Tripping jarring stuck releasing method
The invention belongs to the technical field of underground operation, and provides a tripping jarring stuck releasing method. The method comprises the following steps: (1) putting down an in-well pipe string after the in-well pipe string is stuck during lifting and clamping the in-well pipe string...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The invention belongs to the technical field of underground operation, and provides a tripping jarring stuck releasing method. The method comprises the following steps: (1) putting down an in-well pipe string after the in-well pipe string is stuck during lifting and clamping the in-well pipe string through an oil pipe elevator; (2) descending a 1-2 m supporting short section of the same specification as the in-well pipe string, keeping that the lower edge of a supporting short section coupling can be 0.1-0.3 m higher than the upper plane of the oil pipe elevator when the hanging load of the in-well pipe string is reduced to 0, then locking a handle of the oil pipe elevator and removing a hanging ring; (3) lifting a tripping short section of the same specification as the in-well pipe string, and manually screwing a male buckle of the tripping short section in thread of a female buckle of the supporting short section coupling for 2-3 grids; (4) slowly lifting the in-well pipe string until the lifting force for lifting the in-well pipe string is at designed tonnage to trip the supporting short section and the tripping short section, and implementing jarring stuck releasing on a sticking point of the in-well pipe string by means of inertia and weight of high-speed descending. According to the method, the sticking point can be jarred without descending a jarring tool; the method is simple, easy, economic and effective. |
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