Патент USA US2118094код для вставки
May 24, 1_938. J_ M_ MCDO’NOUGH ET AL COMBINATION >CASING HEAD AND CHRISTMAS TREE 2,118,094 2,118,094 Patented May 24, 1938 UNITED STATES -PATENT GFFICIE'.l 2,118,094 COIWBINATION CASING HEAD AND CHRIST MAS TREE . James Moore McDonough, Galveston, and Gran ville A. Humason, Houston, Tex. Application April 12, 1937, Serial No. 136,240 13 Claims. (Cl. 166-15) 'I‘he invention relates to equipment for well ceive a plurality of hangers therein on a common heads and pertains particularly to the construetion of the casing head and the pipe hangers sup ported therein. In equipping the upper end of the well which taper, a single holddown serving to retain the casing head and hangers in a composite unit. I ` Still another object is to provide a casing head within which is provided a plurality of interñt 5 -ting, intersealing hangers connected to concen tric strings of tubing. Other and further objects of the invention will outlet at the upper en'd of the Well which extends up a material distance above the well head and be apparent from the following description taken connect thereon a plurality of branching flow in connection with the drawing in which Fig. 1 lines through which the fluid from the Well may is a vertical section of a well head embodying110W under control. 'I‘his structure of ñow pipes the invention. Fig. 2 is a horizontal section on the line 2-2 connected with the upper end of the well is ordi ' narily called the christmas tree and is intended of Fig. 1. Fig. 3 is a plan 'view showing the casing head to provide a plurality of outlets for the fluid plate which holds the assembly 1n a composite from the. Well, each of which outlets may be con trolled by valves or otherwise. When the well is unit. . ' Fig. 4 is an elevation of the casing head plate flowing under pressure it is diflicult, if not im possible, with the ordinary installation to repair attached to the casing head. the branch lines. When subjected to lateral Fig. 5 is a section on the, line 5-5 of Fig. 1 strain as may be the case in a heavy 'storm some taken in the direction of the arrows. lines are broken or damaged by parts falling Fig. 6 is a vertical section through the shut oii ' >thereon and it becomes a diilìcult problem to valve. bring the well under control., The several strings of casing I, 2, 3 and 4 are It is an object of the invention to provide a supported in concentric‘relation by a series of series of ñow lines in direct connection with the tubing hangers 6, 'l and 8, which are arranged casing head itself thereby enabling the> operator in concentric nesting relation, eachl of said hang to protect the branch lines against damage. ers being connected to an individual string of It is also an object of the invention to provide tubing, The outermost member or casing head a separate outlet for each of the concentric pipe 5 comprises a tapered ring which is threadably 30 strings extending laterally through the casing secured to the casing l. 'I'his casing head may is provided with a plurality of separate concen tric strings of pipe, it is common to provide an 10 15 25 30 head. , A further object of the invention is to provide a well head comprising a casing head and a plu 35 rality of tubing hangers nested therein, the unit having a separate outlet from each of the pipe strings and transversely of the casing head inde pendently of the relative rotational position of the be provided with any suitable ñange or ears, not shown, for attachment to supporting means to assist in supporting the strings attached thereto and to resist other stresses to which the unit may be subjected. The casing head is co-ex casing head and the respective hangers. tensive with the assembly comprising the tubing hangers 6, 1 and 8 and has radial flow lines 9, I0, Il and I2 attached to internally threaded It is also an object of the invention to provide a well head compact construction and which bosses in the casing head walls. The inner wall 40 I5 of the casing head is tapered to receive the therefore extends but a short distance above the surface of the earth or, if desired, may be in tapered surfaces of the respective tubing hang stalled in the cellar whereby damage from ex-> 45 ternal forces is minimized, Another object is to provide a well head having a valve seat in the ñow line and valve means for closure with the seat to positively close the flow line and permit repair on the line from the Well. Another object of the invention is to provide a 50 well head having means adapted to close the ilow line therein or to admit Wire line tools tc the well. A more specific object is to provide a casing 55 head having a deep bowl that is tapered to re