US2204713A

US2204713A - Portable derrick

Info

Publication number: US2204713A
Application number: US274745A
Authority: US
Inventors: Jr Carl White
Original assignee: FRANKS Manufacturing CORP
Current assignee: FRANKS Manufacturing CORP
Priority date: 1939-05-20
Filing date: 1939-05-20
Publication date: 1940-06-18
Anticipated expiration: 1957-06-18

Description

June 18, 1940- c. WHITE, JR

ronmspn DERRICK s Shee ts Sheet 1 mam 20, 1939 MmSu INVENYDR CARL WH/ :TE, JR,

M; ATTORNEY June 18,

c. WHITE. JR 1 2,204,713 PORTABLE nmmrcx Filed "21320.1939 5 Sheets-Sheet 2 air fNI ENTOR By CARL WH/TEg/E.

ATTORNEY "Jun is, 1940.

c. w rr, JR PORTABLE DERRI CK Pu-d lay an, 1939 Frames 4 JNVENTQQ 5 Shuts-Sheet 3 6142!. WHITE, 2;

c. WHITE, 4

PORTABLE DERRICK Filed llay 20. 1939 5 Sheets-Sheet s [NI/ENTOR 6142/. WHITE, J12

ATTORNEY Patented June 1 8, 1940 "PORTABLE nsaiucx Carl White, in, Tulsa, Okla., assignor to Franks Manufacturing Corporation, Tulsa,

Okla, a

corporation of Oklahoma Application May 20, 1939, Serial No.,2'14,'l45 3 Claims., ,(Cl. l8911) This invention relates to a portable derrick mast, for use, particularly, with a portable drilling apparatus. a

The principal object of this invention is to provide a portable derrick structure comprised of telescoping sections, adapted particularly for use with portable drilling rigs.

Another object is the provision of a portable derrick structure comprising a, base section pivotally mounted on a mobile base, an upper sec tion telescopically arranged in said base section, and having a novel form of latching means for locking the upper section in extended position on saidbase section. i

Still another object is the provision of 'a telescoping derrick structure mounted on a mobile base, carrying power operated means for raising and lowering the structure and for extending and retracting the telescoping sections thereof.

A further object is to provide a portable derrick structure for use with portable drilling rigs,

saidderrick structure being of sufliciently large dimensions required for drilling Jot deep wells but adapted to be telescoped into a structure of reduced dimensions suitable for transporting on a truck.

Anadditional portable derrick structure for portable drilling rigs which is mounted on a truck and adapted to be easily and quickly raised and lowered as required for operating or transport.

Other important objects and advantages of this invention will be readily apparentfrom the following detailed description when 'read in coni junction with the accompanying drawings which show a preferred embodiment thereof. In the drawings: a Fig. 1 is a side view of a truck on which is mounted the derrick structure of this invention, I showing in dotted lines the lowermost portion the derrick structure in vertical position and in full lines the power mechanism for raising and lowering the structura and the derrick structure in transport position with the sections thereof telescoped together. a i v Fig. 2 is a front view of the derrick structure in vertical position showing in full lines the sections telescoped together, and in dotted lines a the extended position of the upper section.

Fig. 3 is a side view of a portion of the upper section of the derrick structure, a r

Fig. 3a is a side view of the lower section of the derrick structure.

Fig. 4 isa schematic view showing the mecha object is the provision of a nism for extending and retracting the upper section of the derrick structure.

Fig. 5 is a perspective view of the latch mechanism for locking the telescoping derrick section together.

Fig. 6 is a detallof the latch mechanism showing in full lines one of the locking pawls in looking position and in dotted lines the position of the pawl when the derrick sections are released from each other to permit telescoping thereof; and Fig. 7 is a view in perspecti e showing the outer face of one of the locking pawls.

