US1528145A

US1528145A - Combination tubing socket

Info

Publication number: US1528145A
Application number: US617555A
Authority: US
Inventors: Emmet N Davidson
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-02-07
Filing date: 1923-02-07
Publication date: 1925-03-03
Anticipated expiration: 1942-03-03

Description

Mar. 3,1925.

E. N. DAVIDSON COMBINATION TUBING SOCKET Filed Feb.v '7, 1923 2 SheetS-She-efl l Mar: 3, 1925.

E. N. DAVIDSON COMBINATION TUBING SOCKET 2 Sheets-Sheet 2 Filed Feb. '7, 1925 Patented Mar. 3, 1925.

UNITED STATES'.

EMET N. DAVIDSON, 0F BRECKENRIDGE, TEXAS. n.

COMBINATION TUBING SOCKEI.

.Application med February 7, 1923. serial Na. 617,555.

a citizen of the United States, residing at Breckenridge, in the county of Stephens and State of Texas, have invented certain new and useful Improvements in Combination Tubing Sockets, of which the following is a specication, reference being had to lthe accompanying drawings.

This invention relates to combination tubing sockets and has for an important object thereof a tubing socket adapted for use in removing broken parts of tubing from deep wells.

An important object of the invention is to provide means of this character which is capable of use with all types of tubing and of different forms of breaks of the tubing and which is likewise capable of usev for removing the broken ends of sucker rod lines and the like.

A 4further object of the invention is to provide a device of this character which providesin combination a means for gripping the casing exteriorly and a means for gripping the same interiorly, each of such means being so constructed as not to interfere with the normal operation of the other.

A. still further object of the invention is to rovide a device of this character from whichthe engaged tubing may be readily removed.

Another vobject ofthe invention is to provide a device of this character which may be readily lowered into the well casing for engagement with the tubingv and which is so Yconstructed that accumulated gas, oil or Water within the well bore will not interfere with its insertion.

An additional, object of theinvention is to provide a device of this character which is readily removable from a socket engaging tubing which is broken olf within the casing of the well to a socket for engaging tubing which is broken olf beneath the well.

It is well known to those familiar with the art that in the construction of deep wells after the bore is completed, the casing is elevated and a charge of high explosive placed in the lower end of the well beneath the casing and exploded to enlarge the opening beneath ,the casing and provide a pocket into which the oil or the like may flow, and tubing is then inserted in the well through which the-oil or the like may be pumped,

the lower end of this tubing projecting below the lower end of the well casing. This tubing in deep wells often becomes broken, sometimes breaking due to a cave-in of the shot hole, as`the enlarged lower end of the bore is generally termed, or is broken within the shot hole due to the fact that the movement of the tubing within the hole is not limited by the casing and accordingly too great a strain is often applied to the same with a resultant breakage. Furthermore, the tubing adjacent the upper ends of the casing is subjected to a terrific strain due to the weight of the tubing beneath and accordingly the tubing sections often part at thecouplings thereof. For this reason, the majority of the tubing employed in deep wells is of that type usually referred to as upset tubing, in which the ends of the tube have been enlarged by upsetting the same to give an increased threading larea for engagement by the coupling. These upset ends of the tubing are diiicult to engage by the ordinary form of socket which often takes what is commonly termed a foul grip on the tubing resulting in slippage and consequent damage to the tubing and possibly to the derrick and workmen employed therein. An important object of this invention accordingly becomes to provide a single tool which is capable of gripping the tubing within the casing or within the shot hole and which is so constructed as to render impossible the; improper engagement thereof with upset tubing and which at the same time is capable of use with the ordinary type of tubing.

These and other objects I attain by the construction and arrangement shown in the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention land wherein like reference characters designate like parts throughout.

In the drawings Figure 1 is a vertical sectional view through a socket constructed-in accordance with my invention showing the head, barrel, slip socket and spear in use;

Figure 2 'is a similar view showing the wing socket, spear and head -in use;

Figure 3 is a section taken on the line 3 3 of Figure 1; and

Figures 4, 5, 6, 7 and 8 are partially' 'diagrammatic views showing various manners of connecting the tool for different uses.

. cess having a Figure 9 is a section ou line 9 9 of Figure 2.

Referring now more particularly to the drawings, the numeral 10 indicates a head which 1s adapted at its upper end for engagement with a tool line as indicated at 11. At its lower end the head is provided with a reduced extension 12 which is exteriorly screw-threaded, as at 13, for engagement with a barrel 14. The lhead has formed in' the lower face of the reduced eX- tension 12 thereof a socket 15 for the reception of a tubing spear 16. The head has formed therethrough ports 17 opcnin Y through the head adjacent the upper end thereof and through the'lower end of the extension 12.

