# US 9,428,976 B2 · System and method for servicing a wellbore > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,428,976 B2 - Document ID: US9428976B2 - Status: Granted - Kind: B2 - Application number: 14/156,232 - Filed: 2014-01-15 - Published: 2014-06-12 - Granted: 2016-08-30 - Earliest claimed: 2011-02-10 - Assignees: Halliburton Energy Services, Inc. - Applicants: Halliburton Energy Services, Inc. - Inventors: Jesse Cale Porter; Kendall Lee Pacey; Matthew Todd Howell; William Ellis Standridge - Web page: https://patentgrep.com/patent/US9428976B2 ## CPC - E21B 21/103: {Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus (valves specifically for maintaining circulation of drilling fluid while connecting or disconnecting tubular joints E21B21/019)} - E21B 34/102: {with means for locking the closing element in open or closed position (E21B34/105 and E21B34/108 take precedence)} - E21B 34/142: {unsupported or free-falling elements, e.g. balls, plugs, darts or pistons} - E21B 43/12: Methods or apparatus for controlling the flow of the obtained fluid to or in wells (E21B43/25 takes precedence; valve arrangements E21B34/00) - E21B 43/14: Obtaining from a multiple-zone well - E21B 2200/06: Sleeve valves - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A wellbore servicing system, comprising a sleeve system comprising a ported case, a sliding sleeve within the case and movable between a first sleeve position in which the sleeve restricts fluid communication via the case and a second sleeve position in which the sleeve does not, a radially divided segmented seat movable between a first seat position in which the seat restricts movement of the sleeve and a second seat position in which the seat does not, and a sheath covering a portion of the seat, the sleeve system being transitionable from a first, to a second, to a third mode, in the first mode, the sleeve is in its first position and the seat in its first position, in the second mode, the sleeve is in its first position and the seat in its second position, and, in the third mode, the sleeve is in its second position. ## Claims ### Claim 1 A wellbore servicing system, comprising: a first sleeve system, the first sleeve system comprising: a first ported case; a first sliding sleeve at least partially carried within the first ported case and movable relative to the first ported case between a first sleeve position in which the first sliding sleeve restricts fluid communication via the ported case and a second sleeve position in which the first sliding sleeve does not restrict fluid communication via the ported case; a first segmented seat, the first segmented seat being radially divided into a plurality of segments and movable relative to the first ported case between a first seat position in which the first seat restricts movement of the sliding sleeve relative to the ported case and a second seat position in which the first seat does not restrict movement of the sliding sleeve relative to the ported case; a first piston at least partially received substantially concentrically between the first sliding sleeve and the first ported case; a bias chamber at least partially defined by each of the first ported case, the first sliding sleeve, and the first piston; and a first sheath forming a continuous layer that covers one or more surfaces of the first segmented seat, the first sleeve system being transitionable between a first mode and a second mode and transitionable between the second mode and a third mode, wherein, when in the first mode, the first sliding sleeve is retained in the first sleeve position and the first segmented seat is retained in the first seat position, wherein, when in the second mode, the first sliding sleeve is retained in the first sleeve position and the first segmented seat is in the second seat position, and wherein, when in the third mode, the first sliding sleeve is in the second sleeve position. ### Claim 2 (depends on 1) The wellbore servicing system of claim 1, further comprising: a second sleeve system, the second sleeve system comprising: a second ported case; a second sliding sleeve at least partially carried within the second ported case and movable relative to the second ported case between a first sleeve position in which the second sliding sleeve restricts fluid communication via the ported case and a second sleeve position in which the second sliding sleeve does not restrict fluid communication via the ported case; a second segmented seat, the second segmented seat being radially divided into a plurality of segments and movable relative to the second ported case between a first seat position in which the second seat restricts movement of the sliding sleeve relative to the ported case and a second seat position in which the second seat does not restrict movement of the sliding sleeve relative to the ported case; and a second sheath forming a continuous layer that covers one or more surfaces of the second segmented seat, the second sleeve system being transitionable between a first mode and a second mode and transitionable between the second mode and a third mode, wherein, when in the first mode, the second sliding sleeve is retained in the first sleeve position and the second segmented seat is retained in the first seat position, wherein, when in the second mode, the second sliding sleeve is retained in the first sleeve position and the second segmented seat is in the second seat position, and wherein, when in the third mode, the second sliding sleeve