Armored jam-joint sucker-rod
US 1326259 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
ARMORED JAM- 101m SUCKER R00.
APPLICATION FILED OCT-1B. I917.
Patented Dec. 30
17106115011) Faeri ll! 'wzn #9: $6022 T/wmpsolz rrE s'rn us PAT rt.
ROBERT w. cum: Ann WILSIE A. score: THOMPSON, 015' LOS ANGELES, CALIFORNIA.
ARMORED JAM-JOINT SUGKER-ROD.
Specification of Letters Patent.
Patented Dec. 3Q, 11919.
Application filed October 18, 1917. Serial No. 197,360.
To all whom itmay concern:
Be it known thatwe, ROBERT W. GUNN and WILSIE A. Soo'rr THOMPSON, both citizens of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Armored Jam-Joint Sucker-Rods, of which the following is a specification.
This invention relates more particularly to sucker rods for pumps used in deep wells such as the oil wells in Southern California where the wells range from 1600 feet or less are at the required depth.
The sucker rod has a cage and a valve therein at the bottom and is made up of sections of like length as the tubing sections.
Each sucker rod section has a threaded pin at one end and a threaded box at the other end to receive the pin and each pin springs from an enlargement of the sucker rod equal in outside diameter to the outside diameter of the box; and when the joint is screwed home the rim of the box and end of the enlarged rod at the root of the pin are jammed together with great force so as to insure that the joint will not loosen and become unscrewed;
The tight jamming together of the rod sections at their joints is necessary to prevent unscrewing and consequent parting of the joint.
The tendency of the rod to unscrew at any point not tightly jammed by tight screwing is very great, owing to various conditions of operation among which the following may be particularly ointed out, as follows, that is to say, the suc er rod is operated by a jack or a walking'beam which reciprocates the rod up and down in the pump tubing about 10 to 20 times per minute and owing to the great length of rod and the tendency of the sucker to float, the rod which in common practice is cylindrical, will buckle or bend more or less and the enlargements at the joints will strike upon and rub against the inside of the tubing, thus setting up vibration therein. Furthermore, the pump tubing may have some crooks in it with which the rod enlargements may contact as they rise and fall at each reciprocation. In addition to this is the lifting and seating of the valve which is usually a steel ball in a steel or iron cage.
The use of sucker rods of the character above described has been common practice for a long period of time including the thirty years last past and during all that time said sucker rods have been subject to wear out at the joints where the box contacts with or rubs against the pump tubing. Whenever the box at any oint becomes worn so as to seriously impair the strength of the joint the rod section thus wornbecomes unfit for use and is discarded, although the body of the rod may be in perfect condition. The discarding of such rods for this reason amounts to large sums every year and in addition to this loss, it sometimes occurs that a rod will part in the well from breakage of a worn joint, which causes further loss and delay and a fishing job of greater or less duration during which the well does not produce a profit but becomes a heavy burden of expense.
Our present invention is broadly new, basic, pioneer and primary in that it is the first and only contrivance that has ever been discovered or put into use to remedy this great loss and expense that has always been present and has ever ilfcreased with the increasing number and depth of said wells ever since the oil industry had attained any great proportions in Southern California; and yet it will be obvious in the following disclosure that the remedy was always within easyreach of the oil producers and only needed to be discovered and pointed out to oil producers; in order to enable them to eliminate the great loss, waste and expense to which they had been subjected.
