US2465813A

US2465813A - Portable derrick

Info

Publication number: US2465813A
Application number: US648721A
Authority: US
Inventors: Dewey R Moore
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-02-19
Filing date: 1946-02-19
Publication date: 1949-03-29
Anticipated expiration: 1966-03-29

Description

D. R. MOORE PORTABLE DERRI CK March 29, 1949.

2 Sheets-Sheet 2- Filed Feb. 19, 1946 I INVENTORI DEWE 1Q. M0085,

BYI

HIS ATTORNEY.

Patented Mar. 29, 1949 UNITED STATES PATENT OFFICE PORTABLE DERRICK Dewey R. Moore, Perry, Okla.

Application February 19, 1946, Serial No. 648,721

6 Claims. (01. 189-16) The present invention aims to provide a portable derrick whose chief component parts can be quickly and easily erected and knocked down and collapsed for transportation safely over public highways and re-erected at a new site.

One object of the invention is to so construct and arrange the various sections that they can be easily and quickly assembled and dismantled, and compactly boxed for shipment.

Another object is to proportion the parts so that no section is too wide to be safely transported over public highways.

A further object is to provide a derrick comprising at least one lower collapsible section having a unitary top section detachably secured thereto in end to end relation.

Another object is to provide a plurality of substantially pyramidal skeleton frame sections detachably connected together in end to end relation and in which each skeleton section includes converging upright legs connected by cross members having separable joints or couplings intermediate their ends and in which certain of the main components are hingedly connected to said legs to permit the parts to be folded or collapsed to facilitate nesting or packing the subassemblies in compact units for shipment by motor truck over public highways.

A further object is to construct and arrange the various component parts as shown and claimed in such manner that they individually and collectively serve the functions herein set forth.

For a full understanding of the novel features, reference should be made to the following description, the accompanying drawings, and the appended claims.

In the drawings:

Figure 1 is a side elevation of a preferred form of derrick embodying the invention.

Figure 2 is a rear elevation as viewed in the direction of the arrow 2 of Figure 1.

Figure 3 is a front elevation as viewed in the direction of the arrow 3 of Figure 1.

Figure 4 is a horizontal section on line IV-IV of Figure 3.

Figures 5 and 6 are views illustrating the collapsed or folded condition of parts shown in Figure 4.

Figure '7 is a horizontal section on line VII- VII of Figure 3. 7

Referring in detail to the embodiment of the invention illustrated, the portable derrick comprises a unitary top section A of substantially pyramidal conventional form for supporting the usual overhead sheaves 8, an intermediate lower collapsible section B and a bottom collapsible section C, adapted to be anchored at its lower end to a conventional base D which may be assumed to have associated therewith any standard form of rotary table such as usually used in the drilling of oil wells.

The unitary top section A includes four converging legs I'D, which as viewed in top plan, may be regarded as located at the corners of a square or an oblong, thus the top section may be regarded as a one-piece pyramidal skeleton section. No novelty is claimed for the top section, except as it is combined with one or more lower collapsible or quick knock-downable sections such as B and C, to be presently described.

The intermediate section B is of novel construction and arrangement, especially adapted to facilitate quick erection, dismantling, and safe transport to a new site. This section B is generally of frusto-pyramidal form, and comprises four converging legs lo adapted to be detachably connected at-their upper extremities by joints I2, to the lower extremities of the legs I'll of the top section A. The opposite sides l4-i4 of the section B are duplicates, and each consists of a skeleton; panel frame including two converging legs "l and a plurality of side cross members l6 constituting a set of such members. These members each are split intermediate their ends dividing them into segments, for example at the center planes 18, where they are provided with quick detachable flange couplings 20 adapted to facilitate assembly and disassembly. Suitable inclined struts 22 or ties, as shown, are provided to stiffen each panel. A set of rear cross members 24-24 are hingedly connected at 26-26 to the legs lo -40 and are provided with quick detachable flange couplings 28 dividing them into segments to facilitate assembly and disassembly ofthe center section. Preferably diagonal struts 29 connect rear cross members 24 to provide additional reinforcement of the structure, as shown in Figure 2. Diagonal knee braces 30 are pivoted at 32 to the segments of cross members It and are detachably secured at 34 by removable bolts or pins to the segments of cross members 25. The center section B, as thus constructed, can be quickly dismantled by uncoupling the joints at 20, 28 and 34, whereupon the segments of cross members 24 can be swung or folded about the pivot points or hinges 26, as indicated by the arcs with arrowheads E, so as to collapse the four component parts of the center section to the condition of Figures 4 and 5, the knee braces 30 being swung, as indicated by the arcs with arrowheads F, about their pivots 32 to overlie the segments of cross members I6, as shown. Upright trusses 36, including upright members 31, cross members 38 and diagonal knee braces 40 are pivoted at 42 to the members i 6 at the front, as shown in Figure l. The knee braces are detachably secured at 44 to the members 38, as shown. These parts can be collapsed or folded as indicated by the arcs with arrowheads G and H in Figure 4. Thus the component parts of each panel of the center section of the derrick can be collapsed into compact subassembly and loaded on a truck for transportation to a new site and there reassembled. It is seen that knee braces and rigidify the center section of an erected derrick.

