Westco 4500 - M;S Manual Back-Up Accessory Illustration-069 Westco Manual Back-Up Assembly

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M/S MANUAL BACK-UP ACCESSORY

ILLUSTRATION-069

WESTCO MANUAL BACK-UP ASSEMBLY

1. Install manual back-up hanger assembly on tong, insuring that leveling adjustment bolt is to the

rear of the tong.

2. Install back-up tool in hanger assembly, place pin and safety clip in lever to secure assembly.

3. To set manual back up for breakout, the lug jaw assembly (Ref. 422) must be positioned on right

hand side of back up.

4. To operate back up, position the tong on pipe so that the lug jaw system is gripping. Using both

hands, install lever latch in lug jaw assembly in a position to grip tubing coupling. Firmly hold

lever latch with one hand, using opposite hand to operate tong throttle. Break out joint, push on

lever latch to release.

5. For make-up of tubing, remove lever latch assembly from hanger assembly. Reposition and

install so that lug jaw is on left hand side. Position the tong on tubing and grip pipe with jaw

system. Install lever latch in lug jaw so that back up will grip on upset below coupling. This will

ensure that the coupling is made-up to proper torque.

a. To prevent injury, always grip lever latch loosely with palm of hand. Lever latch and lug jaw

may become separated if not fully engaged on teeth of lug jaw when torque is applied to

tubing.

b. Westco recommends that the back-up tong be used only when necessary. This will minimize

wear and reduce labor.

BACK-UP USAGE

The back up should be used during the following conditions:

1. When pulling tubing out of the well and the coupling unscrews from pin on tubing in the well.

2. When weight of pipe becomes light enough to allow pipe to rotate in slips.

3. When running tubing in well until load is significant to prevent tubing from rotating in the slips.

To prevent rotating, secure tubing spider to wellhead.

NOTE: When running tubing in the hole, back up must be used: 1. On the upset below the tubing

coupling to insure proper make-up of coupling. 2. To prevent string from turning in the slips. 3. To

ensure the make-up of both threaded connections.