US1723600A - Well-packing device - Google Patents

Description

Filed Oct. 21, 1925 10 I N VEN TOR.

DAV/o A. CANT A TTORNE Y.

UNITEDv sTA'rssj DAVID A. CANT, OF-LOS ANGELES, CALIFORNIA, ASSIGNOR TO REGAN FORGE & ENGL- NEERING COMPANY, F SAN PEDRO, CALIFORNIA, A CORPORATION 0F CALIFORNIA.

A WELLPACKING DEVICE.

Applicationileni-A October 21, 1925. Serial No. 63,872.

, This invention relates to Vpacker mechanisms for oil Wells, and is articularly adapted for sealingthe space etween the well tubingand casing in order to seal the ,well above y.the oil bearing sands to facili- -tate pumping operations in casethe well does -not natu-'ally' flow, and to further revent the entrance of water or other objectionable luidstthe well during its flow.

to provide-a eomparatively'simple packing at the .desired point. in a casing, and which may. bequickly removed therefrom without the necessity of employing mechanisms orl specialltoels to set the packer in the well or to remove the same therefrom. Briefly the invention` referably .consists cure togetheiggthe ends of the connected members` being' internally. threaded for the .ing sections. Mounted on the tapered mandrel of the upper member is a compressible `2.1; packing `sleeve adapted toengage the wall tion by a split friction ring when the packer,- is lowered into position lin the casing.. As'

. the packer is lowered into the, oil tubingrthe annular flange on the lower member will envent a disengagement of the split friction ring directly beneath the slips. As soon-aspv the packer has reached the point-in the tube where itis desired to pack off, the mech-"- 4 anisrn is drawn upward a short distance. As

the upper split friction ring frictionally" engages the casing it will beapparent (as shown in Fig. 9) on an upward movement of the packer body. *u a further,-

downward movement ofthepacker body the tapered mandrel ofthe lower member will` y, force the slips into positive engagement with It isan important object of the invention device. which may be readily set in position f vsli s inca released position.

of adpair of tubular mem ers detachably se? j reception of 'the threaded ends di the oil tubygage the upper ends of the slips and thus prethe tube, the weight of the tubing above the packer being then released will expand the packing sleeve into fluid tight engagement with the tube. f

Other objects and advantages will become apparent as the description proceeds, reference being had to the accompanying drawing ormiingapart thereof, in. which: Fig. 1 is a central vertical section of the packingv apparatus disposed ih an -oil :tube 1n aninoperative position. "f e5 Fig. 2 is an elevation of the same with the ig; 3 is a. view similar to Fig; 2showing t e packer insealed engagement with the tube. l Fig. 4 is a cross section of on line4--4ofFig; 1. L

Referring to the Vdrawing the packer pref- 'i erably consists of anfupper tubular' member the packer taken 5, and a lower tubular member detachably T I. secured in screw threadedfengagement.

Member 5 is interiorly threadcdat its upper end for enga 'ing the lowen end of a tube v section' 7, an is provided therebelow with ari-exterior annular fianger, the remaining portion ofthe member tapering downwardly toits lower exterio'rly threaded end. The'v tapered portion of this member constitutesy a mandrelforthe reception of a tubular packing `sleeve`9 formed ofrubber or other 155 compressible material, being held in position thereonv by meansof a' nut l0 which is in screw threaded engagement with the upper. ends of the lower member 6, the ends of the packinv'sleeve bearin against the bevelled 90 edge oft, the nut 10 and the {ia-nge 8. In order to maintain the upper and lower members together, and at the same time permit of a i "A, member 6 is cone shaped in order to force the the saine will remain stationary and thus" release the spring lingers carrying the slips.

slips into engagement with the interior sur face of the tubing when the packer is operated as-will be explained in detail further on.

Directly below the tapered portion 13 of 105 the lower member 6, is a cylindrical sleeve 14, internally threaded for the reception of .the upper end of the drill tube section 15 when the packer is mounted'between the drill tube sections. Disposed on section of the drill tube is a slip carrying mechanism 16, which preferably consists of a sleeve 17 of smaller diameter than the interior ofthe casing 18. This sleeve is provided lon'.its exterior surface with an annular groove 19 in which is y mounted a split friction ring20. Secured to the upper ort-ion of sleeve 17 are two pairs of spring ngers 21, 22, each pair being oppositelydisposed, and secured to each of their upper ends are slip members 23-of usual form', that is to say their outer faces are provided with serrations 2d in order that they may frictionally engage the interior A surface of the casing when operated and hold the packerbody so that their upper` ends i are engaged by the sleeve 14 formed at the base of the tapered vportion of the lower member, and out of contact with the'wall of the oil tube.

Whenit is desired to remove the packer f mechanism 'from the casing, 'all that it is necessary to do is to exert an upward pull on the tubing, the split-friction rings holding the sleeve carrying' the slips stationary until the mandrel portion of the packer has moved out of engagement with the slips, the

lower collar 26 on the tube below the sleeve then engaging the sleeve and slips and carry-v ing the same upwardly with the packer.

By means ofthe above construction it will be possible to quickly -mount the packer within thewell, and to remove the same therefrom, without. employing extraneous apparatus or tools of any description.

lrVhat I claim is:

-A well packing mechanism comprising a pair of upper' and lower tubular members detachably secured together in movable relation to each other, an expansible packing sleeve surrounding the upper member, the lower member constituting a slip operating and packin sleeve com ressing member, the lower mem er adapte to engage a lower string of oil tubing, a sleeve carryin a splitfriction ring loosely mounted on sai tubing,

.a plurality of upwardly extending spring arms secured to said sleeve, each of said arms being provided on its upper end with a casing engaging slip, and a split friction ring surrounding -said spring arms and normally holding the slips out of engagement with the casing, whereby when the packer has been lowered into the well casing the friction rings will ,engage the casing wall on an upward movement of the packer to release the slips, and on a downward movement the lower member will wedge the sli s against the casing and expand the pac ing into fluid tight engagement therewith.

In witness that I claim the foregoing I have hereunto subscribed my name this 1st day of September, 1925.

' DAVID A. CANT.4

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