AntonOil has experienced experts and engineers specialized in directional and horizontal drilling, advanced MWD/LWD equipments, directional well design/simulation software, and imported non-magnetic drill collars in various sizes. We can perform directional drilling services under complicated conditions, such as large/medium/small radius and HTHP, and offer extensive technical services with high quality, economical, efficient and reliable manner.
1. Services scope
■ Directional/cluster well drilling technology.
■ Horizontal well drilling technology.
■ Small-radius horizontal drilling technology.
■ Casing exiting technology.
■ Multilateral drilling and completion technology.
■ Rotary steering drilling technology.
■ Geosteering drilling technology.
2. Equipments
10 MWD/LWD equipments manufactured by GE Corporation (tensor).
The system has the following features:
■ Reliable: 2000h continuously without failure .
■ High temperature: working tem@165℃, with limited @ 175℃.
■ Applicable hole size: 118mm -444.5mm. (4 5/8”~171/2)”
■ Signal transmission mode: positive pulse convoyed by mud.
■ Surface equipment: Reliable software/fixed communication system, easy screen setting.
■ Easy operation.
◆ Switch downhole working mode at surface .
◆ Long battery life (250h), low power consumption and high temperature resistance up to 175℃.
◆ Modular design for easy mobilization and assemble
◆ Reliable receiver and decoding system
■Drifting (complementary logging after MAD drilling): resistivity system (including GR logging unit) can log and record independently with its own battery. The geologic data will be record in Centerfire resistivity sub during drifting and tripping Storage space is 14M.
■Non-magnetic drilling collar size:2⅞in ~9in
|
Size of Drilling tool in |
I.D. mm |
Centralizer |
Displacement 1/s |
Restrictor ring |
|
2⅞ Non-magnetic anti-Compression drill pipe57Finned |
57 |
Finned or Bow |
6~12 |
1.28~1.35 |
|
3½ Non-magnetic anti-Compression drill pipe57Finned |
57 |
Finned or Bow |
6~18 |
1.28~1.35 |
|
4¾ Non-magnetic drill collar |
57 |
Finned or Bow |
6~18 |
1.28~1.35 |
|
6½ Non-magnetic drill collar |
71 |
Bow Springs |
28~36 |
1.35~1.40 |
|
6¾ Non-magnetic drill collar |
71 |
Bow Springs |
28~36 |
1.35~1.40 |
|
8 Non-magnetic drill collar |
82 |
Bow Springs |
45~60 |
1.40~1.50 |
|
9 Non-magnetic drill collar |
86 |
Bow Springs |
55~75 |
1.50~1.60 |
3. Specifications
MWD
| Hole deviation angle |
Measuring range0°~180°、measuring accuracy±0.1° |
| Azimuth |
Measuring range0°~360°、measuring accuracy±0.25° |
| Tool face |
Measuring range0°~360°、measuring accuracy±0.5° |
| O.D. of downhole tool44 |
44.5mm |
| Shock/vibration-resistance ability of BHAs |
Shock resistance：1000g，0.5ms，(1/2all-axis sine wave），vibration resistance：30GRMS（20~200Hz，all-axis） |
| Length of BHAs |
Directional probe：2.28m，battery：1.78m，gamma probe tube：1.51m，pulse generator：2.61m |
| Downhole working limitation |
Temperature resistance175℃，pressure resistance140MPa |
| Applicable to super-short radius horizontal well |
Borehole curvature：3°/m |
| Rate range |
6L/s~75L/s |
| Max. data Volume |
Directional probe16M，resistivity sub14M |
Dual-frequency resistivity
| Measuring principle |
Phase angle and amplitude measurement propagated by electromagnetic wave |
| Type of Measurement |
Transmitting and receiving antenna, free setting of dual-phase and dual -frequency.
|
| Resistivity sub |
O.D. of antenna6.91in，O.D. of wear ring7.16in，tool length：4.42m |
| Max. torque for connector |
24000ft.lbs |
| Distance to the measuring point of the tool bottom |
GR~0.64m，Resistivity1.85m，Deviation6.88m |
GR tool
| Voltage input |
18─36VDC，input power：250Mw |
| Voltage output |
0─5V/2─20mApulse/DC,pulse width:10ms |
| Measuring range |
0─500API,error:≤±6% |
| Vertical resolution |
≤9in |
|
