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Loadingin..3 philipwilliams87
01 Drawworks.ppt-rev 1.ppt
+ Record the date of the last overhaul (API RP.
Ft 4.2)? brawworks Inapection ental
+ Check NDT inspection reports for the (brake
bands, linkage and equalizer bar) 1.1
+ Check wear reports for brake bands, brake
pads and brake rims (FADC Drilling manual,
Chapter F)
‘Draveworks brake rim measurement
+ Check wear on the brake linkage; look for
kicking brake
+ Check wear on drill line / LeBus groove wear
+ Ensure at least 12 wraps on brake drum (with
travelling block in lowest position)
+ Check the drill line clamp on dead end of wire
behind the brake rim flange.
+ Isthere enough spare drill line for the
contract?
+ Check kickback roller setting (1/4-Inch play)
22
+ Carry out a cathead pull test: make-up 7,000
Ibs, break-out cathead 14,000 Ibs minimum
+ Check the break-out line condition
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01 Drawworks pptrev ‘ppt
‘Check make-up chain condition. (Link
wear 10% max)
Check oil pressure gauge operation,
Pressure 20/50 psi (National
drawworks)
Check for monthly oil samples analysis.
Check the oil sprayer nozzles are not
blocked
Check if silicone sealant is used as
gasket material on covers.
Check chain stretch: 3% maximum
stretch over 5 links.
(API Spec 7F - A.3.5)
Chain Stretch and sprockets
‘Chain measurement
‘Check for wear on sprockets.
(APT Spec 7F~ 8.3.4 -A.3.5)
Sprocket wear / Sprocket Drawing
Carry out a function test of the Crown-
0-Matic or equivalent system
Check disc brakes for wear and cracks,
check manual for wear rates.
Check the disc brake hydraulic system,
check manual for correct operating
Pressures.
Check the brake pads on the Emergency
brake, Parking brake and Main brake.
Check the Ex rating of DC electric
motors when inside hazardous area.
Check the electric cables (API RP 14F ~
12.1.2) Cable support and Junction-
boxes EX 1.3
Is there sufficient cooling water
capacity for the brake bands and eddy
current brake? (150 us gals/min)
(870Ltr/min).
Is there sufficient cooling for disc
brakes (Le. 195 gal/min) (740Ltr). (*)
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