Патент USA US2109031код для вставки
Feb. 22, 1938. J. C. O’ NEAL 2,109,031 ‘ FULL HOLE CASING OR TUBING HEAD Filed July 16, 1936 \\' 5 Sheets-Sheet l ‘ Feb. 22, 1938. J. c. o' NEAL 7 2,109,031 FULL HOLE CASING OR TUBING HEAD Fiiled July 16, 1936 a Sheets-Sheet 2 / ,26 48 _ - .n I James QO'Neai 3mm vfmhbw FebZZ, 1938. J. c. O’NEAL ' - FULL HOLE CASING OR TUBING HEAD Filed July 16, 1936 —- ‘ 2,109,031 . , 3 Sheets-Sheet 3 2 . - 31w I - ?m M/dm Gum/M44347 ' Patented Feb. 22, 1938 ‘ 2,109,031 UNITED STATES PATENT OFFICE 2,109,031 FULL HOLE CASING 0R TUBING HEAD James Conn O’Neal, Beaumont, Tex., assignor to Gulf Coast Machine & Supply Company, a cor poration Application July 16, 1936, Serial No. 90,831 13 Claims. My invention relates to a well head construc- (01. 285—22) Fig. 3 is a broken sectional detail illustrating‘ tion to be used on casing or on tubing as the case may be. It is an object of the invention to provide a 5 head for use on casing or tubing which provides the sealing means employed with the inner pipe. Fig. 4 is a transverse section on the plane 4-4 of Fig. 2. Fig. 5 is a similar transverse section on the 5 a full cylindrical opening therethrough for the performance of drilling and setting operations and which has no obstruction therein to hamper the operation of drilling, setting pipe and the 10 like. plane 5—5 of Fig. 1. Fig. 6 is a broken section on the plane 6—6 of Fig. 5. Fig. '7 is a broken side elevation of the housing for the operating stem. 10 It is a further object, in connection with a Fig. 8 is a broken sectional detail showing the full hole structure of this character, to provide inner face of the operating device in latched posi an adjustable support for the inner concentric tion. casing or tubing which is to be hung in the head. 15 It is an object of the invention to provide a support or hanger for the inner pipe which may normally remain in a retracted position so that the operations of drilling or completing of the well may be performed without interference, but 20 which may be advanced into- position to support the inner pipe whenever desired. It is a further object of the invention to provide a supporting device of this character which is easily and positively operated from retracted 25 to advanced position uniformly and with a minimum of effort. It is a further object of the invention to provide a supporting device of the character stated which will be latched in either operative or inop30 erative position. It is a further object of the invention to provide a head of the character stated upon which other operative devices such as valves and blowout preventers may be mounted, but which may 35 be reduced in diameter when the inner pipe has been hung in position so that further operations may be performed through a pipe of smallerv diameter. 7 I desire to provide a head for the casing which, 40 when an inner Pipe 01‘ Casing has‘ been hung therein, may be dismantled so as not to interfere ‘ Fig. 9 is a similar view showing the latch in open position. 15 While it is understood that my invention may be employed for use upon either a casing or tub ing I have illustrated the same in this invention as applied to a casing l which may be under stood as extending down into the well for the 20 desired distance. Upon this casing is mounted a casing. head 2 constructed in accordance with my invention and having its upper end threaded with a coarse thread on its outer surface at 3 for engagement with .a removable adapter ring 4. 25 Said ring it when mounted upon the casing head forms a ?ange projecting radially from the upper end of the head and is formed with longitudinal openings 5 therethrough to receive bolts 6 by means of which the casing head may be con- 30 nected to an upper ring 1, which serves to clamp upon the casing head an adapter 8 which will be later described. The upper extremity of the casing head 2 is formed to seal with the adapter 8 and has an an- 35 nular ridge 9 thereon to fit within the corre sponding groove at the lower end of the adapter 8 and to compress packing in in said groove, thus forming a sealing contact. There is also a row of removable studs or pins H mounted in the 40 upper end of the head and projecting upwardly With further Opel-‘$110115 Fherein in Connection therefrom in a position spaced slightly from the with the inner Strmg of plpeThe invention lies largely in the particular inner periphery of the head. These studs are for attachment with a subsequent device such as a 45 construction and arrangement of the parts which make up my improved well head, WhlCh structure will be more fully explained 1n connect1on with packing gland or other means as will be later noted on the interior periphery of the casing head thindra'lvgu?iaggnggé 1 is a Side View, partly 50 in elevation and partly in vertical section show~ and at a level about midway between the ends men?