DOWNHOLE TOOLS

We offer a wide variety of tools to suit all of your well logging needs. All of our tools come in a variety of sizes and combinations. Contact us today to find out more.

Caliper can be utilized as a spring type centralizer above or below existing radiation tools
H2S and corrosion resistant material used throughout, including the spring material
Motors, lead screw, shaft seals and switching circuits are eliminated using the magnetically coupled caliper
No power is required to open or close this tool
Advantages, besides centralizing, is logging up or down without closing springs, IN/OUT flexibility in springs gives minimal error and excellent repeatability
Available in 3 version:
- Pulse type output
- Analog type output
- One wire feed-thru relay option for running in conjunction with other tool types

Magnetically coupled caliper

This caliper measures EMF proportional to casing millivolts. With each survey point, the caliper is placed into a zone and arms set open, than a surface millivolt meter is used to make measurement of the potential. After readings, arms are retracted and the next zone is tested for current flow. To insure electrical connection to the inside casing, sharp carbide contacts are used. A minimum of 4 conductors are required for this survey.

Motorized open and close
12' electrical measure points
18' overall length
7' maximum length with break-down
Temp rating: 300° F
Pressure rating: 15k PSI

casing contact caliper

Standard caliper available with single arm, three arm, and XY assembly.
Heavy duty motorized arm section with a hi-torque DC motor with ball screw drive
Carbide wear pads with hard surface subs
Optional electrode arm tips for dry-hole resistivity and RSP bands available in all models
Electrical feed thru for stacked subs; specify single, four, or seven conductor top subs
Optional V.C.O. pulse type caliper for single conductor service available

*For sizes, pressure and temp ratings refer to chart on "Info and Data" page

*Custom tool stacks available upon request

motorized caliper

All probes run on +120 volts @ 60mA
High pressure and/or H2S resistant housings available
Large volume, high-sensitivity scintillation detectors available on 1 5/8" OD tools and up

*For sizes, pressure and temp ratings refer to chart on "Info and Data" page

logging gamma ray probes

Although virtually all of Comprobe's logging gammas may be used for production work, these three probes are most often utilized:
1204 series (often paired with injector)
1304 series (often paired with injector)
1804 series (shortened version with slip-ring adaptation for production logging)

production gamma ray probes

Comprobe utilizes ruggedized scintillation-type detectors or GM tubes for gamma ray correlation in shooting gamma ray probes. Detectors are 3-axis shock protected for longer operating life. Tool contains negative shoot-thru protection. These probes are typically combined with top or bottom mount CCL's that are modular coil and magnet assemblies with dual-diode protection. Appropriate subs are necessary looking down into the perforating guns for 1 5/8" OD and larger.

*For sizes, pressure and temp ratings refer to chart on "Info and Data" page

perforating gamma ray probes

Dual channel to indicate flow direction and velocity
Minimum sensitivity: 4 FPM
Utilizes photo transfer encoder and light source to detect impeller speed
Temp rating: 225° F
Pressure rating: 20k PSI

Flowmeter

3/4" Single Cond. for 7/8" probe
1" Single Cond.
1" Four Cond.
1 1/4" HD Four Cond.
1 7/16" Single Cond.
1 1/2" Seven Cond.

Cable Heads

Combines di-electric and temp measurement in one
Super polymer cell di-electric gives accurate determination of oil, water, and gas
Platinum thin-film ceramic substrate gives excellent stability, response, and accurate temp reading
+/- 1% accuracy
Temp rating: 300° F
Pressure rating: 20k PSI

Capacitance-Temperature Probe

1 11/16"-16" Magnetically coupled caliper centralizer
1 13/16"-16" Low profile centralizer; 3 leaf
2 1/4"-14" Standard centralizer; 3 leaf
2 1/4"-14" Housing type for neutron or temp probe; 3 leaf
2 1/2"-14" HD centralizer; 4 leaf
2 1/2"-14" Housing type HD centralizer; 4 leaf
3 5/8"-24" Magnetically coupled caliper centralizer

