US2213580A

US2213580A - Stop for oil well casing and tubing

Info

Publication number: US2213580A
Application number: US236862A
Authority: US
Inventors: Benjamin J Festervan; Nathan F Henderson
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-10-25
Filing date: 1938-10-25
Publication date: 1940-09-03
Anticipated expiration: 1957-09-03

Description

p 1940- B. .1. FESTERVAN ET AL 13,580

-' STQP FOR 01L WELL CA'SING' AND TUBING Filed Oct. 25. 1938 2 Sheets-Sheet 1 3, 1940. a. J. FESTERIANV 2,213 58 STOP FOR OIL WELL CASING AND TUBING Filed Oct. 25, 1938 -2 Sheets-Sheet 2 WWW Patented Sept. 3, 1940 2,213,580 STOP FOB. on. WELL CASING AND TUBING "FATE NT OFFICE Benjamin J Festervan and Nathan Henderson,

Monroe City, Tex.

Application October 25, 1938, Serial No. 236,862

6 Claims.

The present invention isdir'ected to a stop, adapted to be inserted in tubing or in casing for any desired purpose in oil wells. More particularly it is directed to a stop especially suited for use in conjunction with the paraflin drill described in co-pending application, Serial No.,

The principal object of the present invention is the provision of a stop of the character described having a main body portion on which are slidingly mounted slips having serrated edges which upon separation or spreading apart are adapted to engage the walls of the tube or casing in which-the stop is to be set and hold the stop in position against downward shocks.

An additional object of' the present invention I the provision of a. stop of the character described which is adapted to be set in place by an upward jar rather than by a downward jar.

A further object of the present invention is the provision of a stop of the character described which is so constructed as to set more firmly in place by any impact it receives from above.

Another object of the present invention is the provision of a' stop of the character described having an inside fishing recess.

An additional object of the present invention is the provision of a stop of the character described in which the setting mechanism-is containedon the inside and is provided with can be sheared by a jar.

Further objects and advantages of the present invention will be apparent -from the following detailed description of the accompanying drawings in which-'- Figure 1 is a side view of the whole assembly as it is lowered into the tubing; l

Figure 2 is a side view, partly in section, of the assembly, turned 90 from the position shown Figure 1, with the theyassume when thesetting operation is about completed; g Y

' Figure 3 is a side view of the setting tool;

Figure/1 is a detail of the spring lock for hold= ing the parts in the position shown in Figure-1,;

Figure .5 is a detail of the ring member provided for holding the slip springs, the setting tool and the shear pin; and

-Figure 6 is a detail of the spring arm of one of the slips.

" Referring to the drawings indetail, numeral I -i designates a mandrel having integrally formed at its small end an open cylinder 2, provided a shear pm which parts shown in the position -a longitudinal bore 4 in the mandrel. Slidingly carried by the inside of the cylinder is a ring member 5 provided with ears 6 which ride along the edges of slot 3; and provided with diametrically opposed holes 1 adapted to receive a shear pinas hereinafter described." The serrated slips 8 are carried against the sides of the mandrel .by spring arms 9, each slip being provided with a spring arm. Each spring arm 9 is arranged to cover a slot 3 and is provided at its lower end 10 with an indented portion I 0 adapted tofit between the ears 6 and with an arcuate element It adapted to abut against the lower edges of the ears 6. The arcuate element is of sufiicient length to extend beyond' both sides of

slot

3 and 15 is carried inside the cylinder whereby the spring arms are held in place between ears 6 and, are

caused to movel with ring member 5.

The mandrel hasat its outer end a cavity l2 provided with shoulder l3 thepurpose of which .20.

as to extend from the 'end of the mandrel to the bottom of cylinder 2. Intermediate its ends barrel-J8 is provided with a circumferential groove 19 adapted to receive bolt 15. The barrel passes through the opening in ring member 5' and is 35 provided with a diametrical bore 20 adapted to align with bores 1 in ring-member 5 and receive a shear pin 2|. At its outer end barrel I8 is provided with a collar 22 adapted to abut against the end of the mandrel and is'exterially threaded 40 f at 23 so as to receive the end of. the tubing.

