IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0681010
(2008-10-01)
|
등록번호 |
US-8826986
(2014-09-09)
|
국제출원번호 |
PCT/US2008/078409
(2008-10-01)
|
§371/§102 date |
20100625
(20100625)
|
국제공개번호 |
WO2009/046077
(2009-04-09)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
19 |
초록
▼
A downhole tool including a resilient body configured to be disposed on a drill string, the resilient body comprising a plurality of radial blades having an abrasive coating, wherein the radial blades are configured to deflect when inserted into downhole tubing, and wherein the resilient body is con
A downhole tool including a resilient body configured to be disposed on a drill string, the resilient body comprising a plurality of radial blades having an abrasive coating, wherein the radial blades are configured to deflect when inserted into downhole tubing, and wherein the resilient body is configured to allow rotation relative to the drill string. Additionally, a method for cleaning downhole tubing, the method including inserting a resilient scraper disposed on a drill string into the downhole tubing, the resilient scraper including a plurality of radial blades having an abrasive coating. The method further including rotating the drill string, and contacting the resilient scraper to an internal wall of the downhole tubing.
대표청구항
▼
1. A method comprising: inserting a resilient scraper disposed on a drill string into a segment of downhole tubing, the resilient scraper including: a resilient body having a hollow core section and a center defined therein,a first blade coupled to the resilient body and extending away from the resi
1. A method comprising: inserting a resilient scraper disposed on a drill string into a segment of downhole tubing, the resilient scraper including: a resilient body having a hollow core section and a center defined therein,a first blade coupled to the resilient body and extending away from the resilient body in a tangential direction, the first blade having a first end and a second end, wherein the first end of the first blade is in closer proximity to the resilient body than the second end of the first blade,wherein the tangential direction is a direction that is tangent to a circumference of the resilient body;contacting an internal wall of the segment of downhole tubing with the first blade;rotating the resilient scraper relative to the drill string within the segment of downhole tubing; anddeflecting the first blade against the segment of downhole tubing such that the second end of the first blade is deflected toward the center of the resilient body. 2. The method of claim 1, wherein the core section of the resilient body has an internal diameter that allows the resilient scraper to fit over a portion of the drill string. 3. The method of claim 1, wherein the second end of the first blade is a distal end of the first blade. 4. The method of claim 3, wherein the first end of the first blade extends away from the resilient body in a first direction, and the second end of the first blade extends away from the resilient body in a second direction such that the first blade is curved as the first blade extends from the resilient body. 5. A method comprising: inserting a resilient scraper disposed on a drill string into a segment of downhole tubing, the resilient scraper including: a resilient body having a hollow core section and a center defined therein,a first blade coupled to the resilient body and extending away from the resilient body in a first tangential direction, the first blade having a first end and a second end, wherein the first end of the first blade is in closer proximity to the resilient body than the second end of the first blade, anda second blade coupled to the resilient body and extending away from the resilient body in a second tangential direction, the second blade having a first end and a second end, wherein the first end of the second blade is in closer proximity to the resilient body than the second end of the second blade,wherein each of the first and second tangential directions are directions that are tangent to a circumference of the resilient body;contacting an internal wall of the segment of downhole tubing with the first blade;allowing rotation of the resilient body relative to the drill string during operation downhole; anddeflecting the first blade against the segment of downhole tubing such that the second end of the first blade is deflected toward the first end of the second blade. 6. The method of claim 5, wherein each of the first blade and the second blade comprise at least one selected from a group consisting of polytetrafluoroethylene, polyaryletheretherketone, and carbon fiber. 7. The method of claim 5, wherein deflecting the first blade against the downhole tubing comprises deflecting the first blade such that the second end of the first blade is deflected toward the center of the resilient body. 8. The method of claim 5, further comprising deflecting the second blade against the downhole tubing such that the second end of the second blade is deflected toward the center of the resilient body. 9. A method comprising: providing a resilient scraper, the resilient scraper including: a resilient body rotatable relative to a drill string during operation downhole, the resilient body having a hollow core section and a center defined therein,a first blade coupled to the resilient body and extending away from the resilient body in a first tangential direction, the first blade having a first end and a second end, wherein the first end of the first blade is in closer proximity to the resilient body than the second end of the first blade, anda second blade coupled to the resilient body and extending away from the resilient body in a second tangential direction, the second blade having a first end and a second end, wherein the first end of the second blade is in closer proximity to the resilient body than the second end of the second blade,wherein a blade angle is formed between the first blade and the second blade, the blade angle defined as an angle formed between a direction in which the first blade extends away from the resilient body and a direction in which the second blade extends away from the resilient body;inserting the resilient scraper disposed on the drill string into a segment of downhole tubing;contacting an internal wall of the segment of downhole tubing with the first blade; anddeflecting each of the first blade and the second blade against the segment of downhole tubing such that the second end of the first blade and the second end of the second blade are each deflected toward the center of the resilient body and the blade angle formed between the first blade and the second blade is changed. 10. The method of claim 9, wherein the blade angle formed between the first blade and the second blade is between 20 degrees and 60 degrees. 11. The method of claim 9, wherein the first blade and the second blade are configured to provide a helical flow path for drilling fluid to flow along a length of the resilient scraper. 12. The method of claim 9, wherein the second end of the first blade is a distal end of the first blade, and the second end of the second blade is a distal end of the second blade. 13. The method of claim 9, wherein the direction in which the first blade extends away from the resilient body is a first tangential direction, and the direction in which the second blade extends away from the resilient body is a second tangential direction, wherein each of the first and second tangential directions are directions that are tangent to a circumference of the resilient body. 14. The method of claim 9, further comprising compressing the first blade against the inner wall of the segment of downhole casing along the direction in which the first blade extends from the resilient body. 15. The method of claim 9, further comprising rotating the drill string within the segment of downhole tubing. 16. The method of claim 9, further comprising removing the drill string and the resilient scraper from within the segment of downhole tubing.
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