Centralizing Bow Springs

Single cond. top sub
Scintillation type gamma ray sections are identical except for pulse polarity and divide by ratio
Top section for natural gamma and lower for omni directional density
Excellent for gravel pack
Uses a 150 mCi Cs-137(or equivalent) source
Temp rating: 300° F
Pressure rating: 20k PSI

4pi Omni Directional Density Probe

Long spaced, focused detector: Nal crystal with photo-tube
Short spaced, focused detector: Halogen quench Geiger tube
Utilizes Cs-137 (or equivalent) in collimating shield
Very effective in dry or fluid filled holes
Includes de-centralizing bowstring with carbide wear pad
Temp rating: 225° F
Pressure rating: 20k PSI

Dual Spaced Collimated Density Probe

1 1/4" probe
- Detector: Nal Crystal with photo-tube
- Uses 50 mCi Am 241 source (or equivalent)
- Temp rating: 225° F
- Pressure rating: 5k PSI
2 1/8" or bigger
- Same construction as dual spaced except no short spaced detector
- Temp rating: 225° F
- Pressure rating: 20k PSI

Single Spaced collimated density probe

LE version uses scintillation detector with a 50 mCi AM 241 (or equivalent) source
- Temp rating: 225° F STD, 300° F optional
- Pressure rating: 20k PSI
HE version uses Geiger Muller detector with 10 mCi Cs 137 source
- Temp rating: 350° F
- Pressure rating: 20k PSI

Fluid density probe

1 7/16" shooting dual diode, monel, 350° F, 20k PSI
1 5/8" motor tool tri diode, monel, 350° F, 20k PSI
1 5/8" shooting dual diode, monel, 350° F, 20k PSI
1 3/4" shooting dual diode, monel, 350° F, 20k PSI
2 1/8" shooting dual diode, Beryl-copper, 350° F, 20k PSI
3 1/4" shooting dual diode(comes with quick change firing adapter), beryl-copper, 400° F, 20k PSI

casing collar locators

(Single Cond shooting type)

1" Beryl-copper, 350° F, 15k PSI
1 1/4" Stainless steel, 350° F, 5k PSI
1 3/8" Monel, 350° F, 20k PSI
1 7/16" Monel, 350° F, 20k PSI
1 5/8" Monel, 350° F, 20k PSI
1 5/8" High temp, monel, 500° F, 20k PSI
1 5/8" W/ slip rings, monel, 350° F, 20k PSI
2 1/8" Beryl-copper, 350° F, 20k PSI
2 3/4" Beryl-copper, 350° F, 20k PSI
3 1/4" Stainless steel, 350° F, 10k PSI

Casing collar locators

(Logging type with amplifier)

16" center to center, typical source to detector spacing
6" HE3 detector
Open or case hole porosity survey
7/8"-2 1/8" OD probes may use a 1.2 Ci AmBe source for open hole only
1"-3 1/4" OD probes may use a 3 Ci AmBe source for cased or open hole

*For sizes, pressure and temp ratings, refer to chart on "Info and Data" page

Single Space neutron probe

Cased and open hole operation
4" HE3 short spaced detector
6" HE3 long spaced detector
Uses 5 Ci AmBe (or equivalent) source
8 1/4" spacing from source to short spaced detector
11 1/2" spacing from short spaced detector to long spaced detector
Temp rating: 300° F
Pressure rating: 20k PSI

Dual spaced neutron probe

Uses a piezo-electric crystal to detect downhole audio frequency and amplitude variations due to fluid and gas movement
10mv to 7V peak to peak output, can be hooked to external speaker
Runs stacked with a 0°-300° F linear temp probe, that generates 10 PPS per degree
Temp rating: 300° F
Pressure rating: 20k PSI

noise temperature probe

Provides precise rotational positioning of lower stacked orienting tool and perforating gun
Excellent for use in multiple completion perforating
Shooting adapter to connect retrieveable jet perforating strings
10 position indicator
Temp rating: 350° F
Pressure rating: 20k PSI

motorized orienting tool

Solid state pressure transducer uses piezoresistive sensor
2 standard pressure ranges available: 0-500 PSI and 0-10,000 PSI
Maximum typical full scale error of .5%, typical .1%
Maximum repeatability error of .05%
Temp rating: 250° F
Pressure rating: Max pressure of pressure transducer

