Tool to take multiple formation fluid pressures

Claim 2

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said chamber means comprising a plurality of separate compartments and said motive means moving said compartments for successive cooperation with separate samples of formation fluid.

Claim 3

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said chamber means comprising a plurality of separate compartments and said motive means moving said compartments for successive cooperation with separate samples of formation fluid.

Claim 4

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said Well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formation is obtainable in a single traverse of said well bore by said apparatus, said chamber means comprising a pair of separate compartments, said annular sealing means sealing off separate areas of said wall, and said motive means moving said compartments for alternating cooperation with separate sealed-off areas of said wall to collect successive samples of formation fluid, further comprising a dump chamber within said housing, the chamber not in communication with a sealed-off area of said wall communicating with said dump chamber to dump thereinto a previously collected formation fluid sample.

Claim 5

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said Well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formation is obtainable in a single traverse of said well bore by said apparatus, said chamber means comprising a pair of separate compartments, said annular sealing means sealing off separate areas of said wall, and said motive means moving said compartments for alternating cooperation with separate sealed-off areas of said wall to collect successive samples of formation fluid, further comprising a dump chamber within said housing, the chamber not in communication with a sealed-off area of said wall communicating with said dump chamber to dump thereinto a previously collected formation fluid sample.

Claim 6

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said chamber means comprising a plurality of separate compartments and said motive means comprising a piston-cylinder assembly urged by pressure of fluid in said well bore to move said compartments for successive cooperation with separate samples of formation fluid, further comprising escapement means for releasably restraining movement of said compartments and solenoid means operatively connected to said escapement means, whereby said compartments can execute a limited movement and successive ones of said compartments are arrested in cooperative relation with said gauge means.

Claim 7

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said chamber means comprising a plurality of separate compartments and said motive means comprising a piston-cylinder assembly urged by pressure of fluid in said well bore to move said compartments for successive cooperation with separate samples of formation fluid, further comprising escapement means for releasably restraining movement of said compartments and solenoid means operatively connected to said escapement means, whereby said compartments can execute a limited movement and successive ones of said compartments are arrested in cooperative relation with said gauge means.

Claim 8

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said readings being obtained successively and said motive means comprising a reversible pump, further comprising a cylinder to and from which said pump alternately discharges and withdraws fluid, a piston mounted within said cylinder and movable in response to discharge and withdrawal of said fluid by said pump, a ram extension integral with said piston and movable therewith, a second cylinder integral with said ram extension and movable therewith, a second piston mounted within said second cylinder for limited movement therewith, said chamber means being defined at least in part by said second cylinder and said second piston, and means for arresting movement of said second piston after the sealing off of said area notwithstanding continued movement of said second cylinder, whereby said chamber means is expanded to reduce the pressure therein and facilitate the collection of formation fluid therein.

Claim 9

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said readings being obtained successively and said motive means comprising a reversible pump, further comprising a cylinder to and from which said pump alternately discharges and withdraws fluid, a piston mounted within said cylinder and movable in response to discharge and withdrawal of said fluid by said pump, a ram extension integral with said piston and movable therewith, a second cylinder integral with said ram extension and movable therewith, a second piston mounted within said second cylinder for limited movement therewith, said chamber means being defined at least in part by said second cylinder and said second piston, and means for arresting movement of said second piston after the sealing off of said area notwithstanding continued movement of said second cylinder, whereby said chamber means is expanded to reduce the pressure therein and facilitate the collection of formation fluid therein.

Claim 10

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said readings being obtained successively and said motive means comprising a reversible pump, further comprising a cylinder to and from which said pump alternately discharges and withdraws fluid, a piston mounted within said cylinder and movable in response to discharge and withdrawal of said fluid by said pump, a ram extension integral with said piston and movable therewith, a second piston integral with said ram extension and movable therewith, a second cylinder enclosing said second piston, said chamber means being defined at least in part by said second cylinder and said second piston, whereby said chamber means is expansible to reduce the pressure therein and facilitate the collection of formation fluid therein.

Claim 11

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said readings being obtained successively and said motive means comprising a reversible pump, further comprising a cylinder to and from which said pump alternately discharges and withdraws fluid, a piston mounted within said cylinder and movable in response to discharge and withdrawal of said fluid by said pump, a ram extension integral with said piston and movable therewith, a second piston integral with said ram extension and movable therewith, a second cylinder enclosing said second piston, said chamber means being defined at least in part by said second cylinder and said second piston, whereby said chamber means is expansible to reduce the pressure therein and facilitate the collection of formation fluid therein.

Claim 12

Apparatus according to claim 1 further comprising positioning means mounted on said housing for pressing against the wall of said well bore and thereby urging said sealing means against said wall to facilitate said sealing off.

Claim 13

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, further comprising a reversible electric motor, a pinion gear driven by said motor, a movable rack driven by said pinion gear, positioning means engageable with said wall, and lever means connecting said rack and positioning means, whereby said motor when run in one direction forces said positioning means against said wall and when run in the opposite direction withdraws said positioning means from said wall.

Claim 14

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formation fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, further comprising a reversible electric motor, a pinion gear driven by said motor, a movable rack driven by said pinion gear, positioning means engageable with said wall, and lever means connecting said rack and positioning means, whereby said motor when run in one direction forces said positioning means against said wall and when run in the opposite direction withdraws said positioning means from said wall.

Claim 15

Apparatus according to claim 1 in which said gauge means reads pressure.

Claim 16

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formatIon fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said readings being obtained successively and said motive means comprising an electric motor, a pinion gear driven by said motor, a movable rack driven by said pinion gear, a piston integral and movable with said rack, and a cylinder enclosing said piston, said chamber means being defined at least in part by said piston and cylinder.

Claim 17

Apparatus for obtaining a plurality of readings with respect to fluids in formations traversed by a well bore, comprising a housing, annular sealing means mounted on said housing for sealing off an area of the wall of said well bore from fluid within said well bore, formation-fluid-sample-receiving chamber means within said housing in communication with said sealed-off area of said wall, gauge means operatively connected to said chamber means for obtaining a reading with respect to formation fluid within said chamber means, and motive means for bringing said chamber means into cooperation with discrete samples of formatIon fluid collected at spaced-apart locations in said well bore, whereby a plurality of readings with respect to fluid in said formations is obtainable in a single traverse of said well bore by said apparatus, said readings being obtained successively and said motive means comprising an electric motor, a pinion gear driven by said motor, a movable rack driven by said pinion gear, a piston integral and movable with said rack, and a cylinder enclosing said piston, said chamber means being defined at least in part by said piston and cylinder.