Downhole tools having controlled degradation and method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-029/02
E21B-047/06
E21B-047/00
E21B-033/12
E21B-034/06
E21B-043/116
E21B-047/18
E21B-047/12
E21B-034/00
출원번호
US-0599142
(2017-05-18)
등록번호
US-10221643
(2019-03-05)
발명자
/ 주소
Zhang, Zhihui
Xu, Zhiyue
Shyu, Goang-Ding
Flores Perez, Juan Carlos
Doane, James
Xu, Yingqing
출원인 / 주소
BAKER HUGHES, A GE COMPANY, LLC
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
0인용 특허 :
15
초록▼
A downhole assembly includes a downhole tool including a degradable-on-demand material, the degradable-on-demand material including a matrix material, and a unit in contact with the matrix material, the unit including a core comprising an energetic material configured to generate energy upon activat
A downhole assembly includes a downhole tool including a degradable-on-demand material, the degradable-on-demand material including a matrix material, and a unit in contact with the matrix material, the unit including a core comprising an energetic material configured to generate energy upon activation to facilitate degradation of the downhole tool and, an activator disposed in contact with the core, the activator having a triggering system including an electrical circuit, an igniter in the electrical circuit arranged to ignite the energetic material, a sensor configured to sense a target event or parameter within the borehole, and a control unit arranged to receive sensed signals from the sensor and to deliver a start signal to the electrical circuit in response to the sensed signals indicating an occurrence of the target event or parameter wherein, after the start signal is delivered from the control unit, the electrical circuit is closed and the igniter is initiated.
대표청구항▼
1. A downhole assembly comprising: a downhole tool including a degradable-on-demand material, the degradable-on-demand material including: a matrix material; and,a unit in contact with the matrix material, the unit including: a core embedded in the matrix material and comprising an energetic materia
1. A downhole assembly comprising: a downhole tool including a degradable-on-demand material, the degradable-on-demand material including: a matrix material; and,a unit in contact with the matrix material, the unit including: a core embedded in the matrix material and comprising an energetic material configured to generate energy upon activation to facilitate degradation of the matrix material; and,an activator disposed in contact with the core, the activator having a triggering system including an electrical circuit, an igniter in the electrical circuit arranged to ignite the energetic material, a sensor configured to sense a target event or parameter within the borehole, and a control unit arranged to receive sensed signals from the sensor, the control unit configured to deliver a start signal to the electrical circuit in response to the sensed signals indicating an occurrence of the target event or parameter;wherein, after the start signal is delivered from the control unit, the electrical circuit is closed and the igniter is initiated. 2. The downhole assembly of claim 1, wherein the electrical circuit further includes a timer, the control unit arranged to deliver the start signal to the timer, wherein, when a predetermined time period set in the timer has elapsed, the electrical circuit is closed. 3. The downhole assembly of claim 2, wherein in an open condition of the electrical circuit the igniter is inactive, and in a closed condition of the electrical circuit the igniter is activated, and the timer is operable to close the electrical circuit at an end of the predetermined time period. 4. The downhole assembly of claim 3, wherein the electrical circuit further includes a battery, the battery arranged to provide electric current to set off the igniter in the closed condition of the circuit. 5. The downhole assembly of claim 1, further comprising a perforation gun, wherein the sensor is configured to sense a shock wave that results from firing the perforation gun. 6. The downhole assembly of claim 1, wherein the sensor is configured to detect a pressure differential between an uphole area and a downhole area with respect to the downhole tool, and the event is related to the threshold value of the pressure differential. 7. The downhole assembly of claim 6, wherein the downhole tool includes a body having a piston chamber in fluidic communication with both the uphole area and the downhole area, and a piston configured to move in a downhole direction within the piston chamber when the threshold value of the pressure differential is reached. 8. The downhole assembly of claim 1, wherein the downhole tool further includes a vibratory element sensitive to a fluidic event, the sensor configured to detect vibrations of the vibratory element. 9. The downhole assembly of claim 1, wherein the sensor is configured to detect a mud pulse. 10. The downhole assembly of claim 1, wherein the sensor is configured to detect an electromagnetic wave. 11. The downhole assembly of claim 1, wherein the sensor is configured to detect at least one of a chemical element, an electrochemical element, and an electromagnetic tag. 12. The downhole assembly of claim 1, wherein the downhole tool is a frac plug configured to receive a frac ball. 13. The downhole assembly of claim 12, wherein a first component of the frac plug is formed of the degradable-on-demand material, and a second component of the frac plug is formed of the matrix material, the second component not including the energetic material, and the second component in contact with the first component. 