Патент USA US2122863код для вставки
July 5, 1938. ‘ J. H. HOWARD El‘ AL 2,122,863 REAMER Filed April 15, 1936 M 2 ShQets-Sheet l w . mg? Aa 6 53 1. 6m A40, A .5 a a .Aéwrf/ Ow. 5m ZS w aJWW» a w ‘ July 5, 1933- J. H. HOWARD El" AL ~ ‘ 2,122,863 REAMER Filed April 13, 1936 @‘6 2 Sheets-Sheet 2 A3 3 /,¢;, '2; a6 6' /5 /0 /5 ‘ 5/ / 5/ .Znrew fore Patented July‘s, 193s ' 2,122,863 UNITED T'STATES PATENT- OFFiCEZ REAMEE John H. Howard, Huntington’ Park, and Alfred G. Catland, Alhambra, Calif; said Oatland as signor to Globe Oil Tools Company, Los Nietos, OaiiL, a corporation of California Application April 13, 1936, Serial No. ‘74,186 10 Claim. (Cl. 255-73) This invention relates to a well drilling tool and relates more particularly to a well reamer. Fig. l is a side elevation of the improved tool provided by this invention. Fig. 2 is an enlarged A general object of the invention is to provide a ' longitudinal detailed sectional view of the reamer practical, eifective well reamer for reaming or portion of the tool, being a view taken substan enlarging a pilot bore and for forming a smooth tially as indicated by line 2-2 on Fig. 5. Fig. regular seat on the wall of the well to receive 3 is an enlarged transverse detailed sectional the packer of a formation tester, or the like. view taken as indicated by line 3-3 on Fig. 1. Many formation testers or well testers embody Fig. 4 is an enlarged transverse detailed sectional a packer designed to seal with an inclined view taken as indicated by line 4-4 on Fig; 1. 10 shoulder of earth formation in the well. Here Figs. 5 and 6 are transverse detailed sectional tofore it has been the general practice to employ views taken as indicated by lines 5--5and 6-6, a drag or scrape type tool to form the inclined respectively, on Fig.‘ 2, and Fig. 7 is an enlarged shoulder in a well to receive the packer of a . fragmentary detailed sectional view taken as in tester. Drag type or scrape type drilling tools are dicatedby’line 1-4 on Fig. 2. 15 not capable of forming a smooth regular shoul The well tool'provided by this invention inder for engagement by a packer. . cludes, generally, a shank lo, a bit II on the Another object of this invention is to provide lower end of the shank, removable inclined pins a. well tool of the reamer type embodying roller l2 and i2“ on the shank I0 above the bit ll, cutters positioned and mounted to form a smooth means [3 locking the pins I2 and i2a in place, 20 regular inclined shoulder on the wall of the well and roller cutters A and B rotatable on the pins for properly receiving the packer of a well tester I2‘ and i2“ respectively. or the like. The shank i0 is the mandrel or body of the Another object of this invention is to provide tool and is adapted to be secured to the lower a well reamer embodying roller' cutters and that end of a well drilling string. The shank ID is 25 is operable to enlarge a rat-hole or pilot bore to an elongate member and is provided at its upper the desired full gauge. ‘ ' end with means for connecting with the drilling Another object of this invention is to provide string. In the case illustrated in the drawings a well drilling tool embodying a pilot bit oper a tapered screw threaded pin I4 is provided on able to guide the tool in a previously formed pilot the upper end of the shank Ill for connecting the 30 bore or to drill a pilot bore and that embodies shank with the drilling string. The shank Ill reaming roller cutters rotatable about inclined is provided with a downwardly and inwardly axes operable to enlarge the pilot bore to the de tapered portion IS. The tapered portion I 5 is sired gauge. spaced some distance above the lower end of the ‘Another object of this invention is to provide shank ‘ l 0. An annular rim or ?ange I6 is provided as novel and particularly effective means for rotat at the upper end of the portion i5 and a similar ably supporting the roller cutters of a well ?ange ll of less diameter is provided at the lower endof the portion IS. The lower portion of reamer. Another object of this’ invention is to provide the shank l0 below the ?ange i1 is reduced in a well reamer embodying a simple one diameter diameter and may be graduated in diameter. as 40 pin rotatably supporting the roller cutters and a illustrated. A central longitudinal ?uid passage simple dependable means for locking the pin 9 extends longitudinally through the shank Ill against movement and displacement. ' Another object of this invention is to provide a well reamer of the character mentioned in which 45 the cutter carrying pins are supported at their ends and at points between their ends. A further object of this invention is to provide a well reamer that is very simple and inexpensive '50 I. 10 1' 20 25 30 35 40 from one end to the other. and that is easy to recondition after use. In accordance with‘ the invention the shank I0 is shaped or formed to carry the pins i2 and i2.1 and the cutters A ‘and ‘B. Circumferentially 