US1082786A - Elevator for well tubes or casings. - Google Patents

Description

P. P. YNGLNG.

BLBVAI'OB. FOR WELL TUBES 0R UASINGS'.

APPLICATION FILED SEPT. 9, 1912.

1,082,786. Patented De0.`30, 1913,

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Specification of Letters Patent.

Patented Dec. 3G, 1913.

Y Application led September 9, 1912. Serial No. 719,439.

n To all whom t may concern.'

i Be it known that I, PAUL F. YNeLING, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented cer-j e tain new and useful improvements in Elea Vvators for lVell rlSubes or Casings, of which the following is a specication. l

This invention relates to certain new andi useful improvements in elevators for well tubes or casings, and has for its object to;I provide an elevator which is adapted to bef placed over a well tube or casing to hold; the same while being raised or lowered, the, elevator being of such construction that it. may be readily attached and detached from the tube .or casing.

ln the make up of a well casing elevator,l to accord with my invention there is present' a tubular portion or ring that is provided on opposite sides with outward projecting trunnions which are recessed to receive springs and bolts, the interior of the ring having bores of two diameters and an intermediate inclined portion, the ring having associated therewith by means of the spring bolts slidable weuging clamps or slips which carry hooks for engagement with the coupling of the well tube or casing when the elevator is placed `over the well tube or cas-f ing. In the accompanying drawings, which illustrate one preferred form of the inven-l tion, Figure l is a side elevation of a well: casing elevator showing the parts in posi-g tion to be placed over a well tube or casing for engagement therewith. Fig. 2 is a side elevation viewed from a point looking toward the end of one of the trunnions and in, this view the bail is broken away. Fig. 3` is a plan view partly in section, the section being taken on the line 3 8 Fig. l. Fig. 4C` is a vertical section showing the well casing elevator in position over a well tube or cas-y ing as when placed thereon and prior to the engagement of the wedges or slips with the coupling on the well tube or casing, andl Fig. 5 is a vertical section of the well casing elevator showing the same positioned to clamp the well tube or casing with the wedges in engagement with the coupling on the well tube or casing.

Referring to the drawings the well tube-'f or casing 6 has thereon the usual coupling 7 for connecting another section of pipe thereto, as is common in oil and Artesian wells, and it is with such a tube and coupling that they elevator engages for holding the casing while it is being raised or lowered and when sections of casing or tubing are being added to or separated from the string. The size of the tubing or casing elevator in which my invention is embodied depends upon the size of the tube or casing and the coupling.

The elevator embodies in its make up a one piece or solid ring 8, that is shaped to provide internally circular or cylindrical seats for slips or wedging-clamps, the smaller bore of the ring being of greater diameter than the external diameter of the coupling, so that the ring may be passed over the coupling 7, the upper end of the smaller bore joins an inclined wall 9, such wall extending to the lower edge of a larger bore 10, the upper edge thereof being beveled. The exterior of the ring 8 on opposite sides has hollow trunnions 11 which are engaged by eyes or loops l2 of a bail 13, that is engaged by the usualcasing hook when the well tubing or casing is to be raised or lowered. The trunnions l1 are bored to receive annular nuts' 14: and to provide openings for bolts l5 and seats for springs 16, the springs encircling the bolts and by bearing against the nuts and the ring 8, about the openings for the bolts tend to .force the bolts outward. The bolts have fiat cylindrical heads which are seated in recesses formed in the inner faces of slips or wedging clamps, that engagewith the underside of the coupling on the well tube.

The wedging clamps or slips 17 are of similar construction a pair of like clamps being associated with the ring 8 by the bolts l5, 15, and the wedging clamps or slips have their inner faces shaped to provide centrally and oppositely disposed segmental portions and from the vertical edges of the segmental portions the inner faces areslightly beveled, as shown by Fig. 3 of the drawings. The exterior configuration of the wedging clamps or slips 17 corresponds with the interior of the ring 8 against which they are drawn by the spring actuated bolts which effect frictional engagement ofthe wedging clamps with the interior of the ring, the pressure being sufficient to maintain the wedging clamps in a raised position as shown by Figs. 1 and 2 of the drawings, and when in a raised position the lbeveled lower ends of the wedging clamps will bear against the inclined Vall 9 of the ring and the exterior inclined portio-n of the wedging clamps engage the beveled edge of the upper portion of the ring; thus maintaining the wedging clamps by frictional contact with corresponding inclined surfaces. The wedging clamps or slips 17 are slotted for the passage therethrough of the bolts l5 and surrounding the slots are recesses to receive the heads of the bolts. Each of the wedging clamps Vhave lpreferably in line with the slots to.

