US1693039A - Blow-out device for oil wells - Google Patents

Description

Nov. 27, 1928.

B. S. MINOR BLOW-OUT DEVICE FOR OIL WELLS Filed June y 9, 192e 2 Sheets-Sheet 1 All ' Nov.. 27, 192s. 1,693,039

B. S. MINOR BLOW-OUT DEVICE FOR OIL WELLS Filed,l June s. 196 2 sheets-sheet 2 ATTORNEY.

` Patented Nov. 211.1928.

-UNITED sixrias `MTENT OFFICE.

mm1' s. MINOR, OrisAN Panno, CALIFORNIA, 'Assieiroa'ro REGAN. FORGE a ENGI- NEERING COMPANY, F SAN PEDRO,l

FOBNIA. i

. animation med June 9,

This invention relates to a packing mechaf' nism for packing olf tubular oil well members within a casin head. J

In oil well operations it oftentimes becomes necessary to pack olf well casing, drill pipe, oil well tubing, and the like, when the tribular pipes become stuck in the well and the operators are unable to move the same upwardly or downwardly to release then 1. It

has beenthe practice under such conditlons to pump water, oil, or semi-fluid mud of a light consistency into the well to loosen the member. Such operations while generally satisfactory in the accomplishment of the loosening operation, are sometimes vfraught with considerable danger from unexpected blow-outs, due mainly to a dilution of the heavymud laden water that is generally employedin drilling operations' to restrain the gas and oil pressures. Further, W'henit is undesirable to move oil well tubing or casingthat has become frozen, especially` when pumping oil, water or light mud laden water to loosen the same, the' detachable packing member may be quickly introduced within the head around thev tubular member to pack the same in gas tight relation thereto, and thus. lcontrol unexpected blow-outs, again when the oil tube, casing, drill pipe or kelly becomes' frozen (stuck or sanded up) a slight vertical movement will oftentimes enable the drillers to shake loose, especially when such operations are accompanied by a circulation of a luid,`butas heretofore noted such circu-l lations oftentimes'are accompanied by unexpected blow-Outs. '1

By the employment of my improved blowout device oil well tubing, casing, drill stem or similar tubular members may be quickly packed of within the head, or the packing member may be expanded to such an extent that the members maybe moved frictionally with-in the paokin member,h and thus minimize the danger O blow-outslaf slight turn of the acking expanding memberusually being su cient to tightly packthe member to l the head.

It is therefore an/important object of my invention to provide a casing head packing mechanism, whereby it will be possible toop-y CALIFORNIA, A CORPOBATI N 0F CALI- BLOW-OUT DEVICE FOR OIL WELLS. v

1926. Serial No. 114,804.

erate various tubular members within a well without interference therefrom, and in which the expansible packing member may be readily introduced therein when it is desired to pack the member in fluid tight engagement in the well.

Further objects and advantages will become apparent as the description proceeds, reference being had to the accompanying drawings inwhich Y Fig. 1 is a central vertical section of the'. device attached to the upper end of a string of well casing, the packing mechanism. being in .an unexpanded position. .l

Fig. 2 is a similar view showing the pack- 8.5 ing mechanism expanded to'pack the tubular member mounted therein.

Fig. 3 isa top plan view showing the packing mechanism locked in the casing head.

Fig. 4: is a top planl view showing lthe packing mechanism in an unlocked position.

Fig. 5 is atransverse section taken on line 5&5, of Fig. 1, looking in the direction indicated by the arrows thereon;

Fig. 6 is a transverse section taken on line 6 6 of Fig. 1, looking in the direction indicated by arrows. l

Fig. 7 is al central vertical section through the casing head showin the relation of the guide lugs on the locking ring to the lug seats on the casing head.

Fig. 8 is a side elevation of the detachable l threaded rin member of the packing expanding mec ianism.

Fig. 9 is a side elevation of the packing mechanism showing the hinge construction.

' Fig. 10 is a plan View` of the same. f

Fig. 11 is a sectional detail of the locking ring Operating and retaining means.

