US3552507A - System for rotary drilling of wells using casing as the drill string - Google Patents
System for rotary drilling of wells using casing as the drill string Download PDFInfo
- Publication number
- US3552507A US3552507A US778509A US3552507DA US3552507A US 3552507 A US3552507 A US 3552507A US 778509 A US778509 A US 778509A US 3552507D A US3552507D A US 3552507DA US 3552507 A US3552507 A US 3552507A
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- United States
- Prior art keywords
- casing
- mandrel
- bore
- bit assembly
- gripping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
- E21B10/66—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/34—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools of roller-cutter type
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/02—Rod or cable suspensions
- E21B19/06—Elevators, i.e. rod- or tube-gripping devices
- E21B19/07—Slip-type elevators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
- E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
Definitions
- the drilling string generally comprises a relatively small diameter string of drill pipe having the drill bit threadedly connected to the lower end thereof, the bit size being such as todrill aborehole of substantially larger diameter than that of the drill string.
- the borewall In such conventional drilling procedures, the borewall, particularly where constituted by relatively soft formations, will tend to slough off or cave, this action being frequently accentuated by the washing action of the drilling fluid. This will often seriously interfere with the drilling operation and may cause sticking of the drilling string with its many attendant problems. Also, the operations in the open hole, as when withdrawing the drill string to change bits and returning it into the borehole, and the procedure for running casing to line the borehole, are all subject to many hazards resulting from the fact that the borewall is exposed during all such operations.
- a system which employs the well casing itself as the drill pipe.
- a bit assembly which is bodily insertable and withdrawable through the bore of the well casing, is releasably secured to the lower end thereof, and includes radially expansible cutter elements to enable drilling of a borehole having a diameter such as to freely accommodate the casing/drill pipe.
- a drive connection is'provided for transmitting rotational power to the upper end of the casing string and includes a drive connector means which is slidably insertable into the upper end of the casing and includes casing-gripping means which are nonthreadedly engageable with the casing wall for transmitting rotational torque to the casing.
- the borewall will at all times be fully supported by the casing which will remain in the wellbore while the bit assembly may be withdrawn for repair or replacement.
- effective rotary torque can be applied to the casing with minimum manipulative operations for making and releasing the drive connection.
- the system in accordance with this invention will obviate the difficulties encountered in more conventional rotary drilling systems; will assure protection for the wall of the wellbore throughout the drilling; permits. ready installation and removal of the bit assembly through the bore of the casing; and provides simple means for attaching and releasing the drive connection to the casing when adding sections thereto.
- FIGS. 1A and 1B together, comprise a lorigitudinal, partly sectional view of a drilling system in accordance with the present invention in place in a wellbore, the parts being shown in the positions occupied while drilling proceeds;
- FIG. 2 is a longitudinal, partly sectional view on a somewhat enlarged scale of the lower portion of the drill string and bit assembly showing the parts ofthe bit assembly in the released position preparatory to withdrawing the bit assembly through the casing;
- FIG. 3 is a view similar to FIG. 2 showing the bit assembly in the drilling position with the expansible cutters extended;
- FIG. 4 is a view generally similar to FIGS. 2 and 3, showing a fishing tool inserted in the bit assembly preparatory to withdrawing the latter through the casing;
- FIG. 5 is a view similar to FIG. 4 showing the bit assembly in process of being withdrawn through the casing string;
- FIGS. 6, 7 and 8 are cross-sectional views taken, respectively, along lines 6-6, 7-7 and 8-8 of FIG. 2;
- FIG. 9 is a cross-sectional view taken along line 9-9 of FIG. 3;
- FIG. 10 is a longitudinal, partly sectional view of the drive connection assembly employed for transmitting rotary drive torque to the upper end of the casing, the parts being shown in their nondrive relation;
- FIG. 11 is a view similar to FIG. l0 showing the parts in thc casing drive relation',
- FIG. 12 is a cross-sectional view taken along line l2-l2 of FIG. 10 showing the parts of the torsional drive elements in their nondriving position;
- FIG. 13 is a view similar to FIG. 12 showing thc torsional drive elements in their drive positions;
- FIG. 14 is a longitudinal, partly sectional view of a modified form of the bit assembly with the expansible cutters in retracted condition
- FIG. 15 is a view similar to FIG. I4 showing the bit assembly locking into the casing string and with the expansible cutters in the extended position;
- FIG. 16 is a cross-sectional view taken along line 16-16 of FIG. 14;
- FIG. 17 is a cross-sectional view taken along line I7-l7 of FIG. 15.
