O-ring seals and precision gaskets adopt oil-resistant, mud-resistant and aging-resistant materials, achieving zero high-pressure leakage under continuous hydraulic impact, with excellent durability.
- Pressure Monitoring Accuracy: The Y-100 model pressure gauge has a measurement accuracy of 2.5 levels, realizing real-time and accurate monitoring of internal dampener pressure, facilitating on-site equipment status judgment.
- Fastener Stability: 12.9-grade high-strength studs, bolts and matching nuts feature anti-loosening design, maintaining stable locking torque under long-term high-frequency vibration, with no fracture or loosening under rated pressure.
Structural Design Features
These pulsation dampener parts prioritize high-pressure safety, pulsation elimination efficiency and convenient on-site maintenance, fully adapted to harsh oilfield drilling high-pressure working environments:
- Integral High-Strength Casing Design: The dampener casing adopts integral precision forging, with uniform stress distribution, high rigidity and no deformation under high pressure, enhancing overall pressure resistance and stability.
- Reinforced Diaphragm Structure: The high-pressure composite diaphragm is matched with a special stabilizer, ensuring even stress on the diaphragm, avoiding eccentric wear and rupture, and prolonging diaphragm service life.
- Multi-Lage Sealing System: Double O-ring and precision washer sealing design is adopted at key high-pressure joints, effectively preventing high-pressure mud leakage and improving sealing reliability.
- Precision Cut-Off Valve Design: The special cut-off valve realizes quick pressure relief and pipeline shutoff, facilitating daily maintenance and component replacement without emptying the entire mud system.
- Standardized Flange Connection: The dedicated flange realizes perfect butt joint with the mud pump pipeline, ensuring stable connection and even sealing pressure under high-pressure conditions.
Maintenance & Service Recommendations
To ensure the safe and stable operation of the pulsation dampener under high-pressure conditions and prolong its service life, follow these API-standardized high-pressure equipment maintenance protocols:
- Daily Inspection: Check all high-pressure joints for mud or air leakage; monitor pressure gauge readings to ensure stable pressure; check for abnormal equipment vibration or noise.
- Weekly Maintenance: Tighten high-strength studs, bolts and nuts to API standard torque; clean mud deposits on the dampener surface and pressure gauge.
- Monthly Maintenance: Inspect O-rings and various washers for wear, aging or deformation; check diaphragm for cracks or damage; test the opening and closing flexibility of the cut-off valve.
- Quarterly Maintenance: Calibrate the pressure gauge for measurement accuracy; check the internal diaphragm stabilizer for looseness; replace severely worn sealing parts and fasteners.
- Storage Requirements: Store spare parts in a dry, ventilated and dust-free environment; apply anti-rust treatment on metal fasteners; rubber sealing parts should be protected from direct sunlight and high temperature to prevent premature aging.
We supply the following spare parts:
| 107.130.00-2 Pulsation Dampener | ||
| Item No. | Part No. | Description |
| 601 | 107.130.15 | Inner-hexagon screw M33x2-2a |
| 602 | 107.130.01-1 | Casing |
| 603 | 107.130.01.00-1 | Diaphragm |
| 604 | 107.130.02 | Diaphragm stabilizer |
| 605 | 107.130.04 | Main bearing retainer plate |
| 606 | 107.130.05 | Bolt 1”-8UNC-2A |
| 607 | GB93-87 | Washer 27 |
| 608 | 107.130.13 | Screw plug 1-1/4”-18NPT |
| 609 | GB825-88 | Lifting screw M20 |
| 610 | 107.130.06 | Pipe cap G5/8” |
| 611 | 107.130.07 | Washer Φ19 δ4 |
| 612 | 107.130.08 | T-joint |
| 613 | 107.130.09-1 | Washer Φ12/Φ 7 δ3 |
| 614 | 107.130.10-1 | Washer Φ16/Φ 7 δ3 |
| 615 | Y-100 model | Pressure gauge 0-10MPa 2.5 |
| 616 | 107.130.03.00 | Cut-off valve |
| 617 | 107.132.04 | Cover |
| 618 | 107.132.05 | Nut M48x3-2a |
| 619 | 107.132.06 | Stud M48x3-2a |
| 620 | D4-4-66 | O-ring 140×5.7 |
| 621 | 107.130.16 | Flange |
| 622 | 107.04.110.44 | Nut M33x2-2a |
| 623 | 107.130.03 | Stud M33x2-2a L=100 |
On-Site Fault Repair Case Studies
Case 1: Diaphragm Rupture Causing Pressure Instability
A land deep-well drilling rig’s LSNOI 3NB-1600 mud pump suffered from severe pressure fluctuations and abnormal vibration. On-site inspection revealed that the high-pressure diaphragm (107.130.01.00-1) was ruptured due to long-term hydraulic impact, losing pulsation absorption function. Maintenance personnel replaced the damaged diaphragm and matching stabilizer, re-tightened all high-strength fasteners, and the mud pressure returned to stable state.
Case 2: O-Ring Failure Leading to High-Pressure Leakage
An offshore drilling site’s 3NB-1600 mud pump pulsation dampener had high-pressure mud leakage at the flange joint. Long-term mud erosion and temperature changes caused the O-ring (D4-4-66, 140×5.7) to age and lose elasticity, resulting in sealing failure. Technicians replaced the damaged O-ring, cleaned the sealing surface, and completely eliminated the leakage fault.
Case 3: Loose Studs Triggering Pressure Drop
A drilling team’s 3NB-1600 mud pump showed a sudden drop in dampener internal pressure and poor pulsation elimination effect. Inspection found that the high-strength studs (107.130.03) were loose due to continuous equipment vibration, leading to internal pressure leakage. Workers re-tightened all studs to rated torque, replaced worn matching nuts, and restored normal working performance of the dampener.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these pulsation dampener parts exclusively compatible with LSNOI 3NB-1600 mud pump? | Yes, all parts in this catalog are precisely designed to match the LSNOI Lanzhou LS 3NB-1600 mud pump pulsation dampener (107.130.00-2), with OEM-standard dimensions and perfect high-pressure interface fitting, no on-site modification required for installation. |
| What is the standard tightening torque for M33×2 and M48×3 high-strength studs? | Per API 7K high-pressure equipment standards, M33×2 studs use a tightening torque of 850-900N·m, and M48×3 studs use 1300-1350N·m; tighten evenly in a crosswise sequence to ensure uniform sealing pressure. |
| How often should the diaphragm and O-ring seals be replaced? | Under normal high-pressure drilling conditions, diaphragms and O-rings are recommended for replacement every 2800-3200 working hours; in high-abrasion, high-corrosion mud environments, shorten the cycle to 2000-2500 working hours to avoid sudden failures. |
Procurement Guidance
This LSNOI 3NB-1600 mud pump pulsation dampener parts list is a professional and reliable reference for oilfield drilling equipment management, high-pressure hydraulic system maintenance and spare parts procurement teams, providing standardized, high-pressure-resistant and wear-resistant spare parts solutions for daily routine maintenance, emergency leakage repair and spare parts inventory preparation. Using these OEM-standard replacement parts can effectively avoid the risks of poor fitting, insufficient pressure resistance and short service life caused by non-standard parts, quickly resolve common pulsation dampener faults, and ensure stable operation of the mud pump circulation system.
