US3633670A — Tool string assembly for use in wells

Claim 1

Independent Claim 241 words

A tool string assembly to be run in a well bore, comprising: a. an anchor subassembly for anchoring the tool string to the well bore and including a tubular body; b. a packer subassembly mounted to the lower end of the anchor subassembly for sealing engagement with the well wall; i. said subassemblies having coaxial communicating bores defining a central passage therethrough; c. a bridging plug mounted to the lower end of said packer subassembly and having an axial bore communicating with said central passage; d. a setting tool subassembly including: i. a running collar connectable to a running string and extending concentrically over the upper end portion of said tubular body; ii. latch means connecting the collar to said upper end portion of said body and releasable therefrom in response to nonrotative relative upward movement of the collar; and iii. a tubular mandrel connected to the running collar to extend through said central passage into the bore of the bridging plug; e. valve means in the bridging plug arranged for movement between positions opening and closing fluid communication between the well bore and said central passage; and f. means carried by the mandrel cooperating with said valve means to hold the latter in open position when said collar is secured by said latch means to said anchor subassembly and to effect movement of said valve means to the closed position in response to said relative upward movement of said collar.

Claim 2

Dependent Claim 241 words

A tool string assembly to be run in a well bore, comprising: a. an anchor subassembly for anchoring the tool string to the well bore and including a tubular body; b. a packer subassembly mounted to the lower end of the anchor subassembly for sealing engagement with the well wall; i. said subassemblies having coaxial communicating bores defining a central passage therethrough; c. a bridging plug mounted to the lower end of said packer subassembly and having an axial bore communicating with said central passage; d. a setting tool subassembly including: i. a running collar connectable to a running string and extending concentrically over the upper end portion of said tubular body; ii. latch means connecting the collar to said upper end portion of said body and releasable therefrom in response to nonrotative relative upward movement of the collar; and iii. a tubular mandrel connected to the running collar to extend through said central passage into the bore of the bridging plug; e. valve means in the bridging plug arranged for movement between positions opening and closing fluid communication between the well bore and said central passage; and f. means carried by the mandrel cooperating with said valve means to hold the latter in open position when said collar is secured by said latch means to said anchor subassembly and to effect movement of said valve means to the closed position in response to said relative upward movement of said collar.

Claim 3

Dependent Claim 50 words

A tool according to claim 1 wheRein said valve means, comprises: a. ports through the wall of said bridging plug; and b. a sleeve valve slidably disposed in the bore of said plug for axial movement between an upper position closing said ports and a lower position opening said ports.

Claim 4

Dependent Claim 118 words

A tool string according to claim 1 wherein said bridging plug and said valve means, comprises: a. a tubular casing leaving a plurality of radial ports communicating with the bore thereof; b. a sleeve valve slidable between an upper position closing said ports and a lower position opening said ports; c. a plurality of radially movable anchor dogs mounted in the wall of said sleeve valve; d. an annular recess in the wall of said casing registrable with said dogs when the sleeve valve is in said upper position; and e. cooperating latch means arranged between said sleeve valve and said casing to lock the sleeve valve to said casing when the sleeve valve attains said upper position.

Claim 5

Dependent Claim 61 words

A tool string according to claim 3 wherein said latch means, comprises: a. a split latch ring mounted about the exterior of said sleeve valve below said anchor dogs; and b. an annular latch groove in the wall of said casing below said annular recess positioned to receive said latch ring when said anchor dogs are in registration with said recess.

Claim 6

Dependent Claim 72 words

A tool string assembly according to claim 3, wherein said means carried by the mandrel cooperating with said valve means comprises: a. shoulder means abuttable with the upper end of said sleeve valve to move the latter downwardly; and b. an annular recess in the exterior of the mandrel positioned to register with said anchor dogs when said shoulder means is in abutting engagement with said upper end of said sleeve valve.

Claim 7

Dependent Claim 182 words

A tool string assembly to be run in a well bore, comprising: a. a well packer having an axial through bore; b. anchor means for releasably anchoring the packer to the well wall; c. a bridging plug mounted to the lower end of the packer; d. valve means in the bridging plug arranged for opening and closing fluid communication between the well bore and said through bore; and e. a releasable anchor setting tool connectable to a running string comprising: i. a tubular mandrel extendible through said through bore; ii. means carried by the mandrel releasably connected to the anchor means and operable in one position to hold said anchor means out of anchoring engagement with the well wall and in a second position to cause said anchor means to engage the well wall; and iii. means carried by said mandrel cooperating with said valve means to hold the latter in the open position when the mandrel is in said one position and to release the valve means for movement to the closed position when the mandrel is in said second position.

Claim 8

Dependent Claim 182 words

A tool string assembly to be run in a well bore, comprising: a. a well packer having an axial through bore; b. anchor means for releasably anchoring the packer to the well wall; c. a bridging plug mounted to the lower end of the packer; d. valve means in the bridging plug arranged for opening and closing fluid communication between the well bore and said through bore; and e. a releasable anchor setting tool connectable to a running string comprising: i. a tubular mandrel extendible through said through bore; ii. means carried by the mandrel releasably connected to the anchor means and operable in one position to hold said anchor means out of anchoring engagement with the well wall and in a second position to cause said anchor means to engage the well wall; and iii. means carried by said mandrel cooperating with said valve means to hold the latter in the open position when the mandrel is in said one position and to release the valve means for movement to the closed position when the mandrel is in said second position.

Claim 9

Dependent Claim 162 words

A bridging plug for use in a well tool string, comprising: a. a tubular casing connectable to a well tool string and having an axial bore closed at its lower end; b. ports through the wall of said casing above said lower end; c. sleeve valve means slidable in the bore of the casing between an upper position closing said ports and a lower position opening said ports; d. an annular anchor recess in the wall of said casing below said ports/ e. a plurality of angularly spaced anchor elements mounted in the wall of said valve means for radial movement into and out of anchoring engagement with said recess in accordance with said positions of the sleeve valve means; f. cooperating lock means carried by the casing and said sleeve valve means arranged to lock the sleeve valve means to the casing in said upper position; and g. means extendible into said bore for moving said valve means between said positions.

Claim 10

Dependent Claim 162 words

A bridging plug for use in a well tool string, comprising: a. a tubular casing connectable to a well tool string and having an axial bore closed at its lower end; b. ports through the wall of said casing above said lower end; c. sleeve valve means slidable in the bore of the casing between an upper position closing said ports and a lower position opening said ports; d. an annular anchor recess in the wall of said casing below said ports/ e. a plurality of angularly spaced anchor elements mounted in the wall of said valve means for radial movement into and out of anchoring engagement with said recess in accordance with said positions of the sleeve valve means; f. cooperating lock means carried by the casing and said sleeve valve means arranged to lock the sleeve valve means to the casing in said upper position; and g. means extendible into said bore for moving said valve means between said positions.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-01-10	1975-07-12	1976-01-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-01-10	1979-07-12	1980-01-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-01-10	1983-07-12	1984-01-11	$7700.00	Window Closed / Lapsed

Tool string assembly for use in wells

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