1-11/16″ Gamma Ray Temperature CCL Tool

Slim-Profile Multi-Parameter Logging for Reliable Cased-Hole Evaluation

The 1-11/16″ Gamma Ray Temperature CCL Tool is a compact, high-precision downhole logging instrument designed for cased-hole formation evaluation, depth correlation, and thermodynamic profiling. The slim 1-11/16-inch diameter enables access to tight boreholes and narrow production tubing, while delivering natural gamma radiation, temperature, and Casing Collar Locator (CCL) measurements in a single run. This integrated tool supports essential diagnostic workflows throughout drilling, completion, and production operations - from depth correlation and lithology indication to leak detection and well integrity assessment.

Built on established wireline logging measurement principles, this tool provides repeatable, engineering-grade data that supports confident decision-making in high-stakes wellbore evaluations.

Gamma Ray Logging - Formation Signal Through Casing

Gamma ray logging detects naturally occurring gamma radiation emitted by subsurface formations. A scintillation detector - typically a sodium iodide (NaI) crystal coupled with a photomultiplier - records the intensity of gamma counts as the tool traverses the well. Differences in gamma counts correlate with formation lithology (e.g., shale vs. sandstone), enabling:

◆ Depth correlation across wells and logging runs

◆ Lithology indication through casing

◆ Identification of radioactive zones for geologic markers

For cased-hole operations, gamma ray reference data becomes a primary depth correlation log, serving as a baseline for aligning other measurements and verifying formation tops even behind multiple casing strings.

Temperature Logging - Wellbore Thermal Profiling

Temperature measurements in a wellbore provide insight into fluid movement, leak detection, and thermal anomalies. The tool incorporates an accurate PT100 temperature sensor with a linear, high-resolution response. Typical specifications include:

◆ Temperature range: –25 °C to 175 °C

◆ Precision: ±1 °C

◆ Resolution: 0.05 °C

◆ Fast response time: ≤ 1 s

This data is essential for identifying thermally sensitive events, such as cooler fluid influx (indicating communication with other zones) or temperature gradients associated with fluid migration.

Casing Collar Locator (CCL) - Depth Calibration Backbone

The CCL measurement subsystem detects changes in metal thickness at casing joints using magnetics. As the tool passes a collar, variations in the magnetic field induce a signal spike, known as a "collar kick." These spikes precisely mark collar locations, enabling absolute depth control and alignment of all other logs to true well depths.

Depth correction using CCL is fundamental in cased-hole logging workflows - especially when correlating data from different logging runs, perforation depths, or production intervals.

The multifunctional capability of this tool supports a range of critical downhole logging applications:

◆ Depth correlation for cased-hole logs-gamma ray and CCL data provide accurate depth markers.
◆ Temperature profiling for leak detection-identify abnormal gradients.
◆ Lithology indication through casing-gamma logs reflect formation facies changes.
◆ Perforation interval validation-combine gamma and CCL for perforation depth confirmation.
◆ Production analysis & reservoir monitoring-interpretable trends when combined with other logs.

Slim, versatile design for narrow wells and coiled tubing deployment.

Integrated multi-parameter measurements from a single tool run - reducing rig time and operational cost.

Engineering-graded sensor suite delivering dependable, stable data for correlation and interpretation.

Optimized for cased-hole workflows, aligning formation, temperature, and depth information with precision.

The 1-11/16″ Gamma Ray Temperature CCL Tool delivers correlated, high-resolution formation, temperature, and depth control data essential for modern well evaluation and reservoir management. The compact design and robust measurement suite make it a trusted choice for operators seeking efficient, scientifically sound logging solutions in cased-hole environments.

Request a Technical Datasheet

Hot Tags: 1-11/16″ gamma ray temperature ccl tool, China 1-11/16″ gamma ray temperature ccl tool manufacturers, suppliers, factory