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US Patent 6176311 - Downhole cutting separator
US Patent Issued on January 23, 2001
Estimated Patent Expiration Date:
October 27, 2018Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
October 27, 2018Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA downhole cutting separator is disclosed. The separator can be mounted anywhere on the drillstring. The separator employs a seal which directs the normally circulating fluid during the cutting or milling operation in through an internal passage in the tool. The cutting-laden fluid passes through a slotted liner where the cuttings drop out and are collected in a compartment within the tool. The circulating fluid exits the tool into the annulus. The tools can be used in series so that the lowermost tool takes out the large cuttings, while an upper tool takes out finer cuttings. Provisions can be made to bypass the tool should it become plugged with cuttings by using rupture discs or movable sleeves responsive to pressure differential. A portion of the body assembly can be magnetic to further assist in removal of cuttings as the circulating flow passes through the tool.Other References
| InventorAssigneeApplicationNo. 179488 filed on 10/27/1998US Classes:166/99, WITH JUNK RETRIEVING MEANS175/215With tool shaft having plural passages for drilling fluidField of Search166/99, WITH JUNK RETRIEVING MEANS166/105.3, Sediment trap formed in pumping chamber166/105.5, Having liquid-gas separator166/107, Receptacles166/167, Bottom receiving and side discharge valves175/215, With tool shaft having plural passages for drilling fluid175/308, WITH RECEPTACLE175/312Sieve or strainerExaminersPrimary: Tsay, FrankAttorney, Agent or FirmUS Patent References1741497, 2332267, 2550080, 2675879, 2710741, 2894725, 2908332, 3102600, 3648788, 4059155, Junk basket and method of removing foreign material from a wellIssued on: 11/22/1977 Inventor: Greer4276931, Junk basket Issued on: 07/07/1981 Inventor: Murray4296822, Multipurpose fluid flow assisted downhole tool Issued on: 10/27/1981 Inventor: Ormsby5035291, Seafloor drilling apparatus Issued on: 07/30/1991 Inventor: Shields5176208, Reverse circulation tool handling cuttings and debris Issued on: 01/05/1993 Inventor: Lalande, et al.5402850, Methods of using reverse circulating tool in a well borehole Issued on: 04/04/1995 Inventor: Lalande, et al.5682950Means for collecting unwanted material in an oil or gas well Issued on: 11/04/1997 Inventor: Bjørnstad International ClassE21B 031/08 |
