Title:
SCREEN ASSEMBLY AND A METHOD FOR MAKING SAME
Document Type and Number:
WIPO Patent Application WO/2012/101418
Kind Code:
A3
Abstract:
A screen assembly for a shale shaker, the screen assembly comprising a support structure (602) and at least one layer of screening material (601) thereon, wherein the support structure (602) comprises structural members (605,606) having a thermal expansion coefficient and the at least one layer of screening material (601) has a thermal expansion coefficient characterised in that the thermal expansion coefficient of the structural members (605,606) is substantially equal to the thermal expansion coefficient of the at least one layer of screening material (601).The invention also provides a method for making a support structure for a screen assembly, the method comprising the steps of placing at least one support member (605,606) in a mould whereupon a flowable plastics material is injected into the mould, whereupon the flowable plastics material hardens, at least a portion of the flowable plastics material forming a brace (617).
Inventors:
BURNETT GEORGE ALEXANDER (GB)
Application Number:
PCT/GB2012/050044
Publication Date:
December 05, 2013
Filing Date:
January 10, 2012
Export Citation:
Assignee:
NAT OILWELL VARCO LP (US)
BURNETT GEORGE ALEXANDER (GB)
BURNETT GEORGE ALEXANDER (GB)
International Classes:
B07B1/28; E21B21/06
Domestic Patent References:
| WO2009102597A2 | 2009-08-20 |
Foreign References:
| US6305549B1 | 2001-10-23 | |||
| EP0356209A2 | 1990-02-28 | |||
| US20070108107A1 | 2007-05-17 | |||
| EP1205265A2 | 2002-05-15 |
Attorney, Agent or Firm:
LUCAS, Phillip, Brian (135 Westhall RoadWarlingham, Surrey CR6 9HJ, GB)
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