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FORAGER CABLE PERCUSSION RIGS
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Rugged high quality UK made rigs with very low inputs - quick two man set-up and
operation; they cover the entire range of materials, with nothing extra to buy
if the ground is harder than you thought. Machines are permanent, long life and maintanable.
Designed and built in the UK for use world-wide.
At their heart is the engine & winch combination; we use our own highly successful
design of clutchless freefall drilling winch and good high torque engines, some with
heavy flywheels providing additional 'grunt'.
They are suitable equipment for contractors drilling for several purposes, and for NGOs producing typical
rural water wells. Faster and cheaper than hand digging for rural development
programmes - not stopped by boulders, and a profitable commercial investment for
drilling water wells, site investigations, window sampling, remediation wells and
other environmental drilling. Can be used for setting drive points, hydraulic
(jet) percussion drilling, peizometers & insitu testing, geothermal drilling, and
prospecting.
PERFORMANCE of drilling rigs is a combination of the machinery, tools
& equipment, materials to be drilled and operator skill. In suitable conditions
the Forager-55/1250 can provide boreholes with 8-inch casing to 15 metres; with 6-inch
casing to 30 metres and with 5-inch casing to 60 metres. Open hole drilling to 145 metres
has been achieved below 90 metres of 5-inch casing installed by jacking. Improved
performance can usually be obtained by using hydraulic jacks to advance casing,
rather than simple percussion. It is quicker than driving, can reach much greater
depths, and can be done while drilling continues uninterrupted. Bigger machines
in the range can be expected to improve on the above figures.
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The Standard Forager-55 rig weighs about 500 KG and when folded, can be towed by
a small car or pickup, and is easily towed off road in conditions, which would be
impossible with heavier machines.
The balance - with the weight of the tripod counter balanced by the engine and
winch means that it can be wheeled easily by hand between drilling sites. In very
difficult situations, the rig winch can be used to pull both it and a vehicle into
and out of a site or through streams.
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FREE-FALL WINCH up to 3000 Kg pull.
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The Consallen FREE-FALL WINCH is clutchless, and is controlled by two band brakes.
An epicyclic (planetary) gear train is mounted within the winch drum, the whole
being carried on self aligning bearings.
When hydraulically driven, the winch can be used in dual modes for controlled power
up and power down, while retaining the free-fall facility in the second mode.
The safe mode of operation allows the driller to carefully control the lowering
of casing and tools as they enter or are withdrawn from the drilled hole in a manner
that is safe for both helper and driller. A second mechanical sprag brake is
incorporated in the hydraulic drive to safely hold a load against hydraulic drift.
The change between operating modes is immediate.
Illustrated right is a Consallen diesel direct belt driven winch. They may also be hydraulic or electric
powered. Bare drum pull capacities to 3,000 Kg. can be supplied with various drum capacities, and wire
diameters to suit the intended use.
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NOTE The HYDRAULICALLY DRIVEN versions of our winches provide power-up and power-down
controlled lifting capability, for the safe handling of drilling tools, pumps, or
other loads, including rig erection, while also providing the free-fall method of
operation for drilling, driving casing or for work-over tasks: see below -
Hydraulic Powered Option. When belt driven, the winch is not a lifting device, and
is intended only for use as a freefall winch in a cable percussion drilling context
and for no other lifting purpose.
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SPECIFICATION for the FORAGER-55/1250 'STANDARD' BUILD
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- Winch single line (bare drum) pull: 1250 kg (2750 lbs)
- Weight of drilling tools suggested: 250 Kg (550 lbs). [Up to 500 Kg. (1100 lbs) for rock drilling.]
- Drum capacity: 140m (460 ft) of 10mm dia. wire giving a net drilling depth of 125 metres (410 ft).
- Tripod frame hoisting capacity 8,250 Kg (18,150 lbs)
- Height under top sheave 5 mtrs. (16.4 ft.)
- Lister-Petter hand crank start 10 hp diesel engine, mechanically driving the winch with multiple Vee-belts
- Road wheels (unbraked) & trailer towing gear - 50mm/2" ball
- Width over road wheels 1,300 mm (4'-3")
- Width after removing axle - 620mm
- Length on the road 6.6 m (21'-8") overall
- Towing weight (basic) 450 Kg (880 lbs). The wheel set capacity is 750 Kg (1650 lbs) allowing tooling to be carried
- 6, 8 & 10-inch temporary casing size suggested, for 2, 3, 4, 5 or 6-inch wells.
- Demonstrations can be shown at our works in UK and site Training Packages are available.
OPTIONS & EXTRAS AVAILABLE
- Bigger more powerful engines
- Electric start engines with charge windings & battery
- Hydraulic power take-off from engine
- All hydraulic drive with integral power pack
- 2000 Kg Casing winch - hydraulic
- Powered swivel for rotary drilling - hydraulic top drive Powered Swivel
- Casing Rotator - up to 8-inch diameter casing - hydraulic drive
- Alternative tripod sizes, including very short & other specials
- Larger drum capacity
- Alternative gearing ratios
- Hydraulic casing jacking systems
- Hydraulic casing rotator - good in granular and heavy ground also in hard materials using toothed shoes Casing Rotator
- Alternative wire sizes up to 16mm diameter.
How to drill by Cable Percussion
An outline of the 'shell & auger' method of cable percussion drilling process - a PDF file.
VIDEO:
showing setting up the rig and cable percussion (Shell & Auger) drilling - 11Mb file.
