Rotary Steering System

BHA: MWD+LWD+Flex Joint+RSS Unit+Bit

Compatible with MWD, Azimuth gamma, Resistivty, PWD, S&V

TOOL SIZE	HT-4.75LWD&RSS	HT-6.75LWD&RSS	HT-9.5LWD&RSS
OD	4 3/4”	6 3/4”	9 1/2”
ID	2.845”	2.845-3.25”	3.25”
BTM CONNECTION	3-1/2”IF	4-1/2”IF	6-5/8”REG OR 7-5/8”REG
FLOW RATE	150-350GPM	225-650GPM/td>	225-1200GPM
BR	10°/30m	8°/30m	6.5°/30m
PASSAGE/ROTATE	14°/30m	10°/30m	6°/30m
HOLE SIZE	6”、6.5”	8.5”、8.75”、9.5”	12.25”、113-1/8”、17.5”
MAX. SPP	140Mpa(20000psi)
MAX. TEMP	150°C

RSS Peculiarity

（1）BPA：Smart downlink while drilling

Downlink by negative pulse, 10-15% mud flow is diverted from the bypass valve
Downlink sending and confirm by computer
More than 10,000 detailed downlink command, Inc increasement by 0.15deg
Downlink wihile drilling in 3-5minutes, no need bit off bottom
Reliable downlink, max to 8000m

（2）NO bit pressure drop issue

Compared with other RSS with same rig equipment, can increase 10-15% flow rate, to ensure well cleaning and reduce pipe stuck and well kick risks. Sterring without issue as:

- Flow rate change

- Mud properties change

- Bit noozle plug/lost

（3）Efficient push force control mode

To ensure the well trajectory control and increase ROP, it will auto adjust each sterring rib push force and achieve even vector force.
By downlink to on/off high efficiency control mode, up to 4 levels steering rib force can be reached in different formation.

BHA: MWD/LWD+Mud Motor+RSS unit+Bit
Features: Increase ROP for drilling optimization, less period to reduce drilling cost
Date transmitting by electromagnetic wave