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Geo Mag Technologies

Technology

Company-owned MWD/LWD systems, the surface equipment that decodes and logs them, and the data path to your office.

How Geo Magruns MWD/LWD

Company-owned tools, maintained in-house and configured for the well.

  • Company-owned MWD systems

    Geo Mag relies heavily on company-owned MWD systems so that quality control stays at its highest level.

  • In-house inspection and repair

    Tools are inspected and repaired in-house rather than sent out.

  • Vendor-partnered modifications

    Geo Mag has partnered with its vendors to make proprietary modifications to tool components, resulting in improved performance and accuracy.

  • Field-configurable tool strings

    The MWD tools assemble easily in the field and can be configured with gamma, resistivity, and PWD for a variety of downhole conditions.

  • Pressure and resistivity in the string

    The PWD tool and the wave propagation resistivity sub run fully integrated in the MWD tool string and deliver wireline-like logs through mud-pulse telemetry.

  • Remote monitoring

    The Polaris logging system gives the customer remote monitoring of the job from anywhere on the network.

SourceGeo Mag company presentation.

Background: Offshore platform at dusk · editorial stock footage

Downhole

Downholesystems

What runs in the string. Geo Mag statements are marked as such; equipment figures are the manufacturers published specifications.

Tool platform

  • 1 7/8 in. wireline-retrievable positive-pulse MWD toolKeydrill and Rime mud-pulse components, chosen for reliability and rugged design
  • Bench Tree resistivity tools
  • APS resistivity tools
  • Extreme Engineering EM tools
  • PWD (pressure-while-drilling) tool, integrated in the MWD string
  • Wave propagation resistivity (WPR) sub
  • Gamma

SourceGeo Mag company presentation.

Positive-pulse MWD tool

Directional, gamma and resistivity configurations

The MWD tool is the instrument that tells the directional driller where the bit is and where it is heading. Survey and tool-face data come up the mud column as pressure pulses, so the trajectory can be corrected while drilling instead of after a trip.

Geo Mag uses the 1 7/8 in. wireline-retrievable positive-pulse MWD tool, a type widely used across small and mid-sized MWD companies for its flexibility and availability. Keydrill and Rime were chosen as the mud-pulse component manufacturers because they have proven extremely reliable, innovative and rugged, and their tools report enough information that drilling parameters can be changed to mitigate tool damage.

Geo Mag

Rime slick-hd servo pulser

Rime Downhole Technologies

Mud-pulse telemetry in high-solids and high-LCM environments

The pulser is the valve that writes downhole data into the mud column. Lost-circulation material, high solids, heat and pressure are what break pulsers; a valve that keeps clearing itself is what keeps the surveys coming.

Valve and drive
Rotary shear servo valve; magnetically coupled, piston-compensated drive
Temperature rating
175 C (347 F)
Pressure rating
20,000 psi
Housing OD
1.875 in.
Pulse widths
0.375 to 2.0 s (dual port); 0.188 to 2.0 s (quad port)
Shock and vibration
1,000 g at 0.5 ms; 20 g RMS, 30 to 500 Hz
Memory
8 MB non-volatile event and statistical logging

SourceManufacturer datasheet, Rime Downhole Technologies

PWD, annular pressure-while-drilling

Pulse Directional Technologies

Real-time downhole pressure and ECD

Annular pressure while drilling turns equivalent circulating density from a calculation into a measurement. It shows whether the hole is being cleaned, flags kicks and influxes early, and lets the overbalance be held tight without giving up rate of penetration.

The PWD tool is fully integrated into the MWD tool string, gives wireline-like logs through mud-pulse telemetry, and allows real-time ECD measurements.

Geo Mag
Tool OD
4.75 to 8.0 in.
Temperature rating
175 C
Transducer rating
15,000 to 29,000 psi
Accuracy
0.1% of full scale, worst case
Repeatability
+/- 1 psi
Applications
ECD measurement, kick and influx detection, hole-cleaning monitoring, formation integrity tests

SourceManufacturer datasheet, Pulse Directional Technologies APWD

Wave propagation resistivity (WPR) sub

Geosteering, correlation and wireline replacement

Propagation resistivity reads the formation around the bit in real time, so a lateral can be steered to stay in the target zone and casing points can be picked without waiting on a wireline run.

The wave form propagation resistivity tool allows for geosteering in both water-based and oil-based mud. It gives wireline-like logs through mud-pulse telemetry, and it is versatile and robust, so reliability is much greater.

Geo Mag
Measurement
Spatially compensated, dual frequency (400 kHz and 2 MHz), dual spacing
Tool sizes
3.5, 3.75, 4.75, 6.75 and 8.0 in.
Mud types
All, including oil-based and salt-saturated
Temperature
0 to 302 F standard; 347 F option
Pressure
20,000 psi
Resistivity range
0.1 to 4,000 ohm-m (phase difference)
Memory
32 MB integrated flash; high-resolution data retrievable during trips

SourceManufacturer datasheet, SureLog WPR

Surface systems

Decoded at the rig floor.Logged in the trailer.Watched from the office.

Decoding at the rig floor: Eclipse Touch and KeyDrill KDU-Mini. Logging in the trailer: Polaris RDS logging system.

KeyDrill KDU-Mini decoding unit · Detection
Synchronization using a single pulse; decoding of pressure pulses as low as 1 psi.
KeyDrill KDU-Mini decoding unit · Display
12.1 in. touch screen, 1,600 nits, adjustable for sunlight and low light
Polaris RDS logging system · WITSML
Automatic synchronization to the client WITSML server; up to four destinations; corrections re-transmitted

SourceManufacturer datasheets: KeyDrill; Polaris Guidance Systems (2012). Surface decoding units: Geo Mag equipment list and owner statement. Pulse detection figure: KeyDrill KDU-Mini datasheet.

