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Electromagnetic Defectscope

Electromagnetic Defectscope

SITAN DTS series Electromagnetic Defectscope is used to detect the casing thickness, corrosion, deformation, cracks etc. in the oil tubing, indicating downhole tubular structure, tool location and detecting the ferromagnetic material (such as casing centralizers, surface casing, etc.) outside...

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Product Details

SITAN DTS series Electromagnetic Defectscope is used to detect the casing thickness, corrosion, deformation, cracks etc. in the oil tubing, indicating downhole tubular structure, tool location and detecting the ferromagnetic material (such as casing centralizers, surface casing, etc.) outside casing.

Due to the unique structure and measurement principle, SITAN DTS series electromagnetic defectscope can finish the logging tasks during normal production of oil and water wells, reducing operating cost in inspection and increasing efficiency, can timely judge the structural damage of cased wells. 

Applications

Identify crack-type defects (longitudinal and transversal joint), crack defects, pipe wall corrosion, mechanical wear section, explosion perforation section and the disjoint of sieve tube and collar.

Double column testing.

Log the position of all collars of double column, getting the complete location image of all pipes along the well direction, and the location of casing shoe, packer and valve.

Make logging without oil production stopping. The paraffin and cement block have no effect on the logging.

Match with other casing logging instruments such as multi-finger imaging tool (MIT) , the combined results can reflect and explain the well condition.

Features

Full function: The defects and thickness of oil tube and casing, temperature and nature gamma parameters, etc. can be measured in just one downhole trip.

Easy maintenance: simple mechanical structure, easy disassembly and easy maintenance.

Various operating modes: cascade connection, connection with multi-finger caliper (MFC), etc. or independent operating.

Specifications

Maximum temperature

177℃

Maximum pressure

103.4MPa15000psi

Tool OD

43mm1.69in

Tool length

2300mm

Tool weight

10Kgs

Operating voltage

(90±8) VDC/18VDC

Operating currency

(135±5)mA/(550±50)mA

Maximum logging speed

400m/h

Measuring range of pipe   diameter

(62324)mm2.44in~12.75 in

Measuring range of   single pipe thickness

(312)mm0.11in~12.75 in

Total maximum thickness   of double pipes

25 mm0.98in

Measuring error of   single pipe thickness

0.5mm0.019in

Measuring error of   casing through tubing

1.5mm0.059in


Minimum length of longitudinal damage

50mm1.96in 2.5in single pipe

70mm2.75in5.5in single pipe

150mm5.90in.5.5in casing through tubing

Minimum length of transversal damage

1/4 circumference

Minimum diameter hole damage

30mm1.18in

Measuring range of Gamma

02000cps

Gamma sensitivity

1cps

Measuring range of temperature

-40177

Temperature resolution

0.1

Temperature accuracy

1

Housing material

TC4

 

Patent

22. SITAN Electromagnetic Defectscope patent certificate

Case Study

Case 1: Jilin well, there is a crack at 84m, and fracture at 92m.

             SITAN Electromagnetic Defectscope Logging curve

23. SITAN Electromagnetic Defectscope Logging curve

Case 2: Huaibei oilfield Niudong 1 well with highest temperature 170℃

             SITAN Electromagnetic Defectscope Logging curve

24. SITAN Electromagnetic Defectscope Logging curve

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