Vertical shaft drilling rig using novel drilling method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 12, 2019
Grant Date -
Dec 22, 2016
app pub date -
Dec 9, 2014
filing date -
Mar 21, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A vertical shaft drilling rig which includes a derrick and a flatcar element. The rig includes a drill pipe connecting to the derrick, a pipe joint provided on the drill pipe, a device for stabilizing cutterhead pressure connecting to the drill pipe, a torque amplification driver at which the device for stabilizing cutterhead is installed, a cutter head connected to the torque amplification driver, a separate plant on the ground surface, a muck removal system transporting the muck produced to the separate plant, an electric cabinet, a hydraulic station, a power line, and a deep shaft line extension device between the hydraulic station and the power line. The torque amplification driver includes a pressure balance valve, a planetary reducer, a drive flange and a main bearing. The deep shaft line extension device includes a float, a pulley assembly, a line reel, a steel wire and a winch.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- E21D Class
- 67 Applications Filed
- 60 Patents Issued To-Date
- 89.56 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- E21D Class
- 0 % this patent is cited more than
- 6 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 12, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 12, 2030 |
