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Through-the-bit logging services

Full wireline measurement suite for logging geometrically complex and unstable wells

ThruBit through-the-bit logging services provide a unique conveyance platform for a set of nine slim formation evaluation tools to efficiently log difficult-to-access wells.

No longer are operators limited to time-consuming specialty conveyance or forgoing logging completely. A logging string comprising any number of the ThruBit services measurement tools can be conveyed through the drillstring and Portal pass-through bit to log the open borehole on wireline or as the drillpipe is tripped out of the hole.

ThruBit Through-the-Bit Logging Services in the field

The presence of drillpipe in the well protects both the toolstring and borehole integrity, with the driller maintaining complete control.

How it works: Logging beyond gravitational descent

Eliminate additional trips and save rig time by deploying the toolstring and logging during hole conditioning.

1. The Portal pass-through bit is used to ream to TD to prepare the borehole for logging.
2. The driller pulls the bit off bottom to provide room for the logging toolstring, which is pumped through the drillpipe.
3. The toolstring is pushed through the Portal bit opening into the open borehole, where functionality is verified, and then the wireline is disconnected and removed from the drillpipe.
4. Logging in memory mode occurs as the pipe is tripped out of the hole.
5. Once logging is complete, the Portal bit at the end of the drillpipe and toolstring are pulled up into the casing.
6. A retrieval tool is lowered on wireline to latch onto the toolstring and return it to surface.
7. With the logging toolstring recovered from the drillpipe, drilling or other operations can resume while the logging data is reviewed.

Slim, multiconveyance logging portfolio

ThruBit services formation evaluation tools provide a complete set of logging measurements packaged in a small diameter of 2 1/8 in. The measurements range from the classic triple- and quad-combo suites through advanced high-resolution laterolog, spectral gamma ray, dipole sonic, and borehole imaging.

Deployed in any combination, the ThurBit services tools meet your needs in slim holes and difficult borehole configurations and conditions.

ThruBit services triple-combo

This workhorse logging suite comprises neutron, density, and array induction resistivity in combination with the telemetry, memory, and gamma ray device run with all ThruBit services tools.

ThruBit HRLA high-resolution laterolog array tool

Measurement by focused arrays at multiple depths of investigation enables determining and correcting for environment effects, such as shoulder beds, and calculating uninvaded formation resistivity.

ThruBit services waveform sonic tool

Monopole-acquired waveforms are processed to provide foundational compressional and shear velocities.

ThruBit services spectral gamma ray

Measurement of the total gamma ray spectra enables resolution into potassium, thorium, and uranium, which are common in sands and shales.

ThruBit Dipole through-the-bit acoustic service

Both monopole and cross-dipole waveforms and Stoneley waves are acquired for determining whether the formation is isotropic or anisotropic, which is critical information for designing well paths, completions, and fracturing stages.

ThruBit FMI through-the-bit formation microimager

Imaging and dip data providing 80% borehole coverage in 6-in hole with 0.2-in image resolution provides high-resolution structural, stratigraphic, and geomechanical understanding.

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Product Sheet ThruBit FMI Through-the-Bit Formation Microimager

A slim formation-imaging tool for conductive mud environments.

Case Study Geoengineered, Integrated Well Program Improves Oil Production by 80%–86%

Combining ThruBit services, Kinetix Shale software, and BroadBand Sequence service increases production for Lonestar Resources in the Eagle Ford Shale.

Product Sheet ThruBit HRLA

High-resolution laterolog array tool.

Tech Paper Measuring Completion Quality and Natural Fracture Indicators in Horizontal Wells Using a New Slim Dipole Sonic Memory Tool Conveyed Through the Drillstring and Bit

Engineered completion design is increasingly recognized as the optimal method for efficient stimulation of horizontal wells drilled in unconventional resource plays (Slocombe et. al., 2013 and Ajisafe et. al., 2014). Key to this design are sonic measurements acquired in lateral wells as they serve as inputs for anisotropic stress profiling and fracture characterization which are used to assess completion quality.

Industry Article Through-Bit Logging Optimizes Shale Completions

One of industry’s greatest challenges in unconventional plays–especially at today’s oil prices–lies in designing completions that increase production significantly while simultaneously controlling costs.

Product Sheet ThruBit Through-the-Bit Logging Services

Thrubit through-the-bit logging services make it possible to log geometrically complicated wells with greater reliability.