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M/LWD System

Scope of Application:

M/LWD System is applicable to the directional drilling of 4 3/4 〞-26〞wells and it is especially applicable to the measurement while drilling on high temperature deep well and small size well.

Technical Principle：

The positive pressure signals generated by downhole MWD tools are transmitted to the surface pressure transducer through mud, detected by surface equipment and decoded into useful data by surface computer”;

Technical Features：

(1)Setting key type downhole instrument structure, fishable and reset key;

(2)Real time parameters like downhole instrument battery voltage, temperature and vibration can be recorded.”

(3)Long battery life, highly reliable system and low maintenance charge;

(4)Gama logging can be carried out in the meantime.

Technical Indicators

Major Parameters of Directional Exploring Tube
Parameters	Measuring range	Measuring accuracy
Well inclination angle	0～180°	±0.1°
Azimuthal angle	0～360°	±1°
Tool face angle	0～360°	±1°
Magnetic field intensity	0～100μT	±0.3μT
Magnetic inclination	-90～90°	±0.3°
Gravity	0.8～1.2g	±0.0015g
Temperature	175℃	±1℃

Major Parameters of GR Exploring Tube
Maximum operating temperature	175℃
Maximum operating pressure	22000Psi（152MPa)
Gama measurement range	0～500API
Gama measurement accuracy	±2API＠50API
Gama vertical resolution	152mm

Service Ability and Performance：

The company is capable of providing services like ultra-deep well side tracking and horizontal well steering technology. In 2011, the company constructed 2 directional wells with large inclination, high temperature and high pressure at an oil field in Sichuan successively. The total depth is 7350 m and the maximum well inclination is 81°.