Production Dual Calliper

The CNPS Dual X-Y caliper is run centralized in the Production Logging tool string. The caliper incorporates proven roller centralizer technology and has a pair of caliper arm mechanisms set at 90 degrees to each other to measure casing inside diameter in the X and Y axes.



The caliper is spring loaded and follows tubing ID while running in hole. It opens fully on leaving the tubing to enter the casing. Each arm operates as an independent unit exerting a constant radial force in any casing diameter. LVDT sensors protected within the main shaft accurately measure by induction the position of the coupled collars external to the shaft. The position of the collar blocks are related to the tubing ID.



Determination of X-Y diameters at 90 Measuring of casing deformation and major Detection of scale build up in casing and Correction of spinner derived fluid velocity for varying casing or open hole completion diameter. Identifying ID to correlate with changes in holdup interfacing & tool combinations Simultaneous Operation with other Production Logging 1 3/16 UN 12 upper and lower thread. Sondex Compatible and OPTIONS Springbow version for open hole Ultrawire™(UW) toolbus or Memory toolbus (Mbus). Special heads to suit customer specification. Extended arms to increase range to suit customer.



PDC Telemetry XTU or UMT

Pressure(max) 105MPa

Temperature(max) 177°C

Measurement Range 2″ – 9″ diameter

Resolution 0.015”

Accuracy 0.1″ < 150°C 0.2″ < 165°C 0.3″ <177°C

Voltage(nominal) 18VDC

Current <24mA

Length 952mm

Measure Point 9.75-11.25″(X) 6.75-8.25″ (Y)

Diameter 43mm

Weight 6.6kg

Material Corrosion Resistance Throughout End Thread(top/bottom) 13/16″ 12 UN2A GO End connector(top/bottom) 4mm single banana connector

Weight 1 kg


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