- FIGS. 1A and 1B show the assemblage of apparatus comprisingthe system, disposed in a wellbore W, the upper end portion of which is lined with a conventional conductor casing I( surmounted by a wellhcad fitting F which includes a conventional slip bowl H adapted to receive hanger slips G (shown in broken lines) for supporting the casing string at appropriate stages of operation.
- the drilling system includes a string of casing C which funetions as the drill pipe and which may include oneor more ccntralizer sections S for maintaining the drill string in substantially axial alignment in the wellbore.
- a string of casing C which funetions as the drill pipe and which may include oneor more ccntralizer sections S for maintaining the drill string in substantially axial alignment in the wellbore.
- the string of casing is connected to a tubular body I0 forming a part thereof and which also forms a housing for the bit assembly, designated generally by the letter A, which is slidably insertable into and removable from bore 11 of the housing.
- the overall dimensions of the bit assembly are such that it is also freely insertable and removable through the bore of casin C.
- the third major element of the drilling system comprises a connector assembly, designated generally by the letter B, through which rotary power is transmitted to the casing string for rotating the bit assembly in a manner to be described subsequently.
- the bit assembly comprises a tubular cage l2 having a bore 12a and provided with a plurality of angularly spaced radial Openings 13 therein in which are mounted latching dogs 14 for radial movement into and out of an annular locking recess l5 provided in the wall of housing l0.
- the exterior of cage l2 placing dogs 14 opposite recess l5.
- An annular packing such as Ohrring l9, is mounted about the upper end of cage l2 to seal with thc wall of bore ll when the bit assembly is fully insertcd in the housing.
- a tubular dog actuating sleeve 20 having a bore 20a is slidably mounted in the bore of cage l2 and is provided at an intermediate point thereon with external enlargements 2l. adapted to engage the inner faces of dogs t4 when in registration therewith to urge the latter outwardly into recess 15 to lock the cage to housing l0, and to release the dogs when moved out of registration with the dogs.
- the portion of latching sleeve above enlargements 2l is reduced in external diameter to define the upwardly facing shoulder Z9 and defines with cage l2 the annular space 22.
- a spacer collar 23 is inserted concentrically between the upper portion of sleeve 20 and cage 12 and is threadedly secured at 24 to the upper end of the cage.
- spacer collar 23 terminates above the shoulder 29 and a coil spring 2S is mounted in compression in annular space 22 between the inner end of spacer collar 23 and shoulder 29.
- An annular seal 26 is disposed about the upper end portion of sleeve 20 in slidable sealing engagement with the bore wall of spacer collar 23.
- An annular latching groove 27 is provided in the bore wall of sleeve 20 for purposes to be described later.
- Spring 25 functions to normally bias sleeve 20 downwardly toward the position placing enlargement 2l in registration with dogs 14.
- Sleeve 20 is initially held in retracted position compressing spring 25, (FlG. 2) by shear pins 60 connecting it to a running tool R, a part of which is shown in FlG. 2 but which, since it is generally conventional, does not itself form a part of the present invention.
- Running tool R includes an over-shot portion 0 also initially connected by shear pins 61 to the upper end of collar 23.
- the running tool also includes a jarring sleeve .l which, when it is desired to release locking sleeve 20, may be actuated through manipulation of the running string in the well-known manner to apply a downwardly directed blow against the upper end of sleeve 20 sufficient to break shear pins 60, whereupon spring will expand thrusting sleeve 20 downwardly to cause enlargements 2l to engage the inner faces of dogs 14 and push them outwardly into locking engagement in recess l5 (FIGS. l and 3) effectively locking the bit assembly to housing 10. Thereupon, upward pull applied to over-shot 0 will act to break shear pins 6l, releasing the running tool for withdrawal from the casing.
