US2176965A - Collapsible derrick - Google Patents

Description

Oct. 24, 1939.

lA. HYNEs COLLAPS IBLE DERRICK Filed Feb. 17, 1958 3 Sheets-Sheet l Oct. 24, 1939. A. HAYNES COLLAPSIBLE DERRICK Filed Feb. 17, 1938 3 Sheets-Sheet 2 oct. 24, 1939. VA, HAYNES l coLLAPsIBLE DERRIcK Filed Feb. V1'7, 1938 3 Sheets-Sheet I5 Patented Oct. 24, 1939 UNITED STATES PATENT OFFICE CGLLAPSIBLE DERRICK Albert Haynes, Bay City, Tex. Application February 17, 1938, Serial No. 190,897 4 Claims. (Cl. 189-12) My invention relates to derricks such as are and it is to be understood that these sections can employed in well drilling operations. be separately assembled on the derrick platform,

It is an object of my invention to provide a as shown in Figs. 10 and 1l, before they are derrick so constructed that it may be formed in hoisted into position in the assembly of the comsections or units adapted to be separately aspleted device. sembled and then erected on the location. With reference to Fig. 1, the construction of I desire to provide separate derrick sections the lower section of the derrick is shown. There which may be collapsed to a certain extent so are four upwardly inclined legs I which are conthat they may be more readily handled. nected in spaced relation to each other by trans- 'lf I have as a further object to connect the verse braces 2, 3 and 4. 10 separate parts which form the derrick in such The lower ends of each of the legs are supportmanner that the complete derrick may be ased upon the derrick platform indicated at 45 in sembled 'on the floor and the separate sections the drawings. In addition to the transverse then hoisted into position and secured rigidly in braces 3 I provide a vertically extending brace place. 5v which is connected at its lower end to the 15 A I desire to provide a derrick whichvmay be brace 4 and extends upwardly to project someeasily assembled and disassembled for moving what beyond the upper brace 2. There are also from one location toanother. diagonal braces in the usual manner shown at 6.

It is a further object of the invention to pro- The separate braces may be secured together in- "f vide a structure of derrick leg which is particutermediate the legs of the derrick by plates l. 20

larly strong and of light construction and adapt- Any additional braces such as are shown at 8 ed for use on a portable type of derrick. may be employed as desired.

Referring to the drawings herewith, Fig. 1 is a The lower section of the derrick is intended to side elevation` showing the construction of the be secured rigidly together and the joints belower` section of my improved derrick. tween the braces and the framework of the der'- 25 Fig. 2 is a similar view showing one of the rick are rigidly secured by rivets or bolts indiupper sections forming a portion of the derrick. cated at 9. The upper end of each leg extends Fig. 3 is a view similar to Fig. 2 but showing somewhat above the upper brace and has upthe section partially collapsed. wardly extending plates I thereon to connect Fig. 4 is a broken detail showing the manner with the next upper adjacent section of the der- 80 of mounting the hoisting deviceemployed in asrick leg. Between the legs on opposite sides, the

sembling the sections in position. extension of the brace 5 holds a supporting post Fig. 5 is an end View of a section of the der- I I upon the upper end of which is pivoted a rick leg. pulley I2. The post II is secured to the brace 5 l" 1 Figs. 6 and 7 are side views of the construction oi' the derrick by means of clamps I3. A cable 85 shown in Fig. 5, Fig. 6 showing the section I4 is extended around the pulley I2 and the loose y twisted. end may be lowered downwardly for connection Fig. 8 is a longitudinal section of braces emwith the next interior section of the derrick ployed in the construction of the derrick, said which is to be hoisted in position above the rst i view being taken on the line 8-8 of Fig. 9. section. The other end of the cable is extended 40 Fig. 9 is a broken side view of one of the joints around a pulley I5 at the lower end of the derin one of the braces. rick and the ends of the two cables employed Fig. 10 is a diagrammatic view showing the are adapted to be engaged by a pulling device relative positions of the sections 'on the derrick whereby the next section may be raised. While i platform before erection. straps or plates of metal I0 are shown, it is 45 Fig. 11 is a diagrammatic view showing the difcontemplated that any desired type of connecferent sections nested together upon the platform tion between adjacent sections may be employed,

before the erection of the derrick. it being desirable to form a strong and rigid Fig. l2 is a side view of the assembled derrick. connection. l I contemplate forming the derrick in longi- In Figs. 2 and 3 a showing is made of the 50 tudinal sections there being as many sections emupper sections of the .derrick and it will be noted ployed as is necessary to obtain the height of the that these sections are intended to be collapsed derrick desired. 4With reference particularly to and that the brace members connecting the legs Fig, 12 it will be noted that the derrick there I are pivotally connected together.

shown is made up of four superimposed sections With reference particularly to the drawings it the two side members of the brace 2b. The

two side members of the brace 2b are formed with inwardly extending lugs I1 shown as arcuate -in shape in Fig. 9 and also the ends of the brace at I8 are bent inwardly to engage with laterally extending lugs I9 on the brace 2a. It will be seen therefore that when the joint is straightened out into the positions shown in Figs. 8 and 9 the connection between the two braces will be comparatively rigid due to the overlapping ends of the braces and to the engagement between the lugs I1 on the brace 2b engaging with the laterally ,curved ends 20 of the brace 2a and the similar engagement of the curved ends`I8 of the brace 2b with the lug I9 upon the brace 2a. y

Between the lower transverse'braces and the next upper set of transverse braces 2a are downwardly inclined brace members 2I. These braces are jointed between their ends, as seen in Fig. 3, and are pivoted at 22 to clamping members 23, which secure it to the derrick leg, and at the other ends they ,are connected to the transverse pivot pin 22a. This pin connects the lower ends of these opposed jointed braces together.