The bottom section C comprises converging legs la "which are joined at their upper extremities by quick detachable couplings 46 to the contiguous lower extremities of the legs lll Upright members 3'! of truss 36 are similarly attached at the joint between sections B and C. Except for size, the component parts of the bottom section C are substantially identical with those of section B and are so shown, and thus further detailed description is unnecessary except to mention that suitable foot anchorages 50 at the lower ends of the legs l0 detachably secure the derrick as a whole to any conventional base or foundation frame structure D of an oil well drilling rig.

The sections A, B and C are each about 42 feet high and the bottom of section A is about 8 feet square; thus the unitary section A can be transported readily when laid horizontally without seriously obstructing trafilc over public highways. Since the base of section C is an oblong of about 14 feet by 16 feet and the base of section B is about 10 feet by 14 feet, it is apparent that such bulky structure could not be safely transported by truck over public highways because of the lack of lateral'clearance for other passing vehicles. However, the problem of safe transportation over such highways is overcome by the adoption and use of the herein disclosed and claimed invention.

Although I have specifically shown and described a preferred construction and arrangement of parts which an actual reduction to practice has demonstrated to be highly desirable, it is not to be construed that I am limited thereto, since I contemplate such modifications and substitutions of equivalents as may come within the scope of the appended claims.

I claim:

1. A structural section for portable derricks comprising a pair of longitudinally extending front corner legs, a pair of longitudinally extending rear corner legs, sets of side cross members connected to and extending between the front legs and the adjacent rear legs, a set of rear cross members at longitudinal positions corresponding with the longitudinal positions of said side cross members connected to and extending between the two rear legs, said side and rear cross members being formed of segments detachably coupled intermediate their length, the segments of one set of cross members being hinged relative to the segments of the other set of cross members, and brace means extending across the rear corner joints and detachably connecting contiguous, relatively hinged segments.

2. A structural section for portable derricks all) comprising a pair of longitudinally extending front corner legs, a pair of longitudinally extending rear corner legs, sets of side cross members connected to and extending between the front legs and the adjacent rear legs, a set of rear cross members connected to and extending between the rear legs, the space between the two front legs being open, said side and rear cross members being formed of segments detachably coupled intermediate their length, the segments of one set of cross members being hinged relative to the segments of the other set of cross members, truss members extending outwardly from said front legs, and corner brace members connected to the segments of the side and rear cross members and to the segments of the side cross members and the truss members rigidifying the section.

3. A structural section for portable derricks comprising a pair of longitudinally extending front corner legs, a pair of longitudinally extending rear corner legs, sets of side cross members connected to and extending between the front legs and the adjacent rear legs, a set of rear cross members at longitudinal positions corresponding with the longitudinal positions of said side cross members connected to and extending between the two rear legs, the space between the two front legs being open, said side and rear cross members being formed of segments detachably coupled intermediate their length, the

segments of one set of cross members being hinged relative to the segments of the other set of side cross members, brace members extending across the rear corner joints and detachably connecting contiguous, relatively hinged segments, and truss members extending outwardly from said front legs and being hinged relative to the segments of said side cross members.

4. A portable derrick comprising a unitary top section including bracing members and converging corner legs defining a substantially pyramidal skeleton framework, a lower section including converging corner legs detachably coupled to the corner legs of the top section, said lower section having a set of rear cross members and two sets of side cross members secured to the corner legs thereof, each of said cross members having an intermediate separable joint dividing it into segments, the segments of said set of rear cross members being hinged relative to the segments of said sets of side cross members on axes longitudinal of said corner legs to facilitate collapsing the lower section for shipment, and diagonal knee braces extending across the corner joints between the relatively hinged segments and being piv-' otally mounted on one of the segments and detachably connected to the other.

5. A portable oil well derrick of great height comprising a unitary top section and a plurality of knock-down lower sections of substantially pyramidal skeleton form, each section including corner legs detachably coupled to those of the adjacent section at their contiguous extremities, each of said lower sections having a set of rear cross members and two sets of side cross members attached to the corner legs, each of said cross members having a separable joint about midway between the legs dividing the member into segments, the segments of said set of rear cross members being hinged relative to the segments of said sets of side cross members on axes longitudinal of said corner legs, and knee braces extending across the corner joints between the relatively hinged segments and being pivotally mounted on one of the segments and detachably connected to the other.

6. In a portable derrick, top and lower sections having converging front and rear corner legs and cross members joined to said corner legs, the corner legs of one section being detachably coupled to those of the other, the cross members of said lower section being located at the two sides and the rear of the derrick, leaving the front open, and being composed of detachably coupled segment-s hinged relative to each other, truss members extending outwardly from the front corner legs of the lower section and being hinged relative to the side cross members, and corner brace members extending between and connected to the side and rear cross members and between the side cross members and the truss members rigidifying said lower section.

DEWEY R. MOORE.

REFERENCES CITED The following references are of record in the file of this patent:

UNl TED STATES PATENTS Number Name Date 848,304 Hines Mar. 26, 1907 1,458,866 Wetzel June 12, 1923 2,215,920 Franks Sept. 24, 1940 15 2,335,584 Couse Nov. 30, 1943 2,340,351 Thornburg Feb. 1, 1944