“ I_f°rm 3' radlalbi extending groove '2 50 ing a casing head embodying my invention equipped with well control apparatus thereon. Fig.2 is aview similar to Fig. 1‘ but showing the control apparatus removed and an inner string of 55 pipe supported therein. ' within which a set of hanging dogs may normally be housed- As will be Seen Particularly from ref erence to Fig- 5, this groove is deep enough to receive the dogs I3, which are housed therein, said dogs when in normal position having their in- 55 ‘2,109,031 ner faces flush with the inner face of the casing head. The dogs I3 are arcuate in shape and when in retracted position, as shown in Fig. 5, fit closely When the disc 26 is rotated to push the dogs away from the disc and move them into retracted position, as shown in Figs. 5 and 9, the pivotal points at both ends of the operating arms 21 and the disc will be again aligned so that a simi against the inner wall of the groove !2 in which they are housed. The dogs are comparatively lar toggle effect is obtained, tending to hold the short in length and a sufficient number are em dogs in retracted position. ployed to entirely ?ll the groove except for an In the movement of the dogs I provide laterally extending pins 3| on each dog which project upwardly from the upper side of the dogs and 10 operating space or chamber if; at one side of the 10 casing head. Each dog is linked to' the adjacent dog by connecting links i5. 1 Said links are arc'ué move within an undercut groove 32 and limit ate in shape and are ?tted into grooves 56 in the .themovement of the dogs inwardly. These pins ‘3| are wedge shaped with the apex extending outer side of each dog. A ‘pivotal connection with the two dogs adjacent thereto is made by. pins ii extending through the link and the adja inwardly, and are thus formed so that if sand or cent sides of the dogs. the groove in‘ in the dog so as to allow a certain shaped contour of each of the pins will tend to displace the packed sand or other material and allow the dogs to move to supporting position. In amount of articulation between adjacent“dogs' order to further assure the cleaning of the groove > The inner side 'of each link 15 is spaced slightly from the-lower side of . .to ‘permit of- the ?exibility necessary in moving from‘retrac‘ted position, ‘as shown in Fig. ‘5, to the‘advanced p‘ositio‘n shown in Fig‘. 4. As will be noted‘the grooves it in the vdogs do not extend other materialpacks within the groove the wedge 15 or recess IS in the outer faces ofthe dogs and 20 keep‘san‘dj from packing therein I'provide one‘ or more openings 33 in the vgroove i2 in the casing head, these openings being normally closed by entirely across the two dogs _ l3a and 53b adja threaded plugs 34 which-may be ‘removed to pro ‘cent‘th‘e operating vmechanism. The groove is vide attachment for a grease gun or other simi 25 lar device through which ?uid may be caused beveled outwardly and the end‘of the dog is rounded off to ?t within the space provided. A chamber M is formed at one side of the cas ing head within the ‘channel of the groove I2. ‘ At that point the casing head ‘is provided with an outwardly extendingv boss l1 and a threaded opening I8 is formed at that point. ‘Within this threaded opening is ?tted a sleeve I9, which acts ‘as a support for an operating ‘stem '20, which ex tends back axially through the, sleeve. The sleeve vis threaded at its ‘inner end‘ to‘ engage withinp‘the to flow around through the groove and displace the sand or other material. A steam jet may also be used. ‘ ‘ ' , In the rotation of the stem 26, I provide a lat erally extending arm 35 which may be screwed diametrically through the stem. The ring or col lar 36 ?tting about the stem-furnishes a bearing for the outer end thereof within the sleeve. The arm 35 extends through a slot 31 shown in Figs. 1 and 6, formed in the outer end of the sleeve l9. opening ‘l8 and is‘ also Qthreaded at its outer end Said slot extends about 180,“ around‘the sleeve ‘at 2| to engage with‘a cap '22 as shown in Fig. 2. and at each ‘end of said ‘slot is formed an in wardly tapered opening 38, which forms a recess to receive a tapered latch member '38 formed ,The outer end of the sleeve is unobstructed but on the inner ‘ends thereof the sleeve is closed exceptfor an opening through which the operat ing" Stein 2!!‘ may pass. A st‘ufiingbox is formed within the‘sle‘eve about the stem 28, as shown at 23, to form a seal about the stem but ‘permitting its rotationasv will be later noted. The inner ‘en‘dof the stem has a radial ?ange 24 thereon. Extending inwardly from the ?ange 24 is a squared head 25. ' ' ‘ The squared head ?ts within an operating disc 50 26 the construction of which maybe seen in Figs. 8 and 9.‘ Said ‘disc ?ts slidably upon'the end ‘of vthe operating stem but is rotated through the 30'. upon the arm 35. As will be seen from Fig. 5, the latch 39 ?ts slidably over. the armi35 and has a sleeve 40, which acts as a housing around the arm 35 for a spring 4! which ?ts between the ‘head 42 upon the arm 35 and the ‘latch member 45 39. It will be seen that when this arm 35 is to be operated the operator will grasp the sleeve '40 and pull it radially outward to release the latch 39 from the recess ‘38. The'arm may then berswung, around in the slot 31 to the other end of its movement where the spring will force the latch 39' into the recess 38 in the opposite rotation of the stem, as will be obvious. vAl position of the supporting member. ‘thou'gh this‘slidable connection is shown as‘in With reference again to'Figs. 1 and 2, during cluding a squared end for the disc, obviously a the drilling of the well through the casing head 55 , keyed connection could be used. 