US1487608A

US1487608A - Crown block for well-drilling apparatus

Info

Publication number: US1487608A
Application number: US623145A
Authority: US
Inventors: William B Rowland
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-03-06
Filing date: 1923-03-06
Publication date: 1924-03-18
Anticipated expiration: 1941-03-18

Description

March 1s, 1924;

Aw. B. ROWLAND y CROWN BLOCK FOR WE LL DRILLING APPARATUS Filed March 6. 1923 2 Sheets-Sheet 1 um .ummm Nx NNI v .NN

Patented Mar. 18, 1924.

UNITED STI-*KIESY PATENT GFF'ICE.

CROWN BLOCK FOB, WELL-DRILLING APPARATUS.

Application med March e, 1923. serial No.'` 623,145.

To all whom z'zf may concer/n:

Be it known that I, WILLIAM B. RowLAND, a citizen of the United States, residing at Bakersiield, in the county of Kern, and

The object of my invention is to provide a simple, rigid and effective crown-block, especially one in which the sheaves may be adjusted readily as to position; and to this end my invention consists in the novel crown-block assembly which I shall no-w fully describe by reference to the accompanying drawings, in which- Fig. 1 is a plan view of my crown-block.

Fig. 2 is a side elevation of the same.

Fig. 3 is an end view of the structural frame of the crown block, from which the sheaves and their supporting shafts and clamps have been omitted. j j y FFig. 4 is a section on the line 4-4 of Fig. 5 is a section on theline 5-5 of Fig. 4. f l

The structural frame of the crown block, comprises a plurality of parallel spaced beams 1, spacing members 2 at each end, and tie-bolts 3. Upon the beams 1 are fixed the non-rotatable shafts 4 which support and upon which rotate the several sheaves of the operating lines. In the present case for the sake of illustration, the beams 1 are live in number, and they are, as usual of I-cross section Figs. 3 and 4.

The spacing members 2 are short sections of I-beams, set on edge, with their flanged ends fitting against the webs of adjacent main beams 1, as seen in Figs. 1 and 3. The tie-bolts 3, which are best arranged in groups of four, Fig. 2, pass throu h the webs of the main beams 1, and throug the fianged ends of the spacing members 2, two bolts of said group, one above and one below, lying on each side of the web of said spacing members.

The frame thus made is essentially rigid, and well adapted for the purpose. The sheaves here shown are the usual ones, such,

for example, as the sand-line sheave 5, the casing-sheaves 6, the drilling-line sheave v7 and any othersemployed in the art. Each of these sheaves is rotatively mounted on its appropriate fixed shaft 4 by meansof its hub, which is fitted with a bushing 8, Fig. 4. The journal portion 4 of the shaft isof circular cross section and preferably enlarged, while the endsof the shaft are flattened on their lower sides, Fig. 2, to lie firmly on top ofthe I-beams 1 of the structural frame. The shafts 4 are heldon the beams by a pair of complemental clamps. Each clamp; comprises a body portion 9,the faceof which is curved on the radius of the shaft, a flat foot portion 9"L with inwardly directed hooks 9T on each side, and a head'portionvQ, One yof these clamps lies on each side of each end portion of the shaft, the body portion 9 of the clamp fitting the side of the shaft, the fiat foot portion 9a resting on the flat top of the upper fiange of the beam 1, its hooks 9b slidably embracing the edges of saidflange, and

its head portion 9F receiving a bolt 10 which connects the pair of clamps together.v A set screw 11 is fitted through `the foot portion of each clamp and bears on the top of they -beam 1. 'A feature'of these clamps to be especially noted is that the faces vof their body portion 9, which bear on the sides of the shaft are' convexed or crownedlaterally as indicated at 12 in Fig. 5.

The pair of clamps thus associated with the beams and with the shafts, not only provide an effective, firm fastening for the shafts, without the necessity of making holes in the beams as would be required by the use of bolts, but also, they enable the shafts to be placed in any desired position on the beams, and to be set at an angle thereto if and when required, since the clamps can be slipped along the beam tol desired position, and, due to their rounded bearing faces, one pair of clamps at one end of the shaft can be set forward or back of the other pair at the other end, the shaft rocking on the rounded clamp face to accommodate its resulting angularity relatively to the beams, and this adjustment may be effected without having to make any holes in the beams.

On account of the rotative mounting of the sheaves on the shafts, and the relatively inaccessible position of the crown-block, the matter of journal lubrication assumes a peculiar importance. In this connection I have made the shafts 4 with a longitudinal bore 4 the ends of which are normally closed by screw plugs 13. Fig. 4. From the middle lower portion of the bore 4 are made radially directed holes opening out on the lower surface of the journal portion 4 of the shaft, and in these holes are driven tightly wooden oil pervious pins 14. Figs. 4 and 5. In the shaft is made a hole 15 from the periphery inwardly to the bore 4 and in this hole is fitted an oil filler cup 16. Fig. 4. The lubricant thus passes from the cup 16, through the hole 15 into the shaft bore 4, and thence it passes through the grain of the wooden pins 14 to the sheave journal.

I claim:

1. A crown-block comprising spaced, parallel, fianged beams; a sheave-sustaining shaft resting upon said beams; clamps embracingly fitted to the shaft said Y clamps having flat-foot-portions resting on the beams with hooks slidably embracing the beam-flanges7 adapting said clamps for adjustment alo-ng said beams, to vary the position of the shaft thereon; and set screws tted to the clamp foot-portions for Xing the clamps on the beams in adjusted posi'- tion.

2. A crown-block comprising spaced, parallel, flanged beams; a sheave-susta'ining shaft resting upon said beams; and a pair -of complemental clamps embracingly fitted to the sides of the shaft, said clamps resting on the beams and having hooks slidably embracing the beam flanges adapting the clamps for adjustment along said beams, to vary the position of the shaft thereon, and a binding bolt fitted between the tops of the clamps above the shaft.

3. A crown-block comprising spaced, parallel, flanged beams; a sheave-sustaining shaft resting upon said beams; a p-air of complemental clamps embracingly fitted to the sides of the shaft, said clamps having footportions resting on the beams and having hooks slidably embracing the beam flanges adapting the clamps for adjustment alo-ng said beams, to vary the position of the shaft thereon; a binding bolt fitted between the tops of the clamps above the shaft and set screws fitted in the clamp foot-portions for fixing the clamps on the beams in adjusted position.

4. A crown-block comprising spaced, parallel, flanged beams; a sheave-sustaining shaft resting upon said beams; and a pair of connecte complemental clamps having laterally crowned faces fitted to the sides of the shaft over each beam, adapting said shaft for angular adjustment relatively toV beam-flanges adapting the clamps for ad-y justment along said beams; and setscrews for fixing the clamps on the beams in adjusted position.

In testimony whereof I have signed m name to this specification. Y

WILLIAM B. ROW LAND.