Referring to the drawings, particularly Fig. l, a motor truck I is shown in side view on which "is mounted the derrick structure of this invention, designated generally by the numeral 2. The lowermost portion of the derrick in vertical operating'position is shown in dotted lines, while the entire structure is shown inhorizontal transport position in full lines. The derrick structure is pivotally movable between transport and vertical operatingposition about shaft 3, rotatabiy supported fromthe truck frame, and is movable thereon by means of-a pitman t, one end of which is rotatively attached to a, horizontal pivot bar 5, extending between the lowermost extremities of the rear legs 6 of the derrick and the other end journalled in a cross head -'i, whichis longitudinally movable in .the channels of the side member 8 of the truck frame. The cross head I, is idriven by.means of a power operated screw 9, also mounted inthe channel of the side membet 8 and connected by means of. a chain drive iii to.a power take-01f H operated from the truck transmission, not shown. IBy driving the cross-head I towardthe rear of,the truck frame,

thrust is applied by means of pitman 5} to the pivot bar 5 and rotates the derrick 5 about shaft 3, thereby lowering the derrick to the transport an position shown in full lines in Fig. 1.

The described mech nism for pivotaily moving a truck-mounted derrick between transport and vertical operating positions is described in greater detail in the co-pending application of W. B. Woody, Serial No. 194,155, filed March 5, 1938.

The derrick structure of this invention consists ofa base section, designated generally by the numeral l2 and an upper section, designated generally l3, which is adapted to telescope withit!) in the base section.

1 The base section is composed of rear legs and front legs ll forming the corner posts of the derrick and constructed of angle-iron, the in ,cluded angles of which face inwardly toward 5E "which progressively decrease toward the top .of the base section.

Theupper section I3, the upper end of which carries the usual crown block and pulleys for rigging the lines which support the well pipe and drilling tools, .is also generally rectangular in horizontalsection, being somewhat smaller in base dimensions than the upper end of base section I2. Upper section I3 is also composedof angle-iron corner legs, the rear legs being numbered I 8 and the front legs I1, which aresuitably crossand angle-braced in the same manner as base section I2.' I

Rigidly positioned within base section I 2, are, longitudinally extending front and rear pairs of guide rails I9 and 20, respectively (Figs. 2 and 3),

constructed of angle-iron and forming a hollow rectangular structure of uniform side dimensions from top to bottom, which are sufliciently greater than the lower end of upp r section I3 to receive the corner legs I1 and I8 thereof in loose fitting sliding engagement within the corresponding rails I9 and 20. Guide rails I9 and extend longitudinally from the upper end of base section I2 to a point therein just short of the lower end of the base section. Thus, when upper section I3 is extended or retracted relative to the base section, it slides inside the guide frame formed by the pairs of guide rails I9 and 20.

The clearance between legs I1 and I8, and rails I9 and 20 is suificient to allow .the former to clear lugs attached to the latter for purposesto be described hereinafter.

Upper section I3 is extended or retractedrel 1 ative to the base section I'2 by means of a pulley and cable arrangement illustrated schematically inFig, 4, from which guide rails I9 and 20 are removed for purposes ofclarity. The arrangement consists of a pulley 2| journalled in one side of'base section I2 but near the lower end thereof, a second pulley 22 journalled in the same side of base section I2 but near the top thereof, and a pair of pulleys 23-23 is positioned on'opposite sides of the lower end of upper section I3.- A cable 24 is wound on a winch 25 which is driven by a shaft 26 connected by means ofa chain drive 26a to the power take-off II, and is threaded first through a guide pulley 21, located outside the derrick structure, then, under pulley 2|, over pulley 22, under both'pulleys 2 3-23, and the free end thereof is then attached to a dead end connection 28 firmly afflxed to the upper end of base section I2 on the side opposite pulley 22 Thus, with upper section I3 .inthe retracted position within base section I2, by pull applied to cable 24, the upper section is hoisted upwardly within base section I2 along guide rails I9 and 20 until the lower end thereof is at the desired position near the top of base section I2 whereit is locked in place on lugs 34 by means of a latch mechanism;-

