ImPulse Integrated MWD platform APPLICATIONS ■ Real-time survey, gamma ray, and resistivity measurements ■
Invasion profiles
BENEFIT ■ Reliable, precise, real-time directional measurements that save rig time and minimize doglegs FEATURES ■ Real-time (0.5–6 Bps) and memory data ■
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Azimuthal gamma ray 10 multidepth resistivities (five phase and five attenuation)
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Toolface
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Direction and inclination
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Real-time density and porosity with adnVISION* azimuthal density neutron service
Real-time formation evaluation The ImPulse* integrated MWD platform is designed to meet slimhole measurement demands where formation evaluation is needed in real time. It comprises both MWD and the resistivity components of the arcVISION475* 4¾-in drill collar resistivity service. The standard ImPulse platform provides survey, gamma ray, and resistivity measurements for 5¾- to 6¾-in hole sizes. This measured data is transmitted at rates up to 6 Bps with a state-of-the-art telemetry telemetry system, setting industry standards.
Continuous direction and inclination The ImPulse platform provides continuous direction and inclination (D&I) data while drilling, using a D&I package just 12.6 ft from the platform’s base. Surveying quality control is memorized in the tool, check checked ed downhole downhole,, and tran transmitt smitted ed in the quicke quickest st possibl possible e mode. mode.
Precise directional control For precise directional control, AIM* at-bit inclination measurements are transmitted using inductive telemetry around the PowerPak* steerable motor to a receiving antenna located on the ImPuls ImPulse e platfor platform. m. This This provid provides es instant instantaneous aneous infor informati mation on for for absolut absolute e control control of well well trajector traj ectoryy and bit direc direction. tion.
Multiple depths of investigatio investigation n
Downhole power generation with mud turbine
The ImPulse platform measures formation resistivities at multiple depths of investigation, using an electromagnetic antenna array of five transmitters and two receivers. The receivers are strategically placed above and below the transmitters to achieve true borehole-compensated formation resistivity. This technology is capable of measuring formation resistivities up to 3,000 ohms with dielectric processing above 200 ohms.
High tolerance to lost circulation material
Combinable with other tools
Compact, integrated design with sensors close to bit
The ImPulse platform is combinable with VPWD* collar-mounted telemetry and surveying systems, which measure internal and annular pressures and provide battery power that is used to obtain obtain loggi logging ng data data while while trip tripping ping out of the the hole. hole. The The ImPulse ImPulse plat platform form is also also combinabl combinable e with with the adnVIS adnVISION ION azimu azimuthal thal densit densityy neutron neutron servi service ce for for complete complete forma formation tion evalu evaluation ation in real real time. time.
Phase caliper in water-base mud
Multidepth Resistivity Measurements 60 n i , n o i t a g i t s e v n i f o h t p e D
Deep resistivity: 34-in spacing 28-in spacing 22-in spacing 16-in spacing 10-in spacing Shallow resistivity: 34-in spacing 28-in spacing 22-in spacing 16-in spacing 10-in spacing
50 40 30 20 10 0 1
10
100
Resistivity, ohm.m The ImPulse platform integrates zero-gap modulation techniques with multidepth 2-MHz resistivity measurements to meet the demands of directional drilling with a 4¾-in BHA.
ImPulse Measurement Specifications Direction and Inclination Survey Direction Stationary Range 0° to 360° Accuracy ±1° (above 5° inclination) Resolution 0.5° Inclination Range 0° to 180° Accuracy ±0.1° Resolution 0.03° Magnetic toolface (MTF) and gravity toolface (GTF)† Range 0° to 360° Accuracy ±2° Resolution 6° Resistivity Depth of Investigation and Vertical Resolution Spacing 10 in 16 in 22 in Measurement Range Phase resistivity 0.2–200 ohm.m 0.2–200 ohm.m 0.2–200 ohm.m Attenuation 0.2–20 ohm.m 0.2–30 ohm.m 0.2–50 ohm.m Accuracy Phase resistivity Below 60 ohm.m: ±3%, and above 60 ohm.m ±0.5 ohm.m/m Attenuation Below 25 ohm.m: ±5%, and above 25 ohm.m ±2 ohm.m/m Vertical Resolution Phase resistivity 0.7 ft at 0.2 oh.m, and 2 ft at 200 ohm.m Attenuation 1 ft at 0.2 ohm.m, and 8 ft at 50 ohm.m Gamma Ray Range 0–250 gAPI Accuracy ±3% Statistical repeatability ±2 gAPI at 100 gAPI and 100 ft/h, 3-point average Vertical resolution 6 in
Continuous 0° to 360° ±2° 1° 0° to 180° ±0.2° 0.10°
28 in
34 in
0.2–200 ohm.m 0.2–50 ohm.m
0.2–200 ohm.m 0.2–50 ohm.m
General Specifications Collar Dimensions Nominal diameter Maximum diameter Tool Length and Weight Nominal length Operation Hole size Max. operating temperature Data rate (physical) Frequency range
4.75 in 5.25 in
Top thread connection Bottom thread connection
NC-38 (31 ⁄ 2 in IF) box NC-38 (31 ⁄ 2 in IF) pin
32 ft
Nominal weight in air
1,600 lbm
53 ⁄ 4–63 ⁄ 4 i inn 150 degC [300 degF] 0.5 to 6 Bps 0.5 to 12 Hz
Power supply Real-time telemetry Memory size
MWD turbine Continuous wave (mud siren) 2 MB
15°/100 ft
Sliding mode
30°/100 ft
2.04 2.01
Equivalent bending stiffness Average moment of inertia
38.5 ft 20 in4
30,000 lbf 300,000 lbf
Joint yield torque
8,800 ft.lbf
20,000 psi 130 to 360 galUS/min
Pressure drop constant (C)
6,000
3% 9% 10%
Max. solids concentration in mud Max. LCM size Max. LCM concentration
20% Medium nutplug 50 ppb
Mechanical Specifications
The ImPulse tool.
Dogleg Severity Rotary mode Bending strength ratio (BSR) Top connection Bottom connection Axial and Rotational Load Maximum weight on bit Maximum jarring load Hydraulics Maximum operating pressure Full flow range Operating Environment Max. mud sand content Max. silicate concentration in mud Max. salt concentration in mud †Minimum
update rate: 3.5 s at 1.5 Bps or greater.
www.slb.com/Pulse *Mark of Schlumberger Other company, product, and service names are the properties of their respective owners. Copyright © 2012 Schlumberger. All rights reserved. 11-DR-0269
