Main hoist system of rotary drilling rig, and control method therefor

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12091293
APP PUB NO 20230271814A1
SERIAL NO

17924693

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A main winch system of a rotary drilling rig includes a main action loop, a pilot control loop, and a feedback control loop. The main action loop includes an engine, a hydraulic pump, a main control valve, a balance valve, a main winch motor, and an oil tank. The pilot control loop includes a pilot handle, a solenoid valve I, a pressure relay, and the main control valve in the main action loop. The feedback control loop includes a solenoid valve II and the hydraulic pump and the main control valve in the main action loop. In response to a lifting action of the pilot handle for the main winch, under the control of a button, the solenoid valve II is energized continuously, and the solenoid valve I is energized and de-energized according to a given rule.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
XUZHOU XUGONG FOUNDATION CONSTRUCTION MACHINERY CO LTDNO 1 XUGONG AVENUE QINGSHANQUAN TOWN JIAWANG DISTRICT XUZHOU CITY JIANGSU PROVINCE 221004 XUZHOU CITY JIANGSU PROVINCE 221004

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gao, Xiafang Xuzhou, CN 1 0
Gao, Xing Xuzhou, CN 14 6
Geng, Qianbin Xuzhou, CN 1 0
Liu, Zhigang Xuzhou, CN 111 1521
Qiu, Hongchen Xuzhou, CN 1 0
Shan, Changmeng Xuzhou, CN 1 0
Shan, Junyun Xuzhou, CN 1 0
Sun, Yu Xuzhou, CN 426 3781
Zhang, Yonghua Xuzhou, CN 22 129

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Mar 17, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Mar 17, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Mar 17, 2036
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00