R With the parts shown in the position shown in Figure. 1 the assembly is lowered into the well at the end of a wire line or a string of tubing which includes conventional; jars. point is reached at which it isdesired to set the stop; the tubing is given an upward -jerk thereby imparting an upward jar to the barrel I8; ,This disengages bolt l5 from groove I 9 and permits the mandrel and cylinder to slide downwardly alongthe barrel whereby the slips move upwardly alo'ngthe mandrel and are pressed outwardly un- .'til they engage the casing. When this occurs the momentum of the mandrel is such as to cause the slips to bite into the walls oi. the casing and hold in said opening. This barrel is of a length such 30 When the- 45 the assembly securely. Then the tubing is given a downward jar which shears ofi pins 2| releasingbarrel 18 from ring member 5. The tubing 'is then withdrawn taking the barrel with it and leaving the stop in place. When it is desired to remove the stop a suitable fishing tool is lowered into the interior of the mandrel, said tool being provided with shoulders to engage shoulder I3. When this engagement is made an upward jerk will release the slips from the casing and permit the assembly to be withdrawn.

It will be understood that the above described device is relied upon only as an illustration of the present invention and not as a definition of the scope of said invention. Various changes in arrangement, and size and shape of parts will be apparent to those. skilled in the art and are con templated the scope of the appended claims in which it is intended to. claim the present invention as broadly as the prior art permits.

We claim: 4

1. A stop adapted to be set at any selected point in 'a casing comprising a mandrel, slips mounted for sliding movement on said mandrel, arms carried by said slips, a barrel arranged within said mandrel, means, releasable by a jar longitudinally applied to said barrel, for securing said barrel to said arms, and means, releasable by an upward jar on said barrel, for. normally holding said barrel in a fixed relation to said mandrel.

2. A stop adapted to be set at any selected point in a casing comprising a mandrel having a central axial passage, a cylinder fixed to one end of said mandrel having its interior coaxial with and communicating with the passage in said mandrel, a ring mounted in said cylinder for movement longitudinally thereof, spring arms carried by said ring, slips carried by said arms and mounted for sliding movement on said mandrel, a barrel arranged in the passage in said mandrel and extending into said cylinder, a shear pin connecting said ring to said barrel, and means releasable by an upward jerk onsaid barrel for normally holding said barrel in a fixed relation to said mandrel.

3. A stop adapted to be set at any selected point in a casing comprising a body portion in-'- cluding a mandrel having its small end terminating in a cylinder the interior of which is coaxial with and communicates with said bore, said'cylinder being of larger diameter than the small a ring member mounted in said cylinder, spaced ears on said ring member adapted to project outwardly through said out out portions and slide along the longitudinal edg'es'thereof, spring arms arranged to travelin said out out portion, notches in one end of each of said spring arms to receive said ears, a slip carried by the other end of each spring arm and adapted to slide on said mandrel, a barrel adapted to be arranged within the bore of said mandrel and extend into said cylinder, a shear pin connecting one end of said barrel with said ring, a threaded nipple on the other end of said barrel, a circumferential groove on said barrel intermediate its ends and a bolt carried by said body normally spring pressed inwardly-to engage said groove and hold said barrel in a fixed relation to said mandrel.

4. A stop adapted to be set at any selected point in' a casing comprising a mandrel, slips mounted for sliding movement on said mandrel, arms carried by said slips, a barrel arranged within said mandrel, and means, releasable by a jar longitudinally applied to said barrel, for securing said barrel to said arms.

5. A stop adapted 'to be set at any selected point in a casing comprising a mandrel having a central axial passage, a cylinder fixed to one end of said mandrel having its interior coaxial with and communicating with the passage in said mandrel, a ring mounted in said cylinder for movement longitudinally thereof, springarms carried by said ring, and slips carried by said arms and mounted for sliding movement on said mandrel.

6. A stop adapted to be set at any selected point in a casing comprising a body portion including a mandrel having its small end terminating in a cylinder, the interior of which is coaxial with and communicates with said'bore, said cylinder being of larger diameter than the small end of said mandrel and having its upper end projecting laterally of said small end, diametrically opposed longitudinal cut-out portions beginning at the top end of said cylinder and extending to a point adjacent the bottom thereof, a.

ring member mounted in said cylinder, spaced ears on said ring member adapted to project outwardly through said cut-out portions and slide along the longitudinal edges thereof, spring arms arranged to travel in said cut-out portion,

notches in one end of each of said spring arms to receive said ears, and a slip carried by the other end of each spring arm and adapted to slide on said mandrel.

NATHAN F. HENDERSON. BENJAMIN J. FESTERVAN.