Claims
- 1. A well abandonment process for cutting and retrieving an offshore well casing, the process comprising:
making a trip to the well wherein the following steps are performed, the steps comprising:
pulling a seal assembly from the wellhead, cutting the casing, griping the casing, and retrieving the seal assembly and cut casing.
- 2. The process of claim 1, wherein the pulling a seal assembly from the wellhead comprises engaging the seal assembly with a seal assembly retrieval tool and raising the seal assembly retrieval tool above the wellhead, whereby the seal assembly is pulled from the wellhead.
- 3. The process of claim 1, wherein said cutting the casing comprises:
positioning a casing cutter at a desired cut depth; engaging a spear with the casing; and operating the casing cutter.
- 4. The process of claim 1, wherein said gripping the casing comprises:
positioning a spear below the wellhead; and manipulating the spear, whereby the spear grips the casing.
- 5. The process of claim 1, wherein said retrieving the seal assembly and cut casing comprises raising the seal assembly and the cut casing from the well to the surface of the water above the offshore well.
- 6. The process of claim 1, further comprising: making a separate trip comprising setting isolation plugs.
- 7. The process of claim 1, further comprising: making a separate trip comprising pulling a wear bushing from a wellhead of the well.
- 8. An apparatus for cutting and retrieving an offshore well casing, said apparatus comprising:
a seal assembly retrieval tool for releasing a seal assembly of the well casing, wherein said seal assembly retrieval tool is connectable to a drill string for suspension from the drill string; a spear in mechanical communication with said seal assembly retrieval tool, wherein said spear is engageable with the well casing; a mud motor in mechanical communication with said spear; and a casing cutter in mechanical communication with said mud motor, wherein said casing cutter is driven by said mud motor to cut the well casing.
- 9. The apparatus as claimed in claim 8, further comprising a spear bumper jar in mechanical communication with said seal assembly retrieval tool and said spear, wherein the mechanical communication of said spear and said seal assembly retrieval tool is through said spear bumper jar.
- 10. The apparatus as claimed in claim 8, further comprising a mud motor bumper jar in mechanical communication with said spear and said mud motor, wherein the mechanical communication of said mud motor and said spear is through said mud motor bumper jar.
- 11. The apparatus as claimed in claim 9, further comprising a mud motor bumper jar in mechanical communication with said spear and said mud motor, wherein the mechanical communication of said mud motor and said spear is through said mud motor bumper jar, wherein the stroke of the mud motor bumper jar is longer than the stroke of the spear bumper jar.
- 12. The apparatus as claimed in claim 8, further comprising a drill collar in mechanical communication with the seal assembly retrieval tool and the spear.
- 13. The apparatus as claimed in claim 8, further comprising a drill pipe space out in mechanical communication with the seal assembly retrieval tool and the spear.
- 14. An apparatus for cutting and retrieving an offshore well casing, said apparatus comprising:
a seal assembly retrieval tool for releasing a seal assembly of the well casing, wherein said seal assembly retrieval tool is connectable to a drill string for suspension from the drill string; a first bumper jar in mechanical communication with said seal assembly retrieval tool; a spear in mechanical communication with said first bumper jar, wherein said spear is engageable with the well casing; a second bumper jar in mechanical communication with said spear; a mud motor in mechanical communication with said second bumper jar; and a casing cutter in mechanical communication with said mud motor, wherein said casing cutter is driven by said mud motor to cut the well casing.
REFERENCE TO PRIOR APPLICATION
[0001] This application claims the benefit of U.S. Provisional Application No. 60/220,293, filed Jul. 24, 2000.
Provisional Applications (1)
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Number |
Date |
Country |
|
60220293 |
Jul 2000 |
US |