US1774196A - Oil-well packing head - Google Patents

Description

Aug.26,193o. L. RDM/ls A 1,774,196

' on. WELL PACKING HEAD i Filed NOV. 26, 1927 ZIE//z//J- ZP/Z/PV/J.

5)/ irry.

Patented Aug. 26.5, v1930!* UNITED, STATES PATENT oil-ries LEWIS r. Davis, or SANTA, ANA, cantaor-,NIAk

, e .v ogm-WELL Maxine Huang' `Implication'filed November 28, 1927. Serial No\ 235,8'26 f 4 My invent-ion relates to a packing head for Fig. 3 is a horizontal section taken :on the the casings of oilwells, and has for. its prin'- line ---Snf Fig. 1. v cipal objects the provision of a relatively sim- 'i Figrl is an 'elevational View looking a ainst Y( ple, practical and eiiicient appliance that may 4the -underside of a portion of the meta ring 5 be advantageously employed at the upper that is ositioned on top of the elastic or com- 55 ends of oil well casirgs for packin the joint pressib e portion of the packer.

'or opening between the casing an the drill 1 Fig. 5 1s anlfenlarged coss section of.. the tubing so as to effectively eliminate any upper ring that is positioned on thev elastic possibility of blow-outs ;'-further to provide jor compressible member of the pagker. a packin head having a compressible` pack- Fig. 6 is a perspective view of a ,por-.tion of 60 ing mem erthat is formed,l in sections in the metal ring that is positioned against the order-that it may be readily positioned withunderside of the elastic or-compresslble memin the bowl or cylindrical member, that is apber. v

.plied to the upper end of the casing;-fur J Figy? is a vertical section takenlthrou 7 ther Ito provide means that operate indeythe upper portion of a modified form oft e B5 pendently of the weight of the `tubing for 'packing head. y

p35 A furtheobject of my invention is t'o gencarrying o acting upon the ycornpressible portion of the' 8 is a top-planfview of onefof the slips v packing head so as to compress thesame'anffused in the modified `form of' the packing effect a viuid pressure tight joint between the head. j f

casing and the tubing, and further t0 prOYide Referring by' numerals to the accompanylo a packing'lhead that will enable the tubing to ing drawings, which illustrate a practical be readily manipulated while being raised or' embodiment of my invention, v10 designates a lowered relative-to the casing. j x bowl or short tubular member, the lower por- A further object of my invention is to pro7 tion of which is internally threadedin orderJ vide a packing head having a compressible to receive the externally threaded upper end 75 member that is formed in sections, certain of of a'section of ordinary casing C and thelowwhich sections are formed of rubber .or analO- ver end of this bowll is also externally threaded gous elastic material, and Iwhich elastic Jsec-. as designated by 11 in order to. receive a fittions are arranged between and very firmly lting'which in some instances may be utilized anchored to metal rings or segmentsso "that for connecting the bowlto theicasin 80 said elastic members 'are very thoroughly `Formed through the wallfofthe bowl 10 s K,protected against .wear and. deterioration as a av s'hort distance above the threaded lower` resultof, contact 'with oil andgas that'may ortion thereof are threaded apertures-M19'l Y ow through the head. r J` orthe receptinn of pipes or tubes utilized in oil or gas -that discharges up- ,85

erally improve upon and'simplify the con- Wardly throughthe casing. f y struction ofthe existing forms'of casing head N Formed on thinner face of the bowl just 'packee y f v v l ,I above the ppenings 12is an inclined shoulder With the'foregoing and other ',objectsgin or tapered seat 13, upon which 'the lower ring 9 View,l myi'nvention consists in certain novel of the compressible packer is jadapted to. rest features nf construction and arrangement of and the upper endof the bowl is reamed to J parts that Vwill hereinafter be more fully deprovide anincllned ortapered seat 14 forl a scribed and claimed and illustrated in-the acvseries of ordinary tube engaging and supportn companying drawing, inwhiching slips' S, and which latter are provided on 95 Fig. lis a. .verticalv section taken through their *inner faces with horizontally disposed` the center of a packing liead`that embodies ribs or teethl that `are adapted to engage the principles of my invention. l the surface of the tubing T. The slips S are Fig. 2 isa horizontal section taken on the provided with suitable handles'Iv-I' preferably line 2-2 of Fig. 1 '-f J iexible, and whichare engaged when the 100 .ita

- diately above the slips are seated in or removed from the upper end of the bowl..

