LUOYANG MONTON BEARING SCIENCE & TECHNOLOGY CO.,LTD.
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128713K 65X128X351.5mm DOWNHOLE DRILLING MOTOR BEARINGS

128713K 65X128X351.5mm DOWNHOLE DRILLING MOTOR BEARINGS

Reference FOB Price:
US10 ~ 1000 / Piece
Min. Order:
1 Piece
Stock:
100 Piece
Production Capacity:
luoyang
Port:
Shanghai
Payment term:
T/T
Delivery time:
Stock
Technical Parameters:
Product Designations:
128713K
Old Designations:
128713K
HS Code:
84829000.00
Structure:
No-Sealed
Number of Rows:
multi-row
Inside Diameter:
65 mm
Outside Diameter:
128 mm
Thickness:
351.5 mm
Weight:
15 KG
Dynamic load Capacity, Radial (Cr):
1300
Static load Capacity, Radial (Cor):
2000
Reference speed (Grease rpm):
10000
Limiting speed (Oil rpm):
10000
Demensions:
65X128X351.5mm
Brand:
Monton
Radial Clearance Trade No.:
C0
Precision Rating:
P6 P0
Vibration:
Z1V1
Load Direction:
Axial
Bearing Material:
GCr15
Cage Type:
brass
Cage material:
GCr15
Seals Type:
no seals
Seal Material:
GCr15
Number of Balls:
25
Ball Material:
GCr15
Roller Material:
GCr15
Contact Angle:
15°
Transport Package:
wooden case
Shipping Ways:
ocean,sea
Country of Origin:
China
Service:
Good
Quality Control:
Third party/Self-control
Feature:
balls
Gear Options:
no gear
Application:
Downhole Drill Motors
128713K 65X128X351.5mm DOWNHOLE DRILLING MOTOR BEARINGS

 128713K 65X128X351.5mm DOWNHOLE DRILLING MOTOR BEARINGS

Bearings Dimensions Loading Weight
ISO d D B Dyn C stat  C0 kg
mm mm mm KN KN KG
128713K 65 128 351.5 199.1 169.6 24.2

 

 

 

 

Down hole motor or drilling motor for the oil drilling industry

Bearing Assembly of Downhole Motor is used to transmit motor rotary dynamic force to the bit, meanwhile to withstand axial and radial load from drilling weight. Inside of the Bearing Assembly,Monton uses TC Radial Bearing and a stacked thrust bearings. The thrust bearings support the downward force resulting from the “weight on bit” (WOB) and the loads from the combination of hydraulic thrust and weight loads from internal components.Monton provides different bearing assemblies, designed to meet the diverse requirements of the drilling industry.

Mud Motor Radial Bearing

 A mud motor bearing assembly, comprising: a stationary housing having an inner wall surface defining an interior bore; a rotatable drive shaft extending through the interior bore of the stationary housing, the rotatable drive shaft having a tubular drive shaft with a uniform outer diameter terminating at an outlet section with an enlarged outer diameter, the rotatable drive shaft including an inner bore for passage of a drilling fluid; a bearing section bearing a radial load and an axial load, the bearing section including at least a pair of stationary bearing rings and at least a pair of rotating bearing rings in stacked arrangement, each of the stationary bearing rings having an inner periphery and an outer periphery, the outer periphery of each of the stationary bearing rings operatively engaged to the inner wall of the stationary housing, the inner periphery of each of the stationary bearing rings including a projection, each of the rotating bearing rings having an inner periphery and an outer periphery, the inner periphery of each of the rotating bearing rings operatively engaged to the tubular drive shaft, the outer periphery of each of the rotating bearing rings including a projection, the projections of the pair of stationary bearing rings forming a recess that accommodates the projection of one of the pair of rotating bearing rings in sliding engagement; wherein the stacked arrangement alternates between at least partially overlapping stationary bearing rings and rotating bearing rings. 

Mud motor bearings

 

Mud motor bearings, or ball bearings have conventionally been used to react thrust, or axial, loads in down hole mud motors. When low rpm power sections are used in the application such bearings provide sufficient life and reliability. However, bearing component fatigue causes life to decrease linearly as speed increases. This fatigue makes ball bearings unsuitable for high rpm motors. Standard engineering practice dictates that ball bearings are specified according to L10 life, or the number of revolutions a group of identical bearings is expected to sustain before 10% fail. As revolutions are related to speed, bearings operating in a higher speed motor will fail before those operating in a low speed motor, e.g. one could roughly expect a 90% reduction in bearing life if speed was increased from 100 to 1000 rpm. In addition to life, friction and horsepower losses are often of interest in drilling. Ball bearings are referred to as frictionless bearings due to the rolling nature of the elements, however in practice frictional losses exist due to rolling resistance and sliding. An order of magnitude approximation of the coefficient of friction (cof) for an angular contact bearing operating in ideal non-abrasive lubricant conditions is 0.0032.1 In drilling mud, the cof can be assumed to be significantly higher.


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