Canrig top drive bulletin

Model: 175T, 275T, 350T, 500T Serial #: All

Mar. 17, 2015

Product Bulletin # TDS-147

Split Ring Upgrade Canrig has an alternate design for the 5000 psi, 3" bore mudline split ring used in the 175, 275, 350, and 500T top drives. The new design can replace the existing split ring and will allow for secondary retention of the mounting bolts by b y eliminating the counterbore and allowing access a ccess to the bolt heads.

Figure 1: Exist xisting Design

Figure igure 2: New Design Design (With Counterbores Counterbores removed emoved))

Current Split Ring Part Number: DT11361

New Split Ring Part Number: DT22311

The new design will require different hardware for installation due to the removed counterbores. Kits have been created to supply the necessary component, which include: •

Split Ring

•

Capscrews

•

Lockwashers

•

Safety Wire

•

Ferrules

Top Drive Model

Split plit Ring Kit Part Number

175T, 350T, 500T

AY21894

275T

AY21895

RigLine 24/7™ Support Line: 866.433.4345 | International: +1 281.774.5649 | Fax: 281.774.1940 | E-mail: [email protected] Document ID 15-037 v 1.0 | Copyright © 2015 Canrig Drilling Technology Ltd. All rights reserved. 1 of 3


Mar. 17, 2015

For proper installation, please ensure the following: 1.

Orient the split in the split ring so that the joint is at 90º to the direction that the mudline points.

SPLIT RING

MUDLINE

90°

Figure 3: Split Ring Orientation 2. Apply Loctite 242 threadlocker to capscrews.



Mar. 17, 2015

3. Following the torque sequence indicated in Figure 4, torque the capscrews in two passes. In the first pass, apply 100 ft-lb torque to the capscrews. In the second pass, apply 350 ft-lb of torque. See Canrig ENG 725.

1

4

12

7

9

10

6

2

5

3 11

8

Figure 4: Torque Sequence 4. Apply secondary retention to capscrews per Canrig ENG 701. See Figure 5.

Figure 5: Secondary Wiring Retention


Canrig top drive bulletin

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