'I‘he'operating and the casing there will normally be above the disc has at two points thereon an attachment for 1casing head ‘control equipment for the control operating arms 21. Said arms are connected to the disc by ‘means of screws 28, which allows‘the pivoting of the arms 21 thereon. The opposite end‘of each arm 21 is connected by means of [the link 26 with the end of the adjacent dog 13a or l3b. This link forms a pivotal and ?exible connection between the arms 2'! and the dogs which is designed so as to allow a certain amount ; of the well under pressure. It is often found that when the drill passes through formation contain ing gas that danger-of blowout is present at all 60 times and the drilling is performed with appara tus at the well head ready to close in thewell in case a blowout is imminent. In my device is provided an adapter 8,v previously noted, for at tachment to the upper end of the casing head. of play during the operation of the device. ‘This adapter is employed to connect the casing As will be seen from Figs. 8 and 9, the arms 21 are arranged so thatwhen the dogs are to be blowout preventer or similar equipment‘ ‘which head with the ‘lower end 43. of‘a master valve or ‘drawn together in supporting position the links may ‘be placed atv the‘ upper 1 end of "the casing will inter?t. When this is done the pivotal con head. ‘The lower end of the adapter 8 is recessed nection 3070f the‘link 294with the doglwill be on its inner side to provide vspace for the up-' aligned ,withthe pins 28 on the dogs so ‘that a toggle eifect‘isrobtained which tends‘to hold the dogs in position so that ‘they cannot‘be. moved apart. This‘will ‘be understood ‘from Fig. 8. wardly projecting studs or bolts 1 I. This recess 'thusprovided‘ is closed on its inner face by a sleeve“, which ?ts at its upper end against a shoulder 45 on the interion-of'the adapter and 2,109,031 at its lower end rests upon the upper end of the casing head. It will be seen that when the adapter is clamped tightly against the casing head the sleeve 44 will be held rigidly in position closing the interior of the adapter and forming a smooth and full opening downwardly through the adapter and casing head. On the lower end of the adapter is a short out wardly extending ?ange 46 which provides an uppe shoulder to engage with the ring ‘I previ ously noted. This ring will have spaced open ings to receive the bolts 8 by means of which the ring may be bolted to the ?ange 4 of the casing head. When the nuts have not been clamped 15 tightly to engage the adapter with the casing head it will be seen that the ring or ?ange ‘l on the adapter may be rotated with the ring 4 on the casing head to allow the ring 4 to be screwed on or off the head as desired. When the nuts are tightened upon the bolt 6 the adapter and the casing head will be clamped rigidly together as is common in ?anged connections thus forming a seal. At the upper end of the adapter 8 is a ?anged connection 41 or any preferred alterna 25 tive type of construction which needs no speci?c description. ' 3 and threaded at approximately the correct posi tion for hanging. The coupling is placed thereon together with the sealing rings 55 and the support therefor. When it is desired to hang the same after casing 48 has been cemented at the bottom the lift nipple'50 is employed to pull upwardly and exert a stretch upon the string of pipe 48 and bring the lower end of the coupling 49 into posi tion above the hanger dogs. The post or stem 20 is then rotated to throw the hanger dogs inwardly 10 into the position shown in Figs. 2 and 4, thus forming a supporting shoulder upon which the coupling may be lowered. When this is done the weight of the inner string upon the pipe will tend to force the ring 54 upwardly into position shown 15 inv Fig. 2, thus compressing the packing rings 55 and forming a seal. When ‘this portion of the hanging is done the arm or pin 50'which oper ates the stem 29 may be unscrewed and pulled outwardly and released from the said stem. A 20 cap such as is shown in Fig. 2 at 22 may then be screwed over the end of the same forming a clo sure around the stern and leaving the pipe prop erly supported on the dogs I3. I then unscrew the threaded ring 4 from the 25 casing head, insert the packing rings 51, and When the condition of the well necessitates the hanging of an inner string of casing or tub place the gland 58 upon the packing rings 5i ing within the casing head, the said inner string said rings 5'! in sealing position. which is shown at 48 in Fig. 2 is lowered down wardly into the well. , The master valve and blow out preventer will be in position to guard against a blowout at any time during this operation. When the inner