Title:
FORCE STACKING ASSEMBLY FOR USE WITH A SUBTERRANEAN EXCAVATING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/106479
Kind Code:
A8
Abstract:
A force stacking assembly for use with an earth boring system that includes a series of actuators (37) that each generate a force, and that are arranged to create a combined force that is cumulative of all of the actuators. The actuators (37) include members (38) that react in response to an applied stimulus, such as from an electrical current or magnetic field. The members (38) are arranged in series in a hollow housing (26), planar bulkheads (30) are transversely mounted in the housing (26). Each of the members (38) have an end axially abutting a corresponding bulkhead (30). Ends of each member (30) distal from its corresponding bulkhead (30) couple to a ram member (32), that in turn couples to a drill bit (44). Energizing the members (38) causes each to exert a force against the ram member (32), which is transferred to the bit (44).
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Inventors:
FRASER SCOTT (NL)
BAMFORD BEN (GB)
BAMFORD BEN (GB)
Application Number:
PCT/US2016/066899
Publication Date:
June 14, 2018
Filing Date:
December 15, 2016
Export Citation:
Assignee:
SAUDI ARABIAN OIL CO (SA)
ARAMCO SEVICES COMPANY (US)
ARAMCO SEVICES COMPANY (US)
International Classes:
E21B7/24; E21B4/06; E21B4/12; E21B28/00
Attorney, Agent or Firm:
RHEBERGEN, Constance, Gall (US)
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