公开(公告)号：US20250011643A1

公开(公告)日：2025-01-09

申请号：US18894697

申请日：2024-09-24

Applicant: DORF KETAL CHEMICALS FZE

Inventor： Tom McLoughlin ,  Steven Scott Mann ,  Clay Purdy ,  Markus Weissenberger

IPC: C09K8/74 ,  C09K8/03 ,  C09K8/06 ,  C09K8/42 ,  C09K8/46 ,  C09K8/54 ,  C09K8/60 ,  C23F11/04 ,  E21B21/00 ,  E21B33/12 ,  E21B41/02 ,  E21B43/116 ,  E21B43/119 ,  E21B43/26 ,  E21B43/27 ,  E21B43/28

Abstract: A method of the invention prepares a hydrocarbon-bearing formation for stimulation. A bottom hole assembly comprising a plug and a perforation tool connected to a wireline is lowered into a wellbore having a casing. An acidic composition is injected into the wellbore; wherein a spacer separates the acidic composition from said bottom hole assembly, but the acidic composition is in direct contact with both the wireline and casing. The spacer may be existing water in the wellbore or water injected into the wellbore. The plug is positioned downhole beyond a location where a first perforation area is to be made in the casing. The perforation tool is activated creating the first perforation area. The acid then contacts the first perforation area and cementitious debris generated from the casing being perforated. The perforation tool is next moved up-hole to a second location and the casing is again perforated to create a second perforation area. The acid also contacts the second perforated area and cementitious debris generated from the perforated casing. The perforation tool is lastly removed from the wellbore.

公开(公告)号：US12180423B2

公开(公告)日：2024-12-31

申请号：US17934293

申请日：2022-09-22

Applicant: Fluid Energy Group Ltd.

Inventor： Clay Purdy ,  Markus Weissenberger

IPC: C09K8/74 ,  C09K8/03 ,  C09K8/06 ,  C09K8/42 ,  C09K8/46 ,  C09K8/54 ,  C09K8/60 ,  C23F11/04 ,  E21B21/00 ,  E21B41/02 ,  E21B43/119 ,  E21B43/26 ,  E21B43/27 ,  E21B43/28 ,  E21B33/12 ,  E21B43/116

Abstract: A method for the fracking or stimulation of a hydrocarbon-bearing formation, said method comprising the steps of: providing a wellbore in need of stimulation; inserting a plug in the wellbore at a predetermined location; inserting a perforating tool and a spearhead or breakdown acid into the wellbore; positioning the tool at said predetermined location; perforating the wellbore with the tool thereby creating a perforated area; allowing the spearhead acid to come into contact with the perforated area for a predetermined period of time sufficient to prepare the formation for fracking or stimulation; removing the tool from the wellbore; and initiating the fracking of the perforated area using a fracking fluid. Also disclosed is a corrosion inhibiting composition for use with the acid composition.

公开(公告)号：US20240117467A1

公开(公告)日：2024-04-11

申请号：US18134161

申请日：2023-04-13

Applicant: UNIVERSITY OF SOUTH CHINA

Inventor： Chunguang LI ,  Longcheng LIU ,  Chong ZHANG ,  Kaixuan TAN ,  Zhenzhong LIU ,  Yongmei LI ,  Shuo MENG ,  Wenji WANG ,  Qi LIU ,  Qianjin NIU

IPC: C22B60/02 ,  C22B3/02 ,  C22B3/04 ,  E21B43/28 ,  E21B47/00

CPC classification number: C22B60/0221 ,  C22B3/02 ,  C22B3/045 ,  E21B43/28 ,  E21B47/00 ,  E21B43/08

Abstract: Provided are an electrokinetic device and method for in-situ leaching of uranium, belonging to the technical field of in-situ leaching of uranium. The electrokinetic device for in-situ leaching of uranium includes an injection well, a pumping well, a positive electrode, a negative electrode, leaching solution, and a direct current power supply. Uranium ore is provided between the injection well and the pumping well, the negative electrode is arranged in the injection well, and the positive electrode is arranged in the pumping well. The leaching solution is injected from the injection well, flows through the uranium ore, and then is pumped from the pumping well for uranium extraction. The direct current power supply is respectively connected to the positive electrode and the negative electrode, and is configured to apply direct current between the positive electrode and the negative electrode to promote the pooling of uranium-carrying ions towards the pumping well.

