Invention Grant
- Patent Title: Self-elevating mast employing draw works
- Patent Title (中): 自升式桅杆采用绘画作品
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Application No.: US14581499Application Date: 2014-12-23
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Publication No.: US09279267B2Publication Date: 2016-03-08
- Inventor: Anthony Petrello , Padira Reddy , Ashish Gupta , Sean M. Bailey
- Applicant: Nabors Drilling International Limited
- Applicant Address: BM Hamilton
- Assignee: NABORS DRILLING INTERNATIONAL LIMITED
- Current Assignee: NABORS DRILLING INTERNATIONAL LIMITED
- Current Assignee Address: BM Hamilton
- Agency: Haynes and Boone LLP
- Main IPC: E04H12/34
- IPC: E04H12/34 ; E21B15/00 ; E21B19/00 ; E04B1/343 ; E04B1/35

Abstract:
A system comprising a support structure having a plurality of vertically extending members arranged to define a mast channel, the support structure attached to a platform having a rig floor and the support structure positioned above an opening in the rig floor; a first mast section that is attached to the support structure; a second mast section that is attached to the support structure and the first mast section; and a third mast section; wherein the system has a first arrangement in which the third mast section is located below the rig floor in a vertical position and is vertically spaced from the second mast; and wherein the system has a second arrangement in which the third mast section is attached to the second mast section and at least a portion of the third mast extends within the opening of the rig floor.
Public/Granted literature
- US20150107165A1 SELF-ELEVATING MAST EMPLOYING DRAW WORKS Public/Granted day:2015-04-23
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