The compressible packing/'member or collar forming a part of my invention,

and which is 'positioned within the bowl immetapered .seat 13, is prefer- `V`Aably'formed in .halves or mating sections mediatesegment 18 of rubber .i

ments 16 combine to forma ring at the top o f. the packing collar and the upper outer corner of this that are identical in constrnction; the dividing line between the partsbeing vertically disposed and intersecting the axis of the body, and each part comprises anxupper seg-v ment 16 preferably of metal, a lower segment 17 .preferably of metal andan interor analogous compressible elastic material. The two segrinO' is cut away to forma Vcircumferential inc ined surface 19 that occuto horizontal and vertical lanes.

Formed in the under aces of the ring forming members 16 is a circumferentially disposed under-cut from the bottom o this groove upwardly L into the ring sections 16 are short recesses such as 21. These undercut grooves 20 and recesses 21 receive the upper portion of the ter is formed those portions of the' body of and recesses is sult ofthis arrangement the upper portions of the two- Asa }part elastic ring are very-rigidly secured to the top ring 16 and it is practically impos- \s1ble under working conditions to separate the metal and rubber rings or for one ring the ring to rotate relative 4to the other as such relative movement is prevented by the plugs of rubber that enter the recesses 21.

This manner o-f forming the joints between membersv 16 and 18 materially increases the life of the rubber ring 18, for the joints between said ring and the metal Aring 16 are protected against contact with oil and resultant deterioration of the rubber.

The lower two-part ring 17 is provided on its underside with a ser' s lui-"- :it snugly upon the inclined shoulder or ta ered seat 13.

ormed in the top of the two-part lower ring 17 isa shallow groove 23 and leading therefrom downwardly through the body of the ring are apertures 24, the lower ends kof yyhich are reamed or enlarged as designated When the body ofthe rubber ring 18 is formed portions thereof occupy and are vulring is canized in the apertures 24 having the enlarged lower. ends 25 ,.`and thus saidA rubber very securely anchored to the ring 17 and under working conditions it is practically impossible to separate the lower ring 17 from 'the elastic ring 18.'

Under normal conditions the two-part packing collar comprising the rings 16, 17 and 18 has an external diameter that is a slight degree less than the internal diameter of 4the bowl 10 and when'positioned in said bowl around the tubing T the two parts 0f the packing collar are assembled around the tubing and dropped into the bowl, and when at rest the tapered lower end of the collar rests upon the inclined seat or shoulder 13.

ln order to compress the two-part ring 18 and ei'ect a fluid tight joint between the bowl and tubing screws 26 are seated in threaded apertures 27 in the wall of the bowl :pies'an angle of approximately 45 relative roove 20 and extending' of depending vertically disposedl webs 2'the outer edges of .face of tube'T. -two-part elastlc ringg18, and when the lati 30 A jrubber that enter the groovee vulcanized therein. r

10; and the tapered for engagement with the inclined face 19, and after the packing collar ,has been inserted in theV bowl, screws 26 are turned inner ends of said screws being so that the same move inward and the tapered inner, ends of said screws bear on the inclined face 19, thereby forcing the upper ring 16 downward and compressing the elastic ring 18, and as a result fluid pressure tight vjoints are produced inner face of the bowl 10, and the external Vhenitvbecomes necessary to raise or lower the. tubing, screws 26; are partially withdrawn, thereby permitting the compressible 'ring 18vto expand and when this is done the tubing may be elevated or lowered as desired, and throughjhe ing may be supported at the desired elevation.

In some instances it may be found vdesirable to utilize'the weight of the tubing for compressing the packing collar, and where this is done the slips S are removed from the upper end ofthe bowl and the collar or nipple that connects two sections of the tubing is permitted to rest on top of ring 16, and thus etween the elastic ring and the use of the slips S saidtub- Y the weight of the tublng will move said ring J Obviously when ring 16 isfmoved down-f ward by'means of the screws 26 or by the weight of the tubing the two parts/of ring 18 under compression will expand equally in all directions, and thusthe joints between the ends of the compressible ring sections will be 'sealed and packed against the passage of fluid' pressure.

In the modid construction illustrated in Figs. 7 and 8,v screws 28 are seated in the slips S and the upper ends of said Ascrews being arranged in recesses 29 that' are formed in the upper portions of the slips. The upper ends of these screws are made non-circular for the reception of a socket wrench or the like, and when said screws are moved downward they will engage and bear upon the upper two-part ring 16 and move the same 1:0

I tion are the formation of the .packing collar in two parts, which greatly facilitates production `and manipulation when placed in or removed from the bowl, and further the vulcanizing of the intermediate rig sections 18 to the upper and lower metal ring sections 16 and 17, for by such arrangement the in-y termediate rubber ring is veryirmly'secure/d to the metal rings without the use of bolts or extraneous means. andthe life or period of service of the rubber vring is materially lengthened by reasonof the vfact that the joints between the rubber and metal rings are arranged so that itis practically impossible for oil-and gasto enter said joints.

packing head for oil well casings ,that is relatively simple in construction, inexpensive of-manufacture', capable of being compressed to produce a 'fluid tight joint bynthe manipu latlon of screwsV lthat engage vthe upper portion of the packing collar or by the weight of the supported tublng, and which packing head is very veffective in performing the functions for w ich-it is intended.44

It will be understood that minor changes in the size, form and construction of the various parts of. my' improved oil well packing head 'mayN be made and substituted for those herein shown and describedwithout depart- 'ing from the 'spirit of my invention, the'scope of which is set' forth in the appended claims.

- I claim as my invention: Y Y 1. In an oil well casing packing head,y a

packing collarcomprising a pair of sepa:

. rately formed and independently operable sections, each sectioncomprising upper and lower segments, each upper and lower segment being provided with an externally arv.ranged beveled face, the two beveled faces occupying oppositely disposedangular planes, externally arranged ribs formed on the segments of the lower section, and an inter-V mediate segment of compressible material with an internally arranged'shoulder, a packing collar com rising a pair of separately formed and in ependently operable, sections,

each section comprising upper and lower segment, each segment being provided at both ends with externally arranged bevelled faces,

the two bevelled'faces occupying oppositely disposed angular planes, an intermediate segi ment of compressiblematerial arranged be? tween each pair of upper and lower segments, horizontally disposed screws seaed in the wall of the bowl with their inner ends bearlng against the bevelled face on 'the upper pair of Thus Ait'will be seen that Ihave provided a,

segments, which screws are disposedsubstantially, 120 vapart and externally arranged ribs formed on the segments of the lower section. f i

4. In an 011 well casing packinghead, va

bowl adapted to be secured to the upper end of the casing, which bowl is provided with an internally arranged shoulder, a two part compressible packing collar adapted to v be positioned within the bowl and to encircle i the tube passing therethrough, the lower por- .tion of which packing. collar is `provided with an inclined shoulder thatengages theder at the upper end of the packin collar, f

horizontally disposed screws seate l bowl, the inner ends of which screws bear o n the inclined shoulder at the'top of the packing collar 'and which screws are arranged 120 apart. y

In testimony whereof Iaflix my si gnature. l'

LEWIS F. DAVIS.

arranged between each pair of .upper and lower segments.

2.v Inv an oil well casing packing head, a

`bowl adapted to be secured to the upper end of the well casing, which bowl is provided with an internally arranged shoulder, a packing collar com rising a pair of separately formed and in ependently operable sections, each section comprising upper and lower lsegment, each segment being provided at both ends with externally arranged bevelled faces,

the two bevelled faces occupying o positely disposed angular planes, an interme late segment of compressi-ble material arranged between each pair of upper and lower segments, horizontally disposed screws seated in the wall of the bowl with their inner ends bearing f against the bevelled face on the upper'pair of

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