Core Application & Equipment Compatibility
These components are exclusively compatible with Shenkai FH23-70 Annular Blowout Preventer (BOP), a critical well control device for oil and gas drilling. Targeting drilling maintenance engineers and procurement teams, they resolve seal leakage, component wear, and structural loosening—key to preventing well blowouts. All comply with API 16A and GB standards, ensuring reliability in high-pressure (70MPa) downhole environments.
1. Main Structural Components
These components form the core structure of the FH23-70 BOP, withstanding extreme downhole pressure and vibration. A drilling team fixed housing leakage by replacing the worn ring and torqueing studs per API 16A, avoiding 10+ hours of unplanned downtime. Made of high-strength materials, they ensure long-term structural integrity.
No. | Description | P/N | Material | Main Wear Causes | Damage Prevention Notes |
1 | Housing | SKF15-238-01.01.00 | Forged alloy steel (AISI 4140), heat-treated, anti-corrosion coated | Fatigue from pressure cycling; erosion by abrasive drilling mud; corrosion from saltwater | Conduct ultrasonic crack testing quarterly; filter mud to 2μm; apply marine-grade anti-corrosion spray annually |
2 | Top Cover | SKF15-238-01.02 | Alloy steel, precision-machined sealing surface, zinc-plated | Sealing surface scratches; deformation from over-torqued fasteners; corrosion | Inspect surface for burrs before installation; torque fasteners to 500N·m per GB/T 5277; clean with diesel after use |
3 | Piston | SKF15-238-01.04 | Alloy steel piston body, hard chrome-plated surface, Viton seal grooves | Wear from reciprocation; seal groove damage; corrosion from hydraulic fluid contamination | Lubricate surface with API-certified grease; replace seals every 3 months; use ISO VG 46 hydraulic oil (DIN 51524) |
4 | Sealing Rubber Core | FH2870-05 | Reinforced HNBR rubber, steel reinforcement ring, heat-resistant | Abrasion from drill pipe; aging from high temperature (≥80℃); cuts from metal debris | Inspect for cuts before each use; limit operating temp to ≤70℃; replace after 600 drilling hours |
5 | Hold-down Ring | FH2870-01 | Alloy steel, heat-treated for hardness (HRC 40-45) | Deformation from uneven pressure; thread wear; corrosion from drilling fluids | Ensure uniform pressure distribution; inspect threads monthly; clean with neutral detergent after use |
6 | Wedge Block | FH2870-03 | Alloy steel, zinc-plated, precision-machined contact surface | Tooth wear from gripping drill pipe; corrosion; damage from improper installation | Lubricate with molybdenum disulfide grease daily; apply anti-rust spray; install with alignment tool |
7 | Lifting Eye | FH3570-04 | Carbon steel (Q235), hot-dip galvanized, load-rated (10t) | Fatigue from repeated lifting; corrosion from outdoor exposure; thread damage | Never exceed rated load; inspect for cracks weekly; retighten threads to 300N·m monthly |
8 | Joint | FH3570-13 | Stainless steel (316L), precision threads, PTFE seal | Thread galling; seal leakage; corrosion from acidic drilling fluids | Apply anti-seize compound to threads; replace PTFE seal quarterly; torque to 150N·m |
2. Sealing Components (O-rings/Sealing Rings/Mud Rings)
These seals prevent fluid leakage in the FH23-70 BOP, critical for well control. A drilling site resolved mud leakage by replacing the combination sealing ring and cleaning the groove, complying with API 16A seal standards. They resist high pressure and drilling fluid corrosion.