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The following is a list of drilling tools we frequently supply as a package with
rigs intended for drilling holes by normal cable percussion (shell & auger) method
at about 6 inches (150mm) nominal diameter in general soils - without casing. The
list is suitable for drilling Basement Complex weathered overburden, glacial till
& boulder clays, sand, gravel and cobbles. The same tools would be used if both
8-inch and 6-inch temporary casing were required:-
- Drilling wire in lengths to suit the depth envisaged - available to order
up to 140 metres long. Supplied with swaged thimble eye one end and fused & tapered
the other of non rotating crane wire 10mm dia. working load 1250 Kg.
- Attachment shackle - bow type - 3250 Kg. (7150 lbs) SWL.
- Sinker bars standard 100mm diameter weight 50 Kg each, threaded
M/F with barring holes top & bottom. Normally 4 no. required & supplied. Also
available in shorter half lengths, and by weight, to order. 50 Kg suits a two-man
crew and satisfies EU Health & Safety requirements.
SINKER BARS
- Threaded swivel bail for top sinker bar.
- Tool joint spanner - set of 2 no.
- 140mm dia. bailer with clack valve and threaded removable shoe - capacity 20
litres (Available to order up to 50 litres capacity) - See details of the bailer via this link:
BAILER
- 140mm dia. Clay cutter with threaded removable shoe and threaded top to suit sinkers.
See page about the various uses of a clay cutter (the 'Auger' in shell & auger drilling)
CLAY CUTTER
- Basket catcher system for clay cutter comprising plastic catcher basket and
2 no. steel support rings.
- Stubber tool threaded to suit sinkers.
- Spade reamer - approx 180mm dia. - threaded to suit sinkers.
SPADE REAMER
- Cross bit 145mm dia. threaded to suit sinkers - with hard faced welding cutting edges.
CROSS-BIT
- Sliding hammer - light type - for driving cutting tools where required.
- Pair of snatch blocks to pull stuck tools - top one fits to tripod apex - working capacity 2500 Kg.
- Wire puller - 2000 Kg capacity for use with above snatch blocks.
- Universal shoe & shackle tool - used to remove shoes from bailer & claycutter and to tighten shackle pins
Other tools are available, including flush jointed temporary steel drilling
casing and attendant handling, driving and recovery equipment. See details under
the following link:
CASING
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When driven by hydraulics, the winch can be operated in two useful modes. It can
be used as a free-fall winch for drilling and bailing in the usual way, and after
locking off the hoist brake, can be controlled by hydraulic valves for safe lifting
- power up and power down. The second - safe lifting - mode allows controlled
pulling of pumps and casing, and provides the ability to safely lift tools and
enter them into casing. Change between modes is instant.
The hydraulic version is useful as a work-over machine for handling well pumps
while retaining the ability to surge and bail during well development and cleaning
of screens. The action of a bailer used in conjunction with a free-fall winch is
several times more effective than air lifting in development and cleaning wells, and is cheaper.
Hydraulic operation can be with either integral engine driven system, or by separate
independent power pack driven by a variety of power sources. These may be engine
driven, electric motor driven or compressed air powered.
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HI-LO HYDRAULIC POWER PACK
with a 7.5 Kw diesel engine delivers either
high volume at low pressure for fast hoisting of tools, or low volume at high
pressure for maximum pulling power. The change-over between modes is in automatic
response to changes in system pressure. Max. operating pressure is 210 bar (3000 psi) and
max flow is 60 lpm.
This useful independent hydraulic power source can provide power for rotary drilling,
grout pumps, hydraulic casing jacking, and a work-over rig. This latter version of
our rig is used for swabbing and bailing exising wells, in addition to hoisting and
installing pumps, using the power-up and power-down control. It is also often useful
to be able to handle power units separately from the winch and tripod.
The wheeled unit may be transported on the rig's operator platform, providing
counter-balance to the tripod while towing. Operating the engine away from the rig
eliminates vibration & fumes and reduces noise for the operator. The length of
connecting tubes can be specified as an option.
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The rig is shown being used to determine the volume of overburden that will need
to be removed prior to open cast mining of rock salt in Saudi Arabia. Each hole showed
the overburden depth and after penetrating a short way into the rock salt, an
SPT was performed to estimate the overall thickness. In the background a rotary
rig is core drilling at wider spacing to confirm the estimates.
The Forager-55/1250 is being employed to quickly and efficiently provide large
amounts of data over a wide area, with little support or consumables required.
Drilling is normally just a two-man job, but a training session was in progress here.
The standard rig is shown being used here, but a PROSPECTOR version is available
with a light aluminium engine and a completely demountable shorter and lighter
tripod, but similar capability. The PROSPECTOR version is suited to economical Placer
(alluvial) sampling.
link to PROSPECTOR version of the rig
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SITE SOIL INVESTIGATION WORK
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Set up on a floating platform (pontoon), the Forager-55/1250 rig is shown being
used for site soil investigation over water, in advance of a Civil Engineering project
in Poland.
6-inch temporary casing is being used to support the holes, which were nominally 30 metres
deep. The method allows the taking of both undisturbed (U100) and bulk samples.
Standard Penetration Tests (SPTs) can also be performed at any required depth.
An adjustment to the layout would allow the rig to drive piles.
See: PILING
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Main drilling page: Forager pages HANDPUMPS Handpump pages HAND DUG WELLS Well Digging
Consallen Group Sales Ltd., P.O. Box 2993, Sudbury, Suffolk CO10 0ZB, UK.
You may send an SMS (text) to: +447950081067; Tel: +44-(0)1787-247770; e-mail: sales@consallen.com
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Picture curtesy of:- INGEO Sp. z.o.o., Gdynia, Poland