How to Choose the Right Mud Pump Liner Size for F-1300 Pumps

How to Choose the Right Mud Pump Liner Size for F-1300 Pumps

For an F-1300 triplex mud pump rated at 1,300 HP (970 kW), liner diameters range from 170 mm (6.7 in) to 220 mm (8.7 in) in 10 mm increments. The standard liner selection rule is: use the largest diameter liner that keeps discharge pressure below the fluid end's rated working pressure (typically 34.5 MPa / 5,000 psi for standard F-1300 fluid ends). For a given flow requirement, smaller liners produce higher pressure at lower volume; larger liners do the opposite.

What Are the Available Liner Sizes for F-1300 Pumps?

• 220 mm (8.66 in): Max flow ≈ 2,150 L/min (568 GPM) at 120 SPM, max pressure ≈ 21.5 MPa (3,120 psi)
• 200 mm (7.87 in): Max flow ≈ 1,880 L/min (497 GPM) at 120 SPM, max pressure ≈ 27.0 MPa (3,915 psi)
• 180 mm (7.09 in): Max flow ≈ 1,520 L/min (401 GPM) at 120 SPM, max pressure ≈ 33.5 MPa (4,860 psi)
• 170 mm (6.69 in): Max flow ≈ 1,355 L/min (358 GPM) at 120 SPM, max pressure ≈ 34.5 MPa (5,000 psi) — pressure-limited

Which Liner Size Should You Use for Different Drilling Stages?

• Surface hole (0–1,500m): Use 220 mm liner. Surface sections typically need high flow rates (1,800–2,200 L/min) for adequate annular velocity and hole cleaning. Pressure requirements are low (under 15 MPa).
• Intermediate section (1,500–3,500m): Drop to 200 mm liner. Flow needs decrease to 1,500–1,800 L/min, while pressure rises to 15–25 MPa. The 200 mm liner provides optimal matching.
• Production section (3,500m+): Switch to 180 mm or 170 mm liner. High mud weight (1.8–2.2 SG) and small annulus require 25–34 MPa pressure. Flow rate drops to 1,000–1,500 L/min.
• Cementing operations: Use 180 mm liner for balanced displacement — high enough flow for turbulent displacement while remaining within casing pressure limits.

How to Calculate the Correct Liner Size?

Use this formula: Liner ID (mm) = 2 × √(Flow rate (L/min) / (π × Stroke length (mm) × SPM × 0.75 × 0.001)). The 0.75 factor accounts for triplex pump volumetric efficiency (75–78% for new liners, 70–72% near replacement). For example: at 1,600 L/min, 305 mm stroke, 120 SPM = 2 × √(1600 / (3.14159 × 305 × 120 × 0.75 × 0.001)) ≈ 190 mm — so use the closest standard (200 mm).

What Is the Difference Between Standard and Thick-Wall Liners?

Standard F-1300 mud pump liners have approximately 8–10 mm wall thickness and are suitable for operating pressures up to rated spec. Thick-wall (sometimes called "high-pressure") liners add 3–5 mm to the wall, enabling operation at 10–15% higher pressure but reducing internal diameter by one liner size step. For example, a thick-wall 200 mm liner has the same OD as a standard 200 mm liner but a 190 mm bore, effectively behaving as one size smaller. These are preferred for extended deep-section drilling where pressure margins are tight.

When Should You Replace F-1300 Mud Pump Liners?

Replace liners when the internal bore wear exceeds 2.5 mm over nominal diameter (API 8A recommendation). A 200 mm liner should be replaced when the bore reaches 202.5 mm. In typical operations, this occurs every 1,000–1,500 running hours depending on mud properties and sand content. The cost of a standard API 8A F-1300 mud pump liner set (3 pieces) ranges from USD 2,400–3,600 EXW China.

Contact OUSUN for F-1300 Mud Pump Liners & Spare Parts

OUSUN manufactures API 8A-compliant F-1300 mud pump liners in all standard sizes (170–220 mm) at our Guanghan facility near Honghua in Sichuan, China. All liners are furnace-brazed dual-wall construction with hardened internal surfaces (58+ HRC). Contact Ms. Suzy at [email protected] or WhatsApp +86 17738334931 for bulk pricing and lead times.