ers, while the upper face of the casing head is provided with a plurality of drilled and tapped openings to receive studs i6 which pass through openings in a casing head plate l1 secured in place thereon by nuts I8. The upper end of the casing head5 and the casing head plate l1 are provided with complementary grooves in which is seated a seal ring I9 to form a iluid tight joint 50 between these members. Seated Within the lower end of the casing head is a tubing hanger 6 threadably attached to the tubing string 2 above the internal threads 25. The hanger is provided with a tapered bore 26 55 2 2,118,094 to receive a tapered end portion of the next ad jacent hanger. The outer surface of the hanger is grooved at 21 to provide a peripheral ñuid pas sage which communicates with radial passage 28 in the casing head and with one or more radial passages in the hanger 6. With this construc tion it is apparent t'nat it is unnecessary for pas sages 28 to be in mating relation with the i’iow line I0. In order that the passage from. the annular 10 space between the tubing strings 2 and 3 be sealed from adjacent spaces the hanger is also provided with peripheral grooves above and below, the groove 21 to receive packing rings 29. Above these packing rings- is another peripheral groove 15 30 to receive the ends of set sçrews 3| which pass through the Wall of the casing head 5 and enter the groove to anchor the hanger in place. To insure against leakage through the wall ofy 8. Each of the sections 2| and 22 has a semi circular wall which forms` a portion of opening 49. Extending diametrically from opening 49 each section is reduced in thickness to form ‘ overlapping portions 23, each of which is pro vided with a tongue 24 to engage a complemental groove 25. One of the studs |6 passes through aligned' openings in each of overlapping por tions 24. By means of this construction it is obvious that cover plate |1 `is so constructed 10 that it is possible to install or remove the plate without disturbing the assembly secured to hanger 8 and at the same time without sacrifice of mechanical strength of the assembled unit. It will be apparent that a compact, sturdy assembly has been provided -in which all of the hangers have been enclosed in a single casing head body 5 which has the deep bowl construc the casing head 5 along set screws 3| the thread ' tion with a single tapered face I5 upon which 20 ed opening through the wall is counter-bored to the several hangers are arranged to seat. When 20 receive packing 33, as is best seen in Fig. 2, the cover plate |1 is affixed a solid unitary assem ' which illustrates a like construction on the line bly is effected which is completely enclosed. 2-2 of Fig. 1. The packing 32 is compressed Attached to the threaded end section 41 of within the counter-bore about the set screws 3| the hanger 8 is a gate valve 60 having an up 25 by means of a nut 34 and gland 33, the 'packed ward extension 6|. If it is desired for any reason 25 joint thus serving also to lock the set screw in to close the passage from tubing string 4 to ñow fixed position. line I2 a valve generally designated as _63 is The -hanger 1 is similar to the hanger 6 but is attached to the upper end of the extension 6|. provided with a reduced end section 40 and a This valve comprises a. body'member 64 includ 30 packing ring 4| thereon to effect sealing en ing an upward extension yoke 65 which is inter gagement with the tapered surface 26 of the nally threaded at its upper end to receive a valve hanger 6. Packing rings are also provided on stem 66, to which is fixed a hand Wheel 61. At the peripheral surface of the hangerl above the lower end of the body 64 the valve stem 66 and below a fluid passage groove 42, which passes through an axial bore 68 provided with a 35 (similar to groove 21,in hangerv 6) serves as a passage for ñuid from the annular space be bolted> flange type stumng box having packing 69 held therein by gland 10 adjustably held in tween the tubing strings 3 and 4 through the position by nuts 1| on studs 12 in the body 64. In order for valve member 52 to be self-seat ing inthe valve seat 5| the connection between the valve stem 66 and valve 52 is provided as illus trated in Fig. 6. The valve stem 66 terminates radial passage 43 to the flow line ||. As illus trated in Fig. 2 and as described in connection with the hanger 6, set screws 3| pass through the casing head 5 and into the groove 3l) to hold the hanger in position within the casing head. 'I'he hanger 1 extends to the top of the casing head 5 and presents a conical cavity at its upper 45 end to receive hanger 8 attached to the tubing string 4.