US1498068A - Derrick - Google Patents

Description

June 17, 1924.

` F. D. BE'ARLY DERRICK Filed Feb. 9. 1924 Patented `lune 17, 1924,

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DERRICK.

Application led February 9, 1924. Serial No. 691,587.

T o all whom t may concern.' t Be it known that I, FRED D. BEARLY, a citizen of the United States, residing at Oklahoma City, in the county of Oklahoma and State of Oklahoma, have invented certain new and useful Improvements in Derricks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to derricks `for oil, gas or artesian wells7 and is especially con.- cerned with features of construction more particularly designed to strengthen.the derrick atl the point where it is necessary to provide an opening or window in order to afford operating space for a walking beam or the like. Y

The principal Obj ect of the invention is to provide simple and eflicient means for resisting buckling of the derrick legs toward the opening provided for the walking beam.. although it is to be understood that the means for strengthening the derrick hereinafter described and claimed are not limited in application to the particular relationillustrated in the single embodiment of the invention appearing in the drawings.

The principal feature of the invention, generally stated, consists in torming'the derrick with a plurality of legs between adjacent ones of which a pair of transversely extending jack girths are arranged, the saidy jack girths being spaced apart at their inner ends to permit 4a walking beam or the like to operatebetween them, and being respectively connected at their outer ends to the correspondingly adjacent legs of the` derrick, tension members being combined with the jack girths and the adjacent derrick legs to form truss structures.

A `further feature of the invention consists in providing a derrick having af plurality of legs with a pair of jackgirths arranged on the vsame side `of the derrickand connected at their outer ends to respectively adjacent derrick legs, the inner ends of the jack girths4 being spaced apart to enableva walking beam to operate between them, tension members being provided for respec` tively cooperating with the ,jack girths and the adjacent derrick legs to form trusses,

and a plurality of obliquely extending braces being employed for connecting the legs with which the jack girthsl cooperate, said braces forming tensionV members which are arranged in pairs, and the braces of each pair being divergent from the outer end of one ofthe jack girths toward the derrick leg with which the opposite jack girth is associated. t

A further feature of the, invention ,consists in forming the derrick legs with aplurality of abutting sections arranged in aline-` ment, and in providing bracing means for adjacent leg sections comprising a transversely extending jack girth supported 'at its outerv end upon a leg of the derrick substantially at the abutting ends of said adjacent leg sections, combined with obliquelyextending tensionr members connecting the jack girth and the adjacent leg sections to form a truss, the inner end oithejack girth terminating in spaced relation to the oppo-` site derrickleg. i

kA still further 'feature ofthe invention, particularly applicable to the type of derrick shown in the drawings, involves the use of a continuous lock wire which passes through the openings of theturnbuckles of the oblique braces ot the derrick to retain said turnbuckles in adjusted relation.

In the preferred embodiment of the inven-` tion illustrated in the drawings,-

Figure 1 is an elevational view of the front of a derrick constructed in accordance with the invention.

Figure 2 is a detail elevation of a portion `of the construction shown in yFig. l.

Figure 3 is a detail perspective view showing the relation of certain ot' the girths and braces to one of the derrick legs.

Figure 4 is a detailv view, partly in elevation and partly in section, showing the inner end of one ot the jack girths and the relation of certain braces thereto. n f

The type of derrick illustrated in the drawings for the purpose of explaining the invention7 is commonly known as the standard drilling derrick. kIt is provided with a plurality of legs l arranged inthe formy of a pyramid having a square base. In order that it may be erected with a minimum amount of labor and be readily taken down for. removal to anotherv place ofA use, each of the derrick legs is preferably formed of a series of abutting sections which are disposed in longitudinal alinement. The low- ,ermost sections or starting legs 2 of the derrick legs 1 are somewhat longer than the ysucceeding yupper leg Sections 3, The. leg:

Slater patent already mentioned.

sections are connected at their abutting ends, an advantageous means for effecting' such connection being to employ angle shaped corner irons 4 and cooperating bolts 5 of the character disclosed in the Slater-Patent No. 1,099,771, dated June 9, 191.4. 'j

f lransversely extending vertically spaced girths 6 are employed to connect the derrick legs at the joints between the abutting leg sections. These girths may be conveniently fashioned as' tubular members having slotted flattened ends which interlock with each other and With the adjacent leg sections of the derrick in the manner set forth in the rli`ension members formed from sections of steel rods adjustably connected by turnbuckles 8 and having hooked ends enabling them to be detachably connected to the angle shaped corner braces 4, serve as oblique or diagonal braces for connecting the adjacent legs Aot the derrick. i

The starting legs 2 at the front of the derrick are commonly connected by a set oli transverse braces 9 and 10 termed respectively, rst and second raised girths, While the derrick leg sections 3 immediately above the starting leg sections 2 are similarly transversely fconnected by braces 11 com-- monly called third raised girths. The Walking beam (not shown) projects into the derrick in the interval between the second and third raised girths at a point opposite the upper ends of the starting' legs 2.

