Invention Grant
- Patent Title: Two speed direct drive drawworks
- Patent Title (中): 两速直接驱动绞车
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Application No.: US13821300Application Date: 2011-09-07
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Publication No.: US09022358B2Publication Date: 2015-05-05
- Inventor: Kevin R. Williams
- Applicant: Kevin R. Williams
- Applicant Address: US TX Houston
- Assignee: Canrig Drilling Technology Ltd.
- Current Assignee: Canrig Drilling Technology Ltd.
- Current Assignee Address: US TX Houston
- Agency: Adolph Locklar
- International Application: PCT/US2011/050622 WO 20110907
- International Announcement: WO2012/033793 WO 20120315
- Main IPC: B66D1/12
- IPC: B66D1/12 ; E21B19/00 ; H02K3/28 ; H02P3/22 ; H02P25/18 ; H02K21/14 ; G05B11/01 ; H02P3/12 ; H02P7/06 ; H02K1/32
Abstract:
A direct drive drawworks (100) has a permanent magnet motor (40) with a first set of windings (250) and a second set of windings (252), a shaft (41) extending from the permanent magnet motor (40) such that the permanent magnet motor directly rotates the shaft (41), a drum (43) connected to the shaft (41) away from the permanent magnet motor (40) such that the rotation of the shaft (41) causes a corresponding rotation of the drum (43), and a switch cooperative with the first set of windings and the second set of windings so as to cause the sets of windings to be selectively connected in parallel or in series.
Public/Granted literature
- US20130240808A1 TWO SPEED DIRECT DRIVE DRAWWORKS Public/Granted day:2013-09-19
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