US1596946A - Derrick - Google Patents

Description

C. E. RAN N EY DERRICK Filed Dec. 24 1925 Patented Aug. 24, 1926..

CLARK n. RANNEY, or TULSA, 0KLAHOMA.

DERRICK.

Application filed December 24, 1925. SerialNo. 77,528.

The invention relates to improvements in derricks primarily intended for use in the drilling of oil and gas wells.

The invention more specifically relatesto a novel formof supporting bracket for supporting the girths interposed between the legs of the derrick.

It is an object of the invention to provide a derrick that is exceedingly simple in construction, yet possessing the greatest of strength to withstand the severe shocks and strains to which a derrick is subjected.

In the accompanying drawings Figure 1 illustrates a portion of the derrick; and,

Figures 2 and 3 are views of the girth supporting devices. 7

Referring now more particularly to the drawings wherein like reference characters indicate corresponding parts, the numeral 1 designates the supporting legs of the derrick. These are constructed of timber," the sections being united in any well known manner to provide a derrick of the desired height. The interposed supporting girths for the legs are indicated by the reference character 2. These girths are preferably composed of metallic pipe or tubing of say three inches in diameter. To brace the legs 1, suitable bracing rods 3 are provided, which bracing rods are secured to the legs 1 in a manner to be later described. These bracing rods are preferably metal rods of say seven-eighths of an inch in diameter and are disposed diagonally between adjacent legs.

This invention relates specifically to the means for supporting the girths 2. As shown in Figures 2 and 8 an angle bracket is provided having the two sides 4 and 5 fitting against two sides of the rectangular legs 1. It will be understood that the angle brackets used for supporting the various girths are all the same and a description of one will do for all. Each angle bracket is composed of a casting of metal, the casting being notched at its upper end at the point where the sides 4 and 5 connect for reasons which will later appear.

It will be observed that each side 4 and 5 of the casting carries an integral projecting extension 6. This extension is preferably hollow in order to possess substantial strength while utilizing a minimum amount of material. The outside diameter of each extension is substantially less than the inside diameter of each girth 2. As before stated, these extensions are preferably cast integral with the sides 4; and 5 of the bracket plate but could be otherwise rigidly and immovably secured to'said sides by riveting, weldor otherwise. An angle corner plate 7 is used with each bracket plate. This corner plate constructed from a castiru or stampingof metal engaging and extending beyond two sides of the leg of the derrick. The bracket and the corner plate are united by a U-b/Olt 8 which passes around the upper edges of the side plates 1 and 5 of the bracket, through the notch formed between these side plates and seats inanotch9formed in the corner of the leg 1 serving to retain the assembly against vertical movement on the leg. Fastening nuts are provided on the ones of the ei-bolt for drawing the bracket and the angle plate-tightly together. An additional fastening bolt 11 may pass through the bracket, the derrick leg and the angle plate to retain these parts on the leg if this is found to be desirable.

It will be observed that the extended ends of the angle plate 7 are provided with the openings 12. These openings are adapted to r ceive the inturned' ends of the brace rods 3 disposed between the legs of the derrick.

When the girths 2 are mounted on. the tubular extensions 6 it will be understood that fastening bolts may be employed, as

indicated by the reference .character 13 which pass through the extension and the girths. In lieu of these bolts other devices may be used to retain the girths on these supporting extensions.

laving thus described my invention, what I claim is:

l. A bracket for securing a tubular girth to a supporting leg, comprising integral angularly disposed side plates, and integral tubular extensions radiating from said bracket, the upper edges of said side plates being notched at the angle.

2. A bracket for securing a tubular girth to a supporting leg comprising an angularly disposed plate adapted to fit the leg, means for securing the plate to a leg, integral tubular extensions extending from the sides of said angular plate to receive the tubular girths.

In testimony whereof I afiix my signature.

CLARK E. RANNEY.

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