| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | Retrieving tool | US43352654 | 1954-06-01 | US2833353A | 1958-05-06 | WALTON GEORGE W; MCCARTY DONALD L |
| 62 | Magnetic junk catcher | US2734767D | US2734767A | 1956-02-14 | ||
| 63 | Magnetic retrieving tool | US24669351 | 1951-09-14 | US2729494A | 1956-01-03 | JOB TROWBRIDGE GEORGE WILLIAM |
| 64 | Magnetic plug for core bits | US12806649 | 1949-11-18 | US2628822A | 1953-02-17 | HERNDON LAWRENCE O |
| 65 | Magnetic junk basket for well bores | US1803848 | 1948-03-30 | US2556849A | 1951-06-12 | NOLLEY JOHN P; CANNON GEORGE E |
| 66 | Magnetic fishing tool | US66779646 | 1946-05-07 | US2539435A | 1951-01-30 | KIRBY JOHN H |
| 67 | Magnetic fishing tool | US11554049 | 1949-09-13 | US2522294A | 1950-09-12 | NOBLE JOHN D |
| 68 | Electromagnetic fishing tool | US3806935 | 1935-08-27 | US2087034A | 1937-07-13 | ARVI JAMESON |
| 69 | Removing broken tools from bore holes | US49498021 | 1921-08-24 | US1589678A | 1926-06-22 | THEODOR BORNEMANN |
| 70 | Apparatus for removing drill bits from oil wells | US67073323 | 1923-10-25 | US1522868A | 1925-01-13 | CRUTS LESTER A |
| 71 | DOWNHOLE MAGNET, DOWNHOLE MAGNETIC JETTING TOOL AND METHOD OF ATTACHMENT OF MAGNET PIECES TO THE TOOL BODY | US15858281 | 2017-12-29 | US20180238144A1 | 2018-08-23 | Simon Leiper; Kevin Robertson |
| A tool for suspending in a well retrieves various metal debris from the well, and includes an elongated tool body with a plurality of magnets included in a plurality longitudinal ridges which are circumferentially spaced. In the method a plurality of magnets can be positioned within openings, recesses, or pockets in each ridge, and held in place by one or more retaining plates, the tool being connected to a drill string and lowered into a well. | ||||||
| 72 | Method and apparatus for catching and retrieving objects in a well | US15209217 | 2016-07-13 | US09903183B2 | 2018-02-27 | Mark W. DeRouen, Sr. |
| A magnet assembly having selectively removable magnet members can be attached to, or placed in the vicinity of, a conventional bell nipple or riser on a drilling rig to generate a magnetic field within a wellbore. The magnetic field catches falling metal objects and prevents such objects from passing beyond the magnet assembly and entering subterranean portions of a wellbore. Hatch doors are provided for easy access to inner portions of the magnet assembly. | ||||||
| 73 | MAGNETIC DEPOSITION PREVENTION SUBASSEMBLY AND METHOD OF USE | US14870765 | 2015-09-30 | US20170051576A1 | 2017-02-23 | DUDLEY J. PERIO, JR. |
| An apparatus and method for controlling and/or minimizing the formation or accumulation of unwanted deposits on the inside of fluid flow paths by employing at various locations along the path an assembly of permanent magnets oriented such that the fluid flow is preferably from the North magnetic pole to the South magnetic pole. The apparatus including an upper portion and a lower portion with a cylindrical magnet disposed on the surface of the upper portion. The lower portion includes a safety shelf to prevent compression of the magnet by the upper portion and the lower portion. | ||||||
| 74 | Method and Apparatus for Catching and Retrieving Objects in a Well | US15209217 | 2016-07-13 | US20160319638A1 | 2016-11-03 | Mark W. DeRouen, SR. |
| A magnet assembly having selectively removable magnet members can be attached to, or placed in the vicinity of, a conventional bell nipple or riser on a drilling rig to generate a magnetic field within a wellbore. The magnetic field catches falling metal objects and prevents such objects from passing beyond the magnet assembly and entering subterranean portions of a wellbore. Hatch doors are provided for easy access to inner portions of the magnet assembly. | ||||||
| 75 | Downhole tool and method | US13575895 | 2011-02-04 | US09260941B2 | 2016-02-16 | James Linklater |
| A cleaning tool (1) for use in cleaning ferrous material from a wellbore has a magnetic cleaning functionality by provision of magnets (5) in an Halbach array on a downhole tool component of a workstring. The Halbach array may be an Halbach cylinder positioned on a mandrel wherein the magnetic field is external to the cylinder with substantially zero magnetic field within the tool. | ||||||
| 76 | PETROLEUM WELL DRILL- OR COILED TUBING STRING MOUNTED FISHING TOOL | US14233357 | 2013-01-14 | US20150211316A1 | 2015-07-30 | Trond Skjeie |
