US1140789A - Anchor for well-tubing. - Google Patents

Description

-R C. BAKER.

ANCHOR FOR WELL TUBING.

APPLICATION FILED Aue. I2. I9I4.

Witesses Z by f Attorneys.a

rara.

REUBEN C. BAKER, OF COLING'A, CALIFORNIA.

ANCHOR. roe WELL-TUBING.

madres.

pecication of Letters Patent.

Patenten May a5, reis.

Application led August 12, 1914. Serial No. 856,458.

One of the objects of the present invenl tion is to provide means whereby a tube can be securely anchored within a well casing.

either above or below the pump so that, should the tube become broken or detached,

' there will be no danger of the same falling into the well.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of .the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

ln said drawings: Figure 1 is an elevation of the anchoring means in position upon a tube while being lowered into a well casing, the casing being shown in section. Fig. 2 is a section on line A-B Fig. 1, showing the relative positions of the parts after the anchoring means. has been forced into engagement with the casing so as to support the tube. Fig. 3 is an elevation of a portion of j the anchor and showing certain of the parts adjusted relative to each other to an' intermediate position. Fig. 4 is a section on line A-B Fig. 2. Fig. 5 is a section on line C-D Fig. 2.

Referring to the figures by characters of reference 1 designates a well casing and 2 designates a portion of the tubing therein. Mounted onthis tubing is a conical spreader 3 provided, at its upper or large end with an annular flange 4-. constituting a stop and,

if desired, one or more channels 5 may be formed in the large. end of the spreader so as to permit air or liquid to How 4readily past the spreader which, as' shown lin the drawings, extends close to the wall of the casing 1.

Slidably mounted on the tubing 2 below thespreader 3 is a sleeve 6 provided with a bayonet slot 7, there being oppositely disposed spring strips 8 secured to the upper end portion of the sleeve and provided, at

their upper ends, with gripping jaws 9 substantially wedge-shaped, the outer faces of the jaws being toothed as shown. Retarding springs 10 are secured to the upper portion of the sleeve 6 and are disposed betweenthe springs 8, these retarding springs being preferably bowed as shown and adapted to press outwardly against the casing 1. A ring 11 is screwed upon the upper portion of the sleeve 6, thus to form a collar and this ring has spaced apertures 12.

A stud 13 extends radially from the tubing 2 and projects into the slot7, the outer end portion of this stud being engaged. by one side of a lever14 which is pivotally mounted, at its lower end, upon the sleeve 6, as shown at 15 and has an intermediate offset portion 16. A collar 17 is slidably mounted on the sleeve 6 and is provided with an interior groove 18 within which the lever 14- rests. This collar 17 has spaced openings 19 which are out of alinement with the openings 12.

Under normal conditions, the collar 17 is seated upon the lower end portion of the sleeve 6, as shown in Fig.- 1 and the stud 13 is seated in the offset upper end portion of the slot 7. Consequently the jaws 9 are in their lowered positions relative to the spreader 3 and the springs 8 serve to press the jaws inwardly toward the tubing 2 where they will not engage the inner sur-` face of the casing 1. When the tubing is lowered into the casing 1, the springs 1 sliding along the inner surface of the ca ing will tend to retard the downward movement of the sleeve 6 but as the stud 13 is seated in the offset portion of the slot 7, the sleeve will be caused to move downwardly with the tubing. When the tubing has been of the casing. If, during the lowering of.

the tubing, said tubing should become accidentally released and start to drop within the casing 1, the pressure of the trapped air or liquid against the lower collar 17, will tend to retard the downward movement of said collar so that asthe lever llpasses downwardly relative thereto, it will be swungy laterally about its pivot 15, this throwing the stud 13 out of the offset portion of slot 7 and permitting the entire sleeve 6 to remain practically stationary while the tube is descending a short dis-- tance, this distance being sufcient to cause the spreader 3 to engage the jaws 9 and shift them radially against the casing 1. Consequently the descent of the tubing within the casing will be brought to a stop, the collar 17 ultimately" arriving against or close to the collar 11, as shown in Fig. 2, at which time the escape of air or liquid through the openings 12 and 19 is practically shut off and a suitable cushioning action obtained by reason of the trapped air or liquid thereunder. The collar 17 although slidably mounted on the sleeve 6, cannot rotate relative thereto because of a guide stud 20 which extends inwardly from the collar and slides within a slot 21 formed longitudinally within the sleeve.

What is claimed is 1. The combination with a tubing section, of an anchor including a spreading element secured to the section, casing engaging members slidable relative to the tubing section and adapted to be engaged and shifted by the spreading element, means for holding said members against movement longitudinally of the section, and means operated by the upward pressure against the anchor during its rapid descent, for releasing the jaws to permit relative movement of the spreading element and the jaws thereby to shift the jaws to casing engaging position.

2. The combination with a tubing section, of an anchor including a spreading element secured to .the section, a member slidably mounted on the tubing section, casing engaging devices flexibly connected to the said member, means upon said member for fric-- tionally engaging a casing tno retard the descent of the member, coperating means upon said member and the tubing section for holding the member against longitudinal movetion and sleeve against relative movement,

casing engaging jaws flexibly connected to the sleeve and normally below and in the path of the spreading element, and means operated by upward pressure against the anchor during the rapid descent of the anchor within a casing, for releasing the sleeve from the tubing section thereby to permit downward movement of the tubing` section and the spreading element relative to the sleeve and jaws.

4. The combination with a tubing section, of an anchor including a conical spreading element xedly connected to the section, a sleeve slidably and revolubly mounted on the section, means upon the sleeve for engaging a well casing to retard the descent of the sleeve, coperating means upon the lsection and sleeve for holding said sleeve against longitudinal movement relative to the section, jaws flexibly connected to the sleeve .and below and in the path of the spreading element, said jaws being shiftable outwardly by the spreading element into engagement with the well casing, and means operated by upward pressure against the x anchor during the rapid descent thereof,

for producing relative rotation of the. tubing 1 section and sleeve thereby to release the sleeve from the tubing and permit independent longitudinal movement of the tubing section relative to the sleeve.

5. The combination with a tubing section, j of anchoring means including a conical spreader ixedly connected to the tubing section, a sleeve slidably and revolubly mounted on the section, jaws below and in the path of the spreader and iiexibly connected to the sleeve, means upon the sleeve for frictionally engaging the inner side of a casing, there being an angular slot within l the sleeve, means upon the tubing section andshiftable into the slot to hold the sleeve and tubing section against independent longitudinal movement, a lever fulcrumed upon the sleeve, a collar slidably mounted on the sleeve and engaging the lever, said lever being normally positioned outI of parallel with the sleeve, means for holding the collar menge@ ,g

against rotation upon the sleeve, said sleeve In testimony that claim the foregoing as being shiftable by upward pressure theremy own, l have hereto aixed my signature against to actuate the lever and produce in the presence of two witnesses.

relative rotation of the sleeve and tubing BEEN C. BAKER. i 5 section, thereby to djsengage the sleeve from Witnesses:

the tubing section and permit the descent of H. R. Cnoznnz,

the spreader relative to the jaws. Y J. W.. LANDER.

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