This technical specification is tailored for maintenance engineers and procurement specialists managing Shenkai (Shanghai) BOP Models FZ35-35 and 2FZ35-35. These blowout preventers are critical safety barriers in drilling operations. The following components ensure compliance with API 16A specifications, guaranteeing reliable well control under high-pressure conditions (35MPa).
Product Description: The Ram Blocks and supporting Rubber elements are the primary sealing interface within the BOP stack. They are designed to shear, seal, or hang tubulars under extreme downhole pressures.
Pain Point & Value: Premature wear or chemical degradation of the rubber element can lead to catastrophic seal failure. Our specifications prioritize high-performance elastomers capable of withstanding H2S, high temperatures, and aggressive drilling fluids.
Operational Context: Routine drilling operations, well intervention, and emergency shut-in scenarios.
No. | Pipe Size | Component Type | Part Number | Material Specification | Primary Wear Causes | Maintenance & Handling Precautions |
1 | 5" | Ram Block Body | DFZ1310.01A-03 | Alloy Steel + Hardfacing | Impact fatigue, keyway wear | Inspect for cracks in the dovetail; ensure the locking mechanism engages fully. |
2 | 5" | Rubber Packing Unit | DFZ1310.01A01-00 | Polyurethane / HPE | Swelling, extrusion, thermal aging | Store in a cool, dark environment; inspect for permanent set before installation. |
3 | 4 1/2" | Ram Block Body | DFZ1310.01B-02 | Alloy Steel + Hardfacing | Same as above | Same as above |
4 | 4 1/2" | Rubber Packing Unit | DFZ1310.01B01-00 | Polyurethane / HPE | Same as above | Same as above |
5 | 3 1/2" | Ram Block Body | DFZ1310.01C-02 | Alloy Steel + Hardfacing | Same as above | Same as above |
6 | 3 1/2" | Rubber Packing Unit | DFZ1310.01C01-00 | Polyurethane / HPE | Same as above | Same as above |
7 | 7" | Ram Block Body | DFZ1310.01D-02 | Alloy Steel + Hardfacing | Same as above | Same as above |
8 | 7" | Rubber Packing Unit | DFZ1310.01D01-00 | Polyurethane / HPE | Same as above | Same as above |
9 | Blind | Ram Block Body | DFZ1310.01E-02 | Heavy-Duty Cast Steel | Shear stress, impact load | Critical: Only close on empty wellbore; never use for routine shut-in. |
10 | Blind | Rubber Packing Unit | DFZ1310.01E01-00 | Heavy-Duty Elastomer | Extrusion under full-bore pressure | Check the rubber flowability; ensure the metal backers are intact. |
... | ... | ... | ... | ... | ... | ... |
28 | 9 7/8" | Ram Block Body | DFZ1310.01U-02 | Alloy Steel + Hardfacing | Same as above | Same as above |
29 | 9 7/8" | Rubber Packing Unit | DFZ1310.01U01-00 | Polyurethane / HPE | Same as above | Same as above |
30 | 7 7/8" | Ram Block Body | DFZ1310.01V-02 | Alloy Steel + Hardfacing | Same as above | Same as above |
31 | 7 7/8" | Rubber Packing Unit | DFZ1310.01V01-00 | Polyurethane / HPE | Same as above | Same as above |
Product Description: These parts constitute the hydraulic actuation system responsible for translating hydraulic pressure into linear motion to close and open the rams.
Pain Point & Value: Internal leakage due to piston seal failure reduces closing efficiency. Precision machining of the piston and wear rings is vital to maintain hydraulic integrity.
Operational Context: Hydraulic system maintenance, leak testing, and actuator overhauls.
表
No. | Component Name | Part Number | Material Specification | Primary Wear Causes | Maintenance & Handling Precautions |
1 | Piston | DFZ5414-14 | Hard-Anodized Aluminum / Steel | Scoring, wear, seal groove damage | Clean hydraulic oil is mandatory; inspect surface finish for nicks. |
2 | Piston Seal | DFZ5414-13 | Rubber-Encapsulated O-ring / U-cup | Extrusion, wear, compression set | Replace all dynamic seals as a set; lubricate before installation to prevent nipping. |
3 | Packing Bearing Ring | DFZ5414-31 | Reinforced Phenolic / PEEK | Crushing, chipping | Prevents extrusion of the elastomer seal; inspect for gaps. |
4 | Back-up Ring | DFZ5414-24 | PTFE / Nylon | Abrasion, cutting | Used in high-pressure zones; ensure proper orientation. |
Product Description: Bushings, retaining rings, and screws provide structural integrity, guidance, and secure fastening for moving parts.