- a jarring sleeve .l which, when it is desired to release locking sleeve 20, may be actuated through manipulation of the running string in the well-known manner to apply a downwardly directed blow against the upper end of sleeve 20 sufficient to break shear pins 60,
- the lower end portion of latching sleeve 20 is also reduced in external diameter to extend slidably into the lower end of cage l2 and an annular seal 28 is provided between the lower end portion of the latching sleeve and the cage.
- the lower end portion of cage l2 is provided with an externally threaded pin 30 receivable in the internally threaded socket 3l ofa cylinder 32 which carries an annular seal element 33 in sealing engagement with the lower end of bore ll.
- a piston 35 is slidably mounted in cylinder 32 and is connected to a piston rod 36 which projects downwardly through an opening in the lower end of cylinder 32 into an underreamer body 37 which is formed as an extension of cylinder 32.
- underreamer body 37 The lower end of underreamer body 37 is formed to provide a reduced diameter tubular extension 38 having an internally threaded box 30 at its lower end into which is screwed a conventional rotary bit 40.
- Extension 38 and bit 40 together, comprise the pilot bit section of the bit assembly.
- Extension 38 carries a plurality of fixed radially extending under-reaming cutters 41 adapted to cut a hole diameter to the gage of underreamer body 37.
- a piston rod 36 extends slidably through a central bore 42 in extension 38 and bears against a coil spring 43 disposed in com pression between the lower end of piston rod 46 and the upper end of bit 40.
- An annular seal element 44 is arranged to seal between bore 42 and the lower end of the piston rod.
- a plurality ofunderreamer cutters 45 are pivotally mounted in longitudinal slots 46 in the wall of body 37 for radial move ment between positions projecting outwardly at right angles to the axis of the bit assembly and retracted positions generally parallel to the axis of the assembly. When retracted, the cutters will be substantially fully enclosed within slots 46 so that the bit assembly will be freely movable through casing C and into and out of housing lf). Cutters 45 are rollably mounted on hollow shafts 45a (FlG. 2) which terminate in flattened heads 47 which extend into slots 46 and are mounted for pivotal movement about hollow pivot pins 48 extending transversely of slots 46 (FIGS. 7 and 9). The inner ends of heads 47 are formed as sector gears 49 each of which is arranged to mesh with a rack 50 formed on the opposed exterior face of piston rod 36, which is made generally square in cross section to accommodate the several racks.
- passages 53 (FlGS. 3, 7 and 9) communicate the interior of extension 38 with passages 54 through hollow pivot pins 48 and thence through passages 55 in shafts 45a exiting through the outer ends of cutters 45.
- llit 40 is provided with fluid jet passages 56 which communicate with the interior of extension 38.
- the reciprocating movements of piston 35 in cylinder 32 are limited in one direction by the inner end of pin 30, the fully retracted positions of cutters 45, and at the opposite end by an internal shoulder 32a in cylinder 32, the fully extended position ofcutters 45.
- Drive connector assembly B illustrated in FlGS. l und l0 to I3, inclusive, includes a tubular mandrel or support member having an axial bore 60a and provided with a threaded box 6l at its upper end for connection to a power source.
- a tu bular bushing 62 is rotatably mounted about the upper portion of the mandrel on antil'riction bearings 63 and has a radially extending flange 64 dimensioned to rest on the upper end of the uppermost section of casing C which will normally project upA wardlv above the upper end of the well bore.
- Flange 64 forms stop means engageable with the Upper end of the casing scction to limit inward movement of the connection assembly into the borr.l ofthe casing
- the inner end ofbushing 62 carries an inwardly turned lip 65 on which a plurality ofpipc-gripping wedges or slips 66 are liingedly supported by means of out4 wardlv projecting hanger lips 67 formed on the upper' ends of the slips.
- An upv-.'artlly and inwardly tapering conical expander 68 is disposed about mandrel 60 between the latter and slips 66 and is provided internally with a section of relatively coarse lefthand threads 6 erzgageable by a complementary section of threads 'ffl formed on mandrel 6() intermediate the ends thereof.
