# US 2013/0276554 A1 · Multi-Fluid Injector Core Holder > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0276554 A1 - Document ID: US20130276554A1 - Status: Published application - Kind: A1 - Application number: 13/454,402 - Filed: 2012-04-24 - Published: 2013-10-24 - Earliest claimed: 2012-04-24 - Assignees: Halliburton Energy Services, Inc. - Inventors: Kenneth Heidt MATTHEWS; Christopher Ray BELL - Web page: https://patentgrep.com/patent/US20130276554A1 ## CPC - E21B 25/005: {Above ground means for handling the core, e.g. for extracting the core from the core barrel} - E21B 49/00: Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells - G01N 15/0806: {Details, e.g. sample holders, mounting samples for testing} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract A core holder comprises a plurality of fluid flow lines, a housing, a core sleeve disposed within the housing, an end cap coupled to a first end of the core sleeve and a first end of the housing, and an injector assembly disposed within the housing and coupled to a second end of the core sleeve. The injector assembly comprises a plurality of fluid passages coupled to the plurality of fluid flow lines, and a chamber in fluid communication with the plurality of fluid passages and an interior of the sleeve. ## Claims ### Claim 1 A core holder comprising: a plurality of fluid flow lines; a housing; a core sleeve disposed within the housing; an end cap coupled to a first end of the core sleeve and a first end of the housing; and an injector assembly disposed within the housing and coupled to a second end of the core sleeve, wherein the injector assembly comprises: a plurality of fluid passages coupled to the plurality of fluid flow lines; and a chamber in fluid communication with the plurality of fluid passages and an interior of the sleeve. ### Claim 2 (depends on 1) The core holder of claim 1, further comprising an annular region defined between an inner surface of the housing and an outer surface of the core sleeve, wherein the annular region is configured to accept a pressurized fluid. ### Claim 3 (depends on 1) The core holder of claim 1, wherein the injector assembly further comprises a receiver comprising the plurality of fluid passages and a body portion, wherein the chamber is defined by a surface of the receiver and a surface of the body portion. ### Claim 4 (depends on 1) The core holder of claim 1, wherein the injector assembly further comprises a distributor disposed on an end of the injector assembly within the core sleeve. ### Claim 5 (depends on 1) The core holder of claim 1, further comprising a second end cap coupled to a second end of the housing. ### Claim 6 (depends on 5) The core holder of claim 5, wherein a ratio of a first distance between an outer surface of the second end cap and the chamber and a second distance between the chamber and an adjacent surface of a core sample disposed within the core sleeve is in the range of about 1:20 to about 20:1. ### Claim 7 (depends on 1) The core holder of claim 1, wherein the chamber comprises one or more mixing features. ### Claim 8 (depends on 7) The core holder of claim 7, wherein the one or more mixing features comprise one or more surface features disposed on an inner surface of the chamber, one or more fins disposed within the chamber, a mesh fill within the chamber, a gauze fill within the chamber, one or more mixing members disposed within the chamber, or any combination thereof. ### Claim 9 (depends on 1) The core holder of claim 1, further comprising a check valve disposed in one or more of the plurality of flow passages. ### Claim 10 (depends on 9) The core holder of claim 9, wherein the one or more of the plurality of flow passages comprise a seat, and wherein the check-valve comprises a ball disposed within the one or more of the plurality of flow passages. ### Claim 11 (depends on 1) The core holder of claim 1, wherein the core holder comprises a single axis core holder, a biaxial core holder, or a triaxial core holder. ### Claim 12 A core holder comprising: a housing; and an injector assembly disposed within the housing and coupled to a core sleeve disposed within the housing, wherein the injector assembly is configured to: receive a plurality of fluids through a plurality of fluid flow lines; contact the plurality of fluids to form a combined fluid; and provide a fluid pathway for the combined fluid to the interior of the core sleeve. ### Claim 13 (depends on 12) The core holder of claim 12, where the injector assembly comprises a chamber in which the plurality of fluids contact to form the combined fluid. ### Claim 14 (depends on 12) The core holder of claim 12, wherein the injector assembly is further configured to generate a turbulent flow upon contacting the plurality of fluids to improve the mixing and form the combined fluid. ### Claim 15 (depends on 12) The core holder of claim 12, further comprising one or more flow valves coupled to one or more of the plurality of fluid flow lines, wherein the flow valves are configured to impede flow through the one or more of the plurality of fluid flow lines in a first direction and allow flow through the one or more of the plurality of fluid flow lines in a second direction. ### Claim 16 (depends on 12) The core holder of claim 12, wherein the injector assembly is further configured to provide the combined fluid to a core sample disposed within the core sleeve within a controlled time of the plurality of fluids being contacted to form the combined fluid. ### Claim 17 A method of testing a core sample comprising: receiving a plurality of fluids within a core holder; combining the plurality of fluids within the core holder to form a combined fluid; contacting the combined fluid with a core sample within the core holder; and determining one or more properties of the core sample. ### Claim 18 (depends on 17) The method of claim 17, wherein the one or more properties of the core sample comprise a permeability, a regained permeability, a porosity, a fluid flow through the core sample, a fluid saturation in the core sample, a gas saturation in the core sample, or any combination thereof. ### Claim 19 (depends on 17) The method of claim 17, wherein the plurality of fluids react to form a reaction product in the combined fluid. ### Claim 20 (depends on 17) The method of claim 17, further comprising selecting a fluid for use in a subterranean formation based on the one or more properties of the core sample.