project above the upper edges of the. same lugs 19 with transverse apertures for the purpose of, connecting thereto hooks 20, which swing inward and are maintained ine an inclined position by engagement with?- the upper inner edges of the wedging clamps; asfshown by Figs. 1 and 3 of the drawings.=

In the construction'in which my inventioni is embodied itwill be noted thatwhen the several parts are assocated that there are no separable parts requiring manual manipula tion .to attach or disconnect the tool from the well tube or casing, the ring beingl in one piece'has the wedging clamps or slips con-V nected to the ring and the hooks are held or carried by the wedging clamps, and these features or parts of my invention may be varied in form and proportion or as tominor details without departure from the principle of thefinvention or combination as set forthl in the claimsvof this specification.

In operation thevbail of theelevator connected to a:hoisting cable, the wedgingf clamps or `slips are moved to extend partially abovek the. ring and the hooks are. swungs across the opening between the wedging; clamps, with the parts soy positioned theele= vator isplaced over1theatube or casing and; when lowered the hooks will engage the coupling so that the; ends of the: wedging clamps will be below the coupling, the posi-v tion being indicated by the slacking of the cable, when draft is applied to the cable up ward movement will .be imparted to the'ringf and the wedging clamps will be forced inward to embrace the tube or casing so. that theupper edges of the clamps will be under the. coupling, whenithe tube or -casing may' behoisted. As the bail is in swinging connection .with the ringthe elevator may be placed iii-.position when the tube orcasingl is in other than vertical'position.. It will also :be noted that the elevator maybe read# ily detached by lirstpushing downwardonf the bail and thenilifting by means of the hooks.

rFrom the foregoing. description and by reference to the accompanying drawings the construction and operation will be readily understood to those skilled in the art and acquainted -vvith well tools and well boring or driving machinery.

1. An elevator for well tubes or casings comprising a one piece ring having hollow trunnions, a bail connected to the trunnions, means maintained in slidable engagement with the ring and spring actuated bolts which are partially housed in the hollow trunnions. of the' ring and engage with said slidable means andwith the ring.

2. Anelevator. fork welltubes or casings comprising` a ring having trunnions, abail connected `to Vthe trunnions, coupling engaging means and spring actuated bolts reciprocally maintained by thehollow trunnions for slidably associating the coupling engaging means with the ring.

3. An elevator for well tubes or casings comprising a ring having an inner wall of different diameters on dilierent planes, coupling and tube engaging means which are externally shaped to correspondwith the inner wall of the ring, slots through the coupling and tube engaging, means, Y and spring actuated bolts which are partially housed iny the ring and extend inward to engage with the coupling and tube engaging means to hold the samein engagement with 4the ring.A

4t. In an elevator for well tubes or caSingS, a bail, a ring havingv trunnions. which are engaged by the bail, wedging clamps having slots therethrough', spring actuated bolts `carried by the ring for engagement with the wedging clamps to hold the sameV in .movable engagement with the ring and.hooks maintained in swinging engagement with the wedging` clamps.

5.. In a tubing-orv casing, elevator, a ring having bored trunnions,` a bail connected :to the trunnions, wedgng clamps movablyassociated with the ring, bolts seated to move longitudinally in the trunnions and to engagextheswedging, clamps Vto associate the same in `movable. relation withfthe ring.

6: In a `tubingor casingy elevator, aring .having an internalzdiameter greaterA than the tube orcasing and provided withltrunnions located adj acentto the upperV portion of' thering, abail which :engages with the trunnions, wedging clamps maintained in Y -movable engagement with the ring and hooks of ,rigid material having oneend bent to .provide a pipe engaging portion. the opposite endbeing pivotedto each of the wedging clamps in` such a mannerrto swing inward. and extend .l toward the. opposite wedging clamps.

7. `In .a `tubing; or casing l`elevator a.ring

having on opposite sides trunnions, a bail with which the ring is associated by engagement with the trunnions, slidable members associated with the ring to be capable of longitudinal and lateral movement and hookspivotally attached to and maintained 1n swinging engagement with the slidable members to extend across the space between PAUL F. YUNGLING. Witnesses:

H. N. RIETHMAIER, OLIVER S. BARNUM.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, I). C.

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