Master Bushing
Master bushing is casted with high-quality alloy steel as per API 7K Spec. Two kinds of master bushing are available: pin drive and square drive. The size range of master bushing is from17-1/2" to 37-1/2".
Roller Kelly Bushing
Roller Kelly Bushings are used for 17-1/2" to 49-1/2" rotary tables. Jereh Drilltech provides API 7K certified roller Kelly bushings. Three types of bushing are available: heavy, medium, light-duty.
CB, CU, CUL Casing Bushing
Casing bushing is combined by bushing body and insert bowls. It is suitable for handling casing less than 30". There are two types: solid bushing and split bushing. CU and CUL are solid bushing, and CB is split bushing.
Master Bushing Accessories
Bit breaker adapter plates are located in the master bushing drive pin holes and provide a 13-9/16" square to accommodate bit breakers.
Lifting sling for removing and installing master bushings and insert bowls with hooks.
Technical Specification for Master Bushing
|
Master Bushing Type
|
Rotary Table Size (in)
|
Handling Tubular O.D.(in)
|
|
MSS
|
Square Driving-Split
|
17-1/2(18)
|
2-3/8~8-5/8
|
|
20-1/2
|
|
23
|
|
27-1/2
|
|
Square Driving-Integral
|
17-1/2(18)
|
|
20-1/2
|
|
22
|
|
23
|
|
27-1/2
|
2-3/8~10-3/4
|
|
MSPC
|
Pin Driving-integral
|
20-1/2
|
2-3/8~8-5/8
|
|
23
|
|
27-1/2
|
|
MDSP
|
Pin Driving-split
|
17-1/2
|
2-3/8~8-5/8
|
|
18
|
|
20-1/2
|
|
MSP
|
Pin Driving-split
|
23
|
2-3/8~8-5/8
|
|
27-1/2
|
|
MPCH
|
Pin Driving
|
37-1/2
|
2-3/8~13-3/8
|
Technical Specification for Roller Kelly Bushing
|
Bushing Model
|
Bushing Type
|
Way of Drive
|
Square(in)
|
Hex(in)
|
|
HDS
|
Heavy
|
Square Drive
|
3~6
|
3~6
|
|
27-HDP
|
Pin Drive
|
3~6
|
3~6
|
|
20-HDP
|
Pin Drive
|
3~6
|
3~6
|
|
RTM4
|
Medium
|
Square Drive
|
2-1/2~5-1/4
|
3~4-1/4
|
|
20-MDP
|
Pin Drive
|
2-1/2~4-1/4
|
3~4-1/4
|
|
17-MDP
|
Pin Drive
|
2-1/2~4-1/4
|
3~4-1/4
|
|
RTS4
|
Light-duty
|
Square Drive
|
2-1/2~4-1/4
|
3~4-1/4
|
Technical Specification for Casing Bushing
|
Rotary Table
|
Casing (in)
|
|
Model
|
2-3/8~8-5/8
|
9-5/8~10-3/4
|
11-3/4~13-3/8
|
16
|
18-5/8-20
|
24
|
26
|
30
|
|
17-1/2~
20-1/2
|
CU
|
Body:3102
Insert bowl:1809
|
Body:3102
Insert bowl:1902
|
Body:3102
|
-
|
-
|
-
|
-
|
-
|
|
27-1/2
|
CUL
|
Body: 3103+3105
Insert bowl:1809
|
Body: 3103+3105
Insert bowl:1902
|
Body: 3103+3105
|
Body: 3103+3105
|
Body:3103
|
-
|
-
|
-
|
|
37-1/2
|
CB
|
Body:6695+6126A
Insert bowl:6115
|
Body:6695+6126A
Insert bowl:6114
|
Body:6695
Insert bowl:6126A
|
Body:6695
Insert bowl:6127
|
Body: 6195
|
-
|
-
|
-
|
|
Body: 20+6126A
Insert bowl:6115
|
Body: 20+6126A
Insert bowl:6114
|
Body: 20
Insert bowl:6126A
|
Body: 20
Insert bowl:6127
|
Body: 20
|
Body:24
|
Body:26
|
Body:30
|
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