45 spaced sets or series of recesses-i8 and is are provided in the tapered portion iii of the shank i0. In the preferred construction there are three equally spaced series of recesses. ‘At least one The various objects and features of our in vention will be fully understood from the follow ing detailed description of a typical preferred form and application of the invention, through out which description reference is made to the and at least one of the series has three vertically spaced recesses iii. In the preferred form of the invention illustrated in the drawings there are two vertically spaced recesses iii in two of the 55 accompanying drawings, in which: of the series has two vertically spaced recesses I8 50. ' series and three vertically spaced recesses iii in 55 v 2 2,122,868 the third series or recesses. The¥upper ends of Sockets 29 are provided in the shank ?ange II at the uppermost recesses I8 and I9 occur at the the lower ends of the lowermost recesses I8. The ?ange I6. The lower ends of the lowermost re- . longitudinal axes of the sockets 29 are inclined downwardly and inwardly and the lower ends of cesses I8 and I9'occur at the ?ange II‘. The re cesses I8 are of the same length and adjacent ‘the sockets 29 are closed. Openings 39 extend recesses I8 are separated by partitions .or webs through the ?ange I6 at the upper ends of the 29. The webs 29 are integral parts‘oi the shank uppermost recesses I8. The openings 39 are in l9. The recesses I9 0! the third series of recesses clined downwardly and inwardly and are longi may be of substantially the same size and are tudinally aligned with the sockets 29. Partially 10 separated or spaced by integral webs 2I of the cylindrical ‘grooves 3I are provided in the webs shank I9. In accordance with the invention the 29. The axes of curvature of the walls of the 'inner walls of the recesses I8 and I9 are inclined grooves 3| are coincident with the axes of the downwardly. and inwardly relative to the longi sockets 29 and openings 39. The pins I2 are ..tudinal.axis of the shank I9. Portions of the passed ‘downwardly through the openings 39 to 15 walls of the lowermost recesses I8 and I9 may be have their lower end portions received in the 15 substantially vertical. In the preferred construc sockets 29. The-bottoms oi the sockets 29 may tion the inner walls of the other recesses I8 and limit'the downward movement of the pins I2. I9 are curved about downwardly and inwardly The pins I2 bear in or cooperate with the grooves inclined axes oi! curvature. The upper and lower 3I and are thus supported against inward pres— ' 20 walls of the recesses I8 and I9 are?at and may Y sures between their ends. The upper ends of the 20 be normal to the axes of curvature of the pins I2 are preferably within the openings 39. inner walls of the recesses. The recesses I8 and A socket 32 is provided in the ?ange II at the I9 are related so that the middle or intermediate lower end of the lower recess I8. The socket 32 recess I9 lies in a horizontal plane or zone over-. 25 lapping the adjacent end portions of the upper _ and lower recesses I8. Ports 8 are provided in so the shank I9 to conduct the circulation ?uid from the passage 9 to the recesses I8 and I9. There’ may be a port 8 communicating with each recess I8 and I9 to assure the proper ?ushing of the cutters A and B. If desired the ?uid passage 9 may be of downwardly diminishing diameter as illustrated in Fig. 2. - The bit I I may be employed to drill a pilot bore 35 in advance of the reaming cutters A and B or may be employed to operate in a previously formed pilot bore to guide the tool. In accordance with the broader aspects of the invention the bit ll may be varied considerably in character and may 40 be secured to the shank I9 in any suitable man ner. The particular bit II ‘illustrated in the drawings is a drag type or scrape type bit com prising a stem 22 and cutting blades 23 project ing from the lower end of the stem 22. In the drawings we have shown the bit I I secured to the shank I9 by a practical e?ective bayonet type connection, it being understood that the bit II may be threaded to the shank if desired. In the structure illustrated in the drawings a longi tudinal socket 24 is provided in the stem 22 to receive the reduced lower portion I9“ of the L-shaped slots or bayonet slots 25 are - shank I9. provided in the stem 22 to receive lugs 26 on the shank portion I9“. The lugs 26 are adapted to 55 cooperate with the lateral portions of the bayonet slots 25 to connect the bit II to the shank I9. Keys 21 are inserted in the longitudinal or verti cal portions of the slots 25 behind the lugs 26 to lock the lugs in the lateral portions of the slots. ‘Screws 28 are threaded in the shank to hold the keys 2'I'against upward displacement. The bit II has one or more ?uid discharge ports (not shown) for discharging the circulation ?uid de-' livered to the bit by the ?uid passage 9. The pins I2 and I2a are