The upright brace member 5a is provided with slots therein at spaced intervals to receive transverse pins 24 and 21 upon intermediate brace members 25 and 25a and transverse pins 26, 28 which connect the ends of the intermediate braces 2a. A similar pin 29 in the upper transverse brace 40 is also slidable in the upper slot 30 in the brace 5a. These slots or openings 30 in the upright brace member 5a allow for the sliding of the transverse pins therein and the length of these slots is suillcient to provide the necessary movement of the pivot pins therein when the derrick is collapsed and the sectionsI of the'braces are moved toward each other by the relative upward movement of said member, as shown in Fig. 3. .'I'he lower transverse brace is connected to the upright brace member 5a by the pin I6; this is not a pin-and-slot connection, but a simple pivotal connection.

In order to collapse the side legs I of the derrick toward each other so that one section may be assembled within the next lower section, the

brace members will be collapsed into the positionl shown in Fig. 3 and in so doing the transverse pins uponthe brace members-will slide within the slots 30 of the upright brace member 5a.

It is to be noted that both the diagonal braces 2I and the intermediate braces 25 and 25a are jointed between their ends and thus may be moved, as stated, into the Fig. 3 position. When raised into proper position the sections may be again moved into 'the position ready for use as seen in Fig. 2. l

At the upper ends of each of the leg sections there are upwardly extending connecting plates I0, as previously described relative to the lower section.

\ When assembling the Various sections I have,

in Fig. 1l, shown them in nested position upon sections. To do this, however, the sections are c ollaps'ed further than is shown in Fig. 3. This is accomplished bydetaching the ends of the upper brace 40 by removing the bolts- 4I. allow the legs to be moved further inwardly into closely collapsed position so that the unit or section may be better handled or transported.

In making up the derrick the lower section of the derrick shown in Fig. 1 will be rst erected,

' the parts being assembled rigidly together. Each of the additional upper sections of the derrick will be assembled one within the other, as shown in Figs. 10 and l1, ready to be hoisted into position and each section will be collapsed, as shown in Fig. 3. The ends of the two opposite cables I4 will then be secured to the outer one of the sections and the section will be raised into position so that the lower end of the legk section I will abut against the upper end of the lower section already in position. Bolts will be extended through the openings in the brace plates I0 and through the lower end of the section as shown at 3l in Figs. 2 and 3, andthe p-arts will be thus held together. brace member 5a. will be secured to the next upper longitudinal brace member andthe derrick will be then ready to receive the next upper section which will be assembled in the same manner. When the parts are completely assembled, as shown in Fig. 12, the crown block 32 may be assembled thereon and the derrick will be ready foruse. f

The legs I of the derrick will necessarily sup- There is an inner plate 34, which is somewhat- Z-shaped in end view both the side edges of the plate being curved laterally to a slight extentf There is another plate 35, which is made in two portions, which when connected with the portion 34 at right angles thereto form a type of cross. When these two longitudinal sections have been secured together the parts are reenforced to strengthen the same by angle iron sections, one in each of the angles between the two assembled plates. Each of these angle iron sections' 36 have their ends re-cuived as shown at 31 and 38 to correspond to the curvature of the sides ofthe inner plates 34 and 35. The assembled leg is therefore made up of two longitudinal plates set at right anglesI to each other with angle irons in each of the four angles o-f the original plates. The plates or irons making up the leg may be welded at their margins or may be riveted to- -position to form the complete derrick. It will,

This Will Theupper end of the longitudinal lio therefore, be easily and quickly erected and when it becomes necessary to move the derrick from one location to another it may be easily and quickly disassembled into separate sections which maybe then more easily transported. The advantages o-f the construction lies in the fact that it may be easily erected Without-dangerxto thev worker-and is cheap and economical in construction.

What is claimed is:`

l. A derrick composed of longitudinal sections mounted in superposed position tapered upwardly, each section above the lower section having four spaced legs, a plurality of transverse braces pivotally connected to said legs, a joint midway between the ends of said braces except the uppermost one, diagonal braces jointed between their ends, an intermediate upright member, a slotted connection between said transverse braces except the lowermost transverse brace and said upright member, whereby the relative upward movement o-f said upright member will move said braces except the uppermost one to collapse said section and move said legs toward each other.

2. A derrick compos-ed of longitudinal sections mounted in superposed position tapering upwardly, each section above the lower section having four spaced legs, a plurality of transverse braces pivotally connected to said legs, a joint midway between the ends of said braces except the uppermost one, diagonal braces jointed between their ends, an intermediate upright member, slot and pin-means connecting said upright member and the joints in said transverse braces, said slots being of different lengths whereby the upward movement of said member will ex said joints and collapse said section in the manner described.

3. A derrick including a lower section and a plurality of superposed upper sections diminishing in size upwardly, legs on said sections, means to brace said lower section, a plurality of transverse braces pivotally connected with said legs on said upper sections, said braces being jointed intermediate their ends, except the uppermost brace on each upper section, diagonal braces jointed intermediate their ends, an upright member midway between each pair of legs, and means o-n said upright member connected with said transverse braces to flex said joints and collapse the lower ends of said upper sections transversely, said upright member having a limited sliding movement relative to the intermediate and uppermost of said transverse braces. l

4. A derrick including a lower section and a plurality of superposed upper sections, legs at the corners of each of said upper' sections, transverse braces and diagonal braces connecting said legs, said transverse braces except the uppermost transverse brace on each upper section being made of two parts, a transverse pivot connecting the adjacent endsI of said parts, each part overlapping the other at said pivot, laterally extending lugs on each overlapping end and inwardly extending anges on the adjacent end cooperating to frictionally engage with said lugs to strengthen the joint.

ALBERT HAYNES.

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