Bench Tree

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Bench Tree HPR Resistivity Tool

The Bench Tree HPR Resistivity Tool is designed to provide performance and accuracy while reducing maintenance and operation costs. Its simplified design, with signal and processing power in one package, has fewer connection points for higher reliability. The unique Bench Tree design allows it to be run on virtually any LWD architecture.

The Bench Tree HPR multi-frequency and multi-spacing wave propagation LWD tool provides accurate resistivity measurements under a broad range of formation properties and temperatures. The latest advanced digital electronics, symmetrical compensation and clever mechanical design enables accurate and stable measurements at low and high formation resistivities. With a flat response throughout its operating temperature range (up to 175 °C) it exceeds the capabilities of many other tools.

Bench Tree HPR Resistivity Tool

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Specifications

Mechanical & Environmental 475 650 800
Collar Length, max, ft (mm) 18.7 (5,690) 20.1 (6,121) 20.1 (6,121)
Connections (top & bottom) 3-1/2 API IF Box 4-1/2 API IF Box 6-5/8 API Regular Box
Max Dogleg, rotating, deg/100 ft 14 12 10
Max Dogleg, sliding, deg/100 ft 28 24 20
Max pressure, ksi 15 or 20 15 or 20 15 or 20
Max temperature, °F (°C) 347 (175) 347 (175) 347 (175)
Measurement Phase Attenuation
Measurement Range (both spacing) (ohm-m) 0.1 to 4,000 0.1 to 200
Accuracy (mmho/m) ±0.25 ±0.50
Diameter of Investigation
Phase 2 MHz 28 in 2 MHz 48 in 400 kHz 28 in 400 kHz 48 in
0.2 ohm-m 21 in 30 in 30 in 41 in
2 ohm-m 34 in 47 in 48 in 64 in
20 ohm-m 53 in 74 in 68 in 98 in
200 ohm-m 73 in 109 in 83 in 128 in
2000 ohm-m 87 in 137 in 90 in 144 in
Attenuation 2 MHz 28 in 2 MHz 48 in 400 kHz 28 in 400 kHz 48 in
0.2 ohm-m 33 in 44 in 48 in 63 in
2 ohm-m 56 in 73 in 83 in 107 in
20 ohm-m 100 in 125 in 167 in 199 in
200 ohm-m 216 in 250 in 408 in 449 in