| A petroleum well drill- or coiled tubing string mounted fishing tool includes a main body including a lower housing with a magnet having at least one magnet surface facing downwards in the well at a lower end of the lower housing and arranged for catching and holding undesired magnetic objects present in the well, the main body provided with a connector to the drill- or coiled tubing string at its upper end. The tool further includes a generally cylindrical upper housing with a central channel with laterally directed curl flow forming nozzles through the cylindrical wall of the upper housing, the nozzles leading out into one or more helical grooves between helical ridges, the magnet including permanent magnets arranged in a magnetization pattern which concentrates their combined magnetic flux through the downwards facing surface, the upper housing's vertical channel extending near its lower end to peripherally directed channels extending to an outer wall of the lower housing about the magnets and leading to axially directed peripheral nose ports at a peripheral lower end of the lower housing and arranged for flushing fluid ahead of the magnet, the central channel provided with a vertically displaceable cylindrical flow control sleeve which is provided with a closing seat near its lower end so as for receiving a ball for shutting off the flow to the nose ports and redirecting the flow through apertures in the wall of the sleeve to the curl flow forming nozzles. | ||||||
| 77 | DOWNHOLE TOOL SHOCK ABSORBER WITH ELECTROMAGNETIC DAMPING | US14498250 | 2014-09-26 | US20150083438A1 | 2015-03-26 | Jia Tao; Mohamed Mehdi |
| A technique facilitates absorption of shock experienced by a tool in a borehole. The technique comprises coupling a tool into a tool string sized for delivery into the borehole. A shock absorber is positioned along the tool string to absorb shock loads incurred by the tool. The shock load experienced by the tool induces an electromagnetic force in the shock absorber which acts in a direction to mitigate the shock load. | ||||||
| 78 | Magnetic retrieval apparatus and method for retaining magnets on a downhole magnetic retrieval apparatus | US12794354 | 2010-06-04 | US08678091B2 | 2014-03-25 | Jonathan F. Nelson; Gregory L. Hern |
| Magnetic retrieval tools for use in a wellbore or other tubular member to remove metallic debris. A magnetic retrieval tool includes a tool body having a central shaft with a plurality of ribs that project radially outwardly therefrom. The ribs present lateral sides that have recesses formed therein. Magnet bars are retained within the recesses by wedge members and retaining rings. The magnet bars include a hollow protective housing that encloses a plurality of magnets. Retaining plugs are used to secure the magnets within the housing. | ||||||
| 79 | Method and Apparatus for Catching and Retrieving Objects in a Well | US13553915 | 2012-07-20 | US20130020096A1 | 2013-01-24 | Mark W. DeRouen, SR. |
| A magnet assembly can be attached to, or placed in the vicinity of, a conventional bell nipple to generate a magnetic field within the central bore of the bell nipple. The magnetic field catches falling metal objects and prevents such objects from passing beyond the bell nipple and entering the subterranean portions of a wellbore. An optional diverter assembly slows the velocity of falling metal objects before reaching the magnet assembly, while also wiping the outer surface of pipe or other items lowered into a wellbore. | ||||||
| 80 | DOWNHOLE TOOL | US13002160 | 2009-07-16 | US20110168404A1 | 2011-07-14 | George Telfer; James Linklater; James Atkins |
| A cleaning tool (1) for use in cleaning ferrous material from a wellbore has a magnetic cleaning element (14) mounted to a tool body (2) within a slot (5) using a releasable concealed interference fit fastener assembly (15) comprising a fastener member having a head (16), and a shank (17) with a configured end (18) and a deformable fastener ring (20) adapted to fit closely over the shank, and a press-fit collar (21) adapted to deform the deformable fastener ring upon the configured end of the shank when assembled, and wherein the respective head and collar are each flanged to permit an interference fit with a corresponding contact surface of the tool body around said slot. | ||||||
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