US2154308A - Cement sprayer - Google Patents

Description

I. R. HENDERSON April 11, 1939.

I CEMENT SPRAYER Filed April 16, 1938 2 Sheets-Sheet 1 I filfeiuiei son INVENTOR. h

BY I] ATTORNEYS.

. April 11, 1939. l, R. HENDERSON CEMENT SPRAYER 2 Shets-Shet 2 Filed April 16, 1938 J. jifie zdeflsom I IN VEN TOR.

A TTORNEYS.

I are tools used by the well drilling against the walls of wells'at points ence I designates the v; longitudinal recess 3 is '55 Patented Apr. 11, #1939 UNITED STATES PATENT orrljca 23212... ..;;:1:$;.;':;'i;?tti;l..i.tfi;.. 4 Claims. (cl. 168-19) This invention relates to cement sprayers which industry for fluid cement where there is a tendency to cave, thereby reinforcing the wall.

Various means for this purpose has been devised but have generally been objectionable because the/ force of the discharging stream or streams of liquid cement has tended to bore into the walls and break them down faster than the healing or solidifying effect of thecement could be. attained.

Tools heretofore used have also been objection- I able because it has been diflicult to release the cement at the proper point or points.

An object of the present invention is to provide a simple and eiiicient tool which can be loweredreadily to a predetermined point and, while being supported at said point, can be actuated to release the liquid cement.

A further object is to provide a tool which will deliver the liquid in a. conical sheet which is unbroken and serves to engage the wall throughout its circumference, thereby avoiding the objectionable results where the liquid is delivered in jets against the wall.

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 an'din the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein described, may 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.

In said drawings:

Figure l is aside elevational view.

I Figure 2 is a vertical longitudinal section therethrough, the valve being shown locked in closed position. 1

Figure 3 is asimilar view showing the valve .open and liquid being sprayed therefrom.

. Figure 4 is an enlarged section on line 4-4 of Figure 2. V 1

Figure 5 is an enlarged section on line 5-5 of Figure 2;

- Referring to the figures by characters of refer-' head of the tool which is and has a reduced neck' upwardly therefrom.. A' formed in this head and in the neck portion and has an inlet opening 4 the purpose of directing films of referably cylindrical portion '2 extending v. beveled, as shown at 22.

. of the head. The lower end of 25 while its lower end portion is in thewall thereof for the reception of a plug 5 adapted to slide longitudinally within the recess 3. This plug has a tapered opening 9 extending therethrough and seated therein is the end portion I of an operating cable 8, being held in the plug by means of Babbitt metal or the like indicated generally at 9.

As the upper end of the recess 3 is reduced'in 7 diameter to provide an annular shoulder IIL'said shoulder constitutes a stop for limiting the rela- 10 tive sliding movement of the plug 5 and the,

head I.

Extending downwardly from recess 3 through the bottom of head I is a bore II, the upper portion of which is enlarged or counterbored as at I2. A radial passage I3 opens into this counterbore from the outer side of the head and is intersected by a longitudinal guide channel I4 in the outer surface of the body.

A tripping slide I5 is mounted in this channel and has a groove I6 in one side thereof in which is seated a stop screw I1 which is fastened to. the head I and serves to hold the cover strip II in the channel I4. This cover strip terminates at the shoulder I8 formed by head I at the base of neck 2 but the tripping slide I5 extends beyond this shoulder and normally projects above the neck as shown in Figures 1 and 2.

The lower end of the tripping slide I5 is formed with a downwardly and inwardly beveled deflecti'ng surface I9 and this lower end portion of the slide is adapted to extend through a slot 20 formed within a latch 2| which is slida'ble in the radial opening I3. One wall of the slot 20 is so proportioned that when the beveled face I9 of the slide is located in slot 20, the beveled face 22 of the slot 20 can be moved inwardly against face I9 a suflicient distance to allow the inner end of the latch 2I to extend into the bore I2 as shown in Figure 2.

