US1600863A - Well-casing spider slip - Google Patents

Description

Sept. 21 1926. 1,5 0,863

R. c. BAKER WELL CASING SPIDER SLIP Filed Oct. 5, 1924 provide a :device Patented Sept. 21,

Y pair tar nnnnniv o..BA ERfor coALmeA, cnmroitnra, nssrcnon T0 BAKER ca'srnc sr-ion COMPANY, or HUNTINGTON PARK, CALIFORNIA, a conronnrroiv or CALIFORNIA.-

' WELL-CASING srrnnnsiirr. j

I Application filed October 9, 1924. Serial No. 742,664..

I The present invention relates to improvements inwell casing spider slips and has for an object to provide an improved slip:

tion which may be readily assembled and disassembled and which though made in four sections, is handled substantially as two sections. r I

.l/Vith the foregoing and other objects in View, the invention will be more fully described hereinafter, and will be more partic ularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 is a longitudinal section taken through a. portion of the device.

Figure 2 is a perspective view of the connecting link.

Figure 3 is a plan view of the device with theplugs 26 removed. 7 I

Referring more particularly to the drawings the device consists of four sections, 5, '6, 7 and 8 all having the usual form of teeth 9 with which to grip the pipe, and formed with tapering outer faces 10 to fit a similar opening in the spider whereby to guide the sections of the slip against the casing. The casing is thus held firmly while an adjoining section is screwed into the coupling.

,Although there are four sections according to the present invention thesev sections are handled-as two because of the fact thatthe companion sections 5 and 6 are coupled by the link 11 and the opposite pair of sections 7 and 8 are coupled together by the link 12. These links are the same and one such link is shown in Figure 2 as being composed of'a substantially flat-bar 13 of metal or other appropriate material provided with the enlarged beaded edges 14 and 15 substantially rounded in cross section and adapted to fit into sockets of sim ilar form, said sockets being produced in'the adjoining faces of the sections 5 and 6. Such sockets are indicated at 16 and 17 and dividually move radially toward the center slots 18 and; 19 also made inthe edgeslof the members 5 and 6 to communicate through the side walls withthe slots. The

sockets and slots are slightly wider than the metal of the link so that a loose motion is permitted the two sections. The sockets extend-only-partially the length of the section as indicated in Figure 1 so-as to preventthe link from dropping through. The link may be removed by simply inverting the sections whereupon such link will drop out. The' link couples the two sections 5 and 6 together yet permits of a radial flexi bility or.relative movement in the sections such as will allow the sections to "accommodatethemselves to the contour of the pipe wall and effectively grip said wall.

Bolts or screws 20 and 21 are threadedor otherwise secured in the upper portions of the sections 5 and 6 and are provided with perforated j heads to receive. the terminalportions 22 andv'23 of the handles or bails 24 having the .cylindricalfgrips 25 extend-' ing about the intermediate portions thereof.'

The extremities of'the handles after passing through the openings in the heads or bosses 20 are turned at substantially right angles as indicated at 26 in order to secure the handles to the sections while permitting the handles to swing. By the use ofthe handles the two half sections may be lifted by a single workman while each half section virtually consists "of two flexibly united members capable of relative adjustment.v v

in the use of the device the twohalf sections are set down about the 'piperin the opening in the spider and these sections being heavy descend by gravity and cause the teeth 9 to'bind into the well casing. The

are taken into account, in effect upon the I 'iipe there are foursections which compensate for any irregularity in the surface contour of the pipe; and these four sections 1nof the pipe andeifectively grip the wall thereof, so that there is no possibility ofthe pipe turning when the upper section of the casing is screwed into the pipe connecting the collar or joint.

The use of four sections permits of a more it perfectalinement around the pipe than three v sections as now commonly used and the presout device therefore secures a more efficient grip on the pipe. The three'section slips require the attention of two men When the slips are placed, Whereas 1n the present case with four sections the device is handled by a The plugs maybe se- In Figure '1 the plugs are shown as just lightly'touching the upper ends of the links.

It obvious that various changes and I modifications may be made in the details of construction and design of the above specifically described embodiment of this 1nven tion Without departing from the spirit there of, such changes and modifications being re stricted only'by the scope oi the following claims. I

Y 'What is claimed is 1, A slip comprising a vplurality of gripping sections having slots opening through adjacent Wallsand through the tops of the sections and sockets at the inner ends of the slots larger than the slots and openings through the tops of the sections, links flex- .of the sockets above said enlarged ends of ibly connecting adjacent sections composed oi enlarged ends and thin Webs connecting said enlarged ends, said links adapted to be slid down through the tops ofadjacent sectionswith the enlarged ends fitting rotatably in the sockets and thewebs fitting loosely in the slots, and removable means in the top portions of the sockets to hold thelinks therein. 7

2. A slip comprising pairs of gripping sections, each pair having slots opening through adjacent side Walls and tops of the sections and enlarged rounded sockets connecting With theinner portions of the slots being closed attheir bottoms and open at their tops, links flexibly connecting said pairs of sections composed of enlarged rounded ends and thin Webs connecting said 4 enlarged ends, said links adapted to he slid down through the tops of the sections With the enlarged ends entering said socketsand the Webs fitting loosely. and .rotatably in card slots, removable plugs to close the tops the links, and a handle connected to the pair oi: sections.

. REUBEN o. BAKER,

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