US1601059A

US1601059A - Fabricated derrick

Info

Publication number: US1601059A
Application number: US68208A
Authority: US
Inventors: Black Burton
Original assignee: ARTHUR J CARR; FREDERICK L FEISTHAMEL
Current assignee: ARTHUR J CARR; FREDERICK L FEISTHAMEL
Priority date: 1925-11-10
Filing date: 1925-11-10
Publication date: 1926-09-28
Anticipated expiration: 1943-09-28

Description

B. BLACK FABRICATED DERRICK Sept. 28 1926. Lemmas Filed Nov. LO 1925 3 Sheets-Sheet 1 INVENTOR.

BY J M MTORNEY B. BLACK FABRICATED DERRICK .fisept. 28, 1926.

Filed Nov. 10. 1925 3 Sheets-Sheet 2 Sept. 28 1926. 1,601,059

B. BLACK FABRICATED DERRI CK v Filed Nov. 0 [925 3 Sheets-Sheet :5

INENTOR.

BY flm %%Z@7TTORNEY the panel sections of which the other two sides of the derrick are formed.

' The derrick illustrated in the drawings is shown as being made out structural steel shapes, but it is to be understood that the present invention in its broad aspect is not restricted to any particular material the specific embodiment disclosed being primarily intended for the purpose of illustrating a practical application or the principles of construction involved.

As shown, each of the four sides of the derrick is formed of a plurality of panel sections secured together in vertical alignment with the several sections of the respective sides of suitable dimensions to produce a completed derrick gradually converging or tapering upwardly to the derrick top upon which will be mounted the usual crown-block.

The panel sections A of two opposite sides are of relatively similar construction and the panel sections B of the other two sides are also of relatively s iilar construction, but slightly dillerent Irom the panel sections A, therefore it will sullice herein to describe in detail one of each of the sections A and B.

Each panel section A comprises opposite angle-iron leg members a disposed vertically at slightly converging angles correspond ing to the general taper ot' the completed derrick, lower and upper transverse

marginal girts

2 and 3, (so called because they form the lower and upper niargines of the panel) an intermediate transverse girt i, a lower pair of diagonal sway braces 5 and 6, an upper pair of similar diagonal sway braces 7 and S, and lower and upper reinforcing vertical braces 9 and 10. All of these braces and girts are of angle-iron form and are swaged at opposite ends to bring poth flanges thereof to parallel contact, thus providing securing ends or double thickness which are bored or punched to receive securing rivets or bolts. The several girts and sway braces are positioned to engage the inner faces of the adjacent flanges of the respective leg members a, the horizontal flanges of the

marginal girts

2 and 8 extending inwardly, the respect ve horizontal flanges ot' the intermediate rt and of the sway braces 5 and 7 eXt-encing outwardly, while the respective horizontal flanges of the

sway braces

6 and 8 extend inwardly, the opposite ends of these girts and sway braces being secured to the respective leg members a preferably by bolts and nuts with the bolt heads on the inside and the associated nuts tightened against the outer face of the respective leg. members. These several bolts are designated by reference characters consisting of a sufiix added to the numeral designating the respective parts they secure to the members, thus the bolts 2 secure the transverse marginal girt :2 to the lower ends of the leg members a, the bolts 3 secure the transverse marginal girt 3 to the upper ends of said leg members while the bolts it ff T and ti secure the intermediate girt and the respective diagonal sway braces to said leg members. The upper end of the. vertical rcinlorcing brace 9 is positioned between the two diagonal sway braces and (S at their point of crossing and is secured to the vertical flanges of both of said sway braces by a bolt 5) (see Fig. and the lower end of said vertical brace U is secured against the inner lace of the vertical flange oi the marginal gilt 2 by a bolt 9 The vertical brace ll) similarly secured between and to the vertical flanges of the diagonal sway braces i and S by a bolt 10 and to the vertical llange of the intermediate girt l: by a bolt 10".

