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In a collaboration effort
with a leading drill rig manufacturer, Jaffer Associates introduced
the first production of the Dual Tube / Dual Table Drill rig.
This proprietary system uses a lower rotary casing driver to
advance 12” up to 24” casing through tough overburden.
Simultaneously, a top rotary head handles 7” x 4-1/2”
dual walled drill pipe equipped with 11” to 23”
tri-cone bit to drill inside or ahead of the casing. While drilling
test/pilot holes, casing is not required as a 7” open
center bit is used with air providing 99% accuracy at each sampling
level. Air circulates downward through the annulus of the inner
and outer pipes to the bit sub where a venturi redirects the
air, along with continuous uncontaminated geologic samples,
up through the inner pipe to the surface. The cuttings pass
through the discharge swivel into a sampling recovery unit permitting
easy and accurate collection. No drilling mud is used during
this process, allowing for uncontaminated and accurate water
and lithology sampling. Upon removal of the bit/drill pipe assembly,
mud can be displaced into the drilled open hole, thus providing
the ability to geophysically log the hole after gaining accurate
core and water quality samples. Presently, Jaffer staffs and
operates three of these unique drill rigs with a fourth to arrive
in 2005.
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Presently, Jaffer Associates
maintains and operates four mud rotary drill rigs complete with
mud containment circulation systems, drill pipe (sizes: 3-1/2”,
5-1/4”, 7”), compressors, cementing units, and test
pumps capable of up to 5000 gpm tests. With a diverse fleet
of drill rigs, Jaffer is well equipped to construct wide-ranging
classes of water wells up to 48” in diameter. Our past
experience
includes Floridan Aquifer wells, ASR wells, deep monitor well
refurbishments, and Class I injection wells. Our fleet includes
the following:
- Dugan Double drill rig with complete top drive drilling
capability and maximum hookload of up to 268,000 pounds.
- Ideco Rambler drill rig complete with hookload capacity
of 165,000 pounds.
- 3500 Speedstar drill rig complete with hookload capacity
of 95,000 pounds.
- 2000 Failing drill rig complete with hookload capacity
of 50,000 pounds.
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