The barrel 14 is made of a desired length and' is provided at its lower end with a reduction 18 of the same external diameter as the reduced extension 12 and which is externally screw-threaded for interchangeable engagement with a slip socket 19 or a wing soc et 20. It will be obvious that the slip or wing sockets 19 and 2O are interchangeably engageable with the lower end of this barrel or with the reduced extension 12 of the head 10. The lower end of the reduced portion 18 of the barrel has its lower face upwardly and inwardlyv inclined, as ndicated at 21. The wall of the barrel has formed therein ports 22` one of which is arranged so that thel gripping part 23 of the spear 16 may be observed to note whether the same is operating properly or no.' These ports and the ports 17 of the head 10 serve to permit the passage of iuid. gas or the like when the device is being lowered into or withdrawn from the casing C of the well.

The spear 16 is made of a diameter such that it enters the tubing with which it is to coact with but a slight clearanceand has its lower end rounded` as indicated at 24, so that it may readily enter such tubing. The upper end of the spear 16 immediately adjacent the threaded portion thereof formed for engagement in the socket 15 of the head, is provided with an enlargement 25 having a downwardly directed shoulder 26 against which the upper end of the tubing will abut to limit its movement and expose a portion of thel spear for engagement by a wrench sothat the spear ma)v be removed from the head 10. The exterior of the enlargement 25 is polygonally formed for such engagement. lAdjacent its lower end the s ear 16 is formed with a reiiorizontally disposed upper Wall 27 and an upwardly and inwardly inclining side wall 28. This side wall has formed therein a dove tail groove 29 which isengaged by a dove tail lug 30'formed upon the gripping element or slip 23.- Adjacent the lower end of the groove, a liey 31 extends transversely thereof preventin the removal of the sli from the lower em of the oove. The si 23 is substantially triangu ar in form an has its outer face curved to correspond to the curvature ofthe tubing with which it is to coact and formed with teeth 32 for engaging the tubing. This slip is of less length than the recess and is of such size that when located at the lower end of the recess its outer face projects beyond the plane of the outer face of the spear so that the teeth thereof may engage the tubing, the combined widths of the spear and slip when the slip is in the lowermost position being greater than the internal diameter of the tubing with which the spear is to coact and the combined widths of the spear and slip when the slip is at the upper end of the recess being less than such diameter.

The slip socket 19 is provided with an eX- I, ternal reduction 33 which is exteriorly screw-threaded for interchangeable engagement with a band 34 or with the wing socket 20. The lower endV of the slip socketl these inclined faces continuous or comple,

mentar)1 when the band is in the proper po- IPS.

sition. The bore of the slip socket tapers downwardly, as indicatedat 37, and has formed in the wall thereof substantially vertically extendino' dove tail rooves 38 which are envaged by similary formed lugs 39 upon s ips 40. The outer faces of these slips or those which will be disposed toward a tubing entering the socket arc vertical and are curved to correspond to the curvature of the casing with which they are to coact` these faces being formed with teeth 41 for engaging the tubing. The slips 40 are removable from the socket 19 so that they may be interchanged to permit coaction of the socket with tubing or rods of different external diameters. The wing socket 20, which as above set forth is capable of interchangeable engagement with the head 10, barrel 14 or slip socket 19, is in the form of a barrel 42 having a bore 43 4of the same diameter as the bore of the bai rel 14 and provided with ports 44 corresponding to the ports 22 of the barrel 14 and through which the slip 23 may be observed. The lower end of the barrel is split, as indicated at 45 and the bore of such lower end enlarges downwardly. as indicated at 46. The wings 47 formed by splitting the wing socket are resilient and have a tendency to spring outwardly to a diameter greater than the diameter of the casing C with which the socket is designed to codicated at 48.

In fishing for tubing T of ordinary constructionwhich is broken ofi' within the casing C of the well, the slip socket 19 provided with slips ofthe proper size may be attached' either directly to the head 10 and the spear 16 omitted or this socket may be attached to the lower end of the barrel 14 which is in turn engaged with the head and the spear 16 employed. The band 34 is employed upon the socket when the device is putrto this use and as the device is lowered into theA well, the tubing engaged by the inclined lower edges and 36 of the socket 19 and band 34 `Will be guided into the bore 37 ot' the socket. The slips 40. employedfin the socket 19 on such an occaslon will'be of such size that when in the lowermostl position they restrict the bore 37 to a diameter less than the diameter of the tubing to beV engaged. The tubing engaging against these slips, will force the same, upwardly,`lower ing of the device being continued until the tubing engages against either the head 10 or the shoulder 26. at the upper end of the spear 16 it' the same be employed. The device is then hoisted and the slips "which will be maintained in engagement with the side walls of the tubing by gravity will be forced downwardly by the engagement of their teeth with the tubing so that they wedge in against Vthe tubing and secure a very firm hold thereon. If the spear 16 is being employed, the. slip 23 thereof will move downwardl c ausiner the s ear bod to enfrao'e D 2D D againstt-he internal diameter of the bore at one side and the slip at the opposite side,

providing a very firm grip so that thetubing may be hoisted from the well.

