Title:
DOWNHOLE FORMATION PROTECTION VALVE
Document Type and Number:
WIPO Patent Application WO/2018/175372
Kind Code:
A3
Abstract:
In a first aspect, a bidirectional formation protection valve includes: a tubular body having an inner diameter defining a fluid flow path therethrough and being adapted to be sealably disposed within a wellbore; an uphole valve disposed within the inner diameter of the tubular body to control fluid flow therethrough, the uphole valve being biased to close the fluid flow path against a first pressure and adapted to be opened upon receiving a stinger in the inner diameter; and a downhole valve disposed within the inner diameter of the tubular body to control fluid flow therethrough, the downhole valve being biased to close the fluid flow path against a second pressure and adapted to be opened upon receiving a stinger in the inner diameter. The first and second pressures are an uphole pressure from kill fluids and a dovynhoie pressure from formation fluids.
Inventors:
MELENYZER GEORGE (US)
Application Number:
PCT/US2018/023247
Publication Date:
January 31, 2019
Filing Date:
March 20, 2018
Export Citation:
Assignee:
FRONTIER OIL TOOLS (US)
MELENYZER GEORGE JAMES (US)
MELENYZER GEORGE JAMES (US)
International Classes:
E21B34/06; E21B33/12
Foreign References:
| US20130075109A1 | 2013-03-28 | |||
| US20030070814A1 | 2003-04-17 | |||
| EP1361334A1 | 2003-11-12 | |||
| US20130255947A1 | 2013-10-03 | |||
| US20020174988A1 | 2002-11-28 |
Attorney, Agent or Firm:
NOLTE, N., Alexander et al. (US)
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