IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0645070
(2009-12-22)
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| 등록번호 |
US-8261829
(2012-09-11)
|
|
발명자
/ 주소 |
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| 출원인 / 주소 |
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| 대리인 / 주소 |
Arnold & Knobloch, L.L.P.
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| 인용정보 |
피인용 횟수 :
0 인용 특허 :
21 |
초록
▼
A well fishing method and system is described. In at least one example of the invention, a method of retrieval of material (e.g., a tubing string) having broken control or monitoring lines from a cased well is provided. The method comprises: isolating, from the well casing, broken lines above the ma
A well fishing method and system is described. In at least one example of the invention, a method of retrieval of material (e.g., a tubing string) having broken control or monitoring lines from a cased well is provided. The method comprises: isolating, from the well casing, broken lines above the material to be retrieved, thereby creating a substantially axial work passage; grasping the material to be removed through the substantially axial work passage; and pulling the material to be retrieved and the restrained lines from the well. Example shrouds, probes and other members are also described.
대표청구항
▼
1. A method of retrieval of material, having broken lines above the material, from a cased well, the method comprising: isolating, from the well casing, the broken lines above the material to be retrieved, thereby creating a substantially axial work passage;grasping the material to be removed throug
1. A method of retrieval of material, having broken lines above the material, from a cased well, the method comprising: isolating, from the well casing, the broken lines above the material to be retrieved, thereby creating a substantially axial work passage;grasping the material to be removed through the substantially axial work passage; andpulling the material to be retrieved from the well;wherein said isolating comprises:lowering, into the well, a shroud having a lower splayed end, wherein the outer diameter of the splayed end is sized to the inner diameter of the casing of the well and the lines such that the gap between the casing and the splayed end is less than the thickness of the lines;rotating in an oscillatory motion the lower splayed end at least a portion of the time when the lower splayed end is in contact with at least one of the broken lines;covering at least a portion of the material to be retrieved with the shroud; andresting the shroud on the material to be retrieved. 2. A method as in claim 1, wherein said rotating comprises oscillatory rotating in a pattern of about 180 degrees. 3. A method as in claim 1, further comprising isolating, from the substantially axial work passage, the broken control lines above the material to be retrieved. 4. A method as in claim 3, wherein said isolating from the substantially axial work passage comprises inserting an inner shroud inside an outer shroud, wherein said outer shroud isolates the broken lines from the casing and rests on the material to be retrieved, and wherein said inner shroud is inserted inside the lines, wherein an annulus is defined between the inner shroud and the outer shroud of a length sufficient to isolate broken lines that reside above the material to be retrieved wholly within the annulus. 5. A method as in claim 4 wherein said inserting an inner shroud inside the outer shroud and the broken lines comprises: lowering, though the outer shroud, the inner shroud sized to be longer than the length of any broken lines above the tool;contacting the outer shroud that is resting on the tool with the inner shroud;wherein an annulus is defined by the inner shroud and the outer shroud and at least one control line is isolated from the interior of the inner shroud and located in the annulus between the inner shroud and the outer shroud. 6. A method as in claim 1 wherein said grasping comprises: inserting an extracting tool through the substantially axial work passage and;removing the material to be retrieved, the outer shroud, the inner shroud, and the lines, together.
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