DESCRIPTION
BG 25 / 2011 /
2254_BG25_en_0000498763_V01
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1.2.1.2 Components Description
Table Basic rig components description
Component
Description / Function
Boom
Is a movable link from the machine to the mast
pivot.
Boom cylinders
Are movable connections of the boom to the ma-
chine. They enable adjustment of the machine's
distance to the bore.
Swing mechanism
Enables rotation of the uppercarriage to both
sides.
Crawler drives
Drive the two crawlers forward and reverse.
Counterweights
Render stability to the equipment.
Main winch with main rope
Is used as a hoist for the Kelly.
Auxiliary winch with auxiliary rope
Is used for rigging operations and load handling.
Wedge
Allows changing the distance from mast to bore.
Kinematic triangle (H)
Enables parallel repositioning of the mast.
Mast (upper section / lower section) Provides guidance for the crowd sledge.
Mast prop
Supports the rig during withdrawal of the drilling
tool.
Mast pivot
Is a swivel link between the mast and the boom.
Masthead
Houses sheaves which guide ropes over the mast.
Mast extension (intermediate)
Enables use of longer drilling tools.
Mast extension (lower)
Allows the crowd sledge be positioned further down.
Backstay cylinders
Are movable supports of the mast. They raise and
lower the mast and allow adjustment of the inclina-
tion of the mast.
Uppercarriage
Houses the engine, hydraulic system and controls.
Rope swivel
Prevents rope twist.
Crowd rope tensioning cylinder (S)
Stresses the crowd ropes.
Supporting boom (H)
Enables parallel repositioning of the mast.
Supporting trestle (V)
Is a mount for the backstay cylinders.
Undercarriage
Carries the rig and moves it from one drilling spot
to the next.
Crowd sledge
Runs up and down the mast while carrying the ro-
tary drive and drilling tool.
Crowd ropes (upper / lower) (S)
Transfer force from crowd winch to crowd sledge.
Thrust rod (Z)
Is a distance keeper for the crowd cylinder.
Crowd winch (S)
Generates the crowd forces.
Crowd cylinder (Z)
Generates the crowd forces.
Z) for rig fitted with cylinder crowd
V) for mast lowering to the front
S) for rig fitted with rope crowd
H) for mast lowering to the rear