Aerial view of a land drilling rig · editorial stock footage

Surfacesystems

Decoding at the rig floor and logging in the trailer, with remote monitoring for the customer.

KeyDrill KDU-Mini decoding unit

KeyDrill

Mud-pulse decoding at the rig floor

Every survey depends on the surface receiver separating a small pressure pulse from pump noise. Deeper wells and PDC bits distort the signal; the lower the pulse a decoder can resolve, the more of the well it can survey reliably.

The KeyDrill KDU-Mini automatically adjusts its receiver settings to optimize mud-pulse decoding. It supports single-pulse synchronization and can decode pressure pulses as low as 1 psi.

Detection
Synchronization using a single pulse; decoding of pressure pulses as low as 1 psi.
Setup
Automatic detection technology; no operator-set pulse thresholds
Decoded parameters
Tool face, inclination, azimuth, magnetic field, gravity field, dip angle, gamma, pressure, battery voltage, temperature, resistivity, pulse amplitude and width
Integration
Standard WITS and depth tracking; Q-Bus and CAN-Bus MWD tools; wireless link to the trailer laptop
Display
12.1 in. touch screen, 1,600 nits, adjustable for sunlight and low light
Environment
-20 to 50 C operating; 3 g RMS vibration; 10 lb

SourceManufacturer datasheet, KeyDrill

Eclipse Touch decoding unit

Surface decoding

Geo Mag uses Eclipse Touch for surface decoding.

Polaris RDS logging system

Polaris Guidance Systems

Gamma and directional data logging with remote monitoring

The logging system is where surveys, gamma and drilling parameters become the well record: plots, LAS files and reports the operator keeps, and a live feed the office can watch without being on location.

The Polaris gamma logging software is a unique but user-friendly system. It runs on a Linux operating system, which makes it very reliable, and it allows the customer to have remote monitoring capabilities.

Geo Mag
Interface
Standards-compliant web browser; local and remote users over LAN or WAN
Compatibility
All major MWD decoding systems; all WITS-based rig monitoring systems (EDR)
Data
LAS import and export; PDF log plots and roll-paper plotting; survey plots and reports
WITSML
Automatic synchronization to the client WITSML server; up to four destinations; corrections re-transmitted
Unattended operation
Survey on connection; automatic re-logging; e-mail distribution of plots, reports and LAS files

SourceManufacturer documentation, Polaris Guidance Systems (2012)

From the bit to the office, in near real time.

Decoded at the rig floor, logged in the trailer, shared with the rig, and pushed to the client server.

Real-time data path from the MWD tool to the officeA diagram of the measurement chain: the MWD tool downhole sends pressure pulses up the mud column, a standpipe transducer receives them, an Eclipse Touch or KDU-Mini decoding unit decodes them at the rig floor, and the Polaris RDS logging system records, plots and shares the data with the rig and the office. Illustrative only.DIRGAMMARESPWDMWD TOOLMUD PULSESTANDPIPETRANSDUCERTFINCAZIECLIPSE TOUCH /KDU-MINI · RIG FLOORPOLARIS RDS · TRAILERWITS / EDR · WITSMLREMOTE USERS

Measurement chain, tool to officeIllustrative

  1. 01 · MEASURE

    Measure

    Directional, gamma, resistivity and pressure-while-drilling measurements are taken in the MWD string as the well is drilled.

    • MWD toolDownhole measurements encoded as mud pulses
  2. 02 · TRANSMIT

    Transmit

    The positive-pulse tool encodes the readings as pressure pulses in the mud column. A standpipe transducer picks them up at surface.

    • Pressure transducerStandpipe pressure signal into the decoder
  3. 03 · DECODE

    Decode

    An Eclipse Touch or KeyDrill KDU-Mini decoding unit turns the pulses back into survey data at the rig floor and sends the decoded values to the trailer. The KDU-Mini is rated to resolve pulses as low as 1 psi.

    • Eclipse Touch / KDU-MiniDecodes the pulses at the rig floor and sends the data to the trailer
  4. 04 · MONITOR

    Monitor

    Polaris RDS logs and plots locally, shares the feed with the rig monitoring system, and pushes it to the client WITSML server so office engineers follow the well in near real time.

    • Polaris RDSLogs, plots and stores the data locally
    • Rig WITS / EDRShares the feed with the rig monitoring system
    • WITSML serverPushed to the client server, up to four destinations, with corrections re-sent
    • Remote usersOffice engineers monitor the well in near real time

    SourceData path from the Polaris Guidance Systems documentation in the Geo Mag presentation. Remote monitoring and the Eclipse Touch decoding unit are Geo Mag statements. Pulse detection figure: KeyDrill KDU-Mini datasheet.

Reliability and quality control

In short, we believe that we carry a very strong fleet of MWD/LWD tools. This gives us the capability of operating in the most extreme conditions.

We are continually seeking ways to make improvements on these tools.

SourceGeo Mag company presentation.

Safety programs

  • ISNetworldGeo Mag is part of the ISNetworld contractor network.
  • SIMSGeo Mag follows the SIMS safety program.

Talk to Geo Mag about the tools for your well.

Call or text (337) 278-4607, 24 hours. Or send a message through the contact form.

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Geo Mag Technologies