Core Application & Equipment Compatibility
These parts are exclusively designed for the Shenkai FHZ35-35 Annular Blowout Preventer (BOP), a key well control device for oil and gas drilling operations. Targeting drilling maintenance engineers and procurement teams, they address seal leakage, component wear, and structural loosening—critical for mitigating well control risks. All comply with API 16A and GB/T standards, ensuring reliability in 35MPa working pressure and harsh drilling environments.
1. Main Structural Components
These core components form the FHZ35-35 BOP’s framework, bearing high pressure and mechanical load during drilling. A drilling team resolved shell deformation by replacing the worn part (API 16A compliant) and optimizing fastener torque, avoiding 8+ hours of unplanned downtime. They ensure structural stability and operational safety.
No. | Description | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | Shell | H28B.07.00 | Forged alloy steel (AISI 4130), heat-treated, anti-corrosion coated, API 16A compliant | Pressure cycling fatigue; abrasive drilling mud erosion; external impact damage | Conduct quarterly ultrasonic crack testing; use filtered drilling mud; avoid direct mechanical impact during handling |
2 | Bonnet | H28B.05 | Alloy steel, precision-machined sealing surface, zinc-plated for corrosion resistance | Sealing surface scratches; over-torque deformation; drilling fluid corrosion | Deburr surfaces before installation; torque fasteners per GB/T 5277 specs; clean with neutral detergent post-operation |
3 | Piston | H28B.06 | Alloy steel, hard chrome-plated surface, precision-machined for reciprocating motion | Reciprocating wear; seal groove damage; hydraulic fluid contamination corrosion | Lubricate with API-certified hydraulic oil; inspect seal grooves monthly; replace hydraulic oil every 6 months |
4 | Body Sleeve | H28.14.00 | Carbon steel, anti-wear coating, compatible with high-pressure working conditions | Internal friction wear; drilling fluid erosion; thermal expansion deformation | Ensure proper alignment with piston; clean internal surface weekly; monitor working temperature (≤80℃) |
5 | Tapered Packer | H28.09.00 (1003263-02) | Reinforced rubber with steel core, pressure-resistant, wear-resistant | Abrasion from drill pipe; high-pressure compression set; aging from thermal exposure | Inspect for cracks pre-operation; limit compression deformation to ≤25%; replace after 400 drilling hours |
6 | Anti-wear Plate | H28.10 | Wear-resistant steel (Mn13), heat-treated, high hardness (HRC ≥50) | Impact wear from drilling tools; abrasive mud erosion; surface fatigue | Inspect surface wear monthly; replace if wear depth exceeds 3mm; clean mud residue after each use |
2. Sealing Components
These sealing parts are critical for preventing fluid leakage in the FHZ35-35 BOP, ensuring well control integrity. A drilling site resolved hydraulic fluid leakage by replacing worn O-rings and cleaning seal grooves (per GB/T 3452.1 standards), avoiding hydraulic system contamination and operational downtime.
No. | Description | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | O-ring | H28.01 | Nitrile Rubber (NBR), oil-resistant, GB/T 3452.1 compliant, -40℃ to 120℃ temperature range | Sharp groove nicks; hydraulic oil aging; thermal expansion damage | Deburr seal grooves before installation; store in cool dry place (≤25℃); use compatible hydraulic oil |
2 | Inner Sealing Ring of Bonnet | H28.02 | Hydrogenated Nitrile Rubber (HNBR), high-pressure resistant, wear-resistant | Bonnet vibration wear; pressure cycling deformation; drilling fluid corrosion | Ensure bonnet alignment during installation; inspect monthly for compression set; replace every 3 months |
3 | Upper Sealing Ring of Piston | H28.03 | HNBR, reinforced with stainless steel spring, compatible with reciprocating motion | Piston reciprocation wear; spring fatigue; hydraulic fluid contamination | Lubricate with anti-wear grease; check spring integrity monthly; replace if surface cracks occur |
4 | Lower Sealing Ring of Piston | H28.04 | HNBR, dual-seal design, high-pressure tolerance (35MPa) | Low-temperature hardening; pressure impact damage; piston misalignment wear | Maintain working temperature ≥-10℃; avoid sudden pressure spikes; ensure piston concentricity |
5 | O-ring | 53×5.3 | NBR, standard size, oil-resistant, GB/T 3452.1 compliant | Installation damage; vibration wear; aging from oxygen exposure | Use seal installation tool; store in airtight container; replace during routine maintenance |
6 | O-ring | 25×2.65 | NBR, small-size, suitable for fastener sealing, corrosion-resistant | Fastener torque damage; moisture corrosion; improper installation pinching | Torque fasteners to specified values; apply anti-rust spray; avoid over-compression during installation |
3. Fasteners, Plugs & Lifting Parts
These parts secure and connect BOP components, withstanding high vibration and pressure. A team resolved screw loosening by torqueing per GB/T 70.1 and GB/T 5783 standards, preventing component detachment and ensuring operational safety in high-load drilling scenarios.
