HTD-250/CR Drillmec Top Drive Annual Maintenance Spare Parts

Introduction

This comprehensive spare parts lineup is precision-engineered exclusively for the HTD-250/CR Drillmec top drive system, a heavy-duty top drive drilling unit widely deployed in onshore exploration rigs, offshore workover platforms, and directional drilling operations. Target users include drilling rig maintenance supervisors, top drive service technicians, rig asset procurement specialists, and drilling operations managers who prioritize zero unplanned downtime, strict compliance with API 8C and API 7K standards, and seamless annual preventive maintenance execution.

Key Operational Pain Points Addressed

• Costly Drilling Downtime: Unplanned HTD-250/CR top drive failures from worn seals, damaged brake components, or faulty hydraulic parts can halt drilling for 6–10 hours, resulting in direct daily losses exceeding $42,000 for active rig sites, plus delays to well construction timelines.
• Fluid Leakage & Safety Hazards: Deteriorated O-rings, packing devices, and piston seals cause hydraulic fluid and drilling mud leaks, creating slippery work surfaces, environmental compliance risks, and violations of rig safety protocols.
• Premature Wear & Frequent Repairs: Substandard aftermarket parts degrade rapidly under high vibration, high torque, and abrasive drilling conditions, cutting component lifespan by 45% and inflating long-term maintenance costs.
• System Misalignment & Malfunction: Worn bushings, bearings, and shear pins lead to misalignment in brake assemblies, hydraulic vises, and swivel hooks, causing erratic operation, damaged drilling tools, and unexpected equipment trips.

Functional Description

These components support all core systems of the HTD-250/CR top drive, with key functions including:

• Flushing Pipe Assembly: Flushing pipes, packing devices, and sealing kits prevent mud leakage and maintain fluid circulation during drilling operations.
• Brake & Limiter Systems: Brake pistons, discs, shear pins, and self-locking nuts ensure reliable torque holding and emergency stop functionality.
• Hydraulic Vise & Handling Components: Jaws, guides, bushings, and springs deliver secure pipe gripping and precise tubular handling.
• Hydraulic & Filtration Systems: Proportional valves, filters, and pressure switches regulate hydraulic flow and maintain fluid cleanliness for consistent performance.
• Swivel & Hook Assemblies: Bearings, pads, and sensors ensure smooth rotation and safe load handling for drilling tubulars.

Structural & Material Characteristics

• Wear Components: Hardened steel brake discs, wear-resistant pads, and precision-machined bushings rated for 12,000+ operating hours under heavy torque.
• Sealing Components: High-pressure nitrile rubber O-rings and packing sets designed to withstand 400 bar hydraulic pressure and mud contamination.
• Hydraulic Components: OEM-spec proportional valves and filters with high filtration efficiency (25 micron, BETA>200) to protect hydraulic pumps and motors.

Applicable Operating Conditions

• Applicable Equipment: HTD-250/CR Drillmec Top Drive System
• Hydraulic Operating Pressure: Up to 400 bar
• Temperature Range: -22°F (-30°C) to 140°F (60°C)
• Application Scenarios: Onshore drilling rigs, offshore workover platforms, directional drilling, well intervention operations
• Standards Compliance: API 8C, API 7K, ISO 13732 (drilling equipment standards)

Maintenance & Service Recommendations

1. Complete full annual maintenance every 12 months or 8,000 drilling hours, replacing all wear components and seals in this kit to prevent failures.
2. Lubricate bearings, bushings, and lubrication nipples every 50 operating hours with high-temperature drilling grease to reduce friction.
3. Inspect hydraulic filters monthly, replacing clogged filters immediately to protect hydraulic pumps and valves.
4. Check shear pins and brake components quarterly for wear or damage, replacing worn parts to maintain safe braking performance.
5. Calibrate pressure switches and sensors annually to ensure accurate system monitoring and compliance with operational parameters.
6. Store spare parts in a dry, dust-controlled environment to prevent seal hardening, corrosion, and component degradation.