provided to rotatably carry the cutters A and ,B and are removably se cured to the shank I9 to extend through the series of recesses I8 and I9. There is a pin I2 extending through each series or set of recesses 70 I8 and a pin I2‘ extending through the series of recesses I9. The pins I2 and I2‘1 are plain cylin drical members of the desired diameter. In ac cordance with the invention the cutter carrying pins I2 are inclined downwardly and inwardly relative to the longitudinal axis of the shank I9. Yrs is inclined downwardly and inwardly relative to the longitudinal axis of the shank. An opening 25 33 is provided in the flange I6 at the upper end of the upper recess I9. The opening 33 is in clined downwardly and inwardly and is in longi tudinal alignment with the socket 32. Partially cylindrical grooves 34 are provided in the webs 2 I. 30 The axes of curvature of the walls or grooves 34 are coincident with the axis of the socket 32 and the opening 33. The pin I2“ is passed down wardly through the opening 33 to have its lower portion received in the socket 32. The upper 35 end of the pin I2“ is preferably within the open ing 33. The pin I2a extending through the re cesses I9, cooperates with the grooves 34 to be supported against inward thrusts at spaced points between its ends. It will be observed that the pins I2 and I2“ arranged as just described are held against movement in all directions except about their own axes and upward movement. The means I3 operates to lock or hold the pins I2 and I2a against upward movement and against 45 turning about their axes whereby the pins are held against displacement from the shank I9. The pin retaining means I3 includes a block 36 secured to each web 29. The webs 29 each have a ?at sided key 3‘I and a ?at walled slot or groove 38 is provided in the inner side of each block 36 to receive a key 3‘I. The cooperation of the keys 3‘I and the grooves 38 holds the blocks 36 against lateral movement. A ?at walled slot 39 is pro vided in the inner side of each block 36 to co .55 operate with a pin I2. In accordance with the invention the pins I 2 each have a ?at walled notch 49 for cooperating with a slot 39. The coopera tion of the walls of the'slots 39 and the notches 49 holds‘ the pins I2 against rotation. The upper and lower ends of the blocks 36 cooperate with the end walls of the notches 49 to hold the pins I2 against longitudinal movement, It is to be understood that the lower ends of the pins I2 may cooperate with the bottom walls of the sockets 39 to prevent downward movement of the pins. Means is provided for removably securing the blocks 36 to the shank I9. Screws M are passed through openings 42 in the blocks 36 and are threaded into openings 43 in the webs 29 and 79 the adjacent parts of the shank I9. In practice the screws 4I may be socket headed and their heads may be received in the enlarged outer por tions of the openings 42. The heads oi.’ the screws 4| may be peened over in the openings 42 25 9,129,868 ‘ 3 to hold the pins against displacement. It is be lieved that it will be apparent how the coopera tion 01’ the slots 38 in the blocks II with the pin notches 40 effectively and dependably holds. the pins against movement and displacement. ters B. The thrust washers 85 in the upper end of the uppermost cutter B has nonrotatable cooperation with a ?at walled notch 86 in the The pin retaining means l3 includes blocks 44 secured to the webs 2i. Flat sided keys 4' are provided on the webs 2i and cooperate with grooves 46 in the blocks 44 to hold the blocks 10 against lateral shifting. In accordance with the invention ?at walled slots 41 are provided in the blocks 44 and ?at walled notches 48 are provided in the pin i2‘ to cooperate‘with the slots 41. The engagement of the walls of the slots 41 and most cutter B is held against turning by its cooperation with a ?at walled notch 61 in the 15 notches 48 holds the pin I2‘ against rotational movement. The ends of the blocks 44 are adapt ed to cooperate with the end walls of the notches 48 to hold the pin l2! against longitudinal move ment. Suitable means is provided for removably securing the blocks 44 to the webs 2 I. In the par ticular case illustrated screws . 48 are passed through openings 50 in the blocks 2| and thread into openings 5| in the webs 2| and the adjacent 35 70 75 thrust washer 65 at the lower end of the lower bottom wall of the recess is. The thrust wash ers 8i spacing the ends of the cutters B from the webs 2| ,and the blocks 44 are partially re 10. ceived in ?at walled notches B8 in the blocks 44. The ?at sided washers 85 seated in the ?at walled notches 68 are held against turning on the pin l2. In operation, the tool provided by the pres ent invention may be employed to form or ?nish an inclined shoulder of earth formation at the upper end or a rat-hole or pilot bore. When used for this purpose the bit ll enters the pilot bore to guide and steady the tool. The cutters A and B