This provides a complete rigid panel unit which. will hold its shape during shipping and throughout its handling during erection and dismantling as well as while assembled in the derrick structure.

Each panel section B comprises opposixo angle-iron leg members 6, lower and upper transverse marginal girts 1'2 and 13, an intcrmediate transverse girt ll, a lower pair of diagonal sway braces and 1(5, an upper pair ol diagonal sway braces 17 and 1S, and lower and upper reinforcing vertical braces 19 and 20. All of these girls and braces are of the same construction as those of the panel sections A. However their ends are secured by bolts to the outer :l'aces ot the adjacent llanges of the respective leg members Z) instead of to the inner faces as are the braces and girts ot' the sections A. Bolts 12 secure the ends of the lower marginal gn't 12 to the lower ends oi the respective leg members 0. bolts 13 secure the ends of the upper marginal girt 13 to the upper ends ol the respective leg members 6, while bolts 14, l5, l6, l7 and 1S secure the intermediate girt l-l and the respective diagonal sway braces to the leg members 6. The vertical braces 19 and 21) are positioned in the same relative positions as are the like braces of the sections it and are secured in position by bolts l9, l9" and bolts and 20".

\Vhile it is evident and is clearly realized that the derrick may, if desired. be erected piece by piece, the preferred method to be followed in practice will be to pie-assemble the various panel sections. leaving to the lield crew only the work of assembling these panel sections into a completed derrick. 'i'here'lore, 1 will. "for the purpose of this disclosure, limit the description of the erect on to the manner in which the several sections are secured together to form the completed structure, it, of course, being understood that the erection will be progressive from the bottom to the top of the derrick,

lot)

andfurther, thatas the sections of the different sides are in break-joint relationship two of'the lowermost and two of the top sections will be of dilferent relative height than the rest of the sections so that the derrick may have alevel base and end with a level top.

lVith particular reference to Figs. 1, 3 and l, it will benoted-that each A section is vertically aligned with and rests upon the next lower A sectionwith the horizontal flanges of the marginal girts thereof in engagement. That is, the marginal girt 2 of onepanel section engages the marginal girt of-the next lower section. The horizontal flanges oi. these-coengaging marginal girts are secured together throughout their lengths by relatively spaced'bolts 21, this being one of the reasons, why it is not neces saryto provide joint-plates for the leg members.

The severalpanel' sections B alsoare assembled-in the same manner with each B section vertically aligned with and resting upon-the next lowerB section andwith the coengaging

marginal girts

12 and 13 secured together by bolts 21.

vi hilethesections A and B are secured tothe companion A- and B'sections in the same manner, itwillbe seen, with particular reference to Figs. 3 and" t, that the adjacent A and B section's overlap each otherby one-half their-respective heights, thus bringing the joints 22' between the vertically adj acent A sections in regular staggered relation tothe joints 22 be-tweenthe vertically adjacent 13 sections, this being a further reason for the elimination of joint-plates for the leg members.

Referring now more particularly to Fig. 2 of the drawings, it will be noted that the panel sections A are assembled with the panel sections B sothat the angle-iron leg members a have an intermeshing or overlapping engagement with the angle-iron leg members Z) or" the panel sections B, with each leg angle engaging the heads of the several bolts which secure the several girts and braces to their respective leg members, thus forming at each corner of the derrick a corner post or leg of double construction.

With the panel sections thus assembled the nested leg members are secured together at intervals by bolts A and B, each oi said bolts extending through the flanges of both leg members a and Z) of each corner post or the derrick. These leg bolts A and B are preferably positioned on opposite sides of and closely adjacent to the points of securance of the respective girts and braces and if desired additional leg bolts may be positioned between such points as indicated in Fig. 1.

This preferred method of assembling the panel sections is followed throughout the erection of the entire derrick, with a great saving in the time'and expense of fielderection over the-usual methods now in vogue, this being of great importance invview of the fact that derrick or rig-builders are highly skilled.