In an embodiment of the invention herein disclosed 10 designates a tubular casing head. provided with the usual vented openings 11, A12, adaptedto be secured to the upper end of a string of well casing. Above the vents is formed an annular bevelled seat 13, for the 95' reception of the expansible packing ring cony struction that will be more. fully described hereinafter. The upper end of the casing head around its circular edge is. provided with a plurality of outwardly extending seg- 100 mental lugs 15, equally spaced apa-rt adapted to be engaged by similar inwardly projecting v'lugs 16, formed'on the circular flange 17, of

a fiat detachable locking ring 18. 'Ihe lugs 16 pass between the lugs 15 on the casing head when the ring is secured thereon, and as the lugs/16am disposed below the plane of the lugs 15'it will be apparent that when the ring is rotated to bring its lugs into register with the lugs on the Casing that the ring will be locked against vertical movement. Formed around the inner circular edge o f locking ring 18 are a plurality of segmental lugs 19 equally spaced apart designed to engage, when the ring 18 is rotated to locked position, V

26 and a lower metal ring 27, each formed of' a pair of substantially semi-circular members 28, 29, -30, 31 respectively. The oppositely disposed faces of both rings are convexed and engage the concaved faces of a packing ring 35formed of an expansible material, such as rubber, and consisting of two semcirc'ular members, as shown in Fig. 6', all the members of the packing ring are secured together by means of bolts 36 whose threaded ends engage the threaded apertures kformed in the members 28, 29, of the upper metal ring 26,"and as the bores of the expansible ring 35, and lower ring 27 are of greater diameters than the bolts, it will be clearithat on avdownward pressurev on the ring construction that the expansible member will be expanded laterally. Bolt 37 passes through an aperture in oneend of ring segment 31, and engages a threaded aperture in one end of ring segment 28 in order that the members of all ring section may be swung apart on the pivoted bolt 37, as shown in dotted' lines in Fig.

10, to engage a tubular object, such as an oil tube 38 that may be suspended within the well and casing head.

In order to expand the packing ring into a "fluid tight engagement with the casing head and the oil pipe 38 or other tubular object, a

I' short sleeve 40 having an exteriorly threaded I lowerend is provided. This sleeve engages the internally threaded ring 2l, its lower end engaging the upper surface of the metal ring member 26 of the expansible packing con,

struction, whereby When the sleeve 40 is roytated downwardly by means of the handles 41 secured thereto the split expansible ring 35 ,will be expanded laterally into uid tight engagement with the interior surface` of the s heretofore noted in the brief descrip-A tion7 of the invention, the packing ring may be expanded to any desired degree from a slight frictional engagementwith the oil tubing to an expansible packing fit. As the internal diameter of the sleeve 40 is the same as thel inner diameter of the casing it will be possible to freely utilize drilling tools within the well by simply removing the split packingtring construction, this operation being accomplishedby simply rotating the lugs `of the-locking ring 18 out of engagement'with the lugs `ofthe internally threaded ring. fThe ring-and the sleeve 40 attached thereto may then be raised vertically and the expansible packing ring'may then be easily removed from the head. Y

In order to facilitate rotary movements of the locking ring 18 and the threaded sleeve 40, each are provided with a pair of operating handles ell, 42, respectively. The inner ends 43 of handles 42 project beyond the inner 1 peripheral surface of the flange 17 of the locking ring-18, and engage apair of the lugs 15 on the casing head when the ring is rotated to an unlocked position to prevent an accidental detachment of the ring from the head when the packing ring construction is withdrawn therefrom.

The lugs 44 having inclined surfaces that are formed on the upper surface of the locking ring are designedto guide the lugs 20 on the threaded ring 21 into their seats 22 when mto the casing head.

What I ,claim is: l. In a blow out device for oil wells, a

lvented casing head member adapted to be detachably secured to the upper end of a well casing, a Vpacking. ring seated in the head above the vented openings, an internally threaded ring seated in the head above the packingring, means formed on said ring for preventing a rotary movement of the saine an externally. threaded sleeve engaging the threaded 'ring and bearing against the pack- -ing ring toexpand the same laterally, and a locking ringsecured to the headfto maintain the threaded ring against vertical movement. 2.v In the blow out device for oil wells, a

the packing expanded mechanism is lo'wered.

vented casing head member adapted to be casing, said casing head shaving an internal seat directly above thevented Openings, a packing 'rlng disposed on the internal seat 'detachably secured to the upper end of a Well 100 of the packing head, the upper internal wall of said casing head being provided with a plurality ,of V-shaped seats, an internally threaded ring having a plurality of V-shapped lugs on its peripheralsurface adaptedto engage the V-shaped seats of the packing head, whereby to prevent rotation of the threaded ring, an externally threaded sleeve engaging the threaded ring` and bearing against the packing ring to expand the same laterally, and a locking ring secured to the head to l'ock the threaded ring against vertical movement,

the upper surface of the locking ring being provided with a plurality of' inverted vV- shaped lugsI for guiding the lugs on the casing head when assembling the packing expandingmechanism.

In witness that I claim the foregoin I have hereunto subscribed my name this lOt 4day of May, ,1926.

BURT S. MINOR.

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