A tubular casing 23 of any suitable length is secured to and extended downwardly from the head I,. this casing being formed preferably of a metal tube, the upper end around and is fastened to the lower end portion the tubular casing 23 extends around and is secured to a sleeve 24 the upper end of which is preferably flared as at 26 to form a valve seat.

An opening 21 is formed in casing 23 near its upper end. Slidably mounted in the bore I I is a valve stem 28 having a cylindrical head 29 at its upper end which is slidable incounter-b'ore I 2 55 said end portion 5 Slot 20 and slide I5 are 35 of which extends also flared as at and has an annular groove 30. To the lower end seat 26, said valve being also formed with a cylindrical portion 33 above the conical surface which will seat snugly-in the sleeve 24.

The parts are so proportioned that when the valve 3| is fltted against its seat 26 so as to close the lower end of sleeve 24', the annular groove 30 in head 29 is located to receive the latch 2| so that the valve is thus held in closed position. Before the latch can be moved into the groove it is of course necessary to thrust the tripping slide l5 upwardly 'to the position shown in Figure 2.

A weight 34 is slidably mounted on the cable 8 but is normally raised off of the tool herein described.

In practice a fluid mixture of cement and water is poured into the casing 23 through the opening 21 after the valve 3| has been locked in closed position. The tool is then lowered into the well W until its lower end is brought to a position where there is a tendency to cave. Thetool is then held suspended at this point after which the weight 34 is released and permitted to slide downwardlyalong the line 8 until it comes against the tripping strip I5. Impact against this strip will cause the strip to slide downwardly so that its deflecting surface I9 will thrust against the inclined wall 22 of latch 2 I Consequently the latch will be thrust radially from the counterbore l2 and out of the annular groove 30. This will result in the release of stem 28 and the weight of the supported fluid will cause valve 3| to move downwardly to open position. Thus there will be formed an annular conical outlet and the supported liquid will instantly flow outwardly in a conical sheet against the adjacent portions of the. wall of the well which will be thoroughly sprayed.

After all of the contents of the tool have been discharged, the tool is raised from the well, the valve reseated and locked, and another charge of liquid placed in. the casing 23. The tool is then ready to be again used in a manner heretofore described.

Importance is attached to the fact that the liquid is delivered from the tool in an unbroken conical sheet which serves thus to be distributed throughout the circumference of the adjacent portion of the well wall. Thus there is no tendency of the discharging liquid to tear down the wall, as would be the case if the liquid be delivered in jets.

What is claimed is:

1. A cement sprayer including a casing having a conical valve seat at its-lower end, a conical valve cooperating with the seat to retain a fluid cement in the casing, a latch for. holding the valve to the seat, a supporting line for the casing, a weight slidable along the line, and means operated by the weight for actuating the latch to re-' lease the valve to deliver an unbroken conical sheet of fluid cement between the valve and seat. 2. A cement sprayer including a casing for holding fluid cement or the like, said casing having a conical valve seat at its lower end, a conical valve, a. latch for holding the valve to its seat to support the fluid in the casing, a supporting line for the casing, a weight slidable along the line, and means operated'by the weight for actuating the latch to release the valve and free the supported fluid in an unbroken conical sheet.

3. A cement sprayer including a casing having a valve seat for holding fluid cement in the cas-- ing, said casing having a flared valve seat at its lowerend, a conical valve, a latch for holding the valve to its seat to support the fluid in the casing, a supporting line for the casing, a weight slidable along the line, and means operated by the weight for actuating the latch to release the valve and free the fluid from the casing, said seat and valvecooperating to deliver the fluid in an unbroken conical sheet.

4. A cement sprayer including a casing having a flared valve seated atits lower end, a head at the upper end of the casing, a line connected .to the head for supporting the sprayer, a conical valve normally engaging the seat, a stem thereon slidable in the head and having an annular latch receiving portion, a radially movable latch in the head for engaging the stem to hold the valve in closed position, a tripping element slidable along the head and within the latch, said latch and element having cooperating deflecting bases, and means movable along the line and against said tripping element to shift the latch out of en-v

Images