string is being set, and the 35 length of the pipe to be used is ascertained, the up per end of the string 48 is equipped with a special coupling 49 threaded for engagement with a pull nipple 58 or other connection. The inner string 48 is then ready for setting and may be swung 40 from dogs 13 or from casing elevators while being cemented. Control equipment and adapter 8 may be removed from the head when cement has set or can be removed after well has been com pleted. On its outer side the coupling 49 has a’ 45 radial ?ange 5i above and below which packing may be arranged to form a seal between said coupling and the inner wall of the casing head. At the lower end of the sleeve the outer diameter of the coupling is decreased to form a downwardly presented shoulder 52 and at the lower end of the 50 coupling is threaded exteriorly to attach a ring 58 which forms'a stop member or support for a ring 54 above which the packing rings 55 are mounted. The supporting ring 54 is normally at 55 tached to the outer surface of the coupling by a shear pin 55 shown best in Fig. 3. When in this position the supporting ring 54 rests upon the stop ring 53 and has above it the packing rings 55. The ring 54 is adapted to be moved upwardly to 60 compress the packing rings 55 when the weight of the inner casing string 48 is supported on the ring 54. When this is done the pin 56 is broken or sheared off and the ring is moved upwardly to compress the packing. Above the flange 5| are packing rings 51 upon 65 which may be ?tted a gland 58 whereby said pack ing may be compressed. The gland 58 has a laterally extending ?ange through which the studs or bolts l ! may extend. Upon this ?ange I place 70 a ring 59 also provided with openings to ?t over the studs H and nuts 69 are then employed to compress the gland against the packing so as to form a seal at that point. In setting the inner string, it will be understood 75 that the upper end of string 48 has been cut off and tighten the gland in place so as to hold the I The pull nipple 59 may be unscrewed and a bell nipple or other protecting means may be screwed therein so that drilling or other opera tions may proceed through the inner string 48. If‘ it is desired to set a casing head upon the inner string 48 the attachment may be made within the . upper end of the coupling 49, said casing head being equipped with my improved form of hanger if desired. It will be noted that my hanger is particularly desirable for handling the equipping of wells un 40 der pressure. The upper end of the well may be sealed by means of blowout preventers or other devices, allowing the pipe to be manipulated through said blowout preventer or other devices and through the head in the setting thereof and 45 when it is ready to support the pipe it may be properly supported upon the coupling 49, which is insertable downwardly through the control equipment and head without endangering a blow out. When the coupling 49 is in place the inner 50 string may be stretched and the hanging opera tion performed without di?iculty. I provide a strong and e?icient hanger which normally is out of the way and does not interfere with opera tions in the well but which can be easily advanced 55 to supporting position by the simple rotation of the operating stem. The further advantages of my invention will be obvious to those skilled in . the art. I claim: 1. A well head of the character stated includ ing a tubular body threaded to engage a casing and having a full hole cylindrical interior, means at the upper end thereof for attachment to con trol equipment, an interior annular groove, sup- ' porting dogs housed in said groove, said dogs being linked together, and means operable from the exterior of said body to move said dogs to and from position projecting into said cylindrical interior to form a support for an inner pipe. 70 2. A well head of the character stated includ ing a tubular body threaded to engage a casing and having a full hole cylindrical interior, means at the upper end thereof for attachment to con trol equipment, an interior annular groove, sup 75 2.109.031 porting dogs housed in said groove, said dogs -8. A casing-head ‘having acylindrical passage being linked together, a rotatable stem having a sealing engagement through the Wall of said head and means connecting the inner end of said stem with said dogs whereby the rotation of said stem Will move said dogs inwardly to supporting posi tion or outwardly to a position housed in said .therethrough, an inner groove in said head ex tending horizontally about the passage, a plural ity of dogs normally housed in said groove, said groove. 3. A well head of the character stated includ ing a tubular body threaded to engage a casing and havinga full hole cylindrical interior, means at the upper end thereof for attachment to con trol equipment, an interior annular groove, sup- porting dogs housed in said groove, said dogs 15 being linked-together, a rotatable stem having a sealing engagement through the wall of said head and means connecting the inner end of said stem withsaid dogs whereby the rotation ofv said stem will move saiddogs inwardly to supportingposi tion. or outwardly to a position housed in said groove, and means to latch said stem against rotation. ’ . . , ,. 