Blohm + Voss Oil Tools 9G-3570AIR, Technical Documentation Manual

Page: 13 / 71

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13
Hanging the Spinner
The GrayChain 3570 should be hung using a wire rope that is ½” or greater and that is in
accordance with acceptable practices. Attach the wire rope through the shackle at the top
of the spring hanger assembly.
Use of the GrayChain 3570 without the spring hanger assembly will shorten the life of the
tool and cause improper operation which may lead to accidents. Disregard if there is a
counterbalance in use.
The position of the spinner should be located between the rotary table and drawworks
(toward the off-driller side) about four feet back from the center of the rotary table. It should
hang four to five feet above the floor as to contact the drill pipe and not the tool joint. The
spinner should be easily pulled on and off the drill pipe and be completely out of the way
when not in use.
The GrayChain 3570 will rotate drill pipe in
both directions and consequently swing in
either direction. The GrayChain 3570 must
be equipped with two backup lines. These
two backup lines or cables need to be
attached to derrick legs or a comparable
structure. Attachment should be made
so that the swinging movement of the
spinner is restricted to less than 1’ in either
direction.
Attaching to the Mast
Using a ½” hang-off cable attached to the
mast (as high as possible) will allow an easy
free swing around the wellbore. The higher
up the fixed line is, the easier it will be to
maneuver the GrayChain 3570 to its desired
location.
Attaching the Fixed Line
Use a cross member to attach the fixed line to position the hang-off
cable about
2
’ to
3
’ from the pipe centerline. Across from the driller is where the GrayChain
3570 should be positioned.
WARNING: THE USE OF ONLY ONE BACKUP LINE CAN CAUSE
THE SPINNER TO SWING INTO THE OPERATOR OR FLOOR
PERSONNEL AND WILL CAUSE INJURY. USE TWO BACKUP
CABLES!
WARNING: CHECK ALL SPRING HANGER ASSEMBLY
SHACKLES AND LOCK COTTER PINS FOR TIGHTNESS.
WARNING: CHECK SPRING SAFETY CABLES FOR
SOUNDNESS, (TWO REQUIRED). THE SPRING HANGER
ASSEMBLY IS NECESSARY TO ALLOW THE SPINNER TO RISE
AND FALL WITH THREADED TOOL JOINT MOVEMENTS
Figure 2