We supply the following spare parts:

№ n/a	Name	Units of measurement	Code OK RB
1.    1	Flushing pipe	PCS.	28.92.61.300
2.    2	Packing device	PCS.	28.92.61.300
3.    3	Packaging of the flushing pipe (a set of seals)	K-T.	28.92.61.300
4.    4	Locking ring	PCS.	28.92.61.300
5.    5	Lubrication nipple	PCS.	28.92.61.300
6.    6	O-ring	PCS.	28.92.61.300
7.    7	Shear pin	PCS.	28.92.61.300
8.    8	Self-locking nut	PCS.	28.92.61.300
9.    9	Cylinder	PCS.	28.92.61.300
10. 10	Lubrication nipple	PCS.	28.92.61.300
11. 11	Brake piston	PCS.	28.92.61.300
12. 12	Brake disc	PCS.	28.92.61.300
13. 13	Disc (crown lock)	PCS.	28.92.61.300
14. 14	Gasket (piston seal)	K-T	28.92.61.300
15. 15	Gasket (piston seal)	K-T	28.92.61.300
16. 16	Oil collector	PCS.	28.92.61.300
17. 17	Pad	PCS.	28.92.61.300
18. 18	Pad	PCS.	28.92.61.300
19. 19	Pad	PCS.	28.92.61.300
20. 20	Pad	PCS.	28.92.61.300
21. 21	Bearing	PCS.	28.92.61.300
22. 22	Kernel	PCS.	28.92.61.300
23. 23	The guide	PCS.	28.92.61.300
24. 24	The tool part of the sleeve	PCS.	28.92.61.300
25. 25	Sensor	PCS.	28.92.61.300
26. 26	Pad	PCS.	28.92.61.300
27. 27	O-ring	PCS.	28.92.61.300
28. 28	Ring	PCS.	28.92.61.300
29. 29	Pad	PCS.	28.92.61.300
30. 30	The guide	PCS.	28.92.61.300
31. 31	Pin	PCS.	28.92.61.300
32. 32	The plate	PCS.	28.92.61.300
33. 33	The plate	PCS.	28.92.61.300
34. 34	Spring	PCS.	28.92.61.300
35. 35	Bushing	PCS.	28.92.61.300
36. 36	Bushing	PCS.	28.92.61.300
37. 37	Pin (housing mounting)	PCS.	28.92.61.300
38. 38	Bushing	PCS.	28.92.61.300
39. 39	Spring	PCS.	28.92.61.300
40. 40	Jaw	PCS.	28.92.61.300
41. 41	Bushing	PCS.	28.92.61.300
42. 42	Rod (gripper piston rod)	PCS.	28.92.61.300
43. 43	Pad	PCS.	28.92.61.300
44. 44	Pad	PCS.	28.92.61.300
45. 45	Pad	PCS.	28.92.61.300
46. 46	Pad	PCS.	28.92.61.300
47. 47	Pad	PCS.	28.92.61.300
48. 48	Pad	PCS.	28.92.61.300
49. 49	Lubrication nipple	PCS.	28.92.61.300
50. 50	Pin	PCS.	28.92.61.300
51. 51	Cylinder (deflection of the slings)	PCS.	28.92.61.300
52. 52	Knee	PCS.	28.92.61.300
53. 53	Pad	PCS.	28.92.61.300
54. 54	Pad	PCS.	28.92.61.300
55. 55	Pad	PCS.	28.92.61.300
56. 56	Pad	PCS.	28.92.61.300
57. 57	Pad	PCS.	28.92.61.300
58. 58	Packing ring	PCS.	28.92.61.300
59. 59	Lubrication nipple	PCS.	28.92.61.300
60. 60	The tools of the internal preventer (ball valve)	PCS.	28.92.61.300
61. 61	Body	PCS.	28.92.61.300
62. 62	Lever	PCS.	28.92.61.300
63. 63	O-ring	PCS.	28.92.61.300
64. 64	O-ring	PCS.	28.92.61.300
65. 65	Packing ring	PCS.	28.92.61.300
66. 66	Lubrication nipple	PCS.	28.92.61.300
67. 67	Bearing (ball valve closure devices)	PCS.	28.92.61.300
68. 68	Idling roller pin	PCS.	28.92.61.300
69. 69	Insert	PCS.	28.92.61.300
70. 70	Lubrication nipple	PCS.	28.92.61.300
71. 71	Gripping plate 6.5/8″ (pipe clamp cracker)	PCS.	28.92.61.300
72. 72	The body of the jaw of the pipe clamp	PCS.	28.92.61.300
73. 73	Screw (fixing the crackers of the pipe clamp)	PCS.	28.92.61.300
74. 74	Valve	PCS.	28.92.61.300
75. 76	O-ring	PCS.	28.92.61.300
76. 77	Cardan	PCS.	28.92.61.300
77. 78	Elastic joint (damper coupling)	PCS.	28.92.61.300
78. 84	Screw	PCS.	28.92.61.300
79. 85	Screw	PCS.	28.92.61.300
80. 90	Screw	PCS.	28.92.61.300
81. 109	Quick-release socket sleeve	PCS.	28.92.61.300
82. 110	Quick-release pin bushing	PCS.	28.92.61.300
83	47250987	EX-17-3-C-16-321SN		PCS.		28.92.61.300
84	50800029 (alt. Number 50800028)	CA 140 140 (SAOVHC Special Index 15) – 178 2521 (HAGGLUNDS)		PCS.		28.92.61.300
85	50981195	CS150M60A(MP Filtri)		PCS.
86	50981162	MR6304A10(MP Filtri)		PCS.
87	50981159	HP3202A10ANP01 (MP Filtri)		PCS.
88	50981199	HC9400FKT13H (Pall Filtri)		PCS.
89	(50981124/50981212)	CS100A10A (MP Filtri)		PCS.
90	50851573	4VP01 50 G12 B1 C1 (S26-58322-G; Denison-Parker)		PCS.
91	RI5077HD00-173	517-00095-0 (denison)		PCS.
92	5070-0296	PLM30.61. Rev (Casapa)		PCS.
93	5077-0299	PV140.0.009.0020.0		PCS.
94	5070-0396	HDP30.51 (Casapa)		PCS.
95	5077-0229	P14P3L1A9A2B00 (Denison)		PCS.
96	4751-1530	SX18 (0..400 bar, Nuova fima)		PCS.
97	5085-1573	4VP01 50 G12 B1 C1 (S26-58322-G; Denison-Parker)		PCS.
98	4710-8338	8221-PL1-B (1.7-20 bar, Barksdale)		PCS.
99	4710-8277	KPS79 (Danfos) 060L3104		PCS.
100	4710-8339	8241-PL1-B-EXI(Barksdale)		PCS.
101	4710-8337	8221-PL1-B-EXI (1.7-20 bar Barksdale)		PCS.
102	4710-8339	8241-PL1-B-EXI(Barksdale)		PCS.
103	19816614			PCS.		28.92.61.300
104	19015836			PCS.		28.92.61.300
105	19816641			PCS.		28.92.61.300
106	19015836			PCS.		28.92.61.300