- The upper end of the hanger 8 is re duced to provide a shoulder 45 contacting a com plementary surface on lthe casing head plate |1 whereby hanger 8 is held in place and the assem 50 bly is generally strengthened. The reduced end 41 of the hanger 8 passes through the opening 49 in the casing head plate |1 and is internally threaded to receive an upward extension as will be described. A peripheral groove 46 in the 'hanger provides a fluid passage to a flow line I2 from radial passage 48 in the same manner as was described in connection with hangers 6 and 1. It is to be understood, however, that ñuid in passing from the tubing 4 to the flow line t2 must ‘ pass radially through both of the hangers 1 and 8. Since a passage 48’ may or may not be -in mating relation with the >llow line I2 a second pe ripheral groove 44 »is- provided in the hanger 1 to serve as a passageway whereby the fluid from the tubing 4 may pass to :dow line I2 regardless of the angular position of either the hanger 1 or the hanger 8. v The tubing string 4-is connected to thc hanger 8 through an adapter bushing 50 having a tapered bore 5| adapted to receive a self-seating valve 52. The cover plate I1 is of particular construc tion as may be seen in Figs. 4 and 3, and com at its lower end in a head 15 having a rounded end 16 toy be received by a. complemental surface in a. cavity 11 in the upper end of the valve member 52. A flanged collar 18 surrounds the >valve stem 66 and is threadably fixed within the cavity 11. 'l'he length of this collar is insuil‘l-cient to rigidly hold the head 15 in contact with the bottom of the cavity. In this manner the valve member 52 may move both angularly and rotatably relative to the valve stem 66 where by the valve 52 may assume a position for proper seating upon the seat 5| and at the same time rotation of the valve upon the valve seat will not occur during seating or unseating of the valve. When it is desired to utilize the valve 63 to terminate flow from the well under pressure through the `flow line I2 the gate valve 60 is closed. The valve member 52 is moved to such position adjacent the lower end of the body 64 by turning the handwheel 61 that when the valve 63 is screwed into position on stem 6| the valve member 52 remains within the stem. It is thus obvious that in this manner the stem is closed to the ñow of liquid from the Well. The lgate valve 60 is then opened by means of the hand wheel 62 whereupon the valve 52 may be closed upon its seat by turning handwheel 61, thus closing the passage from _the flow line 4. From the foregoing description of the appli 50 55 60 65 70 cants’ preferred embodiment, the construction, operation and advantages-oi- the present inven tion are‘ believed to be apparent and will sug placed about the reduced end 41 of the hanger ' gest other modiñcations to those skilled in the 75 prises complemental half sections 20 and 2| whereby the composite plate can be conveniently art. aria-co4 It is to be understood that the foregoing disclosure is to be interpreted as illustrative and not in a limiting sense, except as required by the prior art and the spirit of the appended claims. What is claimed as new is: ' 1. A combined casing head and christmas tree lfor wells including a casing, a casing head se cured at the upper end thereof, said casing head 3 having a valve seat at the upper end thereof, and a valve movable to and from position to engage said Valve seat and close oiî the flow from said ñow line. 7. A combined casing head and christmas tree for wells including, a casing head for attachment toß the casing, an upwardly-flaring seat in said casing head, a plurality of concentric strings of iiaring upwardly to provide an inner, down-` pipe in said casing, a hanger on each radial out wardly tapered seat, a plurality of concentric f pipe hangers engaging at diiîerent _levels within said seat,- a string of pipe on each hanger, a sep arate outlet for each string-of pipe extending radially outwardly from the upper end of each let from each hanger through said casing head, 10 the inner of said pipes constituting the flow line having a valve seat at the upper end thereof, and a gate valve connected to the inner of said hangers, the body of said gate valve extending 15 pipe through the hanger therefor and through upwardly, means closing the upper end of said 15 a separate opening in said casing head, and a valve body, a valve rod extending downwardly iiow vpipe in each of said outlets. ^ through said closing means and said gate valve 2. A combined casing head and christmas tree and a valve on said rod engageable in said valve for wells including a casing, a casing head se seat. 8. A casing head, a plurality of separate con~- 20 20 cured at the upper end