are adapted to engage the formation at the upper end of the pilot bore to cut or provide a smooth regular inclined shoulder. The parts of the shank iii. The screws 49 may be 1, cutters A and B are related so that no ‘ridges The heads of the screws or grooves are formed on the shoulder. The 49 may be received in the enlarged outer ends of intermediate cutter B operates in a horizontal the openings 50. The heads of the screws 49 may or circumferential plane which overlaps the ad be peened over in the openings 50 to prevent loss jacent end portions of the cutters A. The plu or unthreading of the screws 49. The blocks 44 rality of roller cutters independently rotatable cooperate with the pin l2a to prevent rotational about inclined axes are particularly e?ective in forming a smooth regular shoulder in the well. and longitudinal shifting of the pin and to main tain the pin in bearing cooperation with the The tool may be employed to- ream or enlarge a'previously formed pilot‘ bore. When used for grooves 34. ‘ The roller cutters A are rotatable on the pins this purpose the bit ll enters the pilot bore in l2 to project from the mouths of the recesses I 8 advance of the‘cutters .A and B to guide and while the roller cutters B are rotatable on the pin steady the tool. The cutters A and B act on I2“l in the recesses IS. The cutters A and B are the earth formation at the upper end of the in the nature of substantially cylindrical roller pilot bore and as the tool is rotated and fed cutters. The upper portions of the uppermost downwardly they operate to enlarge the bore. cutters A and B ‘may be tapered. The lower end The cutters A and B are spaced and positioned portions of the lower cutters A and B may be to be particularly rapid and efficient in their cutting action. If desired, the tool may be em tapered as illustrated in the drawings. The cut ters A and B have suitable clearance with the ployed as a drilling tool, in which case the bit walls of their respective recesses l8 and i9 and Ii operates to form a pilot bore in advance of ‘the cutters A and B. As the bit N forms the project from the mouths of the recesses to co operate with the earth formation. The cutters pilot bore the cutters A and B operating above A and B have suitable teeth or cutting parts. In the bit enlarge the pilot bore to the desired the particular form of the invention illustrated diameter. The cutters A and B are effectively and de the cutting teeth of the cutters B are spiralled in a left hand direction and the cutting teeth of the pendably supported for rotation about their in cutters A in one series of recesses l8 are spiralled dividual axes. The cutter supporting pins 12 in a right hand direction. The cutting teeth of ' and l2a are simple cylindrical parts whose op the cutters A in the other series of recesses i8 posite end portions are directly carried in open are straight or axial. This relationship of the ings in the shank Ill. The pins l2 and I2‘3 are supported intermediate their ends against the cutting parts of the cutters A and B is best illus operating thrusts. The webs 20 and 2| serve to trated in Fig. 1 of the drawings. Thrust washers 60 are provided on the pins .brace and support the intermediate portions of l2 at the opposite ends‘ of the cutters A. The the pins l2 and I23 respectively. As described washers‘ 6|! are polygonal or ?at sided. The above. the slotted blocks 36 and 44 cooperate washers 60 at the upper ends of the uppermost with the pins l2 and i2u at the webs 20 and II cutters A cooperate with ?at walled notches 6! to dependably lock the pins against movement. in the upper walls of the upper recesses I8. The The blocks 36 and 44 are simple inexpensive cooperation of the washers 60 with the notches parts and are easily secured to the shank. The blocks may be readily removed from the shank 6i prevents turning of the washers. The wash ers 60 at the lower ends of the lower cutters A III to permit the removal of the pins I2 and i2a when it is desired to replace the cutters. cooperate with ?at walled notches 62 in the bot Having described only a typical preferred form tom walls of the lower recesses l8. The ?at sided washers 60 ?tting the'?at walled notches and application of our invention, we do not wish 62 are held against turning. The washers 60 to. be limited or restricted to the speci?c details which space the ends of the cutters A from the herein set forth, but wish to reserve to our webs 20>cooperate with ?at walled notches 63 selves any variations or modi?cations that may in the blocks 36. The notches 63 receiving the appear to those skilled in the art or fall within flat sided washers 60 holdthe washers against the scope of the following claims: Having described our invention, we claim: turning. Thrust washers 65 are provided on the 1. A well tool comprising. a shank having re 76 pin l2a at the opposite ends of the several cut 25 socket headed screws. 