US1466986A

US1466986A - Centering and cementing device

Info

Publication number: US1466986A
Application number: US569520A
Authority: US
Inventors: John P Burgher
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-06-19
Filing date: 1922-06-19
Publication date: 1923-09-04
Anticipated expiration: 1940-09-04

Description

Sept. 4, 1923. 1,466,986

J. P. BURGHER CENTERING AND CEMENTING DEVICE Filed June 19. 1922 Patented Sept. 4, 1923.

UNITED STATES" JOHN P. BUBGHER, OF LONG BEACH, CALIFORNIA.

CENTEBING AND CEHENTING DEVICE.

Application med June 19, 1922. Serial No. 589,520.

To all 'whom it may convent:

Be it known that I, JOHN P. BURGHER, a citizen of the United States, and resident of Long Beach in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Centering and Cementin Devices, of which the following is a s ci cation,

In drilling o1 gas and similar wells it is fre uently necessary to pass through strata om which water flows into the well, and it is necessary in some manner to stop this iow of water. This has been frequently done b inserting a stopper of cement, and then rillin through the cement to continue the we to a greater depth.

An object of my invention is to provide a device that willfacilitate this operation and enable such cementing to be done accurately and eicientl Another oliject is to provide a device which will insure the cement being properly centered so that it will contact with the walls of the bore on all sides.

A further object is to provide a device that will be left in the bore and with the cement will form a reinforced device similar to reinforced concrete.

Other objects will be apparent from the followin .detailed description and the appended c aims.

In the drawings:

Figure 1 is a lon itudinal section showin the bore of a wel with the device placed in position preparatory to supplying cement thereto. A

Figure 2 is a similar view on an enlarged scale showing the cement forced into position.

Fi ure 3 is a perspective view of the packing evice.

The bore A of the well is shown as passing through the usual strata B into a stratum C through which water may fiow into the well bore. A device D, shown in Figure 3, has two hollow cylindrical end portions 1 and 2 connected by outwardly bowed spring strips 3. The end portions are made somewhat smaller than the bore or casing of the well, and the spring portions 3 should be bowed suiiiciently to come in contact with the walls of the bore A. The strips 3 may be fastened to the end portions in any desired manner.

The upper cylindrical end rtion 1 is reamed to the desired size wh1 e the lower portion 2 isprovided with internal screw threads 4. A hollow pipe 5 provided with a threaded lower end 6 is employed for placing the device D in position. The device D is screwed upon the lower end of the ipe l5 as shown in Figure 2 and lowered to t e desired position.

Cement is then forced through the pipe 5 under pressure in any old or desired manner. After the proper amount has been supplied it will be noted by reference to Figure 2 that cement has been forced out` of the bottom of the cylindrical portion 2 and forms a plug 7. It has also been-forced from the bottom up through the openings between the bowed portions 3 and around the outside 4of the cylindrical portions 1 and 2 as shown at 8 and 9. The bowed sprin portions 3 are imbedded in a hollow cylin er 10 of cement whose internal diameteris that of the end portion 1 and external diameter'is that of the bore A of the well.

If the well is to be bored deeper, the plug 7 of cement will -be drilled through and the bore extended to the desired depth. In case the desired bottom has been already reached, the device will form a bottom plug obviating the necessity for any further provision for closing the bottom of the bore.D

The bowed spring portions not only' form with the cement a reinforced cylindeii; but when the device D is first placed in position, these portions will center the device and insure a uniform thickness of cement on all sides of the central bore.

The size and proportions of the device D regarded as limited only by scope of the appended claims.

I claim as my invention:

1. A cementing device for wells comprising hollow cylindrical end portions, and outwardly bowed spring metal strips connecting the same.

2. A cementing device for wells comprising hollow cylindrical end portions the lower of which is provided with internal screw threads, outwardly bowed spring metal strips connecting the same, and a positioning device engaging the threaded portion.

3. A cementing device for wells comprising hollow cylindrical end portions 0f smaller diameter than the bore of the well, 'and outwardly bowed sprin 'metal strips contacting with the bore of t e .well to center the device.

4. A cementing device for wells comprising hollow cylndrical end portons, out# y' lower of which is internally screw threaded,

outwardly bowed spring metal stripsl connecting the same, and a conduit member fitting within the end portions and engaging said screw threaded portion, thus serving as Leccese a. means to position the device cement thereto 6. A plug device for wells comprising hollow cylindrical end portions, outwardly bowed spring metal strips connecting the same, and a cement casing for the whole.

7. A plug device for wells comprising hollow cylindrical end portions, outwardly 25 bowed metal strips connecting the same, and a cement casing forming a plug for the lower end portion, surrounding the end portions, and having the bowed strips embedded therein.

In testimony whereof, l have hereunto subscribed my name JOHN P. BURGHEB.

and supply