Near-bit Measuring Instrument

Overview

The SNB-3000 near-bit measurement system consists of the SNB-3110 measurement sub (installed between bit and mud motor) and the SNB-3120 receiver sub. Measurement data is transmitted wirelessly across the motor, putting the sensors as close to the bit as possible for immediate formation reaction while geosteering.

Key Specifications

• Measurement sub effective length: 970 mm
• Tool sizes: 4-3/4″ and 6-3/4″
• Wireless short-hop transmission distance: approx. 9.5 m (field verified)
• Up/down (and total) gamma for thin-bed geosteering

Field Track Record

• Nearly 50 wells completed since 2019 (Shanxi, Anhui), mainly CBM horizontal wells
• Covers #3, #8, #9 and #15 high-resistivity coal seams – the main CBM development targets
• Single-run horizontal section up to 1,000 m
• Case history: SHH13-XX well, 1 m thick #9 coal seam, 430 m horizontal section (465-896 m MD), excellent communication quality with virtually zero bit errors; gamma curves enabled timely trajectory correction back into coal seam center

Contact us for the full technical datasheet.