SK-TMWD Wireless Drilling Measuring Instrument

The SK-TMWD wireless measurement while drilling instrument is an upgraded MWD system compatible with the Tensor standard. It uses the industry's advanced directional sensors and gamma sensors. The main downhole parameters measured are well inclination, azimuth, gravity tool face, magnetic tool face, gravity and, magnetic field and, temperature, gamma (optional), azimuth gamma (optional), and is suitable for normal temperature and high temperature wells in conventional and unconventional oil and gas exploration and development. The SK-TMWD system adopts a modular design, which can be easily and efficiently transported and easily assembled at the drilling site.

Highlights
High-precision directional sensor, accurate and reliable measurement in the full temperature range Flexible configuration, can be connected to the lower seat key or the upper hanging pulser, adapt to complex/high temperature/large displacement/plugging/high drilling speed and other drilling parameters to enhance the well condition Real-time transmission of temperature, vibration and impact level, can be used with PWD probe to improve drilling safety Denso adopts IPC610-E standard and adopts QPack packaging for double vibration reduction Adopts flexible and efficient encoding scheme to ensure efficient transmission while extending the use time of the pulser Download of instructions: Realize real-time monitoring and change of working mode to improve environmental applicability Strong scalability: azimuth gamma, compensation resistivity, azimuth resistivity, drilling torque short section, annulus/water eye pressure, near drill bit and other joint applications.


150℃/175℃ Maximum operating temperature
20000psi Maximum operating pressure
Flexible pulse configuration Can be connected to lower seat key or upper hanging pulser

Mechanical Indicators

Probe outer diameter1.875 in.
Drill collar outer diameter3.5 in.4.75 in.6.75 in.8.25 in.9.5 in.
Drill collar type23/8in. IF31/2in. IF41/2in. API IF65/8in. API Reg75/8in. API Reg
Drill collar equivalent stiffness2.96 in. x 2.25 in.4.75 in. x 2.81 in.6.71 in. x 3.25 in.7.93 in. x 4.00 in.9.42 in. x 4.00 in.
Makeup torque3,500 lbf-ft9,600 lbf-ft30,000 lbf-ft54,000 lbf-ft62,000 lbf-ft
Working displacement75-165usgpm100-300usgpm150-800usgpm400-1200usgpm400-1200usgpm
Maximum dogleg rotation50º/100 ft15º/100 ft10º/100 ft8º/100 ft4º/100 ft
Maximum dogleg sliding100º/ 100 ft30º/ 100 ft21º/ 100 ft14º/ 100 ft7º/ 100 ft
Maximum operating temperature150ºC/175℃
Maximum temperature tolerance160ºC/185℃
Maximum working pressure20,000 Psi
Recommended sand content≤1%
Maximum plugging material content40-50 lb/bbl uniform mix


Directional sensor characteristics
Directional SensorTriaxial Fluxgate Quartz Accelerometer
Directional measurementscopeResolution (MWD)Accuracy
Well0‒180º0.1º± 0.1º
Azimuth0‒360º1.0º± 0.5º
Magnetic tool face0‒360º1.0º± 0.5º
Gravity tool face0‒360º1.0º± 0.5º
Magnetic field   0‒100 µT0.01 µT± 0.075 µT
Dip-90‒90º0.1º± 0.15º
Gravity and0‒1.000 g0.001 g± 0.001 g
Temperature SensorInternal Integration
Temperature measurement range-20 ‒ 200 ℃0.1 ℃±1 ℃


Gamma Sensor Characteristics
Storage update rate7.2 samples/ft at 50 ft/hr
Real-time update rate3.6 samples/ft at 50 ft/hr
Gamma resolution1 API
Gamma sensitivity2.5 Count/API
Minimum sampling periodDownhole storage 10s
Maximum data storage800+ hours


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