It will thus be evident that all fabrication and pre-assembling which may be per formed ina factory or shop with relatively cheaper labor represents a cost saving of major importance.

From the above it will be seen that the present invention provides a derrick of an exceptionally strong and rigid character which will be capable of withstanding hard usage, one of the most important features contributing to this superior strength and rigidity beingthe fact that the several panels break joint at the marginal'girts and invertically staggered relationship and that the. marginal girts are secured together throughout-their lengths thereby producing-a construction which is a great deal stronger against transverse strains than any derrick structure which is securedtogether only; at the leg joints.

It will also be evident that this invention provides a complete panel-derrick which can be erected or dismantled with maximum speed and a minimum fieldcost and which, even it constructed of wood,- can be dismantled with practically no deterioration or breakage as'compared with the usual types of 'nailed derricks.

While the specific embodiment ofi the invention herein illustrated and described is fully capable of fulfilling all of 'theobjects primarily stated; it. is to-beunderstood that I do not wish to limit the invention in this regard, for it is susceptible of embodiment in various other forms, all coming within the scope of the following claims.

I claim as my invention:

1. In a derrick of the nature disclosed, the combination of: relatively spaced corner legs each comprising a plurality of longitudinally-aligned leg sections; lower transverse girts connected at opposite ends to the respective lower ends of the leg sections of adj acent legs; upper transverse girts connected at opposite ends to the respective upper ends of said leg sections; and means for securing each lower girt to the vertically adjacent upper girt.

2. In a derrick of the nature disclosed, the combination of: four relatively spaced corner legs each comprising a double string of longitudinally aligned angle leg sections, one string nested within the other with their flanges in parallel relationship with the adjacent sides of the derrick; lower transverse girts disposed on opposite sides of the derrick and connected at opposite ends to the respective lower ends of the inner leg sections of the adjacent legs; upper transverse girts on said opposite sides of the derrick and connected at opposite ends to the respective upper ends of said inner leg sections; other lovver transverse girts disposed on the other sides of the derrick and connected at opposite ends to the respective lower ends of the outer leg sections; other upper transverse girts disposed on said other sides of the derrick and connected at opposite ends to the respective upper ends of said outer leg sections; and means for connecting each lower transverse girt to the vertically adjacent upper transverse girt.

3. In a derrick ol the nature disclosed, the combination of: tour relatively spaced corner legs each comprising a double string 0t longitudinall v aligned angle leg sections, one string nested within the other with their flanges in parallel relationship with the adjacent sides of the derrick; loiver transverse girts disposed on opposite sites of the derrick and connected at opposite ends to the respective lOWCl' ends of the inner leg sections of the adjacent legs: upper transverse girts on said opposite sides or? the derrick and connected at opposite ends to the respective upper ends of said inner legsections; other lOWCl transverse girts disposed on the other sides of the derrick and connected at opposite ends to the respective lOWCl ends of the outer leg; section other upper transverse girts disposed on said other sides ot the derrick and connected at opposite ends to the respect've upper ends of said outer leg sections; and means tor connecting each lower transverse girt to the vertically adjacent upper transverse girt; the inner leg sections of each corner leg being disposed in girts secured to the transverse marginal girts ot the vertically ad acent panel sec.-

ingeach of its sides termed of complete pre- -Q1i'ibl d panel sections having transverse marginal girts, with the several panel sections secured together at the corners ot the derrick and the transverse marginal girls of each panel sec ion secured t'o thc transverse marginal irts ot the vertically adjacent panel sections.

1. A derrick ot the nature disclosed having; eaeh of its sides formed of complete preassen'ibled panel sections, with the several panel sections secured together at the corners of the derrick and to the vertically adjacent panel sections, the panel sections of each side being disposed in break-joint relationship vvith those of the adjacent; sides.

In testimony \vhereot. I have hereunto s t my hand at Los Angeles. Calil'ornim this 3rd day of November. 1925.

BURT X BLACK.