30 upper wall of the uppermost recess I8. ‘ The 4 2,122,868 cesses, a socket at an end of one recess and an opening at an end of another recess, a web on the shank between the recesses, a pin extend ing through the recesses, cooperating with the web, having one end portion carried in the socket and having its other end portion carried in the opening, and a part on the web cooper ' ating with the pin to hold the pin against lon gitudinal movement, and cutters‘ in the recesses 10 rotatably supported by the pin. 2. A well tool including, a shank having a series of aligned spaced recesses, and openings at the opposite ends of said series, a pin extending through the recesses and having its portions car 15 ried in said openings, a part secured to the por tion of the shank between the recesses to hold the pin against turning movement, and cutters on the pin rotatable in the recesses. 3. A well tool including, a shank having a series of recesses and an opening at each end of said series, a part on the shank between the recesses, a removable pin extending through the recesses and having its end portions supported in the openings and supported between its ends by said part, means on said part holding the pin against turning and moving longitudinally, and cutters in the recesses rotatably supported by the pin. 4. A well tool including, a shank having a series of recesses and an opening at each end of said series, a part on the shank between the re cesses, a removable pin extending through the recesses and having its end portions supported in the openings and supported between its ends by said part, means on said part holding the pin 35 against longitudinal movement, and cutters in the recesses rotatably supported by the pin, said said part. the pin having a notch, a member at tached to said part and cooperating with the notch to hold the pin against movement, and cutters rotatably carried by the pin to project from the recesses. - 7. A well reamer comprising, a shank having a series of recesses, an opening at one end of the series and a socket at the other end of the series, a part on the shank between the recesses,.a pin extending through the recesses'having one end portion carried in the opening, having its other end. portion carried in the socket and bearing against said part, the pin having a notch, a mem ber removably, secured to said part and coop erating with the notch to lock the pin in posi 15 tion, and roller cutters rotatable on the pin and projecting from the recesses. 8. A well reamer including, a shank, three cir- ' cumferentially spaced pins on the shank in clined downwardly and inwardly relative to the 20 longitudinal axis of the shank, three roller cut ters on one of the pins, and two roller cutters on each of the other pins of greater length than the ?rst mentioned cutters, the cutters on the said pins being related to overlap in their engagement with the formation. 9. A well reamer comprising, a shank having a series of vertically spaced recesses, a socket at the, lower end of said series and an opening at the upper end of said series, said socket and open ing being inclined downwardly and inwardly relative to the longitudinal axis of the shank, a pin extending through the recesses and having one end carried in the socket and one end car ried in the opening, a member secured to the 35 shank between the recesses and cooperating with means including a block secured to said part and cooperating with the pin. the pin to hold it against longitudinal movement, 5. A well tool including, a shank having a series of recesses and an opening at each end of said pm. series, a part on the shank between the recesses, a removable pin extending through the recesses and having its end portions supported in the circumferentially spaced series of vertically openings and supported between its ends by said part, a substantially ?at surface on the pin, a member secured to said part and cooperating with the surface to hold the pin against move ment, and cutters rotatably carried by the pin and roller cutters in the recesses rotatable on the ' : 10. A well tool comprising, a shank having 40 spaced recesses, sockets at the lower ends of said series, and openings at the upper ends of said series, the sockets and openings being inclined downwardly and inwardly relative to the longi 45 tudinal axis of the shank, pins passing through the recesses and bearing on the portions of the shank between adjacent recesses, and having to project from the recesses. 6. A well tool including, a shank having a series of recesses and an opening at each end of their ends carried in the sockets and openings, blocks secured to said portions of the shank and said series, a part on the shank between the re ters in the recesses rotatable on'the pins. cesses, a removable pin extending through the recesses and having its end portions supported in the openings and supported between its ends by holding the pins against turning, and roller cut JOHN H. HOWARD. ALFRED C. CATLAND. 50'