No. | Description | P/N | Material | Main Wear Causes | Damage Prevention Notes |
1 | O-ring Mud ring, O.D. | FH2870-06 | Viton (FKM), temperature-resistant (-20℃ to 200℃), oil-resistant | Aging from high temperature; nicks from sharp groove edges; swelling from incompatible fluids | Store in cool, dry place (≤25℃); deburr seal grooves; use Viton-compatible hydraulic oil |
2 | Mud Ring | FH2870-08 | NBR (Nitrile Rubber), reinforced with polyester fabric, DIN 53505 compliant | Abrasion from drilling mud; compression set from long-term pressure; aging | Clean mud residue after each use; limit compression deformation to ≤20%; replace every 2 months |
3 | Combination Sealing Ring, Mud ring, I.D. | FH2870-07 | HNBR (Hydrogenated Nitrile), dual-seal design, corrosion-resistant | Extrusion through gaps; damage from metal debris; swelling from drilling fluids | Ensure seal gap ≤0.1mm; filter mud to 3μm; inspect for extrusion before each operation |
4 | Sealing Ring, Housing | FH2870-10-0 | Viton (FKM), precision-molded, high-pressure resistant | Wear from housing vibration; aging from oxygen exposure; damage during installation | Use seal installation tool; store in airtight container; replace every 3 months |
5 | Sealing Ring, Mud Ring | FH2870-09-0 | NBR (Nitrile Rubber), oil-resistant, low-temperature tolerant (-40℃ to 120℃) | Pinching during assembly; vibration wear; corrosion from moisture | Lubricate with NBR-compatible grease before installation; secure with vibration-damping mounts; inspect weekly |
6 | Sealing Ring, Piston O.D. | FH2870-11-0 | Viton (FKM), reinforced with stainless steel spring, wear-resistant | Wear from piston reciprocation; damage from contaminated hydraulic oil; spring fatigue | Change hydraulic oil every 500h; clean piston surface weekly; replace if spring deformation is detected |
3. Wear-resistant Components
These components reduce wear on core BOP parts, extending service life. A drilling team extended piston lifespan by 40% by replacing worn rings and maintaining proper lubrication, adhering to API 16A maintenance guidelines. They are engineered for high-wear drilling scenarios.
No. | Description | P/N | Material | Main Wear Causes | Damage Prevention Notes |
1 | Wearing Ring, Housing | SKF15-238-01.06 | Stainless steel (316L), hard chrome-plated, wear-resistant (HV ≥800) | Scratching from metal debris; wear from piston contact; corrosion from moisture | Clean with diesel before installation; lubricate with anti-wear grease; inspect thickness monthly (replace if ≤5mm) |
2 | Wearing Ring, Piston | SKF15-238-01.05 | Bronze alloy (CuSn10), self-lubricating, corrosion-resistant | Abrasive wear from contaminated oil; fatigue from reciprocation; scoring from rough surfaces | Filter hydraulic oil to 2μm; replace every 4 months; ensure piston surface is smooth (Ra ≤0.8μm) |
4. Fasteners & Plugs (Screws/Studs/Nuts/Oil Plugs)
These fasteners secure FH23-70 BOP components, withstanding high vibration and pressure. A team resolved stud loosening by using lock washers and torqueing per GB standards, preventing component detachment. They meet industrial fastener standards for reliability.