*Custom pressure ranges available upon request

Pressure Probe

Solid state pressure transducer uses piezoresistive sensor
2 standard pressure ranges available: 0-5000 PSI and 0-10,000 PSI
Maximum typical full scale error of .5%, typical .1%
Maximum repeatability error of .05%
Temp rating STD: 250° F
Temp rating hi-temp: 400° F
Pressure rating: Max pressure or pressure transducer

*Custom pressure ranges available upon request

Pressure temperature probe

Rugged fiberglass mandrel with no downhole electronics
Heavy duty lead bands
Capacity of simultaneous 8"-16"-32"-64" E-log. Spontaneous potential and point resistance
Four or seven conductor service
Temp rating: 350° F
Pressure rating: 20k PSI

electric log sonde

Focused articulated density sonde
Micro log resistivity-pad type
Pulse type gamma ray scintillation type
Hi torque D.C. motor with ball screw
4"-16" caliper range with hydraulic pad shock absorber
Time share electronics increases counting accuracy
Simultaneous resistivity micro log 2" normal with a 1x1 inverse lateral
Density prove may be replaced by focused neutron

Microresistivity probe

Provides electrodeless conductivity measurement from 50 x 10^-6 Siemens to 1000 x 10^-3 Siemens
Extremely rugged construction of sensor permits operation in caustic and acidic environments
Temp rating: 300° F
Pressure rating: 1000 PSI

Electrodeless conductivity

Induction: 5 coil system; 28" spacing; 40KHZ induced frequency
Built in scintillation type gamma ray detector
Downhole zero calibrate for SN-SP-IND
16" spacing on SN
Uses adjustable bowstring centralizer
Temp rating: 250° F
Pressure rating: 20k PSI

induction probe

Continuous recycle on negative voltage, requires 4 minutes for full cycle, two minutes in each direction
Rugged hi-torque motor with ball screw drive
Superior corrosion resistance with Nitronics 50 housing
Standard capacity: 10CC, larger capacity available
Temp rating: 350° F
Pressure rating: 20k PSI

Injection tool

Heavy duty hi-toque motor with ball screw drive
Pressurized sample size easily changed by using different length or OD of reservoir housing
Bottom sub encloses sample transfer valve
Works on single conductor cable
Standard capacity: 1 liter
Temp rating: 300° F
Pressure rating: 5k PSI

Fluid Sampler

Various lengths and OD's available
Feed thru can be single or multi-conductor
Typical material is 303 SS

sinker bars

Detects minute changes in thermal gradients associated with water communication or gas movement over 0-300° F
Pressure rating: 5k PSI or 15k PSI depending on model
High pressure rating and/or H2S resistant housings available
All models incorporate a fast response platinum sensor

temperature probe

Plug in microprocessor electronics
Single transmitter, single receiver emulation
On the fly down hole pulse or sine calibration signal
Different isolator frequencies available
Interfaces with additional pulse type tools
Anti-coincidence and time share pulsing avoids dead time and signal cancelling of pulse type tools
Down hole gain control for different pipe sizes
Rigid low noise isolator provides ruggedness and reliability
Optional CCL, centralizing bowstrings, gamma, and neutron probe
Temp rating: 300° F without flask/400° F with flask
Pressure rating: 20k PSI

Single receiver Bond tool

Plug in microprocessor electronics
Dual/single transmitter, dual receiver emulation
On the fly down hole pulse or sine calibration signal
Different isolator frequencies available
Interfaces with additional pulse type tools
Anti-coincidence and time share pulsing avoids dead time and signal cancelling of pulse type tools
Down hole gain control for different pipe sizes
Rigid low noise isolator provides ruggedness and reliability
Optional CCL, centralizing bowstrings, gamma, and neutron probe
Temp rating: 300° F without flask/400° F with flask
Pressure rating: 20k PSI

dual receiver bond tool