4. In a well having therein a plurality of con centric strings of pipe, an outer casing,’ a casing :25 cuate dogs normally'housed in said groove, links connecting all but two of said dogs, a disc to which said two dogs are connected, a stem on said disc, and means to ‘rotate said stem and disc to 15 move said dogs ingsaid groove. '10. A casing head having an inner passage, an annular groove in the wall of said passage, arou ate dogs normally housed in said groove, links connecting all but two of said dogs, a disc’to which said two dogs are. connected, a stem on said disc, means to'seal about said stem, a latch on said 7 _ r as said casing, an annular groove on the inner groove, an inner pipe, a coupling at the upper end thereof, a radial ?ange thereon ?tting within said head, packing means below said ?ange, a 3O ring below said packing .means adapted to seat upon said dogs when said dogs .areadvanced in wardly and means to move said dogs positively into and out of said passage to support said. inner pipe operative from the exterior of said head, the 35 Weight of said pipe acting ,to compress said pack ing. , ' Y. 12. A casing, a casing head thereon having a connectjcontrol equipment thereto, a ring having '7 threaded attachmenton the exterior upper end of passage having approximately the same diameter said head to form a-?ange thereon, an upwardly as said casing, an annular groove on the inner 40, presented shoulder adjacent the lower end of said surface of said head, arcuate dogs housed in said adapter, a ring ?ttingabo've said shoulder, bolts, groove, an inner pipe, ac‘oupling at the upper end thereof, a radial flange thereon ?tting Within extending through said rings to .clamp said adapt said head, packing means below said flange, a er to said head, said rings being rotatable simul taneously when screwing said threaded ring on ‘ring below saidv packing means adapted to seat upon said dogs whensaid dogs are advanced in said head. ' 6. A casing head having a cylindrical passage wardly and means to move said dogs positively into and out of said passage to support said inner therethrough, an inner groove in said head ex pipe operativefrom the exterior of said head, the tending horizontally about the passage, a plu rality. of dogs normally housed in said groove, a weight of said pipe acting to compress said pack 50 stem extending through the wall of said head ing, and means above said ?ange to seal between said coupling and said head, said last named into'said groove, a disc-shaped head on said stem, and links pivotally connected to said head and means also acting to resistupward movement of to said dogs to move said dogsinwardly and out 13. A‘ well casing, a casing head thereon. having wardly in said groove as said stem is rotated. .55 '7. A casing head having a cylindrical passage an inner cylindrical passage, an inner pipe, well control equipment above said casing through therethrough, an inner groove in said head ex tending horizontally about the passage,va plural, which-said pipe may be moved vertically, a cou ity of dogs normally housed in said groove, a-stem pling on said pipe, a ?ange on said coupling ?tting extending through the wall of said vheadinto within said casing head, seal rings below said said groove, a disc-shaped head slidably'mounted flange, a sup-portinglring for said seal rings be on saidrstem, and links pivotally connected to low the same, and means operative from the out said head and to said dogs ;to move said dogs side of said casing head adapted‘to be positively inwardly and outwardly in said groove as said moved inwardly or outwardly below said support stem is rotated, the pivotal connections on said ing ring to support or release said pipe when de links being aligned in both inwarda'nd outward sired. positions of said dogs. JAMES CONN O’NEAL. said 65 ' surfaceof said head, arcuate dogs housed in said centric strings of ,pipehanouter casing, ,a casing ,60 ' threaded attachment on the exterior upperend of said head to form a flange thereon, an up head thereon, an adapter on said casing head to 555 stem. 11. A casing, a. casing head thereon having a passage having approximately the same diameter means between the adjacent ends of said head and adapten'and means in said casing head to support an inner string of pipe. 5. In a well having therein a'plurality of con .50 disc will move said dogs. 9. A casing head having an inner passage, an 1O annular groove in the wall of said passage, ar headthereoman adapter on said casing head to connect control equipmentthereto, a ring having wardly presentedshoulder adjacent the lower end of said adapter, a ring ?tting above said shoulder, means connecting said rings together, sealing 45 dogs being linked together to allow limited pivot ing movement between adjacent dogs, an operat ing disc, two of said dogs being operatively con nected with said disc whereby the rotation of said pipe. ' ' . .