US960474A - Portable derrick. - Google Patents

Description

R. B. WUODWORTH.

PORTABLE DERRICK.

APPLICATION 11,111) MAR. 9, 1909.

Patented June 7, 1910.

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R. B. WOODWORTH.

PORTABLE DERRICK.

APPLICATION FILED MAR. 9, 1909.

960,474, Patented June 7, 1910.

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R. B. WOODWORTH.

PORTABLE DERRICK.

APPLICATION FILED MAR. 9, I909.

Patented June '7, 1910.

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PORTABLE DERRICK.

APPLICATION FILED MAR. 9, 1909.

Patented June 7, 1910.

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ROBERT B. NOODVT(DP/HEX, OF EITTSBURG, PENNSYLVANIA.

PORTABLE DERRICK.

T all whom it may concern:

Be it known that I, ROBERT B. lVoonwonrn, of Pittsburg, Allegheny county, and State of Pennsylvania, have invented a new and useful Improvement in Portable Derricks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation of a portion of one form of my improved derrick; Fig. 2 is a similar View showing the opposite side of the derrick; Fig. 3 is a sectional plan view showing the lower section of the derrick; Fig. 4: is a partial end view; Fig. 5 is a sectional view on the line VV of Fig. 3; Fig. 6 is a similar view on the line VIVI of Fig. 3; Fig. 7 is a detail end View of the sand reel and its supporting connections; Fig. 8 is a detail side elevation of a portion of the structural work of the derrick; Fig. 9 is a sectional detail plan view on the line IX-IX of Fig. 8.

My invention relates to derricks or drilling rigs employed for drilling wells for oil, gas, water or other similar purposes and is designed to provide a simple, eiiicient and cheap construction which can be erected at a very moderate cost and which can also be readily taken apart without the use of gin poles or scaffolding, to be transported from one point to another.

Another object of my invention is to provide a derrick construction in which the lower section or panel of the supporting poles or columns are vertically disposed and are secured to sills which are supported on the usual foundations, and in which the vertical columns are connected by means of diagonal braces to the supporting columns on which the machinery for drilling, etc, are mounted.

The precise nature of my invention will be best understood by reference to the accompanying drawings, which will now be described, it being premised, however, that various changes can be made in the details of construction and arrangement of parts, without departing from my invention as described in the appended claim.

In the drawings the numeral 2 designates the sills of the derrick which are secured together by means of angle plates 3. Supported on these sills 2 are the vertical portions-l, of the columns, and supported on the upper ends of these portions are the in- Specification of Letters Patent.

Application filed March 9, 1909.

Patented June '7, 1910. Serial no. 482,257.

' clined portions 5 forming a continuation of the said columns, but at an angle thereto. Supported above the first section 5 of the column is one or more similar members 5. The four columns are held together by means of the struts 6, and diagonal braces 7. The end of each strut and diagonal brace, as well as the ends of two of the column members are secured to a connecting plate 8. Secured to the struts (3 by means of angle or clip plates 9 are the ladder sections 10, each section being of a length substantially eq ual to the length of the column section to which it is attached.

Secured between one of the struts 6 and the sill 2 of the first section are the vertical posts ll, and connected to the posts 11 and the sections a of the columns are the connecting plates 12, to which are connected the diagonal braces 13, and strut let, the posts forming a shaft support for the bearings of the bull wheel 15 located at one end of the derrick. The other end of the derrick is provided with a similar frame work for supporting the journals of the calf wheel shaft when the calf wheel is employed with the apparatus. By reference to Fig. 1, it will be noted that the columns of the lower section at one end thereof, are held together by means of a strut (5 and diagonal braces 7. The other side of the lower section as shown in Fig. 2 is provided with upright posts 16 which are secured to the strut of the said section, and to the sill below the section. These posts are also connected by means of the diagonal braces 18 and connecting plates 19 with the columns a. Secured to one of the end sills by means of angle plates 20 are the'sills 21, which form the base of an A shaped frame 22. This frame forms a support for the journals of the walking beam 23. Mounted on these sills 21, are the posts 2e and 25, to which are attached the journals for the shaft of the band wheel 26, and the sand reel 27 respectively. Mounted in bearings which are secured to the frame work at the top of the derrick, are the usual sheaves 28, over which the ropes connected to the various tools used in drilling the well are passed.

All of the material used in the construction of my improved derrick is preferably fabricated in the shop, and is shipped ready for erection at the point at which the derrick is to be used. It will be seen by reference to the accompanying drawings that each of the upper sections are composed of four column sections, connecting plates, struts and diagonal braces. The lower section is composed of four vertical columns, the one side being braced by means of the struts and diagonal braces, while the other three sides are braced by means of vertical posts which are framed to the column, the strut and the sills by means of connecting plates and diagonal braces. This construction leaves three of the sides open to provide free access for the workmen, and at the same time provides strong and eficient supports to which the bearmgs or other parts of the machinery are attached.

By means of the diagonal bracing for the posts 11 the stresses caused by the various shafts are transmitted directly into the lower sills of the derrick and are transmitted through the sills to the foundation, while in the old construction these stresses were transmitted to the sills through the parts of the derrick. By the provision of the A shaped frame work, the stresses set up by the walking beam are transmitted directly to the sills and their foundation without passing into the derrick proper.

The advantages of my invention result from the provision of a sectional derrick, whereby the derrick can readily be erected or dismantled without the use of a gin pole or scaffolding. Also by the rovision of the diagonal bracing between t e columns and the journal supports for the shaft, thereby, transmitting the stresses directly to the foundations, instead of the derrick.

I claim:

A well drilling derrick including sills, substantially vertlcal tower members rising from the sills, bracing between the front and rear tower members at one side only of the derrick, the space between the corresponding members at the opposite side of the tower being open for access to the interior of the tower, machinery-supporting posts rising from the sills between the front pair and also between the rear pair of tower members, and lacing between the posts and the adjacent tower members.

In testimony whereof, I have hereunto set my hand.

ROBERT B. WVOODWVORTH.

Witnesses:

GERTRUDE SGHOTTE, ROBERT A. MARBLE.

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