- the lower portion ofexparider 66 is provided with an annular outwardly openingl recess '7l defined by a cylindrical bottom wall '72 and at its outer end by oppositely extending annular lips '7373 Pipe-engaging elements. designated generally by the nuineral 74, are mounted in recess 7l and arc operable in response to angular movement of the mandrel to apply torsional force to the casing.
- This form of the gripping elements 74 is described in detail in my US. lat. No. 3,322,006, issued May 3i), l967, :ind constitute casinggripping means which are nonthrcadedly engageahlc with thc casing for transmitting rotational torque thereto. While the specific details of these casing-gripping elements do not form a part ofthe present invention in view of thexearlier patent thereon, a brief description will be helpful in connection with the present disclosure.
- a pair of generallysemicircular pipe-gripping shoes 75 which are normally urged apart radially by means of relatively light coil springs 76 seated in suitable sockets 77 in the opposed ends of the shoes, as best seen in FIGS. -12 and 13, the spacing between the inner ends ofthe shoes permitting a limited amount of independent movement of the shoes.
- the upper and lower end edges of the shoes are provided with oppositely extending upper and lower flanges 78-78 which are adapted to engage lips 73-73, whereby the latter will prevent the shoes from being radially expelled from recess 7l.
- Each of the shoes is provided centrally on itsv external surface with a longitudinally extending convex, generally smooth arcuate Y surface portion 79,*which has acircularradius adapted to provide smooth or nongripping engagement with the inner wall of a surrounding pipe, such as well casing C.
- Surface portion 79 extends for a relatively short angular distance about the outer periphery ofthe shoes.
- Oneach side of surface portion 79 the exterior of the shoes is offset slightly'radially inwardly at 80 and these radially. offset portions are provided with a few parallel, longitudinallyextending, radially projecting teeth '81 which are normally out of contact with casing C when portion 79 is engaged with the casing wall.
- the teeth 8l are adapted, upon relative rotation or oscillation between the shoes and casing C, to engage the casing and prevent further relative OPERATION OF THE SYSTEM
- the apparatus may be assembled by any suitable and known procedures. Usually a string of casing C carrying housing l0 on its lower end will be run into conductor casing K and suspended therein from wellhead fitting F on slips G. Bit as- .sembly A will then be lowered through the casing on running tool R (FIG. 2) until seated on pins I8, whereupon a downward jar on latching sleeve will actuate the anchor dogs to lock them into recess 15 (FIG. 3), after which the 'i running tool may be released by upward pull as previously described.
- bottom wall 72 is machined to' provide oppositely radially extending lugs 82, the lugs on opposite sides of recess 7l having openings V8,3 through which a ⁇ cylindrical shaft 84 extends.
- a series of rollers V85 aremounted on'each shaft 84 on opposite sides of the 'lugs 82 and constitute cam followers, the
- Mandrel 60 is adapted to be connected by means of box 61 through a drive nipple 95 to the tubular drive spindle 96 of a fluid-pressureoperated rotary power unit 97 of any wellknown construction.
- a fluid-pressureoperated rotary power unit 97 of any wellknown construction.
- Power unit 97 l is carried on a swivel 98 suspended in a well derrick (not shown) on elevators 99 connected to the conventional drawworks (not shown) of a drilling rig, by means of which thepower unit and the elements connected thereto may be raised and lowered relative to the well as required in the course of operations.
- Swivel 98 is provided with a goose neck 100 through which drilling fluid may be circulated through passages communicating with the bores of spindle 96, nipple 95 and bore 60a of mandrel 60
- Connector assembly B suspended from power unit 97 will now be lowered into the upper endofcasing C until flange 64 rests on the upper end of the casing (FIG. l0).
- Right-hand rotational movement will now be imparted by the power unit to mandrel 60 causing expander 68 to vmove upwardly relative to the mandrel and'setting slips 66 into the wall of casing C (FIGSfl and 1I).