is in the second sleeve position. ### Claim 3 (depends on 1) The wellbore servicing system of claim 1, wherein the first segmented seat comprises at least three radially divided segments. ### Claim 4 (depends on 1) The wellbore servicing system of claim 1, wherein the first segmented seat comprises a drillable material. ### Claim 5 (depends on 1) The wellbore servicing system of claim 1, wherein the first segmented seat comprises a composite, a phenolic, cast iron, aluminum, brass, a metal alloy, a rubber, a ceramics, or combinations thereof. ### Claim 6 (depends on 1) The wellbore servicing system of claim 1, wherein the first segmented seat comprises a first radial diameter when the first segmented seat is in the first seat position and a second radial diameter when the first segmented seat is in the second seat position, the second radial diameter being greater than the first radial diameter. ### Claim 7 (depends on 1) The wellbore servicing system of claim 1, wherein the protective sheath covers those portions of the first segmented seat in contact with a flow bore of the first sleeve system. ### Claim 8 (depends on 1) The wellbore servicing system of claim 1, wherein the first protective sheath comprises a ceramic, a carbide, a hardened plastic, a molded rubber, a heat-shrinkable material, or combinations thereof. ### Claim 9 (depends on 1) The wellbore servicing system of claim 1, wherein the first protective sheath is characterized as having a hardness of from about 50 durometers to about 100 durometers. ### Claim 10 (depends on 1) The wellbore servicing system of claim 1, wherein the first protective sheath is applied to the first segmented seat, one or more segments of the first segmented seat, or combinations thereof. ### Claim 11 (depends on 1) The wellbore servicing system of claim 1, wherein the first the protective sheath is preformed and is inserted within a longitudinal flow bore of the first segmented seat. ### Claim 12 (depends on 1) The wellbore servicing system of claim 1, wherein the first protective sheath is received within a recess within the segmented seat. ### Claim 13 (depends on 1) The wellbore servicing system of claim 1, wherein a first portion of the first protective sheath is configured to receive an obturator, wherein the first portion of the first protective sheath comprises a thickness greater than the thickness of another portion of the first protective sheath. ### Claim 14 (depends on 1) The wellbore servicing system of claim 1, further comprising: a lug selectively received through the first piston and between the first segmented seat and the first ported case. ### Claim 15 (depends on 14) The wellbore servicing system of claim 14, wherein the lug is selectively received within a lug channel of the first ported case. ### Claim 16 (depends on 1) The wellbore servicing system of claim 1, further comprising: a spring received at least partially within the bias chamber. ### Claim 17 A wellbore servicing method comprising: positioning a first sleeve system within the wellbore proximate to a first treatment zone, the first sleeve system comprising: a first ported case; a first sliding sleeve at least partially carried within the first ported case and movable relative to the first ported case between a first sleeve position in which the first sliding sleeve restricts fluid communication via the ported case and a second sleeve position in which the first sliding sleeve does not restrict fluid communication via the ported case; a first segmented seat, the first segmented seat being radially divided into a plurality of segments and movable relative to the first ported case between a first seat position in which the first seat restricts movement of the sliding sleeve relative to the ported case and a second seat position in which the first seat does not restrict movement of the sliding sleeve relative to the ported case; a first piston at least partially received substantially concentrically between the first sliding sleeve and the first ported case; a bias chamber at least partially defined by each of the first ported case, the first sliding sleeve, and the first piston; and a first sheath forming a continuous layer that covers one or more surfaces of the first segmented seat, the first sleeve system being transitionable between a first mode and a second mode and transitionable between the second mode and a third mode, wherein, when in the first mode, the first sliding sleeve is retained in the first sleeve position and the first segmented seat is retained in the first seat position, wherein, when in the second mode, the first sliding sleeve is retained in the first sleeve position and the first segmented seat is in the second seat position, and wherein, when in the third mode, the first sliding sleeve is in the second sleeve position. ### Claim 18 (depends on 17) The method of claim 17, further comprising: transitioning the first sleeve system to the third mode; and communicating a wellbore servicing fluid via the ported case of the first sleeve system to the first treatment zone. ### Claim 19 (depends on 17) The wellbore servicing system of claim 17, further comprising: a lug selectively received through the first piston and between the first segmented seat and the first ported case, wherein the lug is selectively received within a lug channel of the first ported case. ### Claim 20 (depends on 17) The wellbore servicing system of claim 17, further comprising a spring received at least partially within the bias chamber.