---
title: "Downhole Probe (Survey Tool)"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DOWNHOLE_PROBE_SURVEY_TOOL"
  data_integrity_hash: "de0b49ef8cda07d192c92dad747bcc85"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:DOWNHOLE_PROBE_SURVEY_TOOL"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/downhole-probe-survey-tool.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/downhole-probe-survey-tool"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-175°C, 0-172 MPa"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 200
    unit: "°C"
    consequence: "Silicon semiconductor junction thermal runaway at 200°C, pressure housing yield strength of 414 MPa steel at 207 MPa"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Mud invasion through O-ring seals at 150°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Double redundant Kalrez perfluoroelastomer seals with 200°C rating"
  - node_2:
      trigger: "Gyroscope gimbal lock at 85° inclination"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Triaxial fiber optic gyro with ±0.01°/hr bias stability"
bom_nodes:
  sensor-module:
    type: "part"
    urn: "URN:CNFX:ME:SENSOR_MODULE"
    interface_type: "physical-logic-coupled"
  electronic-cartridge:
    type: "part"
    urn: "URN:CNFX:ME:ELECTRONIC_CARTRIDGE"
    interface_type: "physical-logic-coupled"
  pressure-housing:
    type: "part"
    urn: "URN:CNFX:ME:PRESSURE_HOUSING"
    interface_type: "physical-logic-coupled"
  connectorinterface:
    type: "component"
    urn: "URN:CNFX:ME:CONNECTORINTERFACE"
    interface_type: "physical-logic-coupled"
  battery-pack:
    type: "part"
    urn: "URN:CNFX:ME:BATTERY_PACK"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 10414-1:2008 PETROLEUM AND NATURAL GAS INDUSTRIES - FIELD TESTING OF DRILLING FLUIDS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/API RP 7G-2:2015 RECOMMENDED PRACTICE FOR DRILL STEM DESIGN AND OPERATING LIMITS"
    scope: "Verified Engineering Specification"
  - standard: "DIN 21530-1:2016 MINING - DRILLING EQUIPMENT - PART 1: TERMS AND DEFINITIONS, CLASSIFICATION"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/downhole-probe-survey-tool.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "3719823f06eef819b5f6a3459be3db076f0b1c4d4f013938658b1a04f79c56b7"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Downhole Probe (Survey Tool)

## 1. Technical Definition
A specialized sensor device deployed downhole to collect directional survey data during drilling operations.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-175°C, 0-172 MPa**. Failure boundary: **200°C thermal limit, 207 MPa pressure limit**, Mechanism: **Silicon semiconductor junction thermal runaway at 200°C, pressure housing yield strength of 414 MPa steel at 207 MPa**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Mud invasion through O-ring seals at 150°C | 8 | Electrolytic corrosion of MEMS accelerometer contacts | Double redundant Kalrez perfluoroelastomer seals with 200°C rating |
| Gyroscope gimbal lock at 85° inclination | 8 | Loss of azimuthal orientation reference | Triaxial fiber optic gyro with ±0.01°/hr bias stability |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Sensor Module](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/sensor-module.md) `(Standalone System)`
- [Electronic Cartridge](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/electronic-cartridge.md) `(Standalone System)`
- [Pressure Housing](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pressure-housing.md) `(Standalone System)`
- [Battery Pack](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/battery-pack.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Drilling Rig**, **Mud Circulation System**, **Data Acquisition Unit**  
**Downstream Applications**: Directional Wellbore Survey, Geosteering Data, Formation Evaluation Report  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials ensure the downhole probe's durability in harsh drilling environments?
**A**: 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.

### Q: How does the sensor module in this downhole probe maintain accuracy under high pressure?
**A**: 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.

### Q: What maintenance is required for the battery pack in this downhole survey tool?
**A**: 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.

## 6. Manufacturing Compliance
- 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

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Downhole Probe (Survey Tool)](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/downhole-probe-survey-tool)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: DOWNHOLE_PROBE_SURVEY_TOOL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 5665c321
