Master Bushing
The master bushing is intended to work together with kelly bushing to drive drill string, and it is manufactured strictly following API Spec 7K, ISO9001:2008 and ISO14001:2004 standards.
Feature
1. Manufactured from alloy steel castings, our rotary table master bushing (including insert bowl) is available from 171/2to 371/2 inches.
2. According to its structure, our master bushing is divided into two types which are solid type and split type.
3. Based on drive method, our product is classified into pin drive master bushing and square drive master bushing, and it fits well for API rated rotary slip, casing slip, drill collar slip and kelly bushing.
Technical Data of Master Bushing| Product | Rotary table size (inch) | Insert bowl | Tubular OD (inch) |
| 171/2 | API bowl 1011 | 23/8-85/8 | |
| EXT. bowl 1024 | |||
| 201/2 | API bowl 1011 | 23/8-85/8 | |
| EXT. bowl 1024 | |||
| 271/2 | API bowl 1022 | 23/8-85/8 | |
| EXT. bowl 1025 | |||
| Insert bowl 1026 | 95/8-103/4 | ||
| 171/2 | EXT. No.3 taper | 23/8-85/8 | |
| 201/2 | EXT. No.3 taper | 23/8-85/8 | |
| 201/2 | EXT. bowl 1809 | 23/8-85/8 | |
| bowl 1902 | 95/8-103/4 | ||
| Body only 1805 | 113/4-133/8 | ||
| 271/2 | Bowl 1810 (No.3) | 23/8-85/8 | |
| Bowl 1904 (No.2) | 95/8-103/4 | ||
| Bowl 1903 (No.1) | 113/4-133/8 | ||
| 271/2 | EXT. No.3 taper | 23/8-85/8 | |
| 371/2 | Bowl 6608(No3) | 23/8-85/8 | |
| Bowl 6609 (No.2) | 95/8-103/4 | ||
| Bowl 6610 (No.1) | 113/4-133/8 |
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