US1035674A - Cement-retainer. - Google Patents

Description

R. C. BAKER.

CEMENT RETAINER.

APPLIoATIoN Hum .11.11.29, 1912.

Patented Aug. 13,1912.

Inventor Witn'esses Attorneys Ualemania c. BAKER, oF-GOALINQA. CALIFORNIA.

CEMENT-RETAINER.

Specification of Letters Iatent.

Patented Aug. 13,1912.

w. yApplication Sled January 29, 1918. Serial No. 674,065.

To aZL wiz-om t may concern.'

Be it known that I, Rennen C.'- BAKER, a citizen of the `United-States, residing at Coalinga, inthe county of Fresno and State of California, have-mvented a new and useful Cement-Retainer, of which the-'following is a specification. n

'By way ofV explanation, 1t:-may he stated that in the operation of drilling and-prpmg a Well, the tubing .occasionally becomes lodged inthe bore, before-the bore. has. been tubed tothe bottom, under such circumstances, the tubing may .be flooded by water derived from an' intermediate source, and not from the bottom of the well, presupposing that the well-has been sunk for the urposeof obtaining water from a lower evel than that at which 'the water enters. Under such circumstancesV it is necessary to seal the space between the tubing and the bore of the well, and to that Iend, cement must be introduced between the tubing and the bore.

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 1n the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of invention herein disclosed can be made within the scope of what is claimed without depart-ing from the spirit of the invention.

In the drawings,-Figure 1 shows in longitudinal section, a device constructed in accordance with the present invention, the same being located wlthin the Well tubin the view depicting the parts as they Wil appear previous to the elevation of the barrel; Fig. 2 is a similar view, showing the barrel elevated and the cement in posltion about the 'barrel; and Fig. 3 is a transverse section upon the line 3-3 of Fig. 1.

In carrying out the invention there is provided a barrel 1 closed at the lower end, as shown at 2. The lower extremity of the barrel 1 flares, as shown at 3. A closure 4 is provided for the upper end of the barrel 1, the closure 4 consisting of a top plate 5 and a flange V6, the liange 6 being right-hand threaded into the barrel 1. The top plate 5 projects beyond the eriphery of the barrel 1. Left-hand threa ed as shown at 7, into the topplate 5 of the closure 4, is a supply pipe 8. .Surrounding the barrel 1 is an inner conlcal sleeve 9, and surrounding the mner conical sleeve 9 is an outer conical sleeve 10. The base of the sleeve 9 is downwardly disposed, and the base of the sleeve 10 1s upwardly disposed, the inner and outer faces of the sleeves9 and 10, respectively, belnga proximately parallel, while the adjacent aces of the sleeves 9 and 10 engage wedge-wlse, as shown at 11. The outer face of the outer sleeve 10 is provided with a series of ribs or projections 12. A yieldable, and preferably resilient, annular packing 14 surrounds the barrel 1.

1 In practical operation, the parts are positioned as shown in Fig. 1, the sleeves 9 and'l() being disposed beneath, and engaged by, thek top plate 5 of the closure 4. The packing ring 14 surrounds the cylindrical portion of the barrel 1, above the flaring portion' 3l thereof. The device is lowered within the tubing 15, to the desired point, whereupon the barrel 1 is raised, by means of the tubing or pipe 8, as shown in Fig. 2. The upward movement of the barrel 1 will cause the inner conical member 9 to force the outer conical member 10 outwardly, so that the projections 12 thereof will engage with the tubing 15, it being noted that the outer conical member 10 is yieldable, this result being ac uired, when desired, by splitting the mem er 10, as shown at 16. As the barrel 1 moves upwardly, within the inner conical member 9, to cause the outer conical member 10 to expand radially, as hereinbefore described, the tubular packing 14 will be pressed against the butt end of the conical member 9, and the flarin end 3 of the barrel 1 will enter the packlng 14, expanding the same against the tubing 15, and effecting a closure between the barrel 1 and the tubing 15.

When the parts are positioned as hereinbefore described, the cement, preferably in the form of a thin grout is forced downwardly through the supply pipe 8, into the against thebot-tom 2 of the barrel, and atV the other end bearing against a suitable head 22, outstanding from the stem portion 2O of the valve in which spring 2l the valve stem is slidable. The valve head 19 closes toward the supply pipe 8, and obviously permitsl the cement to pass down'- wardly through the device, without permitting the cement to pass in an opposite direct-ion. When the cement is hardened suficiently, the supply pipe 18 is unthreaded from the closure. 4.\ The device is preferably fashioned from cast iron, and conseuently may be drilled out readily when esired.

It will be readily understood that should it be desired to close the tubing 15, above the barrel l, a mass of cement may be deposited upon top of the closure 4. This operation is peculiarly desirable when, as is often the case, there exists at the bottom of the well gas, rapidly owing water or the like, preventing a proper hardening of the cement, when the same is deposited at the bottom of the tubing, as shown in Fig. 2.

Having thus described the invention, what is claimed is 1. In a device of the class described, a barrel provided at its lower end with a downwardly flared portion; coperating inner and outer wedges upon the outside of the barrel, the outer wedge having its wider end disposed upwardly and the inner wedge having its wider end disposed downwardly; and a resilient packing surrounding the barrel; the inner wedge being actuatable by the barrel, when the barrel is lifted, to eX- pand the outerwedge radiall of the barrel, and to causethe wider en of the inner,

barrel; a supply pipe entering the top of the barrel; a valve in the bottom of the barrel, opening away from the supply pipe; and mechanism upon the outside of the barrel and operable when the barrel is moved by means of the supply pipe to effect a sealing of the space surrounding the barrel.

3. In a device of thepclassA described, a barrel provided with a flaring lower end; a supply pipe entering the top of the barrel; a valve in the bottom of the barrel, opening away from the supply pipe; inner and outer conical sleeves surrounding the barrel; a yieldable packing surrounding the barrel; the barrel being liftable, by means of the supply pipe, to cause the inner sleeve to expand the outer sleeve radially, and to cause the inner sleeve to engage the packing, to force the packing upon the flared end of the barrel, thereby to expand the packing radially.

In testimony that `I claim the foregoing as my own, I have hereto aixed my signature in the presence of two witnesses.

REUBEN C. BAKER.

Witnesses:

J. A. STEELE, W. L. HAZEN.

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