US2210815A

US2210815A - Tool joint pin

Info

Publication number: US2210815A
Application number: US252498A
Authority: US
Inventors: Linney Scotty Alton
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-01-23
Filing date: 1939-01-23
Publication date: 1940-08-06
Anticipated expiration: 1957-08-06

Description

Aug. 6, 1940. s. A. LINNEY TOOL JOINT PIN Filed Jan. 25, 1959 Inventor Patented Aug. 6, 1940 4 UNITED STATES I 2,210,815 TOOL JOINT PIN Scotty Alton Unney, Refugio, Texi Application January 23,

3 Claims.

invention relates generally to tool joint structure for use in drill pipe employed in drilling o l and gas wells, and particularly to a tool joint pin having release mechanism whereby the tool to which the joint is connected may be easily pulled out of the drill pipe, and an important object of my invention is to provide arrangements of the character indicated above which are adapted to be used on each joint of the drill pipe.

Other important objects and advantages of my invention will be apparent from a reading of the following description taken in connection with the drawing, wherein for purposes illustration I have shown a preferred embodiment of my invention.

In the drawing:

Figure l is a general transverse vertical sec-- tionai view taken through'the embodiment and showing the sleeve seated in circulation hole closing position.

Figure 2 is an enlarged sectional elevational view of the dog mechanism.

Figure 3 is an elevational view of Figure 2 taken at right angles thereto.

Figure 4 is a horizontal sectional view taken through Figure 1 approximately on the line 4-4 and looking downwardly in the direction of the arrow.

Referring in detail to the drawing, the numeral 5 generally designates the body of the joint which has an internal threaded flange 6 at its upper end in which the drill pipe 1 is threaded. AYflat helical spring 8 occupies the space between the shoulder 9 defined by the flange 6 and the shoulder ill defined by a reduced bore portion II. The reduced portion 1 I isv smooth so as to provide, a comparatively frictionless bearing surface for the sleeve I! which is to be worked up and down in the bore portion ii in conjunction with the spring 8 which engages the top of the sleeve l2 so as to normally urge the same to a depressed position in which the beveled lower end I! of the sleeve seats on the beveled shoulder i4 which joins the lower end of the reduced bore portion l I, all as clearly shown in Figure 1 of the drawing. Below the shoulder l4 the body of the joint has areduced bore is which is axially aligned with and substantially of the same diameter as the bore IS in the sleeve l2. Adjacent the upper part of the bore in the sleeve .1 2 is a radially outwardly beveled annular notch H which accommodates the releasing dogs l8, l9, respectively, which are pivoted coaxially at opposite sides of the release rod 20 which has an enlarged diameter portion 2i below the pivotal point 22, which enlarged 1939, Serial No. 252,498

diameter portion normally depends through the sleeve l2 into the reduced bore portion I! of the tool body and has a pointed lower end 23.

Respective links

24, 25 are pivoted at their lower ends to the respective-dogs l8, is, as indicated in 5 Figure 2 of the drawing, at the points designated 2, 21, and the upper ends of these links are pivoted on opposite sides of a collar 29 slidably arranged on the rod 20 above the dogs and within the lower end of the tube 28 which extends up 10 through the drill pipe I as indicated in Figure l of the drawing so as to be capable of being raised and lowered selectively. When the tube 28 is lowered from the position shown in Figure 2 this engages the

links

24 and 25 so as to bring the 16 does It, ll toward each other and out of engagement with the annular notch il in the sleeve l2,

in which condition the releasing dog assembly may be withdrawn through the drill pipe, or passed down therethrough to occupy a position 20 in the joint I, as the case may be. With the dog assembly pushed down below the annular groove II, the dogs I, it may be caused to spread by gravity or the action of the fluid in the drill pipe sufficiently to bear against the beveled face of the groove I! to reach the position illustrated in Figure 1 of the drawing and thereby provide for elevating the sleeve i2 by pulling up on the tube 28,

to a position in which the circulation holes III arranged through the wall of the body 5 above the shoulder l4 are uncovered and circulate water through the joint to release the joint in the event that the same became stuck. The lower end of the joint body 5 is provided with an externally v threaded tapered point 3! for connection with the tool (not shown).

Although I have shown and described herein a preferred embodiment of my invention, it is to be definitely understood that I do not desire to limit the application of the invention thereto, and any change or changes may be made in the structure and arrangement of the parts, within the spirit of the invention and the scope or the subjoined claims.

Having described the invention, what is claimed as new is:

l. A tool joint comprising a tubular body having a stop shoulder within the lower part thereof and below circulation holes formed through the wall of said body, an imperforate sleeve slidable so in said body between a position above and exposing said holes to a position in which the lower end of the sleeve engages said stop shoulder and closes said holes, spring means compressed between an upper part of said tubular body .and the top of said sleeve and normally holding said sleeve 3. In a device of the class described, a vertically on said stop shoulder, and means freely insertible ed tubu a member having a transverse through the upper end of said body and through port therein and a valve seat below the port, a said sleeve, said means comprising a carrier insleeve slidably arranged in the tubular member, cluding a rod, upwardly extending arm's pivoted spring means for normally holding the sleeve on 5 at their lower ends on said rod, links connected the seat and closing the port, said sleeve having to and between the rod and the arms, and an opan internal groove therein forming a downwardly erator on the rod and engageable with said links facing shoulder, a rod adapted to be passed for contracting the arms to pass freely through through the tubular member into the sleeve, arms the body and the sleeve, said operator being operpivoted at the lower ends to said rod and having 10 able to permit said arms to spread within said their upper ends adapted to engage the shoulder sleeve, said sleeve having an internal lift shoulder for raising the sleeve when the rod is pulled upengageable by said arms in their spread condiwardly, links pivoted to intermediate portions of tion upon elevation of said rod to lift said sleeve the arms and extending upwardly, means for slida in t he r sistan e of s id sp ng means and ably connecting the upper ends of the links to the 6 e p se Sa circulation hOlES- rod and a small tubular member passing over 2. A tool joint cc r ng to claim 1 wherein the rod and when moved downwardly engaging said operator compr s s a t e loosely telescoped the links for moving the arms inwardly and clear on said rod and surrounding portions 01' said th h ld r,

nks. sco'rry ALTON LINNEY.