|Place of Origin:||China|
Small Diameter Measurement While Drilling (MWD-Φ38mm)
Small Diameter Measurement While Drilling (MWD-Φ38mm) is a kind of small-path mud pulse wireless in-drilling inclinometer. This is a new product developed following the ER-MWD48 Measurement While Drilling . This product not only inherited the characteristics of high precision, high stability and high vibration resistance of the ER-MWD48inclinometer, but also more extensive applications.
1.ER-MWD38S Measurement While Drilling can be used for the construction of conventional wellbore like the ER-MWD48 Measurement While Drilling . Different diameters can be selected according to the conditions of on-site drilling tools (diameter of the drill collar Ф50.8mm, Ф71.4mm) Rubber wings to suit different drilling tools.
2.The external diameter of the instrument is Ф38mm. In the construction of small wellbore, the hole of the non-magnetic drilling tool may not be reamed (diameter of the drill collar is Ф50.8mm), which reduces the erosion of the drilling tool and enhances the safety of the downhole drilling tool.
3.When used in conventional large borehole construction, the muddy water circulation area of the non-magnetic drill collar is relatively increased, erosion of the drilling equipment and drilling tool is reduced, and the safety construction of the well team is facilitated.
4.It is more suitable for the second and third development of oil wells and small hole operations such as window sidetrack drilling. Also suitable for use with coiled tubing to connect MWD.
5.The underground electrical connection adopts self-locking air plug + cord connection, which makes the instrument connection convenient and reliable, and improves the reliability of the instrument.
6.The electronic chamber of the pulse generator and the gamma probe share a compression cylinder. The user can select conventional gamma or orientation gamma. Became one of the first manufacturers in China to use the Ф38mm outer diameter directional gamma wireless MWD system.
7.ER-MWD48 and ER-MWD38S are compatible with ground equipment, reducing the cost of using.
8.Ground equipment can be selected for wireless or wired transmission.
|Parameter||Measuring range & accuracy|
|Inclination||0 – 180°/±0.1°|
|Azimuth||0 – 360°/±1°|
|Tool Face Angle||0 – 360°/±2°|
|Pulse Type||Positive pulse|
The gamma probe is integrated in the pulsar and is approximately
1500mm closer to the drill than the conventional gamma short
section (optional gamma orientation)
|Outside Diameter||38.1mm/1.5”(Pulse section-48mm/1.875”)|
|Downhole Power Supply||Lithium battery 21-28.8V DC(Can connect two battery segments)|
|Battery Life||Single battery more than 1300 hours|
|Impact Resistance||1000g, 0.5msec(Half shaft sine wave)|
|Anti-vibration||20g RMS 15-500Hz|
|Pressure Tube||100 MPa|
|Temperature Limit||0℃ - 125℃|
|Total Length of Downhole Tool String||6.0m(No gamma) ; 6.7m(With gamma)|
|Instrument Pressure Drop||(50～200)PSI|
|Mud Sediment Content||≤1%|
|Mud Weight||≤2.2 g/cm3|
|Mud Viscosity (Funnel Viscosity)||≤140s|
|Mud Signal Strength||(50～100)PSI|
|Adaptable to DrillCollar||3.125”～8”|