Drill Stem Testing
Equipment

Description
The Model “N” Slimline Failsafe Valve is designed to be used during Drill
Stem Testing operations being conducted from a platform, jack-up or land
rigs. The Valve provides a safety system mounted within the rig BOP
stack to control fluid within the drill string or tubing. The BOP pipe rams
are closed around the slick joint mounted above the Failsafe Valve (FSV).
In the event of an emergency, the shear rams can cut the slick joint
mounted above the FSV, with the with the blind rams isolating the bottom
hole pressure.
Specifications
O.D. 8.00 inch
I.D. 3.00 inch
Length 50.0 inch
Connections 4.5” 4 SA Box x Box
Tensile Rating 450,000 lbs
Temperature -25 F to 250 F
Working Pressure 10,000 psi
Max. Control Pressure 5,000 psi
Service H2S, CO2, N2
Operation
Standard and Failsafe Wireline Services.
In this mode the valve is pre-charged with 1,500 psi if Nitrogen.
Hydraulic pressure is applied against the piston to open the valve.
In this mode the valve will failsafe close through 5/16” Standard
wireline.
Failsafe Coil Tubing Services
In this mode the valve is pre-charged with 2,500 psi of Nitrogen.
Hydraulic pressure is applied against the piston to open the valve. In
this mode the valve will failsafe close through 1 ½” Coil Tubing with
additional closure pressure being applied on the hydraulic close line.

Slip Joint
Description
The Slip Joint is a telescopic joint run in the tool string, allowing five feet of
free travel. It allows for tubing movement caused by temperature changes.
The tool is internally pressure and volume balanced. It is also splined so
that torque can be transferred below the tool
Specifications
O.D. 5” (12.7 cm)
I.D. 2 ¼” (5.72 cm)
Length Extended 27.50 ft (8.38 m)
Collapsed 22.50 ft (6.86 m)
Max Stroke 5 ft (1.52 m)
Connections As per client request
Tensile Strength 350,000 lbs (155,600 daN)
Working Pressure 15,000 Psi (1034 bar)
Torque Strength 10,000 ft. Lbs (13,558
N.m)
Make-up Torque 4,000 ft.lbs (5423 N.m)
Service H2s per NACE MR-01-75
Operation
Slip Joint should be run together in the working string when testing
with annulus pressure operated tools. At the time the packer is set the
Slip Joint will be ½ closed allowing for a maximum of expansion or
contraction due to change in well conditions.

Annulus Operated Reversing Valve (AORV)
Description
The AORV is a single shot circulating valve giving
unrestricted flow between tubing and annulus. Once open,
the tool is retained in this position by a lock ring and can
not be closed.
Specifications
O.D. 5” (12.70 cm)
I.D. 2.40” (5.72 cm)
Connections As per client request
Tensile Strength 350,000 Lbs (155,600 daN)
Working Pressure 15,000 Psi (1034 bar)
Max. Temperature 350º F Premium Trim
Torque Strength 10,000 ft. lbs (13,558 N.m
Make-up Torque 4,000 ft. Lbs (5,423 N.m)
Service H2s as per NACE MR-01-75
Operations
The AORV is opened by applied annulus pressure,
bursting a high accuracy rupture disk (±2 ½ % of the
disks rating.) The pressure acts on an unbalanced
piston, forcing the mandrel to the open position. The
mandrel is then locked open by the locking mechanism.

Multi-Reverse Spot Tool (MRST)
Description
The Multi-Reverse Spot Tool provides a means of establishing communication
between the annulus and the drill string. It has three functional positions: closed,
reverse, and circulate, and may be run in the well in either the closed or reverse
positions.
Specifications
O.D. 5"
I.D. 2.4"
Length 138.2" (11.53 ft)
Shipping 145.8" (12.15 ft)
Weight 575 lb
Connections As per client request
Working pressure 15,000 psi (1034 bar)
Max. Temperature 350° F Premium Trim
Tensile strength 350,000 ft.lb
Torque strength 10,000 ft.lb (13 558 N.m)
Make-up torque 5000 ft.lb to 6000 ft.lb Max.
Service H2S as per NACE MR-01-75
Operation
The tool may be cycled as many times as required. It may be used to displace
fluids before a test, to spot fluids (nitrogen or acid) and/or to reverse circulate
recovered fluids from the drill string.