No. | Description | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | Screw | GB/T70.1 M12×40 | 8.8-grade alloy steel, hexagon socket head, zinc-plated, GB/T 70.1 compliant | Over-torque thread stripping; vibration fatigue; corrosion from moisture | Torque to 45N·m; apply anti-seize compound; inspect threads before reuse |
2 | Screw | GB/T70.1 M12×70 | 8.8-grade alloy steel, hexagon socket head, zinc-plated, high-torque design | Bending from uneven loading; thread wear; drilling fluid corrosion | Ensure uniform loading; torque to 50N·m; clean with diesel after use |
3 | Bolt | GB/T5783 M12×35 | 8.8-grade alloy steel, hexagon head, zinc-plated, GB/T 5783 compliant | Vibration loosening; thread galling; atmospheric corrosion | Use lock washers; torque to 40N·m; monthly anti-rust spray application |
4 | Supporting Screw of Jaw Chuck | H28.13 | 7.8-grade carbon steel, thread rolled, corrosion-resistant coating | Jaw chuck movement wear; thread damage; impact during operation | Lubricate threads weekly; inspect jaw alignment; avoid excessive impact |
5 | Screw of Jaw Chuck | H28.12 | 8.8-grade alloy steel, hexagon head, compatible with jaw chuck torque | Jaw clamping wear; thread stripping; drilling fluid contamination | Torque to 35N·m; clean threads after each use; replace if thread deformation occurs |
6 | Z1” External Hexagonal Screw Plug | 2C01.21 | Brass, external hexagon, NBR O-ring seal, pressure-resistant | Seal leakage; thread damage; over-torque deformation | Torque to 60N·m; inspect O-ring monthly; apply anti-corrosion tape to threads |
7 | Screw Plug Z 3/4” | SFZ1310-01 | Stainless steel (304), external thread, PTFE seal | Thread galling; seal aging; corrosion from acidic drilling fluid | Apply anti-seize compound; replace PTFE seal quarterly; store in dry environment |
8 | Shackle | S-BX4.75-3/4 | Alloy steel, hot-dip galvanized, safety latch design, 4.75t load rating | Lifting fatigue; latch damage; corrosion from outdoor exposure | Never exceed rated load; inspect latch integrity pre-use; apply anti-rust spray monthly |
4. Jaw Chuck Assembly Parts
These parts form the jaw chuck mechanism of the FHZ35-35 BOP, responsible for gripping drill pipes. A drilling team resolved jaw slipping by replacing worn jaw chucks and adjusting supporting screws, restoring drill pipe clamping stability and avoiding operational risks.
No. | Description | Part No./Model | Material | Main Wear Causes | Damage Prevention Notes |
1 | Jaw Chuck | H28.11 | Alloy steel, heat-treated (HRC 40-45), serrated contact surface for grip | Drill pipe gripping wear; serration deformation; impact damage | Inspect serrations weekly; avoid over-clamping; replace if serration wear exceeds 1mm |
2 | Bonnet Chuck | FHZ5414-04 | Alloy steel, zinc-plated, precision-machined for bonnet connection | Bonnet vibration wear; thread damage; misalignment stress | Ensure alignment with bonnet; torque to specified values; inspect monthly for looseness |
3 | Adapter Substitute | FHZ5414-10 | Alloy steel, anti-corrosion coated, compatible with jaw chuck and body | Friction wear; drilling fluid corrosion; thermal stress deformation | Lubricate contact surfaces weekly; clean after use; monitor working temperature |
5. One-Year Spare Parts Kit
This kit includes high-wear sealing components for annual maintenance of the FHZ35-35 BOP, reducing unplanned downtime. Aligned with API 16A maintenance schedules, it ensures critical seals are readily available for routine replacements, maintaining BOP operational reliability.
No. | Description | Part No./Model | Material | Main Wear Causes | Storage & Usage Notes |
1 | O-ring | H28.01 | NBR, GB/T 3452.1 compliant | Aging; installation damage; fluid contamination | Store at ≤25℃ in dry airtight container; use within 12 months of receipt |
2 | Inner Sealing Ring of Bonnet | H28.02 | HNBR, high-pressure resistant | Vibration wear; compression set | Avoid direct sunlight; inspect for cracks before use; replace during quarterly maintenance |
3 | Upper Sealing Ring of Piston | H28.03 | HNBR with stainless steel spring | Reciprocation wear; spring fatigue | Store flat to prevent deformation; check spring integrity before installation |
4 | Lower Sealing Ring of Piston | H28.04 | HNBR, dual-seal design | Pressure impact; low-temperature damage | Store above -10℃; avoid sharp objects during storage |
5 | O-ring | 53×5.3 | NBR, standard size | Installation pinching; aging | Sort by size for easy access; use installation tool to avoid damage |
6 | O-ring | 25×2.65 | NBR, small-size | Moisture corrosion; over-compression | Apply anti-rust agent before storage; torque fasteners properly during installation |
FAQs
Question | Answer |
What are the key maintenance cycles for FHZ35-35 BOP parts? | Follow API 16A guidelines: Seals (O-rings, sealing rings) every 2-3 months; structural parts (shell, piston) quarterly ultrasonic testing; anti-wear plate and jaw chuck monthly wear inspection. Annual replacement of spare parts kit components. |
How to select compatible fluids for FHZ35-35 BOP? | Use hydraulic oil complying with ISO VG 46 and API 682 standards, compatible with NBR/HNBR seals. Drilling fluid must be filtered to ≤2μm to avoid abrasive wear on seals and moving parts. Avoid acidic fluids to prevent corrosion. |
Procurement Guidance
Genuine parts for the Shenkai FHZ35-35 Annular BOP ensure compliance with API 16A and GB/T standards, critical for safe oil and gas drilling operations. Whether for routine maintenance, structural replacements, or emergency repairs, we provide authentic parts matching original specifications. Contact our team with your drilling operation needs for tailored recommendations and professional technical support to maintain reliable BOP performance.
contact us ：
Emeil: [email protected] whatsapp: +86 15275658619
Should you have any purchase intentions, please contact us – we will offer you our most favorable price.