Hoisting System & Rotary Equipments Main Parts

1

Traveling Block conform to API - 8A (YC-450)

High-strength alloy steel (40CrNiMoA) for sheaves; forged steel for frame; anti-corrosion treated (sandblasting + epoxy coating) per ISO 12944-2.

1. Sheave groove wear from drilling line friction; 2. Bearing damage from insufficient lubrication; 3. Frame fatigue from uneven load distribution.

1. Inspect sheave groove wear monthly (replace if depth exceeds 1.5mm); 2. Lubricate bearings with high-pressure grease per API-8A guidelines; 3. Ensure balanced load during hoisting to avoid stress concentration.

2

Hook conform to API -8A(DG-450)

Forged alloy steel (20Mn2) with quenching-tempering treatment; alloy steel bearing; corrosion-resistant plating on the hook body.

1. Hook throat wear from long-term load contact; 2. Fatigue cracks from repeated load cycles; 3. Bearing jamming due to dust and debris.

1. Conduct non-destructive testing (NDT) quarterly per API-8A; 2. Clean hook throat and bearing weekly to remove debris; 3. Never exceed rated load (marked on the hook body).

3

Dead line anchor

Low-alloy structural steel (Q355B) for the main body; high-strength steel for connecting parts; hot-dip galvanized for corrosion resistance.

1. Structural deformation from excessive tension; 2. Corrosion from on-site humidity and drilling fluid; 3. Connection part wear from vibration.

1. Inspect tension level regularly to match drilling line specs; 2. Reapply anti-corrosion coating annually; 3. Tighten connecting fasteners monthly and replace if thread wear is found.

4

Drilling Line

High-carbon steel wire (65Mn) with galvanized surface; multi-strand twisted structure for tensile strength, compliant with API-9A.

1. Abrasion from contact with sheaves and hooks; 2. Fatigue breakage from repeated bending; 3. Corrosion from moisture and chemical contaminants.

1. Rotate drilling line regularly to distribute wear evenly; 2. Clean and lubricate with wire rope grease weekly; 3. Replace if broken strands exceed 3 in a single lay (per API-9A).

5

DH4500 Elevator Link

Alloy steel (35CrMoA) with heat treatment; precision-machined contact surfaces; anti-rust oil coating for storage and use.

1. Contact surface wear from elevator and tool interaction; 2. Fatigue cracks from heavy load cycles; 3. Deformation from improper alignment during lifting.

1. Inspect contact surfaces for wear weekly; 2. Ensure alignment with elevators before loading; 3. Conduct NDT semi-annually to detect hidden cracks.

1

Swivel conform to API-8A (SL-450)

Forged steel (A105) for the main body; tungsten carbide for seals; high-temperature resistant bearing steel for rotating parts.

1. Seal leakage from wear and high-pressure fluid erosion; 2. Bearing damage from insufficient lubrication; 3. Corrosion from drilling mud intrusion.

1. Check seal integrity and fluid leakage daily; 2. Lubricate bearings with high-temperature grease per manufacturer specs; 3. Clean external surfaces regularly to prevent mud intrusion.

2

Electric drill spooler (1-1/2", 1200meter)

Carbon steel (Q235A) for the frame; cast iron (HT200) for the spool; copper alloy for electrical components; anti-corrosion coating for metal parts.

1. Spool wear from drilling line friction; 2. Electrical component failure from on-site dust and moisture; 3. Gear jamming due to insufficient lubrication.

1. Ensure uniform winding of drilling line to avoid uneven wear; 2. Keep electrical components sealed to prevent dust/moisture damage; 3. Lubricate gears monthly with industrial gear oil.

Why must these parts comply with API-8A standards?

API-8A specifies safety and performance requirements for hoisting/rotary equipment in oil drilling. Compliance ensures parts can withstand extreme loads, reduces failure risks, and meets global drilling safety regulations, avoiding on-site accidents.

How often should the Swivel (SL-450) seals be replaced?

Replace seals every 6 months under normal use; replace immediately if leakage is detected. For high-pressure drilling scenarios, shorten the replacement cycle to 3 months, per API-8A maintenance guidelines.