公开(公告)号：US20240116789A1

公开(公告)日：2024-04-11

申请号：US18481977

申请日：2023-10-05

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Jonathan KIESEWETTER ,  Ramesh SHARMA ,  Paul CARMAN

IPC: C02F1/72 ,  C02F1/56 ,  C02F1/66 ,  C02F1/68 ,  C09K8/528 ,  E21B43/28 ,  E21B43/34

CPC classification number: C02F1/722 ,  C02F1/56 ,  C02F1/66 ,  C02F1/683 ,  C02F1/72 ,  C09K8/528 ,  E21B43/283 ,  E21B43/35 ,  C02F2103/365 ,  C02F2305/023

Abstract: Method of decomposing high molecular weight polymer downhole to prevent chelation of iron by residual high molecular weight polymer thereby producing flowback without iron contamination as chelated iron. A secondary method is also described to treat iron chelated produced water with oxidants at surface conditions, utilizing aluminum electrolytes, specifically low basicity polyaluminum chloride, to either co-precipitate residual polymer and bound iron, or to substitute chelated iron with aluminum in the polymer-metal complex, resulting in liberating of iron to enable neutral pH oxidation and removal by precipitation, coagulation, flocculation and physical separation. The produced water with removed iron can be then stored or re-used for other oilfield applications.

公开(公告)号：US11795379B2

公开(公告)日：2023-10-24

申请号：US17054356

申请日：2019-05-10

Applicant: Fluid Energy Group Ltd.

Inventor： Clay Purdy ,  Markus Weissenberger

IPC: E21B43/27 ,  C09K8/74 ,  C09K8/06 ,  C09K8/54 ,  E21B21/00 ,  E21B41/02 ,  E21B43/26 ,  E21B43/119 ,  E21B43/28 ,  C09K8/42 ,  C09K8/46 ,  C23F11/04 ,  C09K8/03 ,  C09K8/60 ,  E21B43/116 ,  E21B33/12

CPC classification number: C09K8/74 ,  C09K8/032 ,  C09K8/06 ,  C09K8/426 ,  C09K8/46 ,  C09K8/54 ,  C09K8/602 ,  C23F11/04 ,  E21B21/00 ,  E21B41/02 ,  E21B43/119 ,  E21B43/26 ,  E21B43/27 ,  E21B43/283 ,  C09K2208/32 ,  E21B33/12 ,  E21B43/116

Abstract: A novel method for the placement of spearhead acid and stimulation of a hydrocarbon-bearing formation, said method comprising the steps of:



providing a wellbore in need of multiple stages of stimulation;
inserting an isolation plug in the wellbore at a predetermined location;
inserting a perforating tool and a spearhead or breakdown acid into the wellbore simultaneously exposing the wireline and tool to the acid;
positioning the tool at said predetermined location;
perforating the wellbore with the tool thereby creating a perforated area;
allowing the spearhead acid to come into contact with the perforated area for a predetermined period of time sufficient to prepare the formation for stimulation;
removing the tool form the wellbore; and
initiating the stimulation of the perforated area using a stimulation fluid.

公开(公告)号：US11746639B2

公开(公告)日：2023-09-05

申请号：US17399806

申请日：2021-08-11

Applicant: Sesqui Mining, LLC.

Inventor： Roger L. Day ,  James A. Herickhoff

IPC: E21B43/00 ,  E21B43/28 ,  E21B43/34 ,  C22B3/20 ,  C22B26/10

CPC classification number: E21B43/28 ,  C22B3/20 ,  C22B26/10 ,  E21B43/34

Abstract: The invention discloses a method of solution mining trona by injecting an aqueous solvent into an underground cavity comprising trona to dissolve trona in the aqueous solution and removing the aqueous solution from the cavity at about the WTN triple point (the temperature at which solid phase wegscheiderite, trona, and nahcolite can co-exist in an aqueous solution). Alkaline values from the removed aqueous solution are recovered to produce a barren liquor. The method further includes either (i) treating the barren liquor to produce an aqueous solvent or (ii) treating injected aqueous solvent to reduce clogging at the trona dissolution surface caused by supersaturation of sodium bicarbonate, and precipitation of nahcolite and wegscheiderite as the aqueous solution in the cavity approaches saturation of both dissolved sodium bicarbonate and sodium carbonate.

