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Publication numberUS1494693 A
Publication typeGrant
Publication dateMay 20, 1924
Filing dateAug 22, 1921
Priority dateAug 22, 1921
Publication numberUS 1494693 A, US 1494693A, US-A-1494693, US1494693 A, US1494693A
InventorsPeter Loi
Original AssigneePeter Loi
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Collar protector for rotary drill pipes
US 1494693 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

' May 20, 1924.




0-5 wwn A TTORNEXQ Patented May 20,1924.



Application filed August 22, 1921; Serial No; 494,338.

To aZZ whom it may concern:

Be it known that I, PETER L01, a citizen of the United States, residing at Maricopa, in the county of Kern and State of California, have invented new and useful Improvements in Collar Protectors for Rotary Drill Pipes, of which the following is a specification.

My invention relates generally to drilling apparatus, and more particularly to protecting devices for the collars or nipples that are utilized for connecting rotary drill pipe sections to each other; the principal object of my invention being to provide a relatively simple, practical and inexpensive protecting device in the nature of a sleeve that may be easily and quickly applied to rotary drill pipe sections, and which will, when properly applied, wholly enclose the connecting collar or nipple and protect the same against wear while in operation.

It will be understood that the connecting collars or nipples of rotary drill pipe sec-- tions are subject to rapid wear as a result of contact with the well casing or the wall of the drill hole, and when the collars or nipples become worn to a certain degree they will expand under the weightvof the lower portion of the drill pipe, thereby permitting a section of said pipe to become detached from the upper section, and as a result much time and labor is involved in fishing and removing the broken section.

It is the purpose of my invention to provide simple means which, when applied for use, will prevent wear of the collars or connecting nipples and consequently eliminate the dropping of the lower portionoof the drill pipe and likewise eliminating the time labor and expense involved in the fishing operations.

With the foregoing and other objects in View, my invention consists in certain novel features of construction and arrangement of parts that will be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a side elevational view of a portion of a rotary drill pipe, and showing my improvedcollar protecting device in position thereupon.

Fig. 2 is a vertical section taken on the line 22 of Fig. 1. e I

Fig. 3 is an elevational view of the adjacent ends of two sections of drill pipe connected by theusual collar or nipple, and

with packing rings arranged at the ends of said collar or nipple. A i

Referring by numerals to the accompanying drawings which. illustrate apractical embodiment of my invention, 10-'10 'desig nate sections of rotary drill pipe, the end portions thereof being externally threaded in order that they may be seated in the ends of an internally threaded collar or nipple 11, and which manner of coupling rotary drill pipe sections is now in general use.

The protecting device contemplated by my invention includes a sleeve 12, the opening 13 through the lower portion of which is of such size as to receive one of the drill pipe sections 10, and the opening 14 in the upper portion of said sleeve being of such slze as to accommodate the collar or nipple i 12 an annular horizontally disposed shoulder 15, andwhen the device is applied for use, a packing ring or gasket 16 of fibrous material, leather, or rubber is positioned on the shoulder 15 and serves as a seat for the lower face of the corresponding collar. or v nipple 11. The upper portion of opening 14 in the sleeve 12 is internally threaded in order to receiye the externally threaded lower portion of a short tube section 17, and interposed between the lower end thereof and the upper edge of the collar or nipple is a packing ring or gasket 18 of fibrous'material rubber, or leather. 7

When the tubular member 17 is screwed into sleeve 12, the packing rings 16 and 18 are compressed against the ends of the collar or nipple 11, thereby effectually preventing sand and the like from entering the joints between the ends of the drill pipe sections 10 and the collar 11, and which sand, if permitted to enter, would very rapidly cut the threads so as to permit the joints to open and the parts to separate.

Sleeve 12 is secured to one of the drill pipe sections 10 by one or more set screws, such as 19, and which latter are seated in the lower portion of said sleeve, and the upper portion of the protecting device is secured to the upper drill pipe section 10 by set screws, such as 20, that pass through the upper portion of tubular member 17.

Thus it will be seen that I have provided a relatively simple and practical protecting device for the connecting collars or nipples drill pipe sections and the connecting collar therefor, of a protecting device comprising a pair of detachably connected tubular members applied to the pipe'sections and enclosing the connecting collar, packing rings arranged between the parts of the protecting member and the ends of the drill pipe connecting collar, and means for securing the tubular members of the protecting device to the drill pipe sections With which I they are associated.

In testimony whereof I- have signed my name to this specification;


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2440441 *Aug 7, 1943Apr 27, 1948Ventura Tool CompanyTool joint
US2570246 *Nov 22, 1943Oct 9, 1951Kaiser Edward WExpansion means for jacket or conduit systems
US2823049 *Mar 3, 1954Feb 11, 1958Hombach Carl JBell and spigot inserted section pipe coupling and method of installation
US2939348 *Jun 2, 1955Jun 7, 1960Kelsey Hayes CoJoint construction together with means and apparatus for producing same
US3002771 *Jul 31, 1959Oct 3, 1961Chakroff Richard OCoupling devices
US3190377 *Mar 30, 1960Jun 22, 1965Central Mine Equipment CompanyEarth boring equipment for core recovery
US3333872 *Nov 18, 1964Aug 1, 1967Standard Fire Prot Equipment CMechanical pipe joint construction
US3971579 *May 5, 1969Jul 27, 1976Brown William AWeld clamp seal
US5059043 *Apr 24, 1989Oct 22, 1991Vermont American CorporationBlast joint for snubbing unit
US5314209 *Apr 23, 1991May 24, 1994Vermont American CorporationBlast joint for snubbing unit
US6098727 *Mar 5, 1998Aug 8, 2000Halliburton Energy Services, Inc.Electrically insulating gap subassembly for downhole electromagnetic transmission
US6439324Mar 30, 2000Aug 27, 2002Halliburton Energy Services, Inc.Electrically insulating gap subassembly for downhole electromagnetic transmission
US7361411Apr 21, 2003Apr 22, 2008Att Technology, Ltd.Hardfacing alloy, methods, and products
US7569286Mar 10, 2008Aug 4, 2009Att Technology, Ltd.Hardfacing alloy, methods and products
US20040206726 *Apr 21, 2003Oct 21, 2004Daemen Roger AugusteHardfacing alloy, methods, and products
US20070209839 *Mar 6, 2007Sep 13, 2007ATT Technology Trust, Ltd. d/b/a Arnco Technology Trust, Ltd.System and method for reducing wear in drill pipe sections
US20080241584 *Mar 10, 2008Oct 2, 2008Att Technology, Ltd.Hardfacing alloy, methods and products
US20090258250 *Jun 17, 2009Oct 15, 2009ATT Technology, Ltd. d/b/a Amco Technology Trust, Ltd.Balanced Composition Hardfacing Alloy
U.S. Classification285/45, 285/374, 285/404, 175/325.5, 285/414
International ClassificationE21B17/10, E21B17/00
Cooperative ClassificationE21B17/1085
European ClassificationE21B17/10W