Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LOAD-MEASURING HYDRAULIC CYLINDER
Document Type and Number:
WIPO Patent Application WO/2018/080958
Kind Code:
A3
Abstract:
A hinged structure includes a hinge that is actuatable using a hydraulic cylinder. A method of monitoring a load applied to the hinged structure involves leaking the hydraulic fluid from the hydraulic cylinder in a way that compensates for expansion of the hydraulic fluid caused by variations in temperature of the hydraulic fluid. The method further involves measuring the pressure of the hydraulic fluid in the hydraulic cylinder. The hydraulic cylinder may be part of a coiled tubing injector. The load applied to the hydraulic cylinder may be used to indicate an overload of the tubing guide.

Inventors:
STEFFENHAGEN, Timothy S. (712 Timberview Court N, Fort Worth, Texas, 76112, US)
WHITE, William Benjamin (3125 Woodbridge Drive, Bedford, Texas, 76021, US)
Application Number:
US2017/057799
Publication Date:
May 31, 2019
Filing Date:
October 23, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NATIONAL OILWELL VARCO, L.P. (7909 Parkwood Circle Drive, Houston, Texas, 77036, US)
International Classes:
F15B1/02; F15B13/08
Domestic Patent References:
WO2015177228A12015-11-26
Foreign References:
US20130001492A12013-01-03
EP2529821A12012-12-05
US4865147A1989-09-12
US2927605A1960-03-08
US20150252554A12015-09-10
US20120180470A12012-07-19
Attorney, Agent or Firm:
FORINASH, Derek V. (Porter Hedges LLP, 1000 Main St. 36th Floo, Houston Texas, 77002, US)
Download PDF: