US1044873A - Joint for well-casings. - Google Patents

Description

A. G. PELKERJ Jom'r r03 WELL mamas.

APPLIUATION FILED NOV. 20, 1909.

Patented NOV. 19, 1912.

2O a and operated within the tu UNITED STATES. PATENT orFroE.

ALBERT G. FELKEBQOE MARSHFIELD, WISCONSIN.

Join-r Ion WELL-casinos.

To all whom may concern:

Be it known that I, ALBERT .GoFE-LKnn,

a citizen of the United States, residing at Marshfield, in the county of Wood and State of Wisconsin, have inventeda new and usefui Joint for Well-Casings, of which the following is a specification.

This invention isan improved joint for sectional sheet metal tubes and is intended more particularly for well. casings although it is adapted to many uses.

The primary object of the invention is to provide a joint between 'the members of a sheet metal tube which will be so constructed as to avoid the presence of internal shoulders or projections which are liable to, be struck by the sharpened edges of drills passing through a well.-oasing in the sinking of a well or by pump rods or other devices which'ma-y be subsetgiently arranged e or casing.

In the use. of constructions heretofore provided, much" annoyance has been caused by the drill or. the pump rod or other elements striking againstabrupt mternalprojections or shoulders on. the casing andbeing thereby marred or more seriously damaged so that,

delay in the sinking of the well resulated and it was necessary to frequently stop the operation of the pump to repairbroken parts. The construction'devised by me and forming the subject matter of the present appli cation thoroughly overcomes these defects and prolongs the life of the casing as 'well -as' the life of the elements operated within the same.

- i The stated object and such other inciden- 'tal objects as will hereinafter a pear are attained in, the device illustrated in the ac-' 40 co'mpanying drawings, and the invention consists in certain novel features which will be hereinafter first fully described and then specifically claimed.

" ing my inventibm. Fig. 2 is a longitudinal section of a portion of the tube shown in Fig. 1 with the parts separated: Fig. 3

is asimilar view showing thepart s joined.

Fig. 4 is .alongitudinal'section of two tube sections jointed" in accordance with my invention.

of which consistsof four sections 1, 2, 3

and 4, as shown in Fig.1.- Each of these lengths Specification of Letters Yatent. Palte ted Nov. 19, HIKE. Application filed November 20, 1909. Serial No. 528,102.

exterior annular bead,'5, which constitutes a stop to limit the movement of the other section and. defines the male end 50, This result is caused by the end of the said other section bearing against the stop head 5, as will be readily understood,-,and as shown in Figs. 1 and 3. Near its opposite end each section is provided with a tapering or contracted portion 6 whereby an internal shoul-- der 7 is provided, which shoulder defines the female end and is adapted'to be en'- gaged by the male end-of a meeting section when two sections are fitted together. -'Ihe inner surface of the section will thus present an mclined or tapered surface 8 so that should the drill or the pump rod or other element working within the tube sway to one side itwill strike the said inclined 'surface 8 and be thereby deflected away from the sharp shoulder or edge resented b the end of the inner or engaged consequently, the defacing'or cutting of the surface of the working element will be avoided. v Three important advantages are gained by the contracted portion, 6, as follows-the resulting shoulder acts as an internal-stop bead to prevent further longitudinal movement of the connecting member, it acts as a deflector by reason 0 its inclined surface and, it positlvelyprotects the otherwise exsection an sections is provided near one end with an posed end of the inner tube so that elements moving within meet with no obstruction and cannot come in contact with abrupt edges or surfaces. A fourth advantage is that the contracting-of the connecting member resultsin the inclined surface and shoulder rendering the tube more firm and causes it to retainits round-form. The end sections, land 4, of each member or length of the tube are each provided at one end with spi- .rally disposed beads or threads, 9, which are In the drawings, Figure'l is a side view of a length of 'a sheet metal :tube embody.

adapted to engage similar beads or threads on' the ends of meeting lengths to ciiup'le the into a casing or tube, as will be readily understood on reference to Fig. 4.

In constructing a tube according to my invention, thesections 1, 2, 3 and 'are driven tightly together,-'as shown in 'Fig.

1, and the meeting ends secured by rivets, 10. The lengths thus produced are shipped to the point where the tube is to be used and there assembled by rotating the end- ,section- 1 of one length upon the end sec tion 4: of another length with the threads ea h simultaneowly engages the extremity V of the other o that the strain is not concentrated upon one member and tcleseopino ot' the llltitll tlh of the joint is positively" prhrente l. The lemale'entl of each section heiontl the tapering or contracted portion is Slightly ejreater in tlianleter than the male CIItt 5o they will tit, nieely together. \Yith my (anmll'in'tion, the length are'arra-ngctl with the smaller or male entt upward, antl the t'mnale entl ol? the meeting section is titled may he running (town the outside of the tulle will he carried over the joint ZUlLt prerented l'rom paesing through the same into the tube or easing. 1t wiltbe seen that, when the receiving end of each isection 'bears against the etop head on the other section it. eonstitutee a seat therefor, the internal deflector T serving to owzrhanethe end in the seat and being at its smaller eml of an internal diameter equal to the internal diameter 01 the inner or received end.

'hile the ii'ivention is particularly ad VLHMMM over thesame so that water Which hanging vantageous an applieil to rgell memes, it may also he useit in clown spouts renli lat'in tlllitfj or other ttl-lMH: The romtrur tion prolongs the lite ol" the tube a well asol'theelrment operateil, within, the eaiue.

Having thus le1- rrilnal my invention, what I claim is:

A well easing or the like eonaisting at a plurality oli' tubular Hl' lllHlS having interlittine .male amt .temale portion.-, hilltl see-- tionS hein gcircular in cross seetiom the being an outetantline' annular et 'vp he: on the male portion, :tittt a ta wreu portion constituting an interior annular tleth rtor in the female portion, the internal tliunn-tei of the ,t'emale portion being titlilfilllllt ltlly equal to the external diameter ot the mate portion, said female portion hearing against the atop head amt comtitoting a seat. for the male portion. the internal tlrllretor everthe male mrtion xml, haun its smallest internal diameter equal to the in-- ternal diameter of the male portion. and means for securing the sections together.

In. testimony that 1 claim the forego ng as my own, I have hereto'allixeil my signature in the presence oi two wt'itmm eea ALBE (T lilll iltl lit.

' )N'itnesses:

731. J. LANGE, .llitY T. l rniltrtx.

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