Pressure monitoring apparatus

Wells – Processes – With indicating – testing – measuring or locating

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166113, E21B 4706

Patent

active

048672378

ABSTRACT:
A pressure monitoring apparatus for use in a tubing string having a landing nipple located therein above a well zone which is to be monitored includes a plug body, a mandrel sleeve, a pressure communication mandrel and a pressure sensor. The plug body is landed in the landing nipple, and has an axial body bore therethrough. The mandrel sleeve has a lower portion constructed to be sealingly received within the body bore, and has an axial sleeve bore disposed therethrough. The pressure communication mandrel has a lower portion constructed to be sealingly received within the sleeve bore, and has a pressure communication passage disposed therethrough for communicating the pressure sensor with the well zone. The pressure monitoring apparatus can be adapted for use in methods of monitoring pressure fall-off in a subsurface formation after injection of fluid into the formation, and also can be adapted for use in methods of monitoring a bottom hole shut-in pressure buildup in a production well.

REFERENCES:
patent: 3198257 (1965-08-01), Myers
patent: 3204697 (1965-09-01), Gaut
patent: 3812911 (1974-05-01), Vann
patent: 4044827 (1977-08-01), Kerzee et al.
patent: 4051897 (1977-10-01), Kingelin
patent: 4134452 (1979-01-01), Kingelin
patent: 4159643 (1979-07-01), Watkins
patent: 4252195 (1981-02-01), Fredd
patent: 4669537 (1987-06-01), Rumbaugh
Baker Packers Model FWG Bypass Blanking Plug, p. 893, vol. 1, 1982-1983, Composite Catalog of Oilfield Equipment and Services.
Baker Packers Model F Seating Nipple, p. 888, vol. 1, 1982-1983, Composite Catalog of Oilfield Equipment and Services.

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