Specifications

CAVINS ROD TYPE SAND PUMP
For General Production Clean Out Service
2853 Cherry Avenue
Signal Hill, CA 90755
Ph: [phone]
Fax: [phone]
This very rugged and efficient Sand Pump is used for general utility production clean out
work where it is not necessary to flush the perforations by means of hydraulic surge. It will
function very efficiently in wells having little fluid and also where fluid in the wells is of a
heavy viscous nature down to 9° A.P.I. gravity. A special blow-out feature is incorporated
which utilizes any gases entrained in the well fluid to discharge the load. A Quick Change
Rope Socket, Sinker Bar, Bottom Sleeve, regular flat adjustable Shoe, Dump Key, and
Wood Clamp (Fig. 1) are furnished as standard equipment with all Sand Pumps 1-3/4" O.D.
and larger.* Load Tubes, Bridge Buster Shoes (Fig. 3), Chisel Shoes (Fig. 4), Rein Jars or
Tubular Jars can be supplied along with many other accessories.
*O.D. of wire line must be specified when ordering.
20
OIL WELL TOOLS
Spring Type Dump Key
Assembly consists of
spring and spring
housing. Is used to
adapt the Dump Key
Wedge for Flat and
Bridge Buster Shoes
and the Round Nose
Shoe Dump Key.
Fig. 1
The Wood Clamp
Assembly slips over
the end of the Working
Barrel or Load Tube.
Its function is to clamp
around the tube and to
suspend the pump
while making up sec-
tions of the tool.
The Bridge Buster
Shoe is used to break
up hard packed sand
and bridges. It is
made from alloy
steel, heat treated
and hard faced on the
cutting edge.
Fig. 3
The Chisel Shoe is
used to break up hard
pieces of cement,
lime, shale, or rocks
that are too large to
enter the bottom of
the tool. It is made
from alloy steel, heat
treated and hard
faced on the cutting
edge.
Fig. 4
The Metal Plunger is
recommended for
wells with elevated
temperatures, replac-
ing the regular
Plunger assembly.
Suction is attributed
to cascade seals. Is
also effective for use
in wells operating
under normal temper-
ature conditions.
Fig. 5
Fig. 4
The Multi-Lip Plunger (Fig. 2) is available
as a standard feature for most sizes of
Cavins Sand Pumps. It is made of synthetic
oil-resisting rubber and is recommended for
normal bailing operations where the well
temperature does not exceed 200°F. A strong
bond between the high strength rubber and
the steel mandrel on which it is mounted pre-
vents the stripping of rubber, even under
severe operating conditions. The multiple lips
provide a perfect upstroke seal and automat-
ically compensates for wear. In wells where
elevated temperatures are encountered,
such as in secondary recovery operations,
an all metal plunger (Fig. 5) is recommended.
The Plunger is designed with a labyrinth seal
which does not require any packing.
However, “O”-Rings may be used for addi-
tional sealing if desired.
ENGINEERING DATA
*These lengths are for single section Sand Pumps.
Optionally, we manufacture 40', 50', and 55' Double
Section Sand Pumps for which a load tube section
must be ordered as an accessory.
For Use In Wgt. Lgth*
Sand Pump Size Pipe I.D. Lbs.
(Feet)
1-1/4" O.D. (Cavins Model 5A) 1-1/2" – 2-1/2" 75 30
1-1/2" O.D. (Cavins Model 4A) 2" – 3" 140 30
1-3/4" O.D. (Cavins Model 3A) 2" – 3" 165 35
2-1/8" O.D. (Cavins Model 2A) 2-1/2" – 4" 265 35
2-5/8" O.D. (Cavins Model A) 3-1/2" – 5" 320 35
3-1/8" O.D. (Cavins Model B) 5" – 8" 400 35
3-3/4" O.D. (Cavins Model C) 6" – Up 500 35
4-1/2" O.D. (Cavins Model E) 6" – Up 630 35
New Style
Old Style