Pressure Operated Tester Valve (POTV)
Description
The POTV is an annulus pressure-operated down hole ball valve. It is run with a nitrogen section
which compensates for changes in annulus hydrostatic pressures. The POTV is designed to work in
conjunction with either retrievable or permanent packers as no set-down weight is required when
operating. An optional index lock-open system allows the ball to be retained open every second
cycle. This lock open feature allows the POTV to act as a fluid by-pass when placing seals in a
packer bore and aids in wireline and well kill procedures.
Specifications
O.D. 5" (12.70 cm)
I.D. 2 1/4" (5.72 cm)
Length w/N2 section 34 ft (10.36 m)
Tensile strength 380 000 lb (169 000 daN)
Working pressure 15 000 psi (1034 bar)
Make-up torque 4000 ft.lb (5423 N.m)
Service H2S as per NACE MR-01-75
Connections To client specifications
Operation
The POTV is run above the packer and recorder carriers in a cased hole test string. Thereafter it
provides for down hole shut-in and flowing test procedures by selectively closing and opening the
test string to flow. When the test assembly is run to depth and the packer set, applied annulus
pressure causes the ball valve to rotate to the open position, allowing full bore passage through the
tool. It remains open until the pressure is bled off, or when running the lock open feature, and closes
when the tool is cycled again. The POTV is designed to be used with Geoservices' EMROD TM
when real-time surface readout is required. With the POTV run in the hole in the closed position it
may be tested against as many times as desired. (If used in conjunction with Geoservices' circulating
valves it provides an effective system for running TCP guns in a well and establishing an
underbalance by running a portion of the tubing string dry).

Annulus Reference Trap System (ARTS)
Description
The ARTS is used to trap a pressure in the reference section of the Pressure
Operated Tester Valve (POTV). Once this reference pressure has been trapped, the
POTV can then be operated through the application and removal of applied annulus
pressure.
Specifications
O.D. 5" (12.70 cm)
I.D. 2 1/4" (5.72 cm)
Operating pressure 650 psi differential (44.82 bar)
Check Valve relief press. 700 psi (48.62 bar)
Tensile strength 350,000 lb (155 600 daN)
Working pressure 15,000 psi (1034 bar)
Torque strength 10,000 ft.lb (13 558 N.m)
Make-up torque 4,000 ft.lb (5423 N.m)
Service H2S as per NACE MR-01-75
Operation
The ARTS is run as part of the POTV/reference section. By isolating the I.D. from
the O.D. (i.e. setting a packer or placing seals into a seal bore) and applying an
annulus pressure, a reference is trapped in the POTV. The POTV can now be
operated by annulus pressure. The ARTS also contains a check valve system which
regulates the operating pressure. The check valve also relieves the trapped
reference pressure at the end of the test as the tool is pulled to surface. This
ensures that bottom hole pressure is not brought to surface in the tool.

Gauge Carrier
Description
The Recorder Carrier is a full bore tool that may be run in any position in the test string.
The Recorder Carrier will carry up to four 1 1/4" O.D. gauges for recording pressure and
temperature versus time. Each gauge can record external or internal data. Available at
customer’s request are the Amerada RPG-3 mechanical gauges and Geoservices
electronic memory gauges.
Specifications
O.D. 4.9" (0.53" offset)
I.D. 2 1/4" (5.72 cm) straight bore
Length 21.5 ft (6.55 m)
Connections As per client request
Tensile strength 400,000 lb (177,900 daN)
Torque strength 10,000 ft.lb (13,558 N.m)
Working pressure 15,000 psi (1034 bar)
Make-up torque 4000 ft.lb (5423 N.m)
Service H2S as per NACE MR-01-75
Operation
The Recorder Carrier is normally run directly below the POTV to record pressure transient
data. The carrier is designed to minimize shock caused by tubing conveyed perforating,
and for ease of installation and removal of gauges at the wellsite.