No. | Description | P/N | Material | Main Wear Causes | Damage Prevention Notes |
1 | Removal of Screw | FH3570-19 | Alloy steel (10.9 grade), black oxide finish, high-torque design | Thread stripping from over-torque; corrosion from drilling fluids; fatigue from vibration | Torque to 80N·m per GB/T 5277; apply anti-seize compound; inspect threads before reuse |
2 | Stud | FH2870-02 | Alloy steel (12.9 grade), zinc-plated, precision threads | Thread galling; fatigue from pressure cycling; corrosion from saltwater | Lubricate threads with anti-seize; retighten monthly; replace every 6 months in offshore environments |
3 | Nut | FH3570-03A | Alloy steel (10.9 grade), zinc-plated, locknut design | Loosening from vibration; thread wear; corrosion from moisture | Use lock washers; torque to 450N·m; apply anti-rust spray monthly |
4 | Screw (GB30-76 M24x30) | GB30-76 M24x30 | Carbon steel (8.8 grade), zinc-plated, coarse thread | Shearing from excessive load; thread damage from improper installation; corrosion | Never exceed rated load (20kN); use thread alignment tool; replace if threads are damaged |
5 | Screw (GB70-76 M20×30) | GB70-76 M20×30 | Alloy steel (8.8 grade), zinc-plated, hexagon socket head | Cam-out damage to socket; fatigue from vibration; corrosion | Use matching socket tool; retighten monthly; store in dry environment |
6 | Screw (GB70-76 M36×80) | GB70-76 M36×80 | Alloy steel (10.9 grade), zinc-plated, high-strength | Bending from uneven loading; thread stripping; corrosion from drilling fluids | Torque to 350N·m; ensure uniform loading; clean with diesel after use |
7 | Oil Plug | 2C01.21 | Brass, NBR O-ring seal, external hexagon | Leakage from worn O-ring; thread damage from over-torque; corrosion | Replace O-ring quarterly; torque to 70N·m; apply anti-corrosion tape to threads |
8 | Plug | SFZ1310-04 | Stainless steel (304), PTFE seal, pressure-resistant | Seal damage from high pressure; thread galling; corrosion from acidic fluids | Limit pressure to 70MPa; apply anti-seize compound; inspect seal monthly |
5. One-Year Spare Parts Kit
This kit contains high-wear components for annual FH23-70 BOP maintenance, reducing unplanned downtime. Aligned with API 16A maintenance schedules, it ensures critical wear parts and seals are readily available for routine replacements in oilfield operations.
No. | Description | P/N | Material | Main Wear Causes | Storage & Usage Notes |
1 | O-ring Mud ring, O.D. | FH2870-06 | Viton (FKM) | Aging from temperature; nicks from improper storage | Store at -5℃ to 25℃; avoid direct sunlight; use within 12 months of receipt |
2 | Sealing Ring, Housing | FH2870-10-0 | Viton (FKM) | Wear from vibration; aging from oxygen exposure | Store in airtight container; inspect for cracks before use; replace in sets |
3 | Wearing Ring, Housing | SKF15-238-01.06 | Stainless steel (316L), hard chrome-plated | Scratching; corrosion from moisture | Wrap in anti-rust paper; clean before installation; lubricate with anti-wear grease |
4 | Combination Sealing Ring, Mud ring, I.D. | FH2870-07 | HNBR | Extrusion; damage from debris | Lubricate before use; clean seal groove thoroughly; discard if deformed |
5 | Sealing Ring, Mud Ring | FH2870-09-0 | NBR | Pinching; vibration wear | Use installation tool; check for burrs in groove; replace after each disassembly |
6 | Wearing Ring, Piston | SKF15-238-01.05 | Bronze alloy | Abrasive wear; fatigue | Store in dry environment; inspect for scoring before use; replace every 4 months |
7 | Sealing Ring, Piston O.D. | FH2870-11-0 | Reinforced Viton | Wear from reciprocation; spring fatigue | Check spring integrity before use; clean piston surface; replace if wear is visible |
FAQs
Question | Answer |
What is the recommended maintenance cycle for FH23-70 BOP seals? | Follow API 16A guidelines: Viton/HNBR seals every 3 months or 500 drilling hours; NBR seals every 2 months. Replace immediately if leakage, cuts, or swelling occurs to avoid well control risks. |
How to prevent thread galling on FH23-70 BOP fasteners? | Apply anti-seize compound (molybdenum disulfide-based) to threads before installation; avoid over-torque (follow GB/T 5277 torque specs); use precision-threaded fasteners and inspect threads for damage before reuse. |
Procurement Guidance
Genuine Shenkai FH23-70 BOP spare parts ensure compliance with API 16A and GB standards, critical for safe oil and gas drilling operations. Whether you need routine maintenance kits, structural components, or emergency replacements, we provide authentic parts matching original specifications. Contact our team with your drilling operation requirements for tailored recommendations and professional technical support to keep your BOP system reliable.
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