US1586968A - Deflector for slip-actuating weights - Google Patents

Description

June 1 1926.

C.$.CHCKMER DEFLECTOR FOR SLIP ACTUATING WEIGHTS Filed April 15. 1925 Patented June 1, 1926.-

UNITED STATES tssaees arser series.

CHARLES s. CRIGKMER, or DALLAS, TEXAS, assrsivon T0 rein eunansson eosronA- TION, or DALLAS, TEXAS, A conroan'rron or DELAWARE.

DEFLECTOR FOR, SLIP-AQTUATING YVEEGHTS.

Application filed April 13, 1925- -Sei'ia1 No. 22,721.

This invention relates to new and useful improvements in deflectors for slip actuating weights.

The object of the invention is to provide a deflector for slip actuating weights for tubing catchers, casing spears and the like.

A particular object of the invention is to provide a deflector held in fixed relation to the lower end of a slip actuating weight for preventing unintentional upward displacement of the weight, due to impact or pressure resistance when lowering the device into the well.

A further object is to apply such deflector to the device without enclosing the weightsustaining spring and thereby avoiding a sand trap.

A particular object of the invention is to support the deflector at a point adjacent the bottom of the weight froma point above the weight.

A construction designed to carry out the invention will be hereinafter described to gether with other features of the invention,

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown, and wherein Fig. 1 is an elevation of a tubing catcher equipped with a deflector constructed in accordance with my invention,

Fig. 2 is an enlarged cross-sectional view on the line 22 of Fig. 1,

Fig. 3 is an enlarged cross-sectional view on the line 33 of Fig. 1,

Fig. 4 is an enlarged cross-sectional view on the line 4t l of Fi 1, and i Fig. 5 is a sectional view of the deflector collar. r

i In the drawings the numeral 10 designates the head of an ordinary tubing catcher such as is now in common use and of the'type shown in Letters Patent No. 1,218,549 issued to Samuel A. Guiberson, Jr, March 6th, 1917; and while I have chosen such a device with which to illustrate my invention, it is to be understood that it may be applied to any tool or device of this character or in which a slip actuating weight is used. The head is adapted to screw onto the tubing 11. This head is mounted on a section of tubing 12 and is formed with upwardly and outwardly inclined flat faces, 13. Dore tail guide ribs 1 1*. are formed centrally and longitudinally of the faces.

At the base of each face is a radial lip 15. On eachguide rib is mounted a gripper slip 16 so as to slide vertically on the face 13. Each slip has a link 1-? pivoted to its lower end and depending through a slot 18 in the lug atthe bottom of the face. A cylindrh cal weight 19 loosely surrounds the tubing section 12 and rests at its lower end upon a coiled compression spring 20.

The spring rests upon a collar 21 at the lower end of the tubing section 12 by which the catcher is attached to the lower tubing 22. At its upper end the weight has a pair of spaced ears 23 for each link 17 and between which the lower end of the link is pivoted.

The slips have teeth on their outer surfaces and when the weight 19 is moved upwardly the slips are also moved upwardly on the faces 13 and guides 14 and are thus displaced outwardly into gripping position. The parts which have been previously described are well known and 'in common use.

It will be seen that in lowering the catcher into a well casing, an impact sustained by the lower end of the weight 19, such as a sudden contact with a'body of oil or the resistance offered by the upward flow of a heavy gas pressure, would force the weight. upwardly and raise and spread the slip thus causing the catcher to unintentionally grip the casing'and interfere with its downward passage.

vide a deflector comprising an annular col-' lar 24 having a bore 25 sufliciently large to permit the spring 20 to slide freely therethrough. The bottom of the collar is rounded so as to offer less resistance to fluids and liquids.

Hanger bars 26 have their upper ends countersunk in the sumps of the head 10 and fastened by screws 27 between the lugs 15. These bars pass through recesses or grooves 28 in the surface of the weight and have their lower ends countersunk in the periphcry of the collar 24: and fastened by screws 29. The collar is thus held in fixed relation to the weight.

It will be noted that the collar is larger in diameter than the weight, although the difference may be but a fraction of an inch, with satisfactory results. The collar being larger in diameter deflects an upward fluid pressure from the sides and bottom of the weight. The upper surface of the collar is dished at 30 to receive the lower bevelled end of the weight and drainage through the collar is thus assured.-

lVhen the catcher is connected in the tub ing it the latter should break above the catcher the inertia of the weight 19, accentuated by the tendency of the spring 20 to expand owing to the normal compression by said weight, will cause the weight to maintain its position or remain momentarily stationary in the casing. The head 10 and tubing section 12, however, being attached to the line of tubing will tend to descend more rapidly; consequently the links 17 being sustained by the inert weight will support the slips 16 and the latter will be thrown outward by the inclined faces 13 and guides 14:, when the head moves downward. The teeth of the slips being sharp and hard will readily bite into the casing and hold the catcher against a further drop.

It will be seen that the weight is free to operate as the grooves 28 are sufliciently large to preclude binding on the hanger bars 26. The deflector collar will protect the weight, but will not interfere with the operation thereof. The deflector bars and collar being of a larger diameter than the weight, will act as a guide thus protecting the weight from contact with the walls of the casing.

Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of the appended claims.

lVhat I claim, is

1. The combination with a slip actuated weight and the tubular conductor of a tubing catcher, of an annular deflector collar surrounding and free from said conductor, a support extending upwardly from said collar for holding the same immovable, the top of the collar being contiguous to the lower end of the weight and open to permit a lateral passage of sand and fluid between the weight and collar.

2. The combination with a slip actuating weight, of a hang-er depending longitudinally of the weight, and a deflector element carried by the hanger and extending under the weight.

3. The combination with the head of a tubing catcher and the spring supported slip actuating weight, of hanger bars depending from the head and extending down the sides of the weight, and an annular deflector collar under the bottom of the weight attached to the hanger bars.

4. The combination with the head of a tubing catcher, the tubing section thereof, the sustaining spring surrounding the tubing section, of a slip actuating weight sustained by the spring and mounted to. slide on the tubing section, said weight having vertical grooves, hanger bars depending from the head and extending through the grooves of the weight, and an annular deflecting collar surrounding the spring under the weight and immovably supported by the bars.

5. The combination with the head of a tubing catcher, the tubing section thereof, the sustaining spring surrounding the tubing section, of a slip actuating weight sustained by the spring and mounted to slide on the tubing section, said weight having vertical grooves, hanger bars depending from the head and extending through the grooves of the weight, and an annular deflecting collar surrounding the spring under the weight and immovably supported by the bars, the bars extending radially from weight and the collar being larger in diameter than the weight, whereby the bars and collar provide a guide enclosing the weight.

6. A deflector for a slip actuating weight comprisin an annular deflecting collar, and .a plurality of spaced supporting members extending upwardly from the collar.

7. A deflector for a slip actuated weight comprising, an annular collar having a rounded bottom and an open dished top, and an upwardly extending support for the collar.

8. A deflector for a slip actuating weight comprising, an annular collar having a rounded bottom and a dished top, and a plurality of upwardly extending hanger bars attached at the lower .ends to the collar, open to expose the weight above the collar.

In testimony whereof I aflix my signature.

CHARLES S. CRICKMER.

Images