US729846A - Casing and tubing elevator. - Google Patents

Description

VPATENTED JUNE 2, 1903r v 'H. W. BLAISDELL. APPARATUS FOR CLEANING SAND FILTER BEDS.

i APPLIGATION FILED MAY a. moz. No MODEL. e SHEETS-SHEET 2.

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PATENT CAslNe AND TUBING .ELEvAToa SPEGIFICATION forming part `of Letters Patent No; 729,846, dated June 2, 1903. vApplication filed February 3, 1902. Serial No. 92,379. (No model.)

To @ZZ whom it' may concerne:

Beit known that I, KENTON CH1oKERING,a citizen of the United' States, residing at Oil Oity,in the county of Venango, State of Pennthe sections closed as when in use.

Sylvania, have invented certain new and useful Improvements in Oasingand Tubing Elevators; and I hereby declare the following-to be a full, clear,V and exact description of fthe same, reference being had to the accompanying drawings, in whichf Figure 1 is a perspective View of a casing and tubing elevator embodying my invention, Fig. 2 is a perspective View thereof, the'sections open to receive the tubing o1' casing. Fig. 3 is a top plan view of the elevator, the sections closed as in Fig. 1. Fig. 4 is a side elevation of the elevator, the sections closed and the pin-latch shown in dotted lines. is a vertical section on the line 5 5, Fig. 4, to show Ighe vertical taper of the lockingarms. y

Like symbols refer to like parts wherever they occur.

My invention relates to that class of devices employed for lowering, raising, or drawing well tubing or casing, commonly termed casing or tubing elevators,7 and comprising suitable reins or bail-links, clamp-sections suspended therefrom, and a locking mechanism for the clamp-sections, and has for its objects to so construct and combine the clamp and lock mechanism as to insure the proper closing of the clamp-sections and support the same against forces which tendto strain the pivot and separate the clamp-sec tions laterally at their lower ends or at points below the bail-links.

To this end my invention, generally stated, embraces the combination, in a casing or tubing elevator and with the pivoted clamp-jaws thereof, of a yoke or link-latch, which includes the locking-arms above and a second lock below the bail-link of the elevator,where by the clamp-sections are supported against forces which tend to separate them and strain the pivot thereof.

There are other minor novel features of construction, as also combinations of parts, all as will be hereinafter fully set forth and claimed.

I will now proceed to describe my inven- Fig; 5

tion more fully, so that others skilled in the art to which it appertains may apply the same.

In the drawings, l and 2 indicate the clamp or jaw sections of the elevator, each provided with a perforated bailear or bail-lug c for the reception of the usual bail-links or reins A A. The clamp orjaw sections l and 2 have l the usual concave or semicircular tube-seats 3 3, are pivotally connected on'one side, as

at 4L, and opposite thereto are provided with the lugs or locking-arms 5 5a or equivalent projections for the reception of a yoke or linklatch G, which serves to lock the clamp-sections toge'therabove or atthetop. The lugs or locking-arms 5 5 are of the same General form in so far as both are recessed at their junction with the body of the clamp, as at 1a 2a, to form a yoke or latch seat and receive the upper end of the yoke or link-latch 6, which link-latch lies flush with and completes the upper surface of the clamp, and also in so far as both lugs or locking-arms 5 5 taper slightly from within outward (see Fig. 3) and from below upward, (see Fig. 5,) so that the 4yoke or link-latch as it is moved into position to close the clamp-jaws forces said lugs orlocking-arms 5 5 into apposition from withoutinward and from above downward and insures an effective support of the jaws or sections at the bottom of the clamp, where most required to relieve the pivot from undue strain and prevent the separation of the clamp-jaws.

The yoke or link-latch 6 is pivotally secured to the lug or locking-arm 1 by means of a bolt Ga, (either with or without a sleeve 6",) which passes through an elongated slot 5, so as to permit sufficient forwardlplay of the yoke or link-latch 6 to insure its proper seating when the jaw-sections l and 2 are to be locked by i the yoke or link-latch, and the slot or the interior walls of the link-latch converge to cor- -respond with the vertical taper of the 1ocking-arms 5 5, (see Figs. 2 and 3,) which arms or lugs the link-latch incloses when-the clampjaws are locked together. i

The lug or locking-arme is cut back or notched in, as at 5c, to accommodate the bolt 6a or pivot of the latch G and permit the linklatch 6 to be swung outward and free from arm 5*L when the jaw-sections 1 and 2 are to be opened, and said arm 5 is provided with a IOO . substituted, it' desired.

The inner faces of the lugs or locking-arms 5 5a may be slightly hollowed out or recessed, as at 5, if desired, to facilitate the separation of the jaws l and 2 when releasing th tube or casing,r from the elevator.

The construction of the elevator being substantially such as hereinbefore pointed out, it will be applied to the tube or casing;f to be raised or lowered as follows: The link-latch 6 being,Y thrown over and down to release the lufY or locking-arm 5 and the locking-arms separated, (see Fig. 2,) the tubing or casing;r is introduced between the jaws or sections 1 and 2, the locking-arms 5 5 brought together, after which the yoke or link-latch 6 is turned up and inward over the locking-arms and its upper end is forced down into the latch-seats 1 2a. In instances where the tubing or casing has a flange-thimble or coupling-sleeve the same may rest on the upper edge or rim of the jaw-sections 1 and 2 and on the yoke or link-latch, and the weightof the tubing will assist in holding: the yoke or link-latch firmly on its seat. The link-latch 6 as it is forced y forward and inward acts on the vertical and horizontal inclines or tapering parts of the looking-arms, (see Figs. 3 and 5,) so as to force the arms into contact, especially at the bottom of the jaws, and this also causes the locking-pin 7 to pass through the hole 8 in locking-arm 5, and at the same time, if the pinlatch is a'fIiXed to the link-latch 6, the movement of the latch causes the pin-latch 9 to engage the outer end of the locking-pin 7, and thus lock up and support the lower portion of thevclamp-jaws and pivot against lateral and torsional strains.

While the pin-latch is not necessarily affixed to the link-latch or yoke 6, it is preferably joined thereto, as it simplifies the construction, facilitates the locking and unlocking of the elevator-jaws, insures against accidental displacement of the pin-lock, and enables the pin-lock toalso assist in drawing Y together and supporting,` the locking-arms of the elevator-sections.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In a casing or tubing elevator having bail links, the combination with pivoted clamp-jaws having lockingarms or lugs, of a yoke or link-latch which incloses the lockingarms above the hail-links, anda pin-lock and latch therefor,which confine the locking-arms below the bail-links, substantially as and for the purposes specified.

2. In a casing or tubing elevator, the combination with pivoted clam p-jaws having locking-arms one of which is provided with a pin andthe other with a pin-hole, of a yoke or link-latch provided with an arm or pin-lock which engages the pin and forms a lock therewith, substantially as and for the purposes specified.

In testimony whereof I affix my signature, in presence of two witnesses, this' lst day of February, 1902.

KENTON CHICKERING.

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