US2268796A - Sectional derrick - Google Patents

Description

Jan; 6, 1942. w. BRAUER SECTIONAL DERRICK Filed Aug. 5, 1939 4 Sheets-Sheet l INVENTOR EYS W. BRAUER Jan. 6, 1942.

4 Sheets-Sheet 2 Filed Aug. 5, 1939 ATTORNEYS Jan. 6, 1942. -w. BRAUER 2,268,796

Jan. 6, 1942.

' 'w. BR AUE R SECTIONAL DERRICK 7 Filed Aug. 5, 1939 4 Shets-Sheet-4 INVENTOR l6! fiugjj BY 6 r v ,YIATTORNEYS Patented Jan. 6, 1942 UNITED. STATES PATENT jOF-FICE sscrioua DERRICK Walter Brauer, Oklahoma City, Okla.. Application August 5, 1939, Serial No. 288,66.

' 3 Claims.

'This invention relates to a sectional derrick;

and more particularly, but not by way of limlta-. 4

tion, to a derrick for use in connection with a portable rotary rig structure for'oil well drilling.

In the past few years shallower oil formations have been discovered which have caused adaptation of lighter rotary drilling outfits for drilling these formations. With the advent of the portable rotary drilling rig, there has been an adaptation'of structures that could be. easily moved and rigged up, and one essential part of companying drawings which illustrate one form of my invention. v

In the drawings: Fig. 11s a slde'eleva'tio'n of the derrick in'comtaken from the open side thereof.

Fig. 3 is a front elevation of the lower section of the derrick.

the rig is a portable derrickcapable of such adaptation.

It is therefore an important object of this, in-

vention to provide a derrick composed of a plurality of sections of upwardly decreasing dimensions, said sections being capable of being easily collapsed or folded into a compact space,

and when assembled together form a rigid up-.

right derrick for use with a well'drilling rig.

Another object is to supply a derrick which may be easily assembled and disassembled for I the lower section in such manner to be capable of optional swinging, either forward or backward, in order to fold the derrick as may be desired. I

And still another object is to produce a sectional derrick for use with a portable rig unit,

said derrick constructed in such manner to allow disassembly of the derrick for facilitating move-.

ment of the derrick in conjunction with the-skid for short hauls, as well as disassembly of the derrick for separate transportation of the derrick apart from the rig.

Another object is to provide a sectional der-,

middle section as I tion as-C.

.its apex.

The lowermostsection is designated as A, the

Fig. 4 is an elevational view'ofthe derrick mounted on a draw-works; skid, showing the upper sections swung in onedirection. A

Fig. 5 is a view'similar to Fig.4 showing the upper sections of the derrick swung in another direction.

Fig. 6 is a side elevational section-of the derrick.

Fig. 7is a similar view of the middle section of the derrick. I

Fig. 8 is a detail view in front elevation showing the hinge connection at. the upper end of the lower section of the derrick. V

Fig. 9 is a side elevation thereof. Fig. '10 is a side elevation in detail of the hinge connection at the bottom endof the lower section of the derrick.

Fig. 11 is a front elevation thereof. I Referring more particularly to the drawings in I detail, the derrick comprises a plurality of separable sections divided from'each other vertically and constructed convergently upward, each section being substantially of the same dimensions at its base as the next lower section is at B, and the upper or top sec- Referring to each of the sections separately,

' and more particularly the lower section A, this rick for use with a portable drilling unit capable of being assembled and disassembled by its own drilling unit, thus eliminating any additional equipment for this purpose.

And an additional object is to provide a sectional derrick for use with a portable rotary rig formed substantially of angle iron welded 'togetherin order to provide lighter weight, the sections when assembled to form a rigid, durable and practically indestructible derrick which will not materially deteriorate through wear, use or inclemency of the weather.

Other objects and advantages of the invention will be evident from the following detailed description read in conjunction with the ac- Fig. .5).

section comprises four corner posts, 2, I, 6 and 8, with the posts 2 and I being substantially greater in length than the posts 6 and 8. The derrick posts are formed of angle iron in order to provide greater. strength with a minimum of weight to the derrick.

