Parts for Shanghai B.O.P. Control System

1

Crankshaft Plunger Pump

QB21-60, QB21-80

Pump body: nodular cast iron (QT450-10); Plunger: stainless steel 316L; Valve core: hardened alloy steel (HRC 60-62); Seals: FKM (Viton)

1. High-pressure hydraulic oil causes plunger wear and seal extrusion; 2. Contaminant particles in oil lead to valve core scratching and jamming.

1. Use hydraulic oil that meets API RP 13D standards and maintain cleanliness (NAS 7 class or higher); replace filters regularly; 2. Conduct pressure testing every 3 months to check for internal leakage and plunger wear.

2

Relief Valve

JYS21-25, JYSQ21-25

Valve body: carbon steel (galvanized); Valve core: stainless steel 304; Spring: 65Mn alloy steel; Seals: PTFE

1. Frequent pressure relief cycles cause spring fatigue and valve core wear; 2. Corrosive gas ingress leads to valve body corrosion and seal failure.

1. Regularly calibrate the relief pressure to match the system’s rated pressure; avoid overpressure operation; 2. Apply anti-corrosion grease to the valve body and fasteners in marine/offshore environments.

3

Relief Valve

JYSQM21-25

Valve body: aluminum alloy (anodized); Valve core: hardened stainless steel; Seals: FKM (Viton); Adjustment knob: engineering plastic (glass fiber reinforced)

1. Improper adjustment torque causes valve core deformation; 2. High-temperature hydraulic oil accelerates seal aging and leakage.

1. Use a torque wrench for pressure adjustment to avoid excessive force; 2. Monitor hydraulic oil temperature and ensure it does not exceed 120°C; install a cooling system if necessary.

4

Pneumatic Pump

QYB 40-120L

Pump body: aluminum alloy; Piston: carbon steel (chrome-plated); Seals: NBR; Air chamber: stainless steel 316

1. Compressed air impurities (water, oil) cause piston corrosion and seal damage; 2. Frequent start-stop cycles lead to valve seat wear.

1. Install an air filter regulator (with drying function) at the air inlet to ensure clean, dry air supply; 2. Drain the air chamber’s condensed water daily to prevent internal corrosion.

5

3-position and 4-way Rotary Valve

34ZS21-25

Valve body: brass; Valve core: hardened steel; Seals: FKM (Viton); Rotary handle: carbon steel (anti-slip coating)

1. Frequent rotary operation causes wear between valve core and sleeve; 2. Dust and oil contamination lead to valve core jamming.

1. Clean the valve surface and rotary mechanism regularly; apply lubricating grease to the handle pivot; 2. Avoid rapid, forceful rotation of the handle to reduce impact on valve core and seals.

1

Magnetic Starter

BQD6-T

Housing: cast aluminum alloy (explosion-proof); Internal contacts: silver alloy; Insulation material: epoxy resin; Sealing ring: NBR

1. Frequent on/off operations cause contact ablation and wear; 2. Humid environment leads to internal insulation aging and short circuits.

1. Check contact wear regularly; polish or replace contacts when ablation depth exceeds 0.5mm; 2. Ensure the explosion-proof housing’s sealing ring is intact; replace if cracked or hardened.

2

Explosion-proof Control Box

BKX6-T

Housing: cast iron (HT200); Door seal: EPDM rubber; Internal terminals: copper alloy (tinned); Insulation board: phenolic resin

1. Explosive gas and dust ingress (due to seal failure) cause internal corrosion; 2. Vibration from drilling operations leads to terminal loosening and wire wear.

1. Tighten the housing bolts evenly to ensure explosion-proof sealing; inspect seals quarterly; 2. Secure internal wires with cable ties to avoid vibration-induced wear; check terminal tightness monthly.

3

Explosion-proof Pressure Controller

FBYK-165

Housing: stainless steel 316; Sensing element: diaphragm (titanium alloy); Electrical components: flameproof design; Seals: FKM (Viton)

1. High-pressure impact causes diaphragm fatigue and damage; 2. Corrosive media (hydrogen sulfide, carbon dioxide) lead to housing corrosion.

1. Set the pressure control range within the sensing element’s rated limit; avoid overpressure impact; 2. For sour gas wells, conduct corrosion inspection every 6 months; apply anti-corrosion coating to external surfaces.

4

Driller's Control Cabinet/Auxiliary Driller's Control Cabinet

A7-3136-4021

Cabinet body: carbon steel (powder-coated); Control panel: aluminum alloy; Internal circuit board: FR-4 epoxy resin; Seals: EPDM rubber

1. Oilfield dust and moisture ingress cause circuit board short circuits; 2. Electromagnetic interference from drilling equipment affects signal transmission accuracy.

1. Keep the cabinet door closed tightly during operation; clean the air filter (if equipped) monthly; 2. Ensure the cabinet is properly grounded to reduce electromagnetic interference; avoid installing near high-power electrical equipment.