Structured Manufacturing Data (2026)

Downhole Probe (Survey Tool)

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Downhole Probe (Survey Tool) used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Downhole Probe (Survey Tool) is characterized by the integration of Sensor Module and Electronic Cartridge. In industrial production environments, manufacturers listed on CNFX commonly emphasize High-strength alloy steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A specialized sensor device deployed downhole to collect directional survey data during drilling operations.

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Product Specifications

Technical details and manufacturing context for Downhole Probe (Survey Tool)

Definition
A downhole probe, also known as a survey tool, is a critical component of a directional survey system used in oil and gas, mining, and geotechnical drilling. It is lowered into the borehole to measure and transmit real-time data on the wellbore's inclination, azimuth (direction), and sometimes toolface orientation. This data is essential for ensuring the drill string follows the planned trajectory, enabling precise directional drilling, well placement, and geological evaluation.
Working Principle
The probe contains inertial sensors (such as accelerometers and magnetometers or gyroscopes) housed in a pressure-resistant casing. As it travels downhole, these sensors measure the Earth's gravitational and magnetic fields relative to the tool's orientation. This raw sensor data is processed by an onboard electronic package to calculate the borehole's inclination and azimuth. The data is either stored in memory for later retrieval or transmitted in real-time to the surface via mud pulse telemetry, electromagnetic signals, or wired pipe.
Common Materials
High-strength alloy steel, Non-magnetic stainless steel (for sensor housing), Pressure-resistant elastomers (for seals), Electronic components (PCBs, sensors)
Technical Parameters
  • Outer diameter (OD), critical for fitting within the drill collar or borehole restrictions. (mm) Per Request
Components / BOM
  • Sensor Module
    Houses the accelerometers and magnetometers/gyros that measure inclination and azimuth.
    Material: Non-magnetic stainless steel
  • Electronic Cartridge
    Processes raw sensor data, performs calculations, and manages data storage/transmission.
    Material: Printed Circuit Boards (PCBs), electronic components
  • Pressure Housing
    Protects internal components from extreme downhole pressure and fluids.
    Material: High-strength alloy steel
  • Connector/Interface Part
    Provides electrical connection to the rest of the survey system or telemetry module.
    Material: Corrosion-resistant alloy, elastomer seals
  • Battery Pack
    Powers the probe's electronics during downhole operation (for memory tools).
    Material: Lithium-based cells, housing

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Downhole Probe (Survey Tool).

Survey Probe Directional Survey Tool MWD Probe directional survey downhole probe high-strength alloy steel drilling sensor pressure-resistant downhole survey tool non-magnetic stainless steel sensor housing downhole probe battery pack replacement

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Survey System
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 25,000 psi
flow rate: 0-500 gpm
temperature: -40°C to 175°C
slurry concentration: Up to 15% solids by weight
Media Compatibility
✓ Water-based drilling mud ✓ Oil-based drilling mud ✓ Synthetic-based drilling fluid
Unsuitable: High H2S concentration environments (>500 ppm)
Sizing Data Required
  • Hole diameter (in inches)
  • Maximum dogleg severity (degrees per 100 ft)
  • Required survey accuracy (degrees)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Electronic Component Degradation
Cause: Exposure to high temperatures and pressure cycling in downhole environments, leading to thermal stress, solder joint fatigue, and insulation breakdown in sensors and circuitry.
Mechanical Seal Failure
Cause: Abrasive particles in drilling fluids causing wear on dynamic seals, combined with pressure differentials that exceed seal design limits, resulting in fluid ingress and sensor contamination.
Maintenance Indicators
  • Erratic or inconsistent survey data readings during calibration checks
  • Visible fluid contamination in the probe's pressure compensation system or external damage to housing seals
Engineering Tips
  • Implement rigorous pre-deployment pressure testing and thermal cycling protocols to validate seal integrity and electronic stability before each downhole run
  • Establish a strict post-run maintenance routine including thorough cleaning with compatible solvents, detailed inspection of all seals and connectors, and controlled storage in temperature-regulated environments

Compliance & Manufacturing Standards

Reference Standards
ISO 10414-1:2008 Petroleum and natural gas industries - Field testing of drilling fluids ANSI/API RP 7G-2:2015 Recommended Practice for Drill Stem Design and Operating Limits DIN 21530-1:2016 Mining - Drilling equipment - Part 1: Terms and definitions, classification
Manufacturing Precision
  • Bore diameter: +/-0.025mm
  • Axial alignment: 0.05mm per 100mm length
Quality Inspection
  • Hydrostatic pressure test to 150% of maximum operating pressure
  • Magnetic particle inspection for surface cracks

Factories Producing Downhole Probe (Survey Tool)

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials ensure the downhole probe's durability in harsh drilling environments?

The probe uses high-strength alloy steel for structural integrity, non-magnetic stainless steel for sensor housing to prevent interference, pressure-resistant elastomers for seals, and robust electronic components designed for extreme conditions.

How does the sensor module in this downhole probe maintain accuracy under high pressure?

The sensor module is housed in non-magnetic stainless steel within a pressure-resistant housing, utilizing specialized calibration and shielding to ensure precise directional survey data collection even at extreme downhole pressures.

What maintenance is required for the battery pack in this downhole survey tool?

The battery pack is designed for extended downhole operation with minimal maintenance. Regular inspection for seal integrity and scheduled replacements based on usage cycles are recommended to ensure uninterrupted survey data collection.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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