' The lower end of each of the corner posts of section A are provided with annular flanges ID in orderto secure the section (preferably by bolting) to a derrick Referring to Figs. 3 and 6, on three sides the I corner posts 2, 4, .6 and 8 are rigidly connected 7 by a plurality of horizontal cross ties I4 formed' of angle iron and preferably welded to the posts.

The corner posts are additionally braced by a view of the lower top of the posts...

- with identical hanger posts 22 comprising upand I integrally secured to the posts. The lower mounted thereon a plurality of freely rotatable plurality of diagonal braces or ties I4 cooperating with the cross ties I4 for connecting the posts. It will be noted that the lower part of the section A is constructed with inclined braces I8 in order to provide openings in this portion of the derrick for a purpose as will be hereinafter set forth. I

Theposts 2 and 8, as well as-4 and 8, are like- 1 wise connected by.a pair of parallel bars 20 diagonally disposed and welded to the extreme 10 The corner posts 2 and d are each provided It will be understood that each of the corner posts 2 and 4 are provided with a hanger post 22. However, for the purpose of illustration, only one hanger post will be considered, as is clearly shown in Figs. 8 and 9. The socket members 24 and 28 are provided with an aligned aperture 82 for receiving a bolt 84 held in the apertures by nuts 86 for a purpose as will be hereinafter set forth.

The shorter postsi and 8 of section A are each provided with an integral hanger post 42, and as clearly shown in Figs. 10 and 11, each post comprises a pair of upstanding apertured members 44 and 48 receiving a bolt 48 secured by the nuts '50, for a purpose as will be hereinafter set forth.

From the foregoing it will be apparent that the 85 lower section A is substantially in the shape of a 30-60 degree triangle with the diagonal braces, 20 forming the hypotenuse of the triangle.

Referring to Figs. Land 7, the middle section B comprises corner posts 52, 54, 86 and 58, with the posts 82 and 84 substantially greater' in length than the posts 58 and 88. The lower end of the posts 58 and 88 are connected to the lower end of the comer posts-82 and 54 by a pair of parallel, diagonally disposed bars 80 complementary to the bars 20 in the lower section A; On three sides, the corner posts of section B are rigidly supported by a plurality of horizontally disposed cross ties 82 cooperating with a plurality of diagonally disposed'braces 84, all 50 formed of angle iron and welded to their respective corner posts. The lower end of each of the posts 52 and 84 are provided with an identical, hanger post 68 comprising apertured members 88 55 portion of the members 88 and I0 are provided with aligned apertures in order that the bolt 48 maybe received therein. A stationary shaft I2 is secured V in the hanger posts -86, and has pulleys I4. I

From the foregoing, it will be apparent that the hanger posts 42 and 88 form a hinge connedtion between the legs 8 and -8 of lower section A and the legs 82 and 84' of upper section B. which facilitates assembly and disassembly of the section B with respect to the section A, as

. and 28 and bolt 84 in order to provide a hinged connection at this point between'the lower section A and the upper section B. The upper end of each ofthe corner posts 82584, 88 and 88 of" bolt holes "I8 for a purpose aswill be hereinafter set forth. I

From an inspection of Fig. 2, it will be noted that one side of sections A and Bare open due to the elimination of their respective cross bars and the supporting braces. A projection bar or rack member is welded to the corner posts 52 and 54 on the open side which provides for racking up single sections of drill pipe (not shown) during the drilling operation.

The upper section C (Fig. 1) comprises four identical corner posts '82 being formed of angle iron and rigidly inter-connected by cross bars 84 and. intersecting ties '88. The extreme upper end of the section C is provided with cross bars 88 of increased height for supporting a shaft 88 and crown block 80 in any conventionalmanner for aypurpose as'will be hereinafter described. "The lower end of each of the corner posts 82 is provided with a fish plate or angle bar 82 having a'plurality of apertures 84. It will. be apparent that with the section C in upright position, with respect to section B, that the apertures 84 are in alignment with the apertures I8 for receiving bolts 86 securing the sections together. From an inspection of Fig.l, it will be noted that with the derrick in upright position, the section C is bolted to the section B, and in turn, section B is bolted to'section A,