thereof, said casing head ñaring upwardly to provide an inner, down centric pipe hangers supported therein, pipes wardly tapered seat, a plurality of concentric pipe supported by said hangers, separate radial out hangers engaging at successively higher levels lets from each hanger through said casing head, within said scat, a string of pipe on each hanger, a valve seat in the inner of said hangers, a gate 25 a separate outlet for each string of pipeextend valve body extending upwardly from said inner 25 ing radially outwardly from the upper end of hanger, a gate valve therein, a stuñing box, _a each pipe through the hanger therefor and valve onsaid rod and means on said rod to move through a separate opening in said casing head, said valve to and from said seat. separate means to anchor each hanger in posi- , 9. A casing head, a plurality of concentric 30 tion in said lcasing head, and a ñow pipe in each hangers supported therein, each of said hangers of said outlets. having a peripheral groove to form a fluid pas - 3. A well casing, a downwardly-tapered casing sage, a tubing string attached to each of said head thereon, a plurality of concentric strings of hangers and an outlet passage from each tub pipe inside said casing, separate hangers for 4ing string through said casing head, said pas 35 said strings, each successive inner pipe being ex-` sage including a radial passage from within the 35 tended above the next adjacent outer one to hanger to said groove. terminate at‘a higher point, radial outlet at the 10. A casing head, a plurality of concentric upper end of each string extending/through its hangers nested within said casing head, a tubing hanger and said casing head and 110W'` pipes con string attached to each of said hangers, a valve nected with each outlet. r 4. A~well casing, a downwardly-tapered casing head thereon, a plurality of concentric strings of pipe inside said casing, separate hangers for said strings, each successive inner pipe being ex tended above the next adjacent outer one to terminate at a higher point, a radial outlet at the upper end of each string extending through its hanger and said casing head and flow pipes connected with each outlet, the inner- of said pipes having an annular, upwardly presented shoulder and plates secured to said casing head and engaging said shoulder to anchor said hangers in position. ' . 5. A well casing, a downwardly-tapered casing head thereon, a plurality of concentric strings of pipe inside said casing, separate hangers for said strings, each successive inner pipe being ex tended above the next adjacent outer one to ter minate at a higher point, a radial outlet at the upper end of each string extending through its hanger and said casing head, separate means engaging each hanger with said casing head to seat at the upper end of the inner tubing, a flow line radially from said inner tubing and its associated hanger, a stufling box closing the upper end of said stem, va valve rod passing through said stuiling box, a valve on the lower end of said rod and means on said rod forv mov ing said valve to and from said seat. . l1. A casing head assembly comprising- a body, a tapered bowl therein, a plurality of hangers ` to be stacked in said bowl to engage the taper of said bowl, and a cap on' said body to engage so the innermost of said hangers to clamp all of said hangers in sealing position in said bowl. 12. A casing head assembly comprising a body, a tapered bowl therein, a plurality of hangers to be stacked in said bowl 'to engage the taper 65 of said bowl, a cap on said body to engage the innermost of said hangers to clamp all -of Said hangers in sealing position in said bowl, and means to flow fluid laterally through each hanger and said head. 60 13. In a well head assembly, a casing head, a . set ofä nested casing hangers therein, each con tacting with said head, a iiow passage laterally through two of said hangers and said head, a anchor the hangers in said casing head, and iiow pipes connected with each outlet. 6. A combined casing headand christmas tree tubing hanger engaging within the uppermost for wells including, Ateasing head for attach ' casing hanger, an adapter bushing in said tub ment to the casing, an upwardly-daring seat in ing hanger, a tubing secured within said-bushsaid casing head, a plurality of concentric strings ing, and a valve adjustable to and from said of pipe in said casing, a hanger on each string adapter bushing to control the flow of iluid from _ 7. supported in said seat, a separate radial outlet Said tubing; from each hanger through said casing head, the JAMES MOORE McDONOUGH. inner of said pipes constituting the ilow line GRANVIILE A. HUMASON.