(PWD) Sensor

MEASUREMENT/LOGGING WHILE DRILLING
Pressure-While-Drilling (PWD) Sensor
Optimizing drilling efficiency
Sperry Drilling services’ pressure-while-drilling (PWD)
sensor boosts drilling efficiency by providing crucial, real-time
downhole pressure information that allows you to make faster
and better drilling decisions.
Communication
port
The PWD service, part of the ADT® optimization service tool
kit, provides accurate annular pressure, internal pressure, and
temperature measurements using any of our telemetry systems:
positive mud pulse, negative mud pulse, and electromagnetic.
Pressure data can be transmitted in real time and recorded in
downhole memory. In the pumps-off mode, the minimum,
maximum, and average pressures observed during the
noncirculating period are transmitted via mud pulse telemetry
when circulation recommences. These measurements provide the
knowledge to avoid lost circulation and detect flow/kicks before
they happen. The PWD sensor also reduces the risk of problems
caused by unexpected fracture or collapse.
Electronics
section
Transducer
section
B
Annular pressure
port
B
Section B - B
Internal
guage
Port
Annular
guage
fluid parameters and operating procedures can be modified to
improve hole-cleaning efficiency. On extended-reach wells,
real-time information helps to maintain wellbore pressures
between safe operating limits and to monitor hole cleaning.
The PWD sensor also provides early detection of well flows and
kicks. In deepwater riserless drilling, an increase in annular
pressure indicates the likelihood of a shallow water flow. A drop
in pressure, on the other hand, can indicate gas, oil, and water
kicks. Because the sensor is making its measurement downhole,
the PWD sensor makes it possible to detect such pressure drops
earlier than more traditional surface measurements.
Annular pressure increases often reflect ineffective cuttings
removal and poor hole cleaning, both of which can lead to lost
circulation. The PWD sensor detects the increase, and drilling
The PWD sensor has high-accuracy quartz gauges and is able
to record data because of its battery-powered operation. It is
also extremely useful in specialized drilling environments,
such as high-pressure/high-temperature, extended-reach,
and deepwater wells.
HAL9062
When combined with the InSite® rig management system, surface
and downhole measurements can be compared for more accurate
and extensive analysis.
Sperry Drilling’s PWD sensor provides annular pressure, internal
pressure, and temperature measurements in real time. The sensor
reduces the risk of unexpected fracture or collapse
For a more complete downhole picture, Sperry Drilling’s Replay™
service can provide operators with a “snapshot” of high-density data
on command. The Replay service enhances Sperry’s PWD sensor
using the Geo-Span® downlink system, where commands can be
sent to the downhole tools to initiate high-density data recording
and transmission. Once the Geo-Span downlink service sends the
command from the surface, high-density annular pressure data is
stored during LOT (leak-off test) or pumps-off operations, and then
transmitted to surface as circulation is resumed.
HAL16611
Port
MEASUREMENT/LOGGING WHILE DRILLING
PWD® Sensor Specifications
SAMPLE
4-3/4 inch
6-3/4 inch
Nominal Tool OD
4-3/4 in. / 120.65 mm
6-3/4 in. / 171.45 mm
Maximum Body OD
4-3/4 in. / 120.65 mm
6-3/4 in. / 171.45 mm
6 in. to 8-1/2 in. /
152.40 mm to 215.90 mm
8-1/2 in. to 10-3/4 in. /
215.90 mm to 273.05 mm
10-3/4 in. to 26 in. /
273.05 mm to 660.40 mm
10-3/4 in. to 26 in. /
273.05 mm to 660.40 mm
12-1/4 in. to 48 in. /
311.15 mm to 1,219.2 mm
2.37 in. / 60.20 mm
Hole Size Range
Collar ID
8 inch
8 inch HF
8 in. / 203.20 mm
8 in. / 203.20 mm
9-1/2 inch
8 in. / 203.20 mm
9-1/2 in. / 241.30 mm
8 in. / 203.20 mm
9-1/2 in. / 241.30 mm
1.25 in. / 31.75 mm
1.905 in. / 48.39 mm
1.92 in. / 48.77 mm
2.37 in. / 60.20 mm
Length
9.23 ft / 2.81 m
4.44 ft / 1.35 m
4.44 ft / 1.35 m
4.37 ft / 1.33 m
4.37 ft / 1.33 m
Weight
47.9 lbm / 21.73 kgm
96.3 lbm / 43.68 kgm
143 lbm / 64.86 kgm
133.8 lbm / 60.69 kgm
213.2 lbm / 96.71 kgm
NC38 Box
NC38 Pin
NC50 Box
NC50 Pin
6 5/8-in. Reg Box
6 5/8-in. Reg Pin
6 5/8-in. Reg Box
6 5/8-in. Reg Pin
7 5/8-in. Reg Box
7 5/8-in. Reg Pin
9,900 to 10,000 lbf.ft
1,342.3 to 1,355.8 daN.m
30,000 to 32,000 lbf.ft
4,067.5 to 4,338.6 daN.m
52,000 to 56,000 lbf.ft
7,050.3 to 7,592.6 daN.m
43,000 to 48,000 lbf.ft
5,830.0 to 6,507.9 daN.m
87,000 to 89,000 lbf.ft
11,795.6 to 12,066.8 daN.m
8° per 100 ft / 8° per 30 m
14° per 100 ft / 14° per 30 m
8° per 100 ft / 8° per 30 m
14° per 100 ft / 14° per 30 m
8° per 100 ft / 8° per 30 m
14° per 100 ft / 14° per 30 m
Connections
Make-up Torque
Maximum Dogleg Severity
(surcharges for higher doglegs)
Rotating
Nonrotating
14° per 100 ft / 14° per 30 m 10° per 100 ft / 10° per 30 m
30° per 100 ft / 30° per 30 m 21° per 100 ft / 21° per 30 m
Maximum Operating Temperature
150°C / 302°F
Maximum Operating Pressure
Maximum Mass Flow Rate - gpm x ppg
- l/min x sg
18,000 psi / 124.1 Mpa
18,000 psi / 124.1 Mpa
18,000 psi / 124.1 Mpa
13,500 psi / 93.1 Mpa
13,500 psi / 93.1 Mpa
3,750 lb/min
1,700 kg/min
10,000 lb/min
4,535 kg/min
10,000 lb/min
4,535 kg/min
20,000 lb/min
9, 070 kg/min
20,000 lb/min
9,070 kg/min
60,000 lbf / 26,689.3 daN.m
75,000 lbf / 33,361.7 daN.m
Maximum Sand Content
2%
Maximum RPM
180
Maximum Weight on Bit
25,000 lbf / 11,120.6 daN.m
45,000 lbf / 20,017.0 daN.m
Lateral Vibration
60,000 lbf / 26,689.3 daN.m
10 minutes @ peak shock level of 90 g
Axial Vibration
7 minutes @ peak shock level of 40 g
Sensor Measure Point from Bottom of Tool
66.24 in. / 168.20 cm
13.51 in. / 34.32 cm
13.01 in. / 33.05 cm
13.01 in. / 33.05 cm
12.02 in. / 30.53 cm
Measurement Specifications
Detector Type
Quartz
Measurement Range
0 to 22,500 psi / 0 to 155.1 MPa
Measurement Accuracy
11.25 psi / 0.08 MPa at full scale
For more information, contact us at [email protected]
© 2014 Halliburton. All rights reserved. Sales of Halliburton products and services will be in accord solely with the terms and conditions contained in the
contract between Halliburton and the customer that is applicable to the sale.
H02986 7/14
www.halliburton.com

Download Report