- pipe-gripping'units 74 will slide upwardly on the casing wall for the distance required to accommodate the slip-setting movement of the expander. As slips 66 vare tightly set, however, further rotational force applied to mandrel 60 will produce the relative angular movement operative to rock shoes 75 to positions at which such rotational force will be transmitted as driving torque to the casing.
- hanger slips G may be removed freeing the casing string for rotation by power transmitted from power unit 97 to connector assembly B.
- Fluid circulation is now begun as the drillstring is rotated with the pilot bit section making the hole.
- the flow rcstricv tions formed by the several jet passages through the cutter elel ments will cause the fluid pressure to build up in cylinder 32 above piston 35 forcing the latter downwardly and swinging underreamer cutters 45 outwardly to the positions shown in FIGS. 1 and 3.
- Continued rotation of the drilling string will now be operative to drill a well bore having a diameter to freely and continuously accommodate the 'casing as the drill progresses downwardly.
- the string may againbe suspended and anchored in slips G, whereupon reverse or left-hand rotation of spindle 96 for a few turns will be sufficient to back expander 68 away from slips 66, releasing the latter from their gripping engagement with the casing.
- the connector assembly can now be pulled out of the top of the casing.
- a new section of casing may now be attached to the upper end of the casing hanging in the well head fitting, and connector assembly B inserted in the upper y end of the added casing section, and reactuated by right-hand rotation of the mandrel.
- Hanger slips G may now be removed and drilling continued.
- a fishing tool D (FIGS. 4 and 5) of any well-known design is run through the bore of the vcasing, so that gripping elements E will be caused to latch into recess 27 of the latching sleeve. Thereupon, upward pull applied through the fishing tool will retract latching sleeve 20 to the position shown in FIG. 5, at which dogs-14 will be released for retraction from anchor recess l5.
- FIGS. 14 to 16 illustrate a modification of the bit assembly portion of the drilling system heretofore described. the other parts of the systembeing unchanged.
- a tubular housing 110 is secured to the lower end of casing C and is provided with an anchor recess 115 in the bore wall thereof. Stop pins 118 are mounted in the housing below recess 115.
- the bit assembly includes the tubular cage 112 having radial windows 113 for the reception of anchor dogs 114. Guide slots 116 for cooperation with stop pins 118 are provided in the exterior of cage 1'12 below windows 113.
- Cage 112 is made unitary with underreamer body 137 and is provided with a central bore a portion of which forms the cylinder 132 in which is slidably mounted the piston 135 connected to a hollow piston rod 136 which extends slidably through an opening 130 into a hollow box 138 into which is screwed the shank of a rotary pilot bit 140.
- a latching sleeve 120 carrying external enlargements 121 is slidably disposed in the bore of cage 112 for axial movement between an upper position (FIG. 14) releasing dogs 114 and a lower position (FIG. l5) at which dogs 114 are held in projected anchoring position in recess 115.
- Latching sleeve 120 is provided with an internal latching groove 127 having the same function as groove 27 of the previously described embodiment.
- Elongate hanger bolts 150 having heads 151 extending slidably through perforate ears 152 carried by the lower end of sleeve and are secured to piston 135.
- Underreamer body 137 is provided with angularly spaced longitudinal slots 146 for receiving underreamer cutters 145 which are mounted on shafts 145a terminating in heads 147 mounted for pivotal movement on pivot pins 148 which extend transversely of slots 146 (FIG. 17).
- Heads 147 are formed with angularly extending lever arms 149 which extend past the exterior of piston rod 136 and carry crank pins 160 receivable in cam slots 161 formed in the adjacent face of piston rod 136.
- gage cutters 41 have been dispensed with, as a pilot bit 140 is employed dimensioned to cut a bore to the gage of body 137. It'will be understood, however, that radial gage cutters may be incorporated in the bit assembly as in the previously described embodiment.
- a system for rotary drilling of wells using casing as the drill string comprising:
- latch means releasably securing said bit assembly to the lower end ofthe casing for rotation thereby;
- drive connection means operatively associated with said string of easing and adapted to be connected to a rotary drive power source and releasably insertable into the upper end of the bore of the casing having casing-gripping means nonthreadedly engageable with the casing bore wall for transmitting rotational torque from said source to the casing.