Pain Point & Value: Improperly sized or low-grade fasteners can shear during operation, leading to equipment disassembly under pressure. We specify high-tensile hardware to mitigate this risk.
Operational Context: Structural assembly, alignment checks, and routine bolting.
No. | Component Name | Part Number / Spec | Material Specification | Primary Wear Causes | Maintenance & Handling Precautions |
1 | Bushing (Guide) | 2FZ5414B-07 | High-Strength Bronze | Galling, excessive clearance | Check radial clearance; ensure lubrication grooves are clean. |
2 | Retracting Screw | DFZ1310.01A-04 | High-Tensile Alloy Steel | Fatigue fracture, thread stripping | Critical: Check torque regularly; inspect for corrosion pitting. |
3 | Retainer Ring | DFZ5414-33 | Spring Steel | Breakage, loss of tension | Inspect groove for wear; use snap-ring pliers for removal/installation. |
4 | Screw | GB70 M12*65 | Carbon Alloy Steel | Vibration loosening, shear | Use thread locker where specified; check tightness after thermal cycling. |
5 | Locking Nut | DFZ5414-44 | Alloy Steel | Back-off, thread damage | Ensure the locking mechanism (e.g., cotter pin) is engaged. |
Product Description: These components protect the hydraulic system from external contaminants (dirt, sand) and prevent internal fluid leakage.
Pain Point & Value: Contaminated hydraulic fluid is the leading cause of valve and actuator failure. Effective wiper systems extend the life of expensive hydraulic components.
Operational Context: Preventative maintenance, environmental sealing, and fluid cleanliness programs.
No. | Component Name | Part Number / Spec | Material Specification | Primary Wear Causes | Maintenance & Handling Precautions |
1 | Wiper Ring | Q/ZB336-77 | Polyurethane | Lip wear,(rolling), aging | Clean the rod surface before retraction; replace if the lip is damaged. |
2 | Wiper Ring | DFZ5414-22 | Polyurethane | Same as above | Same as above |
3 | Wiper Seat Retainer | DFZ5414-23 | Spring Steel / Alloy | Deformation, loosening | Ensures the wiper stays in place under pressure; check seating. |
4 | O-ring | 105*3.1 | NBR / FKM | Extrusion, chemical attack | Select FKM for high-temp applications; inspect gland for sharp edges. |
5 | Washer | DFZ5414-28 | Spring Steel | Flattening, fatigue | Use hardened washers under high preload; replace if distorted. |
Product Description: Door seals and thrust sleeves are essential for maintaining the pressure boundary of the BOP housing, particularly at the side door closures.
Pain Point & Value: Side door leaks are a common safety hazard. Proper installation of the door seal and accurate torque on the housing bolts are non-negotiable.
Operational Context: Side door maintenance, housing integrity testing.
No. | Component Name | Part Number | Material Specification | Primary Wear Causes | Maintenance & Handling Precautions |
1 | Door Seal | 2FZ3535-15 | Nitrile Rubber (NBR) | Extrusion, compression set | Inspect the sealing groove for nicks; lubricate thoroughly before closing the door. |
2 | Thrust Shaft Sleeve | 2FZ3535-17A | Wear-Resistant Alloy | End-face wear, scoring | Acts as a bearing surface; check for axial play. |
3 | Retainer Ring | GB/T893.1 95 | Standard Spring Steel | Ejection, breakage | Standard industrial size; verify fit in the groove. |
4 | Y-ring | SKZF100.01 | Polyurethane | Twisting, wear | Used for reciprocating motion; ensure correct gland depth. |
5 | W-ring | DFZ5414-25 | Special Section Rubber | Deformation, wear | Special profile for specific glands; refer to assembly drawing. |
Ensure your drilling operations remain compliant and safe by verifying your inventory against this technical standard. Whether you require a complete Ram Block assembly for a 5" pipe or critical replacement seals for your hydraulic actuator, sourcing components that meet the original Shenkai specifications is paramount.
Procurement Guidance: Do not compromise on elastomer quality or fastener grade. Contact us today with your specific Part Numbers to secure genuine-quality replacements and avoid costly downtime.
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