子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Releasable well tool stabilizer | US426769 | 1989-10-26 | US4960173A | 1990-10-02 | Michael L. Cognevich; Steven H. Shirk |
| A mechanism for accurately positioning a well tool in axially concentric relationship to a well conduit comprises a housing having a plurality of stabilizer linkages mounted thereon with one end of each linkage being pivotally secured to the housing and the other end free to move in an axial direction. A compression spring engages a force transmitting connection to the other ends of the stabilizer linkages to bias same to a radially expanded position engaging the conduit wall. The connection between the compression spring and the stabilizer linkage includes two telescopically related sleeve elements which are secured together by a shear screw. In the event that the stabilizer linkage becomes stuck in the well, upward jarring movements of the housing will shear the shear screw and permit the stabilizer linkages to collapse radially inwardly and thus permit removal from the well. | ||||||
| 142 | Apparatus and method for salvaging concentric piping members | US404201 | 1989-09-07 | US4947534A | 1990-08-14 | William C. Davenport |
| A system for non-destructively salvaging cemented concentric piping members by ramming the concentric piping members, thereby breaking the bond between the piping members and the concrete. The ramming of the concrete portions is accomplished by anchoring the cemented concentric piping members to an immovable base, then separating an outer pipe or casing and inner concentric pipes from each other by using an air hammer. | ||||||
| 143 | Detachable apparatus for preventing differential pressure sticking in wells | US476082 | 1983-03-17 | US4602690A | 1986-07-29 | Ronald P. Steiger |
| A removable porous layer is placed on the outside of various well implements. The layer allows movement of liquid toward sites of localized low pressure and therefore prevents differential pressure stickage of the well implements on the borehole wall. | ||||||
| 144 | Direct drive for deep-well drilling | US519296 | 1983-08-01 | US4485880A | 1984-12-04 | Friedhelm Makohl |
| A direct drive for deep-well drill bits on the Moineau displacement principle is provided with locking means detents (10, 11) which are disposed downstream of the working chambers (4) of rotor (3) and stator (2). Actuation of the locking means is effected by coupling throw-in members (13) introduced through the flushing passage from above. Passage through the working chambers and into the locking means detents groove (16, 20, 21) is rendered possible for the throw-in members on relative rotation of rotor and stator. | ||||||
| 145 | Method of removing conduit from curved borehole | US157909 | 1980-06-09 | US4287953A | 1981-09-08 | Raymond L. Mazza |
| A method for removing a conduit from a curved borehole by applying a compression load to the conduit to cause it to bend away from the inside of the borehole curve. | ||||||
| 146 | In-hole motor drill with bit clutch | US957179 | 1978-11-02 | US4232751A | 1980-11-11 | Kurt H. Trzeciak |
| An in-hole motor drill assembly has the rotor of the motor connected to the drill bit by a slidable rotary drive connection, and normally disengaged torque transmitting members are engageable, if desired, to lock the bit and motor housing together for rotation of the bit by rotation of the motor housing. The torque transmitting members also interlock to prevent disengagement when an upward pull is applied during rotation of the bit. | ||||||
| 147 | Method and apparatus for releasing a drill string held by differential pressure | US710610 | 1976-08-02 | US4033414A | 1977-07-05 | Michael F. Stroble |
| The invention disclosed includes a method of and apparatus for reducing the differential pressure holding a section of a drill string by lowering the hydrostatic pressure of the drilling fluid in the well bore adjacent the section being held. This is done by sealing the annulus between a fishing string and the well bore with a packer located above the section being held and lowering the level of drilling mud in the fishing string. In the embodiment described, the drilling mud level is lowered by swabbing drilling mud from the fishing string with a swab that is lowered and raised in the fishing string by a flexible swab line. A seal is provided between the swab line and the upper end of the fishing string to allow drilling mud to be pumped down the fishing string if necessary to for any reason, such as to circulate out a kick. The swab and the packer are provided with valves that can be opened to allow such circulation. | ||||||
| 148 | Well tool apparatus and method | US465081 | 1974-04-29 | US3942373A | 1976-03-09 | Austin S. Rogers |
| A new and improved well tool apparatus and method for sensing and testing conditions in a well, such as stuck drill pipe, temperature, metal creep, and the like, and for performing certain operations in the well, such as backing off, or loosening, the stuck pipe. | ||||||
| 149 | Inflatable packer device and method | US3762470D | 1971-04-26 | US3762470A | 1973-10-02 | EGGLESTON J |
| A method and device used in freeing a pipe string stuck in the bore of a well. An inflatable packer and setting tool may be run through the string to a position just below the lowermost free connection where the packer is inflated to sealingly close the upper end of the stuck fish. The fish may then be separated from the remainder of the string. After the fish is freed from the stuck position the packer and fish are retrieved. The bouyant packer and setting tool may be positioned by a weight depending from the packer on a preselected length of wire. The packer may comprise a bladder member inflatable with fluid from the setting tool. The setting tool may comprise a piston member in a cylinder, one end of which contains the inflating fluid, the other end of which is provided with gas generating means to force the fluid into the packer.