14. The downhole assembly of claim 1, wherein the downhole tool is a flapper. 15. The downhole assembly of claim 1, wherein the unit further includes at least one layer disposed on the core. 16. The downhole assembly of claim 15, wherein the unit is a multi-layered unit and the at least one layer includes a support layer disposed on the core; and a protective layer disposed on the support layer, the support layer interposed between the core and the protective layer, wherein the support layer and the protective layer each independently comprises a polymeric material, a metallic material, or a combination comprising at least one of the foregoing, provided that the support layer includes a different material from the protective layer. 17. The downhole assembly of claim 16, wherein the protective layer has a lower corrosion rate than the support layer. 18. The downhole assembly of claim 16, wherein the matrix material has a cellular nanomatrix, a plurality of dispersed particles dispersed in the cellular nanomatrix, and a solid-state bond layer extending through the cellular nanomatrix between the dispersed particles. 19. A method of controllably removing a downhole tool of a downhole assembly, the method comprising: disposing the downhole assembly including the downhole tool in a downhole environment, the downhole tool including a degradable-on-demand material including a matrix material; and a unit in contact with the matrix material, the unit including a core embedded within the matrix material and comprising an energetic material configured to generate energy upon activation to facilitate degradation of the matrix material; and, an activator disposed in contact with the core, the activator having a triggering system including an electrical circuit, an igniter in the electrical circuit arranged to ignite the energetic material, a sensor configured to sense a target event or parameter within the borehole, and a control unit arranged to receive sensed signals from the sensor, the control unit configured to deliver a start signal to the electrical circuit in response to the sensed signals indicating an occurrence of the target event or parameter;sensing a downhole event or parameter with the sensor, the sensor sending the sensed signals to the control unit;comparing the sensed signals to a target value, and when the target value is reached, sending the start signal to the electrical circuit;closing the electrical circuit after the start signal is sent;initiating the igniter when the electrical circuit is closed;activating the energetic material within the core using the igniter; anddegrading the downhole tool. 20. The method of claim 19, wherein the electrical circuit further includes a timer, the control unit arranged to deliver the start signal to the timer, and initiating the igniter when a predetermined time period set in the timer has elapsed. 21. The method of claim 20, wherein the predetermined time period is zero, and the igniter is initiated substantially simultaneously when the start signal is delivered to the timer. 22. The method of claim 20, further comprising sending a time-changing signal to be sensed by the sensor, and changing the predetermined time period in response to the time-changing signal. 23. The method of claim 19, further comprising firing a perforating gun, wherein sensing the downhole event or parameter with the sensor includes sensing a shock wave that results from firing the perforating gun. 24. The method of claim 19, further comprising increasing fluid pressure uphole of the downhole tool, wherein sensing the downhole event or parameter with the sensor includes at least one of sensing fluid pressure uphole of the downhole tool, sensing a pressure differential between an uphole area and a downhole area with respect to the downhole tool, and sensing vibration of a vibratory element within the uphole area. 25. The method of claim 19, wherein sensing the downhole event or parameter with the sensor includes one or more of detecting frequencies of an electromagnetic wave and sensing a chemical or electrochemical element or electromagnetic tag. 26. The method of claim 19, wherein the target event or parameter includes a signal sent from an adjacent downhole tool. 27. A downhole assembly comprising: a downhole tool including a degradable-on-demand material, the degradable-on-demand material including: a matrix material; and,a unit in contact with the matrix material, the unit including: a core comprising an energetic material configured to generate energy upon activation to facilitate degradation of the downhole tool; and,an activator disposed in contact with the core, the activator having a triggering system including an electrical circuit, an igniter in the electrical circuit arranged to ignite the energetic material, a sensor configured to sense a target event or parameter within the borehole, and a control unit arranged to receive sensed signals from the sensor, the control unit configured to deliver a start signal to the electrical circuit in response to the sensed signals indicating an occurrence of the target event or parameter; anda vibratory element sensitive to a fluidic event, the vibratory element includes at least one of a reed and a caged ball configured to vibrate within fluid flow within a flowbore of the downhole assembly, the sensor configured to detect vibrations of the vibratory element;wherein, after the start signal is delivered from the control unit, the electrical circuit is closed and the igniter is initiated.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.