BEARINGS FOR THE OIL & GAS INDUSTRY
BEARINGS FOR THE OIL & GAS INDUSTRY
Constant Velocity Joints by NTN
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Oil & Gas Bearings for Strategic Applications


Bearing Solutions for Drilling & Refining


NTN bearings are used in all sorts of machinery needed in the oil and gas industry from pumps and compressors, to valves and motors used for the extraction, refining, transport and storage of oil and natural gas. 

The demands on the machinery used for oil and gas exploration and extraction are challenging. High speed turbomachinery such as compressors and turbines can place enormous stresses on bearings. NTN’s thrust and journal bearings were developed in direct response to the need for increasingly faster speed ranges and higher load capacity for this industry.

Bearings for Drilling Rigs (Upstream)


Land based and offshore drilling rigs have similar elements as they are related to the same bearing applications. The infrastructure will vary to suit the environment.

The size of the rig and its components are directly proportional to the depth of the well.

Tapered Roller Bearings


 

 • NTN’s Optimized roller crowning, special heat treatment and super-finished rollers and raceways improve bearing life, running accuracy and load ratings.

• The quality of our steel: only premium quality is retained.

• Under extreme conditions, impacts and heavy loads, case-hardened steel shows a 40% increase in service life when compared with through-hardened steel. It can also withstand radial loads due to a high contact angle.

• Optimum static and dynamic capacities (ex. by increasing the number and the size of rollers)

• Controlled internal geometry by roller/rib contact optimization

• Applications: Top Drive, Swivel and Mud pumps

Ball Bearings


 

 • Japanese manufacturing style (premium quality)

• CM clearance as standard range. Reduced clearance to improve performance

• Shield and sealed performance: ZZ, LLU, LLB

• Applications: Draw works

Spherical Roller Thrust Bearings


 

 • Very high axial load capacity

• Can also withstand radial loads due to a high contact angle

• Can withstand 2° to 3° of misalignment

• Applications: Top Drive

ULTAGE® Spherical Roller Bearings


 

 • Designed to withstand large radial loads, shock loading and vibration

• Capable of up to 2° of misalignment

• Available NTN-SNR E-type series for extreme loads and long life

• Applications: Rotary table, Draw works, Mud pump

Cylindrical Roller Bearings


 

 • Widest selection of CRBs on the market

• Capable of large radial loads at relatively high speeds

• Metric, inch, ISO, and ABMA series available

• All NTN ABMA series cylindrical roller bearings use shock resistant, longer life, case hardened material

• Applications: Top drive, Swivel & rotary table, Draw works, Mud pump

Double Row Tapered Roller Bearings


 

 • NTN manufactures a large range of TNASWE type TRBs used in crown and traveling block sheaves.

• For years, we have been an OE/AM supplier to oilfields in these applications.

• Applications: Crown block & sheave, Traveling block

Tapered Roller Thrust Bearings


 

• Extremely high axial load capacity

• Commonly used in oilfield applications to handle extreme thrust load

• Available in shock resistant, longer life, case hardened material

• Applications: Top drive, Swivel

Bearings for Refining Pumps (Downstream)


Pumps and compressors are typical applications from the refining stage. Bearings used correspond to specific standards.

API610 

The standard for petroleum refining process pump defined by American Petroleum Institute. The conditions for use and specification of bearings are defined

BEARING LIFEBearing “system” life (not for individual bearings) should be
• over 25000h (Continuous operations)
• 16000h (Maximum radial and axial loads and rated speed)
ROTATIONdm N<500,000
dm [mm]...(bore diameter + Outer diameter )/2
N [min-1]...Rotational speed
LUBRICATIONOil lubrication
* The housing shall be equipped with an oil leveler.

 

Deep Groove Ball Bearings


 

• Radial clearance : C3 (Larger than normal clearance)

• Metal cage

Angular Contact Ball Bearings


 

• Contact angle 40°(For axial load)

• Arrangement: back to back

• Machined brass cage

Bearings for Air Compressors (Downstream)


Pumps and compressors are typical applications from the refining stage. Bearings used correspond to specific standards.

THE BEARING SPECIFICATION FOR SCREW COMPRESSOR

Used PlaceDischarge side (Fixed)Intake side (Floating)
Bearing typeAngular Contact Ball BearingCylindrical Roller BearingCylindrical Roller Bearing
Example of bearing number7304BT2PXn
(ID 20mm)
NF2304ET2XCSnPXn
(ID 20mm)
NU213ET2XCSnPXn
(ID 65mm)
Precision class of JIS(*)0-class0-class0-class
Contact degree40-degree--
CageMaterial: Polyamide
Guided by ball
Material: Polyamide
Guided by roller
Material: Polyamide
Guided by roller
LubricationCirculating oilingCirculating oilingCirculating oiling
Clearance-SpecialSpecial
Another specialtyControl of side face height difference of inner and outer ringControl of side face height difference of inner and outer ring-
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