- bit assembly includes: means actuated by fluid pressure applied through the casing for expanding said cutter elements.
- bit assembly includes:
- pivot means pivotally connecting said cutter elements to said body
- piston means slidable in said cylinder in response to fluid pressure in said casing
- lever means drivingly connecting said piston means to said cutter elements for extending and retracting the same.
- lever means comprises toothed rack-and-gear means.
- lever means ⁇ comprises crank-and-pin connection means.
- bit assembly includes:
- a tubular housing coaxially connectable to thc lower end of said casing and having an annular latching recess interiorly thereof;
- said drive con nection means includes:
- a tubular mandrel adapted to be connected to a rotary drive power source
- arcuate shoe elements rockably disposed about said mandrel and carrying vertically extending teeth movable into and out of torsion-applying engagement with said casing in response to relative angular movement between the mandrel and the shoes.
- said drive connection means includes:
- a tubular mandrel adapted to be connected to a rotary drive power source
- stop means on the mandrel engageable with the upper end of the casing to limit inward movement of the man drel'
- expander means mounted on the mandrel for axial move ment into and out of wedging engagement with said slips in response to rotation of said mandrel;
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US77850968A | 1968-11-25 | 1968-11-25 |
Publications (1)
Publication Number | Publication Date |
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US3552507A true US3552507A (en) | 1971-01-05 |
Family
ID=25113586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US778509A Expired - Lifetime US3552507A (en) | 1968-11-25 | 1968-11-25 | System for rotary drilling of wells using casing as the drill string |
Country Status (4)
Country | Link |
---|---|
US (1) | US3552507A (ru) |
JP (1) | JPS5037601B1 (ru) |
CA (1) | CA943124A (ru) |
GB (1) | GB1266617A (ru) |
Cited By (64)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3623558A (en) * | 1970-09-08 | 1971-11-30 | Cicero C Brown | Power swivel for use with concentric pipe strings |
DE2824441A1 (de) * | 1977-06-06 | 1978-12-14 | Tokyo Keiki Kk | Erdbohrer |
EP0353168A1 (fr) * | 1988-07-28 | 1990-01-31 | Cogema | Procédé et dispositif de forage pour l'étude et l'exploitation du sous-sol |
US5456326A (en) * | 1994-04-18 | 1995-10-10 | Exxon Production Research Company | Apparatus and method for installing open-ended tubular members axially into the earth |
WO2000019058A1 (en) * | 1998-09-25 | 2000-04-06 | Weatherford Lamb | An apparatus for facilitating the connection of tubulars using a top drive |
US20020189863A1 (en) * | 1999-12-22 | 2002-12-19 | Mike Wardley | Drilling bit for drilling while running casing |
US20030141111A1 (en) * | 2000-08-01 | 2003-07-31 | Giancarlo Pia | Drilling method |
US20030164251A1 (en) * | 2000-04-28 | 2003-09-04 | Tulloch Rory Mccrae | Expandable apparatus for drift and reaming borehole |
US20030173073A1 (en) * | 2000-04-17 | 2003-09-18 | Weatherford/Lamb, Inc. | Top drive casing system |
US20030217865A1 (en) * | 2002-03-16 | 2003-11-27 | Simpson Neil Andrew Abercrombie | Bore lining and drilling |
US20040011531A1 (en) * | 1998-12-24 | 2004-01-22 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
US6705413B1 (en) | 1999-02-23 | 2004-03-16 | Tesco Corporation | Drilling with casing |
US20040069500A1 (en) * | 2001-05-17 | 2004-04-15 | Haugen David M. | Apparatus and methods for tubular makeup interlock |
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Also Published As
Publication number | Publication date |
---|---|
CA943124A (en) | 1974-03-05 |
JPS5037601B1 (ru) | 1975-12-03 |
GB1266617A (ru) | 1972-03-15 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: HUGHES TOOL COMPANY A CORP. OF DE Free format text: MERGER;ASSIGNOR:BROWN OIL TOOLS, INC. A TX CORP.;REEL/FRAME:003967/0348 Effective date: 19811214 |