When employed for removing tubing having upset ends, the spear 16 is preferably employed together with the barrel 14. and the slip socket 19. With .this type of tubing, the slips 4() employed are preferably of such size that when in their lowermost position, while immediately adjacent the' outer face of the casing, they do not actually engage there-l against. Theenlarged head of the tubing in passing into the bore of the slip, socket elevates these slips until they are spaced apart a suficient distance to permit the passage of the head when they are dropped by gravity to the lower ends of the grooves. When in this position they restrict slip socket to suoli an extent that the head T of the casing cannot 'possibly ^pass therethrough. The casingmoving upwardly engages t e lower end of the spear and is guided thereon and finally comes to rest abutting the shoulder 26. The device is then elevated and the slip 23 of the spear will engage the inner Wall as hereinbefore described, locking the spear and tubing to- ,socket are provided, the barrel 14 is the bore 37 of the gether so that the tubing is being elevated by the spear. lVhen being so elevated, motion of the tubing T from side to side is pre# vented by the slips 40, thus preventing any undue Aslde strain being placed upon the spear to bend or otherwise injure the same. If the slip 23 of the spear fail to work, the head T of the tubingwill cometo rest upon the upper ends of the slips 40 so that the tubing will be supported.

lVhen employed for removing tubing which is'broken oli' below the lower end of Y y directly with the head, the spear engages the tubing to elevate the same. If'the socket 19 is employed alone, the tubing passes upwardly through the bore 43 into the bore 37 of the socket where the tubing is engaged byv the slips used and the operation in engaging the tubing is similar to that above described for engaging tubing broken off within the casing.

From the foregoing it is believed to be ob- 1' 40. here both the spear vand vious that a combined socket of this construction is -readily adaptable for engagement with tubing of the usual construction whether the same be broken off within or below the casing C of the well. It will furthermore be obvious that by omitting the spear, the socket 19 may be employed for removing broken rods and the like. Many lchanges being possible in the specific construction of the device as hereinbefore set forth, I do not limit myself to such specific structure except as hereinafter claimed.'

Iclaimz- 1. Means for removing broken tubing from well casings including a head adapted for attachment to a drill line, a spear engaged with the head of less diameter than the internal diameter of the casing to be engaged, a slip carried by the spear normal-ly.

maintained by gravity in a position Where4 its outer face projects beyond the outer face of the spear, such outer facev of theslip being provided with gripping teeth,`sa'1d i. attachment to a drill line, a spear en aged '-with the head of less diameter than t e internal diameter of the casing to be engaged, ,a slip carried by the spear normall maintained by gravity in a position wiere its louter face projects beyond the -outer face 4of the spear, such outer face of the slip bey y' ing provided with gripping teeth, said slip y bem movable upon the application of upwar pressure thereto to a position where f `it-is concealed within the spear, and means carried by the head for guiding tubing for f `engagement by Said SPGM', Said Spear being provided in its lower end with a spear receiving socket, a barrel engageable with said head, and a slip socket interchangeably engageable with the barrel of said head.

4. In a device of the type described, a head provided upon its lower end with a reduced threaded extension, a barrel and a Slip socket each having'l at its lower end a reduced extension of t e same diameter as the reduced extension ofthe head and screwthreaded and each provided at its-upper end with internal screw-threads engageable with the screw-threaded extension of the head,` the lower faces of the extension of the barrel and slip socket being upwardly and` inwardly inclined, and a band interchangeably engageable with the last named extensions and. having an inclined lower face 'complementary to the inclined lower face of the extension.

5. In a tubing fishing tool and in combination with a head formed at its lower end to provide one member of a coupling and in its lower end with a spear receiving socket, a barrel, a slip socket and a win socket each provided at its upper end wit a coupling member complementary Lo the coupling member' of the head, said barrel and slip socket being provided at their lower ends with coupling members identical with the coupling member of the head, the lower fas of the lower coupling members of the barrel and slip socket being upwardly and inwardly inclined, and a. ring interchangeably engageable with the lastnamed coupling members and having an inclined lower face complementary to the inclinedlower faces of the coupling members.

6. In a tubing fishing tool and in combination with a head formed at its lower end to provide one member of a coupling and in its lower end with a spear receiving socket, a plurality of tubular guides including a slip socket provided at their upper ends with coupling members complementary to the coupling members of said head and at their lower ends with coupling members similar to the coupling members of said head, and means selectively engageable with the lower coupling members of said guides providing at the lower ends thereof when applied an upwardly and inwardl inclined surface to direct and engage tu ing into said guides.

In testlmony whereof I hereunto aiiiX` my v signature.

EMMET N. DAVIDSON.