Tender Documents - Oil India Limited

Twin drum draw works having main drum lebus grooved for 1”
or 1.1/8” drilling line and 9.1/16” sand line drum.
Hydromatic Brake: Water-cooled Hydromatic brake, driven by
a twin-disc clutch with independent oil bath chain case to
serve as assist brake, with suitable capacity water tank, valves
and piping installed on the carrier. Disc brake [shaft mounted]
in lieu of hydromatic shall also be acceptable.
TWIN STOP DEVICE (CROWN & FLOOR SAVER): One (1)
pneumatically activated Twin-stop Device – Crown Saver to
prevent collision between traveling block assembly and the
crown block assembly, Floor Saver to prevent collision between
the traveling block assembly and the drill floor.
(b)
DRILLER’S CONSOLE: Driller‟s console, adjustable height, located at
the rear of the carrier incorporating all functions to carry out
workover operations smoothly. Additionally, following minimum
instruments should be mounted in suitable enclosure at Driller‟s
console arranged in such a manner to give clear view of each & every
gauge to Driller while operating the draw-works.
Weight Indicator, Martin Decker or equivalent make with
suitable sensator. Should be complete with 6 lines & 8 lines
dials for 1” or 1.1/8”. [Calibration certificate shall be provided]
Mud pressure gauges 0-10,000 PSI or 0-6,000 PSI. The mud
pressure gauge system should have one (1) gauge for standpipe
and one (1) for annulus pressure
Suitable recorder for recording hook load
SPM indicator for mud pump at driller‟s console
NOTE: Rig instrumentation should be suitable for Hazardous area
as per OMR-1984.
(c)
MAST:
Two-section Telescoping Mast manufactured & monogrammed
per API Spec 4F, with hydraulic mast tilting & extending
systems and automatic locking device to lock the mast into its
fully extended operating position.
Crown block assembly should be complete with sheaves for
cat-line, sand-line, sheave units for rig tongs, power tong/pipe
spinner.
Clear height (below crown) from the ground: Min. 102 ft, Max.
112 ft.
Static hook load capacity: Min. 250,000 lbs with 8 lines strung
Wind load resistance with full set back: Minimum 80 mph (128
kmph) with guy lines
Minimum 150 Ton (136 Tonnes) capacity Crown Block
Assembly with adequate no. of sheaves for stringing up 8 lines
Mast load & wind guy lines