US1559662A - Casing-shoe guide - Google Patents

Description

Nov. 3, 1925- 1,559,662

R. C. BAKER V CASING SHOE GUIDE Filed March '14. 1925 '3 LJ N /7,?

' l/VVENTOR. REUBEN c. BAKER.

' ATTOHAEZS.

.7 Patented Nov. 3, 1925.

UNITED STATES PA EN OFFICE,

REUBEN C. BAKER, OF COALINGA, CALIFORNIA, ASSIGNOB TO BAKER, CASING SHOE COMPANY, A CORPORATION OF CALIFORNIA.

CASING-SHOE GUIDE.

Application filed larch 14, 1923'. Serial No. 924,948.

To all wlwm it may concern.

Be it known that I, REoBEN C. BAKER, a citizen of the United States, residing atv Coalinga, county of Fresno, and State of California, have invented new and useful Improvements in Casing-Shoe Guides, of which the following is a specification.

This invention relates to deep well equipment'and particularly pertains to a casing 1 shoe guide.

' hard substances such as shell or a very hard strata of clay andthe like. To protect and guide the casin shoe during the lowering operation, a 1de is fitted to the end of the shoe. T is guide is generally of a '20 fragile nature and is purposelydestroyed after serving its period of usefulness.

It is common practiceto secure a guide in" the end of a casing shoe by, threads and by a frictional connection. These methods have proven unsatisfactory as the former requires considerable time and expense to turn the threads in the casing shoe, es cially shotlld the location of the well be such that machine shop facilities are lacking.

The second method is also objectionable for the reason that ordinary friction connections do not secure the gu1defirm enough in the shoe. This is especially true when the guide is employed as a stop for plugs used when pumping. liquid cement down into the well to force it around the outside of the casing for the purpose of excluding surface water and strengthening the casing.

Therefore, it is the principal object of the present invention to provide a sim ly constructed, eificient and inexpensive guide for the purpose described, which may be expeditiously and securely fitted in the end of-a casing shoe.

The invention contemplates the use of'a guide-of fragile nature that may be fitted to the end of a casing shoe and which is provided with wedge means that may expeditiously driven into firm-.contact'with the surface of the shoe after the guide is fitted thereto to firmly maintain the guide in lace.

no form whichthe invention 'may assume is exemplified in the following descripthe sleeve as shown in 0 tion and illustrated by way of example in the accompanying drawings, in which Fig} 1 is a vertical section through a Well casing and shoe disclosing a guide em bodying the invention applied thereto.

ig. 2 is a view of the guide in side elevation.

Referring more particularly to the accompanying drawings, 10 indicates a well casing, 11 a casing shoe and 12 a hollow guideffixed in the bottom of the casing shoe. This, ide is of fragile nature and is forms with a spheroidal body portion 14 formed inte al with a sleeve 15 which is intended to i is inwardly tapered as at 16 forming an e inserted within the bore of the casing shoe. The upper end of the sleeve annular shoulder 17. The lower portion of the sleeve is perfectly cylindrical so as to snugly fit the bore of the shoe 11.

,Fitted around the tapered portion 16 of the sleeve are segmental wedges 17. In the present case there are four wedges. The 1nner" -faces of these members are tapered to coincide with the tapered portion 16 of 1. The outer faces of these wedges are nular; serrations 18. To permit the wedges to driven upwardly when the fitted to the casing shoe, the s eeve is formed with a plurality of. apertures 19. A

drift pin or bar may be inserted through rmed with an- 7 ide is thesej apertures to engage. the wedges and drive them upwardly guide in'place. v

The bottom of the body portion- 14 may to securely wedge the be closed and 'lugged, but in the present instance Ipre er to use a check valve 20 which is held seated upwardly against the seat of the valve opening 21 by a spring 22. The, mounting of this valvewill permit the guide to be used as a floating plug to relieve part of the burden of the casing when lowering the same through liquid in a well.

Also, the valve permits liquid cement to be pumped downwardly and be forced upwardly to strengthen the of surface water. I V

In; operation, the partsare assembled as shown in Fig. 2 and inserted into the end of thejgcasing shoe. A drift pin may then be through the casing around the casing to force the wedges. upwardly. Due to the.

same and prevent seepage inserted through theapertures 19 and driven v From the foregoing it is ObVlOllS that acomparatively simple eflicient and inexpensive shoe guide has been provided that may bl: tightly secured in the end of a ;casing s 4 V v,

10-\ While I have shown the preferred form will be 'forme body portion, a sleeve formed as a continuar wardly and outwardly tapered and insertible in the end of the casing, the lower end of saidsleeve being of a diameter substantially the same as the largest diameter of said tapered gortion whereby a shoulder I between said ta. ered portion and the remainder of the s eeve, segmental wedges surrounding, said tapered tqgmy invention, it-is to be understood that 4 .v ious changes in .the constructioniofthe "device may-be made without de arting from the spirit of the invention as. defined in the" 15 "appended claim. Y

' Having thus described-my invention, what I claimand desire to secure by Letters Patentis'z-f p In combination with a well casing, a guide 20 member adapted to be fitted to the end [thereof to protect and guide said casing, said guide member comprising a hollow port-ion. above .said shoulder,- said wedges havingitapered inner faces coinciding with the taper ofsaid tapered portion of the sleeve, and serrated outer faces engageable With-the interiorsur face of said casing, said sleeve having openings formed therein whereby said wedges may be driven upwardly to firmly hold the guide member in placeion the casing.

REUBEN o. BAKER.

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