This invention, in its broad, basic, primary and pioneer character, consists simply in constructing each sucker rod section with a pin longer than such sucker rod sections have heretofore had, and making for and applyiing to such pin a collar having an outside diameter greater than the outside diam: eter of the joint enlargement; said elongated pin being threaded at its tip to screw into the box so as to jam the collar between the shoulder of one section and the box of the other section, thus to enable the operatives to secure the joint against unscrewing by vibration just as completely as has been the case with the sucker rods in well practice heretofore, as above set forth. 1
It is understood of course, that said collars are provided respectively at each of the intermediate joints of the rod between the top of the rod and the sucker of the pump at the lower end of the rod; and that said collars are to be constructed to contact with the rod only in an accidental way and as a fender when the box or pin butt would otherwise strike on the tubing and thus become worn. In a rod 4000 feet long there will be some 200 of such collars, the friction and wear of which would be very great if the collars were in contact with the walls of the pump tubing all the time. Therefore it is important that the collars shall only be of a re uisite diameter, which while rojecting su ciently beyond the box and pm butt, to.
protect the same from wear, will be of such diameter that the use of the rod in pump tubing for which the sucker rod is adapted will be practical for pumping oil in the usual way.
Said collars may be made of 'malleable cast-iron or of such other material as may be practicable and available, thus enabling the attendants to replace the collars from time to time as they may become worn and before injury to the box or other part of the joint, thus indefinitely prolonging the life of the sucker rod.
The sucker-rods have been reinforced at their joints in various ways to guard against wear and breakage and an object of this invention is to provide a sucker-rod of this character having a joint which is reinforced and locked in a novel and superior manner for both strength and wearing qualities and which is so constructed that the member which takes the wear and adds the strength to the rod is easily applied to and removed from the olnt, and forms a lock to prevent loglsemngof the joint by vibration of the ro Another 'object is to stiffen the rod.
Other ObJEOtS are superior cheapnessof tions of a sucker-rod constructed in accordance with this invention.
Fig. 2 is an enlarged fragmental elevation of the joint of the rod shown in Fig. 1, the box and collar being shown in axial section.
Fig. 3 is an end view of the collar.
Fig. 4 is an end View of the box.
Fig. 5 is an end view of the pin and its butt.
Each section of the rod is of a single piece constructed with an intermediate body 1 and the butts 2, 3. One end of each rod section is provided with a box 4 internally screwthreaded and the other end of said section is provided with an elongate pin 5 of greater length than the screw-threaded seat 6 in the box into which said pin is to be screwed. All these parts are integral and form a single imit, The box is also rim counter-bored as at 7 in the usual manner. The pin 5 is provided with a screw-threaded tip 8 to fit the threaded bore of the box and to screw tightly thereinto. Preferably the main bod 9 of the pin is cylindrical and smooth. X collar 10 of slightly greater diameter than the butts for the box and pin slidingly fits upon the pin and is of sufficient length to be jammed friction tight against the adjacent butts of two sucker rod sections when the box of one section is screwed onto the pin of the other section, when the collar is in place on such pin. Y
The end faces of the butts and the collar form frictional contacts with each'othenthe corresponding circular traces 11 of which contacts are normal to the axes of the pin and collar. Said pin and box and the bodies of the rod sections are all co-axial, so that when the collar is in placeon the pin, and the pin and box are screwed firmly together with their contact faces friction tight against each other the rod will be straight and true and the joint is locked frictionally againstunscrewing by rod vibration.
. The root of the pin may have a frustoconical fillet as at 12 and the ends of the collar are counterbored as at 13 to accommodate any enlargement of this character.
. pose the joint having the worn col When the sections are tightly screwed together as shown in Figs. 1 and 2 the collar forms a solid brace between the butts of the rod sections. The collar forms a brace for the pin between its root and the box and the construction of the joint is calculated to take up vibration with less likelihood of crystallization thanin former constructions.
The collar may be made of cast-iron and may be of any desired length and diameter, the pin and its box being correspondingly constructed. No machine work is required upon the collar except to make its ends form true joints with the box and the butt which supports the pin.
In practical use the cylindrical collars on the completed rod, being of larger diameter than any other portion of the rod take all the wear that occurs through contact with the inside of the pump tubing, not shown; and in time some of'the collars will wear down, so as to require replacing with new collars.