Description
The EMROD™ is used to transmit formation pressure and temperature in real time to the surface during DST
operations. The signal from the EMROD™ gauge carrier is sent via electromagnetic waves across the downhole valve
and received by the EMROD™ shuttle. The signal is sent to the surface through a 7/32" monoconductor cable.
Features
• Innovative wireless transmission system means no time wasted on troublesome electrical feed through, pressure
ports or wet latches.
• During shut-in, the EMROD™ shuttle can receive real-time and previously recorded data simultaneously.
• The use of up to 3 high-accuracy, high-temp MQG-X quartz gauges, independently recording and storing downhole
data, assures optimum data back-up.
• Two way communication between the EMROD™ gauge carrier and the EMROD™ shuttle gives the operator full
control over the transmission status, thus optimising battery consumption.
• Data validation and basic interpretation during "build-up" using state of the art interpretation software.
Specifications
EMROD™ shuttle HT/NOGO Sub
O.D. 2 1/16" (5.24 cm) O.D. 5" (12.7 cm)
Max. Temperature 350 °F (175 °C) I.D. 2 1/4" (5.72 cm) diameter full bore
Max. Pressure 15,000 psi (1034 bar) 2" (5.08 cm) diameter across NOGO ring (optional)
Length 8.26 ft (2.52 m)
EMROD™ gauge carrier Service H2S as per NACE MR-01-75
I.D. 2 1/4" (5.72 cm) Tensile rating 350,000 lb (155,600 daN
Length 11.22 ft (3.42 m)
O.D. 51/2" (13.97 cm) with fishing neck 5" (12.7 cm)
Gauge capacity 3 Independent memory of 200,000 sets of data (t, P, T)
Max. Temperature 350 °F (175 °C)
Max. Pressure 15,000 psi (1034 bar)
Service H2S as per NACE MR-01-75
Tensile rating 350,000 lb (155 600 daN)
ElectroMagnetic Read Out Device (EMROD)

Hydraulic Jar (Jar)
Description
The Hydraulic Jar is used for the purpose of freeing stuck pipe and tools in the wellbore. This
device delivers heavy impact blows to the test string by storing energy within the tool. In well test
applications the tool is run directly above the Safety Joint. The Hydraulic Jar is designed to
transmit torque and withstand severe tensile and compressive loads.
Specifications
O.D. 5" (12.7 cm)
I.D. 2 1/4" (5.72 cm)
Length extended 10.13 ft (3.09 m)
Collapsed 9.29 ft (2.83 m)
Connections As required by customer
Tensile strength 350,000 lb (155 600 daN)
Working pressure 15,000 psi (1034 bar)
Torque strength 10,000 ft.lb (13 558 N.m)
Make-up torque 4000 ft.lb (5423 N.m)
Service H2S as per NACE MR-01-75
Maximum pull on Jar 80,000 lb (35 590 daN)
Operation
The Hydraulic Jar is activated by picking up on the test string and holding tension. The applied
tension at the tool forces the oil in the oil chamber to pass through a flow regulator at a controlled
rate. This controlled action continues until the piston reaches the grooved section of the cylinder
bore; the oil is then rapidly discharged at an uncontrolled rate to the lower section of the oil
chamber. This release of energy together with the energy stored in the stretched test string
causes the mandrel to accelerate upwards until the mandrel hammer area strikes the anvil stop,
delivering high impact force to the stuck object. The tool is multi-use and can be rapidly re-
cocked by slacking off the work string.