In order to prevent thederrick legs from buckling in at the joints between the starting legs 2 and the leg sections 3 immediately above them, thederrick is provided with a pair of transversely extending jack girths 12 Which have abutment reactions at their outer ends against the respective derrick legs 1 and Whose inner ends are spaced apart .a sufficient distance to aiford clearanceV for the proper operation of the Walk ing beam. The jack girths 12 may advantageously be formed as tubular members having flattened and 4slotted ends similar to those 'provided for the transversely extending tubular girths 6, the flattened outer ends of said 'jack girths being adapted to interlockxvith'the adjacent leg sections of the derrick and with the neighboring end of the adjacent girth@ in the same manner as the lgirths 6 interlock Vvvith each other and with the leg lsections of the derrick. Each jack girth 12 is connected to the adjacent leg sections 2 and. 3 with which it is associated by obliquely extending means 'constituting the tension Vmember element of a truss in which the jack girthtorms thestrutand the adjacent leg sections form the compression member. The tension element of thetruss is preferably constructed as a plurality of oblique tension members llformed of rod sections which are adjustably connected by means of turnbuckles 14. The inner end of each of the oblique bracing members 13 preferably is detachably connected to the inner end of the adjacent jack girth 12, such conl nection being effected by providing the truss 1 with which the other jack girth is associ.k

ated. The oblique tension member braces 16 are preferably formed as rods connected by adjusting turnbuckles 8, their free ends being formed with hooks .vhi'ch enter apertures in the neighboring angle plates or brackets 4 to provide connections with the derrick legs through said brackets.

As shown in the drawings, the turnbuckles of the oblique tension braces 7 and 16 are preferably disposed in substantially the same line so that after these turnbuckles have been Vadjusted a 'continuous lock Wire. such as 1T, may be passed through the turnbuckleA openings to maintain them in adjusted position, The turnbuckles 14 of the oblique tension members lcooperating with one of the ack girths 12 may also conveniently be positioned so that the lock Wire 17 may likewise serve to retain them in adjusted position. This is a very simple construction for preventing loosening of the turnbuckles and is advantageous in that lit affords a visible indication that the turnbuckles are in proper adjusted relation.

It-will be perceived by those familiar With the construction or' drilling derricks that my invention provides means for efficiently strengthening derrick construction at a point Where failure is liable to occur, and j eliminates any Weakness Which otherwise might be occasioned by the provision of the opening or. Window for the operation of the Walking beam.

I claim :-v l

1. A derrick involving a rplurality of legs, a plurality of vertically spaced .girths connectingsaid legs, a pair of jack-girths arranged between .adjacent girths on the same side of the derrick, said jack-girths being spaced apart at their inner ends topermit a Walking-beam or the likey to operate between them and being respectively lconnected at their outer ends to the correspondingly adjacent legs, and tension members respectivelycooperating with said jack-girths and y* the adjacent derrick legs to form trusses.

2. A derick involving a plurality of legs, a plurality ot' vertically spaced girths connecting said legs, pair of jack-girths arranged between adjacent girths on the same side oi' the derrick, said jack-girths being connected at their outer ends to respectively y adjacent derriclr legs and being spaced apart at their inner ends to permit a walking-beam or the like to operate between them, tension members respectively cooperating with said jacl-girths and the adjacent derriclr legs to forni trusses, and a plurality of obliquely eX tending braces forming tension members connecting said legs with which said jackgirths cooperate, said braces being arranged in pairs and being disposed on opposite sides of said jack-girtlis, and the braces of each pair being divergent from the outer end of one` of said j aclr-girths toward the derrick leg with which the other jack-girth is associated.

3. A derrick involving a plurality of legs, each of said legs including a plurality7 of abutting sections arranged in longitudinal alinement, and bracing means for connecting adjacent leg sections, said means comprising a transversely-extending jack-girth supported at its outer end upon a leg of the derrick substantially at the abutting ends of said adjacent leg sections and terminating at its inner end in spaced relation to the opposite derrick leg, and obliquely extending tension member means operatively connecting said jackgirth and said adjacent leg sections to form a truss therewith. j

4. A. derrick involving a plurality of legs including a sectional leg comprising a plusaid legsLObliquely disposed braces connecting said legs, and a plurality of trusses spaced apart at their inner ends to provide an opening for the opera-tion of a walkingbeam or the like, portions of said derrick 'legs forming compression elements of the respective trusses, and said trusses each involving a strut and a tension element engaging said strut.

6. A derriclr involving a plurality of sectional legs, a plurality of jack-girths spaced apart at their inner ends, and having their outer ends respectively connected to the correspondingly adjacent derrick legs, and a plurality of obliquely disposed tension mem bers connecting each of said jack-girths with the adjacent derrick leg, the inner ends of the tension members associated with each jack-girth being connected to the latter, said tension members being connected at their outer ends to sections of the adjacent derriclr leg on opposite sides of the jack-girth with which said tension members cooperate, and said tension members including means for adjusting the tension thereof.

In testimony whereof I aix my signature.

FRED D. BEARLY.

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