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| 150 | Method for cryogenically freeing drilling pipe | US3756317D | 1972-02-09 | US3756317A | 1973-09-04 | HALL G |
| A method of freeing drilling pipe in a well bore which has become stuck or seized through a differential pressure condition within the bore wherein a torque is maintained on the drill pipe, the zone of differential pressure determined within rough limits, a cryogenic tool or carrier is positioned so as to correspond generally to the zone, the tool then being actuated and forming a thin, temporary ice or frozen sheath between the bore hole and drill pipe thus losing a substantial portion of the bore hole permeability and consequent differential pressure, the torque and/or heat applied to the drill pipe breaking the ''''sheath'''' and continuing rotation of the pipe.
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| 151 | Method of retrieving a fish from a well bore | US3587748D | 1970-01-08 | US3587748A | 1971-06-28 | KERR WILLIAM I |
| A METHOD OF RETRIEVING A FISH FROM A WELL BORE WHERE THE UPPER END OF THE FISH IS OUTSIDE THE NORMAL WELL BORE AND CANNOT BE CAUGHT BY THE USUAL FISHING TOOLS WHERIN SUCH METHOD INCLUDES THE STEPS OF CUTTING A NOTCH IN THE SIDE OF THE UPPERMOST PORTION OF THE FISH WITHIN THE NORMAL WELL BORE AND THEREAFTER LOCATING A CUTTER ON SUCH NOTCH TO CUT THROUGH THE FISH SO THAT A RETRIEVING TOOL ENGAGES THE FISH AND RETRIEVES THE
SAME WHEN THE STRING WITH THE CUTTER AND RETRIEVING TOOL IS PULLED. |
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| 152 | Thermal well liner removal method and apparatus | US3565177D | 1969-04-02 | US3565177A | 1971-02-23 | HUTCHISON STANLEY O |
| The disclosure relates to removing heat expansible well liners from a well by contacting the liner with circulating hot fluid to uniformly increase the temperature of the liner and to assist in freeing the liner from the earth while simultaneously pulling the liner from the well.
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| 153 | Pulling apparatus | US3556214D | 1969-06-09 | US3556214A | 1971-01-19 | KELLNER JACKSON M |
| An apparatus for pulling retrievable subsurface devices mounted internally of a tubular string. The apparatus includes a hydraulic motor and a latching assembly. The apparatus is lowered through the tubular string bringing the latching assembly into gripping engagement with the retrievable device. Actuation of the hydraulic motor imparts an upward pulling force on the device which tends to dislodge the device from its seat.
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| 154 | Retrievable well screen | US3548937D | 1969-04-01 | US3548937A | 1970-12-22 | KIEL OTHAR M |
| 155 | Apparatus for selectively releasing cable-suspended well tools | US53684766 | 1966-03-23 | US3373817A | 1968-03-19 | CUBBERLY JR WALTER E; SAURENMAN DEAN F |
| 156 | Well tubing retrieving apparatus | US18377462 | 1962-03-30 | US3169593A | 1965-02-16 | BUS SR FRANKLIN L LE |
| 157 | Wash-over spear apparatus | US66562957 | 1957-06-12 | US2998078A | 1961-08-29 | FRANK CAROTHERS WILLIAM |
| 158 | Fishing tool apparatus | US67766057 | 1957-08-12 | US2965177A | 1960-12-20 | BUS SR FRANKLIN L LE; CECIL WARE |
| 159 | Guide assembly for washover pipe | US63935457 | 1957-02-11 | US2957525A | 1960-10-25 | KEMNITZ GEORGE E |
| 160 | Wash-over spear mechanism | US59478056 | 1956-06-29 | US2955655A | 1960-10-11 | CECIL WARE |
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