公开(公告)号：US11591511B2

公开(公告)日：2023-02-28

申请号：US17054439

申请日：2019-05-10

Applicant: Fluid Energy Group Ltd.

Inventor： Clay Purdy ,  Markus Weissenberger

IPC: E21B43/26 ,  C09K8/74 ,  C09K8/06 ,  C09K8/54 ,  E21B21/00 ,  E21B41/02 ,  E21B43/119 ,  E21B43/28 ,  E21B43/27 ,  C09K8/42 ,  C09K8/46 ,  C23F11/04 ,  C09K8/03 ,  C09K8/60 ,  E21B43/116 ,  E21B33/12

Abstract: The invention includes methods for stimulating a hydrocarbon-bearing formation by perforating a wellbore and introducing an acidic composition in the wellbore. A preferred embodiment includes inserting an isolation plug in the wellbore at a predetermined location followed by inserting a perforating tool and a breakdown acid into the wellbore. The wellbore is perforated by the tool to create a perforated area. The breakdown acid is allowed to come into contact with the perforated area for a predetermined period of time sufficient to prepare the formation for stimulation. The tool is then removed from the wellbore wherein stimulation of the perforated area is thereby initiated. Also disclosed is a corrosion inhibiting composition for use with the acidic composition.

公开(公告)号：US20220363981A1

公开(公告)日：2022-11-17

申请号：US17824619

申请日：2022-05-25

Applicant: Fluid Energy Group Ltd.

Inventor： Clay Purdy ,  Markus Weissenberger

IPC: C09K8/74 ,  C09K8/06 ,  C09K8/54 ,  E21B21/00 ,  E21B41/02 ,  E21B43/26 ,  E21B43/119 ,  E21B43/28 ,  E21B43/27 ,  C09K8/42 ,  C09K8/46 ,  C23F11/04 ,  C09K8/03 ,  C09K8/60

Abstract: A process for the fracking or stimulation of a hydrocarbon-bearing formation, said process comprising the steps of: providing a wellbore in need of stimulation; inserting a plug in the wellbore at a location slightly beyond a predetermined location; inserting a perforating tool and a spearhead or breakdown acid into the wellbore; positioning the tool at said predetermined location; perforating the wellbore with the tool thereby creating a perforated area; allowing the spearhead acid to come into contact with the perforated area for a predetermined period of time sufficient to prepare the formation for fracking or stimulation; removing the tool form the wellbore; and initiating the fracking of the perforated area using a fracking fluid.

公开(公告)号：US11492540B1

公开(公告)日：2022-11-08

申请号：US17229234

申请日：2021-04-13

Applicant: ExxonMobil Upstream Research Company

Inventor： Kevin A. Harnsberry ,  Paul Scott Northrop

IPC: C09K8/62 ,  C09K8/532 ,  C09K8/72 ,  E21B43/27 ,  E21B43/28 ,  E21B43/285 ,  C09K8/74

Abstract: Solvent mixtures for downhole elemental sulfur removal and formation stimulation, and methods for utilizing such solvent mixtures, are described herein. One method includes providing a solvent mixture that includes an elemental sulfur solvent fraction and an odorant fraction that includes a lactate ester solvent. The method also includes injecting the solvent mixture into a hydrocarbon well such that the elemental sulfur solvent fraction of the solvent mixture dissolves elemental sulfur deposited on well components, and contacting the solvent mixture with water such that the lactate ester solvent within the odorant fraction reacts with the water to generate lactic acid. The method further includes stimulating a formation through which the hydrocarbon well extends by flowing the solvent mixture including the lactic acid through the hydrocarbon well and into the formation.

公开(公告)号：US11332808B2

公开(公告)日：2022-05-17

申请号：US17223404

申请日：2021-04-06

Applicant: FREEPORT MINERALS CORPORATION

Inventor： John Warren Dean, Jr. ,  Christopher Wooten ,  Chase Zenner

IPC: C22B7/00 ,  C22B3/04 ,  G05D16/20 ,  C22B3/02 ,  C22B3/22 ,  C22B3/44 ,  C22B15/00 ,  G05D16/10 ,  E21B43/28

Abstract: Various embodiments provide a leaching solution monitoring module comprising a first leaching solution distribution system interface, a flow meter in fluid communication with the first leaching solution distribution system interface, the flow meter in fluid communication a 3-way pressure regulator, and a second leaching solution distribution system interface in fluid communication with the 3-way pressure regulator.