Invention Grant
- Patent Title: Downhole formation protection valve
-
Application No.: US15924970Application Date: 2018-03-19
-
Publication No.: US11035200B2Publication Date: 2021-06-15
- Inventor: George James Melenyzer
- Applicant: George James Melenyzer
- Applicant Address: US TX Cypress
- Assignee: George James Melenyzer
- Current Assignee: George James Melenyzer
- Current Assignee Address: US TX Cypress
- Agency: Nolte Lackenbach Siegel
- Main IPC: E21B34/08
- IPC: E21B34/08 ; E21B33/128 ; E21B23/06 ; E21B34/14 ; E21B43/12

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 downhole pressure from formation fluids.
Public/Granted literature
- US20180266210A1 DOWNHOLE FORMATION PROTECTION VALVE Public/Granted day:2018-09-20
Information query