| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 241 | Turbulent flow drill collar | US3554307D | 1969-07-03 | US3554307A | 1971-01-12 | YOUNT NOLEN A |
| A tubular drill string member having grooves formed in the outer surface thereof extending circumferentially thereabout and longitudinally thereof. The grooves include short sections or lengths of first groove portions which generally parallel the longitudinal centerline of the tubular drill string member or drill collar and short sections or lengths of second groove portions which are inclined generally 15* relative to a plane normal to the longitudinal centerline of the drill collar. The second groove portions interconnect the adjacent ends of adjacent first groove portions and the first and second groove portions of each groove are disposed generally in a helical path extending along and about the corresponding drill collar.
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| 242 | Mechanism for widening galleries applicable to drilling machines | US3491843D | 1967-03-06 | US3491843A | 1970-01-27 | RODRIGUEZ JOSE MOLINA |
| 243 | Coupling and rod system for rock drills | US3424479D | 1966-01-11 | US3424479A | 1969-01-28 | DITSON J D; CANTREL JAMES F |
| 244 | Helical grooved tubular drill string | US52785866 | 1966-02-16 | US3360960A | 1968-01-02 | MASSEY DULAS L |
| 245 | Casing centralizer and well bore wiper | US39622264 | 1964-09-14 | US3351136A | 1967-11-07 | NELSON FRED B |
| 246 | Hollow auger coupling | US33433163 | 1963-12-30 | US3301338A | 1967-01-31 | DICKINSON ROBERT E |
| 247 | Drill collar with helical grooves | US36955864 | 1964-05-22 | US3194331A | 1965-07-13 | ARNOLD EDWARD P |
| 248 | Hollow auger | US32967263 | 1963-12-11 | US3178210A | 1965-04-13 | DICKINSON ROBERT E |
| 249 | Tubular drill string members | US3125173D | US3125173A | 1964-03-17 | ||
| 250 | Ice drill | US81959259 | 1959-06-11 | US3025917A | 1962-03-20 | KNOBLAUCH ARTHUR W |
| 251 | Tubular drill string member | US79718059 | 1959-03-04 | US2999552A | 1961-09-12 | FOX FRED K |
| 252 | Tunneling machine clean-up apparatus | US73363058 | 1958-05-07 | US2920878A | 1960-01-12 | KANDLE CHARLES W |
| 253 | Shot-hole drilling apparatus | US45680854 | 1954-09-17 | US2809014A | 1957-10-08 | LAWRENCE KENNETH M; RICKEL WESLEY K |
| 254 | Flexible drill pipe | US73833547 | 1947-03-31 | US2515365A | 1950-07-18 | ZUBLIN JOHN A |
| 255 | Auger drill | US79451747 | 1947-12-30 | US2504601A | 1950-04-18 | SPRY EARL M |
| 256 | Combination sucker rod guide and paraffin scraper | US40602241 | 1941-08-08 | US2307688A | 1943-01-05 | LARSON ALBERT D |
| 257 | Drill-pipe buffer | US18868238 | 1938-02-04 | US2166937A | 1939-07-25 | BETTIS WILLIAM I |
| 258 | Means and method of centrally positioning alpha tube within an open well hole | US63628032 | 1932-10-05 | US1959368A | 1934-05-22 | BENTON KENNEDYE CHARLES |
| 259 | Miner's auger. | US1899729315 | 1899-09-02 | US675720A | 1901-06-04 | DEEMER JOHN |
| 260 | MILLS WITH SWARF DISPOSAL IN WELLBORES | US15471544 | 2017-03-28 | US20180283120A1 | 2018-10-04 | Daniel R. Hart; Andrew D. Ponder; Lambertus C. Joppe |
| A milling apparatus for cutting a tubular in a wellbore includes a cutting element on a tool body configured to cut the tubular in a wellbore when the cutting element is activated when the tool is moving upward inside the tubular. The cutting element cuts the tubular to form cuttings that fall into an annulus between the tubular and the wellbore. An agitator below the cutting element agitates the cuttings in the annulus to aid the cuttings to move from the annulus into the wellbore below the milling apparatus. | ||||||
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