SY/T 7798-2024 in English
VALIDDrilling Rotary Wall Coring Instrument
- Issued on:2024-09-24
- Implemented on:2025-03-24
- File Format:PDF
- Delivery:Via email within 1~3 business days
$291.00
| Standard No: | SY/T 7798-2024 |
| Document status: | VALID |
| Title in English: | Drilling Rotary Wall Coring Instrument |
| Title in Chinese: | 钻进式旋转井壁取心仪 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2024-09-24 |
| Implemented on: | 2025-03-24 |
| ICS Classification: | 75.180.10-Exploratory and extraction equipment |
| Chinese Classification: | E91-Petroleum exploration logging equipment and instrument |
| Professional Classification: | SY-Oil & Gas |
| Related Keywords: | rotary wall coring instrument introduction analysis
rotary wellbore pressure group group a environmental adaptability classification temperature group group a temperature group |
Introduction
Analysis of the core content of the standard
This technical standard aims at the full life cycle management requirements of the drilling rotary wellbore coring instrument, forming a complete specification system from design and manufacturing to transportation and storage. The instrument is divided into two categories according to the inner diameter of the coring drill bit: Type I (24-26mm) and Type II (36-40mm), which correspond to different operating scenario requirements.
Comparison of key technical indicators
| Performance parameters | Type I requirements | Type II requirements |
|---|---|---|
| Time for single core | ≤3 minutes | ≤5 minutes |
| Minimum output torque (N·m) | 3 | 4 |
| Power requirement (W) | 250 | 350 |
Environmental adaptability classification
Temperature group
- Group A: 155℃
- Group D: 235℃ (highest level)
Pressure group
- Group A: 100MPa
- Group D: 170MPa
Key test methods
High temperature and high pressure composite test
Functional verification must be carried out under constant temperature and pressure conditions for 1 hour. The test parameters must meet the requirements of both 5.2.1 Temperature group and 5.2.2 Pressure group.
MTBF calculation method
The mean time between failures is calculated using the formula: $$\mathbf{MTBF}{=}\frac{1}{N}\sum_{j=1}^{N}t_{i}$$, requiring the test sample size to be ≥3 units, and the total test time to cover the 200 hours baseline.
Implementation recommendations
Maintenance cycle
During storage, a power-on inspection is required every 6 months, and the ambient humidity should be controlled at ≤90%.
Key points of quality control
- Factory inspection must include 11 mandatory inspection items such as coring performance and pushing force
- Type inspection sampling is based on 1-3% of the production batch
- Focus on the 10% length error threshold of the core detection module
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