Referring now to Fig. 4 showing the disassembly of the derrick by folding sections Band C in one direction with respect to section A, the cable 88 of the rotary drawworks I00 extends upwardly from the drawworks through the interior of the derrick and passes over a pulley 80 on a shaft 28 and around the crown block 80. downwardly through the derrick. and over a pulley I4 and through the travelling block I02. The hook portion of the block I02 is secured to the skid I2 and from the block I02 the cable continues upwardly over asecond pulley I4, and again through the crown block- 80, and back through the derrick over the shaft 12 to be fixed witha dead end to the skid I2. With this arrangement, it will be apparent that any rotation of the drawworks I00 will obviously cause a movement of the cable 88 between the drawworks and around the block I02.

With the hanger posts 42 and 88 uncoupled from each other by removal of bolt 48, it will be apparent that sections B and C are free to swing or pivot about the hinge connection provided by the hanger posts 22 and I8 whereby .the drawworks and cable provide controlled power for raising and lowering the sections 13 and C with respect to the lower section A.

The-folding of the derrick as shown in Fig. 4, is very advantageous for hauling the derrick as a co plete unit with the skid and portable rig. espe i ally when it is desired to transport the complete unit for short hauls, such as one well in proximity of another. Referring now to Fig. 5 showing the upper sections of the derrick swung in a direction opposite to that disclosed in Fig. 4, the cable 88 of the drawworks extends upwardly from the drawworks I00 'through the opening provided by bl8088 II to the outside of the lower section A, thence around a pulley 88 and upwardly through the interior of the derrick; around the crown block 80 and again downward through 'the inthe section B are provided with a plurality of eliminated, and the cable line run over I provided at the to be fixed m dead-end position to the skid is.- With the hanger post It uncoupled from the hanger post 22, the upper sections B and C are free to pivot about the hinge connection provided by hanger posts 42 and I! disposed at the top of the corner posts 8 and 8, wherein the cable will allow the derrick to be raised or lowered. This particular folded position of the derrick is advantageous when it is desired to transport the derrick separately from the skid containing the drawworks and rotary drilling structure, It will be apparent that with thederrick in this position,

section B can be uncoupled irom section A, as well as section 0 unbolted from section B to facilitate transportation of the derrick by truck or the like.

From the foregoing, I the derrick can be folded to either position as curing the base section to an immediate upper section, a second hinge connection provided at the lower end of the base section'ior securing v the base section to an immediate upper section,

it will be apparent that i shown by Figs. 4 and 5, using the power 0! the drawworks for controlling the raisingand lower.-

unstringing either the crown block block and the cable line from ing without or the travelling their drilling positions. Furthermore, it will be apparent that the pulleys 3| "and I4 can be a and 12, however, for a more emcient operation. utilization of the pulleys is preferable.

Changes be made in the combination and arrangements! parts as heretofore set iorth'in the specification and shown in the drawings, it

made within the scope tion.

What I ciaimis:

the shafts being understood that any modification in the I precise embodiment of the invention may beof the iollowingiclaims without departing from the spirit of the inven- 1. In a derrick comprising a base section, a pin-Q rality 0! upper sections, of upwardly decreasingv dimensions super-imposed one upon another and supported by the base section. a hin e connection top of the base section for sesuitablyeither one .0! said hinge connections acting as a hinge when the other one is uncoupled to allow optional pivotal movement of the upper sections with respect each of the longand'short posts. an upper section on the base section and comprising,

disposed braced long and short corner posts. a

pair of diagonally disposed bars complementary with the first mentioned diagonal bars connecting a the long and short posts of the upper'section,

means m1- securing the"sections together at the upper and lower ends of the. base section, either securing means acting as a hinge when the other one is released to allow optional directional movement of 'the upper section about the lower base section. i

' 3. A derrick comprising a base section triangularly shaped'in elevation, a second section having a depending triangularly shaped portion a separable hinge connection provided at the top of the base section for securing the base section tothe upperpart or said depending triangular portion, a second separable hinge connection provided at the lower end of said depending portion I for securing the last mentioned portion to the lower end of the base section, either one of said separable hinge connections acting as a hinge when the other one is uncoupled to allow selective pivotal movement'oi the second section with respect to the base section. .4

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