Safety Joint and Overshot (SFJT)
Description
The Safety Joint provides for an emergency release between the work string and the
packer. In the event that the Safety Joint is released, the Overshot can be run to reconnect
the work string with the packer assembly.
Specifications
O.D. 5" (12.7 cm) 5 7/8" (14.9 cm)
I.D. 2 1/4" (5.72 cm) 2 1/4" (5.72 cm)
Length 1.96 ft (0.59 m) 2.58 ft (0.786 m)
Connections As per customer request
Tensile strength 505,000 lb 350,000 lb
(224,600 daN) (155,600 daN)
Working pressure 15,000 psi (1034 bar)
Torque strength 10,000 ft.lb (13 558 N.m)
Make-up torque 4000 ft.lb (5423 N.m)
Service H2S as per NACE MR-01-75
Releasing operation
The Safety Joint is run on the test string directly above the packer. Release is effected by
taking an upstrain on the test string and rotating to the right. Release is controlled by make-
up torque, which can be varied. Eleven turns are required to back off the Safety Joint.
Retrieving operation
The Safety Joint can be reconnected to the test string by slowly setting down and rotating
the overshot to the right into the retrieving threads.

Description
The new Geoservices HP-HT Retrievable Packer is built to withstand the effects of the very high pressure and
temperature encountered during DST operations in HP/HT wells. This premium packer is rated to 15,000 psi at 425
°F. These high standards are achieved through the use of state-of-the-art elastomers, thermoplastics and metallic
sealing components.
Features
• built-in by-pass to allow faster run and pressure equalization upon release
• carbide insert slips and drag blocks to ensure the best grip performance, even in the hardest casing grade
• alloy construction meeting NACE specifications
• the packer will withstand full rated pressure from above. Differential pressure from below is permitted when using
the hold down sub.
Specifications
Casing size 7"
Casing range 29 to 38 lb.ft
ID 2.438" (6.19 cm)
OD 5.875" (max.) (14.92 cm)
Tensile strength 130,000 lb (57 800 daN)
Working pressure 15,000 psi (1035 bar)
Temperature rating 425 °F (218 °C)
Connections 3 1/2" API IF Box and Pin
Make up torque 8000 ft.lb (10 845 N.m)
Service H2S as per NACE MR-01-75
Operation
At setting depth, pick-up, rotate the tubing 1/4 turn to the right at packer level, then slack off weight on the packer.
Once set the packer will hold slack off weight in excess of 100,000 lb. To release, only a straight pull is necessary
HP-HT Retrievable Packer

Description
The Geoservices Retrievable Packer is a retrievable hook-wall packer, suitable for
compression test string applications and capable of withstanding TCP underbalance
perforating shock. This packer is designed to operate in both testing and stimulation
applications. The packer provides isolation of the test interval from the annulus, allowing
the reservoir to be tested, and in addition facilitates the use of annulus pressure-operated
test tools.
Specifications
Size 7" 9 5/8"
O.D. As per casing specifications
I.D. 2.416" (6.14 cm) 3.00" (7.62 cm)
Tensile strength 105,000 lb 185 000 lb
(46,700 daN) (82,300 daN)
Working pressure 8,000 psi 7,500 psi
(551 bar) (517 bar)
Make-up torque 2,300 ft.lb 3,200 ft.lb
(3118 N.m) (4338 N.m)
Connections 2 7/8" 8RD 3 1/2" 8RD
Service H2S NACE MR-01-75
Operation
This packer is run in the hole in the run-in position. When at setting depth the work string is
rotated 3/4 of a turn to the right at the packer. String weight is then set down allowing the
elements to be compressed against the casing wall. The packer is unset by straight pull on
the test string. The packer may be reset if required.
Retrievable Packer

MRST Reverse / Circulate ONLY
Cycle Positions (5 Cycle)

MRST Reverse / Circulate / Spot
Cycle Positions (9 Cycles)

POTV Cycle Position
Pressure Cycles
1
2
3
4
0
Pressure Annulus
= POTV Open
Bleed Annulus to 0 psi
= POTV Locked Open
Maintain Pressure Annulus
= POTV in Failsafe Position
Bleed Annulus to 0 psi
=POTV in Closed Position
1
2
3
4
Bleed Off Cycles