To effect 'such replacement the rod is pulled sufficiently out from the tubing to exar and the box is unscrewed from the pin so that the collar may be lifted oil of the pin and a new collar placed thereon instead. Then the box will be screwed home and the operation of the rod in the'purnp may be continued.
The collar is adapted to be made of wood or paper fiber, raw hide or other durable wearing material which would not support a thread of suflicient strength to serve for coupling the rod sections and which is not likely to wear the tubing so much as if made of material adapted to couple the rod. The construction is comparatively cheap, as the box and the pin require no more threading than with the old style rod, and the collar may be made of material having superior qualities for prevention of destruction of the rod and tubing by wear.
It is understood that this invention is not in the nature of an anti-friction device such as has been proposed for the joints of revolving core barrels-used in core drilling; for in such devices the rotation of the barrel is always against the resistance of the rotating tool cutting the face of the rock at the end of the hole and such rotation and resistance positively prevents unscrewing of the joint, and in such case'the sleeve or bearing ring is anti-'frictionally mounted and cannot be jammed between the box and pin butt and such device is not adapted for and is nonusable for the purposes of this invention.
1. A sectional sucker rod for deep well pumps set forth in which each section of the .sucker rod is of a single piece constructed with an intermediate body and with butts at the ends of such body and in which one end of each rod section 1s provided with a box internally screw-threaded, and the other end of said section is provided with an elongated pin of greater length than the screw threaded seat in the box into which such pin is to be screwed; the pin being provided with a screw-threaded tip to fit the screwthreaded bore of such box, and to screw tightly thereinto; and a collar of greater diameter. than the butts, which collar fits upon the pin and is of sufiicient length to be jammed friction tight against the adjacent butts of two sucker rod sections when the box of one section is screwed onto the pin of the other section when the collar is in place on said pin; the collar being also of such external dimensions and form as not to interfere withthe customary functions of the sucker rod nor to contact, with the usual pump tubing except as a fender in an accidental way, substantially as set forth.
2. A sucker rod coupling comprising two members having end enlargements, one of said enlargements having an internal screw threaded socket and the other having a pin portion, the pin end of which is screw threaded fitting within the screw-threaded socket of the other portion, and a beveled shoulder at the other end; and a cylindrical collar with rounded edges and being of relatively larger diameter than the end enlargements; said collar being clamped between said beveled shoulder and the socketed portion.
3. In a sucker rod adapted to reciprocate the sucker of a deep well pump, the joint set forth comprising an enlarged end of one section of such sucker-rod provided with an internally screw-threaded socket; an enlarged end of another section of such suckerrod provided with .a pin having an external thread and adapted to screw into the screw threaded socket; and a collar around the pin and slidable thereon, and adapted to be jammed friction tight between the enlarged ends of said rod sections; said collar being slightly larger in diameter than the enlarged ends of said sections, substantially as set forth, for the purpose of taking the wear which heretofore has been destructive to such end enlargements of sucker rods.
4. A sucker-rod comprising a body, a butt and a pin, a second body, a butt and a box adapted to screw onto the pin; said pinbeing cylindrical and being threaded at its tip and smooth between its tip and the butt; and a collar of greater diameter than the butt fitting the smooth portion of the pin and jammed between the butts when the box is screwed home upon the pin, said collar forming a friction tigh t brace for the pin between its root and t e ,box.
5. A sucker-rod comprisin a body, a butt and a pin, a second body, a utt and a box adapted to screw onto the pin; said pin being cylindrical and being threaded.- at its 5 tip and smooth between its tip and the butt; and a collar of greater diameter than the butt fitting the pin and jammed between the butts when the box is screwed home upon the pin; said collar forming a friction tight 10 brace for the pin between its root and the its root and said 00 lar being conformed to the fillet.
In testimony whereof, we have hereunto set our hands at Los Angeles, California, 15 this 11th day of October, 1917.
ROBERT W. GUNN. WIIJSIE A. SCOTT THOMPSON.
JAMES R. TOWNSEND.