On-Site Fault Repair Cases (HTD-250/CR Drillmec Top Drive)

Case 1: Hydraulic Vise Gripping Failure

The HTD-250/CR top drive hydraulic vise failed to securely grip drilling tubulars, causing slippage during makeup. Inspection revealed worn jaws (19014296) and damaged guide bushings. Replacing the vise jaws and bushings from this maintenance kit restored secure gripping, resuming drilling operations within 2 hours.

Case 2: Flushing Pipe Mud Leakage

A severe mud leak developed at the flushing pipe assembly during drilling, traced to deteriorated packing devices (RI01895132-07) and O-rings. Installing new packing sets and sealing components eliminated leaks, restoring proper mud circulation and pressure control.

Case 3: Top Drive Brake Malfunction

The top drive brake system failed to hold torque, creating a safety hazard during tubular handling. Diagnostics showed worn brake pistons (18112837) and damaged brake discs. Replacing these brake components with OEM-matched parts restored full braking functionality and compliance with rig safety standards.

Frequently Asked Questions (FAQ)

Question	Answer
Are these parts fully compatible with the HTD-250/CR Drillmec top drive?	Yes, all components are manufactured to Drillmec’s original OEM specifications, with direct drop-in fitment for the HTD-250/CR top drive, no custom modifications or adjustments required.
Is this kit designed specifically for annual maintenance?	Absolutely, this parts list is curated to cover all wear-prone components needed for complete annual preventive maintenance of the HTD-250/CR top drive, reducing the risk of unplanned failures.
Do these parts meet API drilling equipment standards?	Yes, all components are designed and tested to meet API 8C and API 7K standards, ensuring full compliance with global drilling industry safety and performance requirements.

Procurement Guidance & Call to Action

This HTD-250/CR Drillmec top drive annual maintenance spare parts list is a definitive reference for planned preventive maintenance, emergency field repairs, and rig inventory stocking. Every component is engineered to match OEM quality, durability, and performance, ensuring reliable top drive operation, minimal downtime, and full compliance with industry safety standards.