, to be described in detail hereinafter. A When it is rick floor.

anism shown particularly in Figs. 5, 6, and '1, which may be described as follows:

The lower endlof each of the legs I1 and I9 1: provided with a pawl 30, hingedly attached thereto by a hinge pin 3|, pawl 30 is a hollow, generally angular member, preferablyv of cast steel, provided about its lower edge with a projecting angular shoe 32 which is adapted to be received within the angle of the corresponding guide rail I9 or 20. The shank 33 of each pawl is also angular in shape but has narrower sides than the shoe 32. The side dimensions of shank 33 are such as to allow the shank to fit snugly within the angle of one of the legs I1 or I8. The shank 33 is hingedly attached by means of hinge pin 3| toits corresponding leg" or I8 so as to swing inwardly towardthe center of section I3. When the pawl is snugly in place in the leg angle the lowerend of the corresponding leg will rest upon the upper face of shoe 32 which is, in turn, received upon the upper face-0f an angular lug -34 which is firmly attached, as by welding, to the inner faces of the sides of the corresponding corner rail I9 or 20 and thus locks the upper section I3 against downward movement in base section I 2. 9

The pawls 30 are swung in or out of locking position simultaneously by means of toggles 29 each one of which has one end hingedly attached by means of a hinge pin 35 to lower end of the corresponding pawl, the toggle entering in the space between the sides of the pawl and being held there by means of the hinge pin 35. The opposite ends of one pair of toggles 29 are pivotally attached to a winged nut 36 and the opposite ends of the other pair of toggles are attached to a winged nut 31. The

winged nuts

36 and 31 are threadedly attached to the oppositeends of an elongated rod 36, the ends being threaded oppositely to each other so that when the rod is turned in one direction, the

winged nuts

36 and 31 will move 'toward the opposite .ends of the rod 33 and so actuate the toggles to move toward the legs I1 and I 8 and push the attached pawls into the locking position. Turning the rod 38 in the reverse direction will cause thetoggles to ,pull' the pawls out of locking position on lugs 34 and so allow the upper section I3 to clear lugs 34 and permit telescopingthe upper section within base sprocket 42 fixedly mounted on rod 38, .at an intermediate point thereof, to which a chain 43 is connected. Chain 43 is of suflicient length to reach the floor of the derrick when'the upper section I3 is in position at the top of base section I2. 2 To pull pawls 30f inwardly of the derrick and out of locking position between the derrick section, the forward segment of chain 43 is pulled downwardly by the operator on the der- This operation rotates rod 38 in the clockwise direction causing the

wing nuts

36 and 31 to be retracted on the threaded ends of the rod. To move the pawls 33 outwardly into locking position between the derrick sections, the rearward portion of chain 43 is pulled downwardly by the operator reversing. the previously described movement of rod 33 and

nuts

36 and 31 with their attached links and pawlsr A secby means of pawls 30 when the upper section is retracted within base section I2.

The above described structure isoperated in the following manner: With the derrick structure downwardly and forwardly about pivot bar ture in the horizontal position shown in full lines in Fig. 1, it is desired to raise the structure in preparation for drilling. Power from the truck power plant is applied through power take-oil. II

to screw 9 to draw cross head I from its rearward position to the forward position shown in dotted lines in Fig. 1. 'Ihismovement acts through pitman 4 to pull the lower end of the derrick struc- 3 and thus raise the mast structure to the vertical position. i

,Pawls 30 are then drawn inwardly of upper section l3 to clear lugs 34 by downward pull on the forward segment of chain 32 and power. is applied from power take-oil? ll through drive 26a, and shaft 26 to winch 25, to apply pull to cable 24 which then acts through the several pulleys 21, 2|, 22 and23-23 to lift the upper sec-, tion l3 along guide rails l9--20 to the extended position. When the raising of the upper section has brought the lower end thereof above the level of lugs 34, the pawls 30 are moved intolocking position between the ends of legs l1 and I8 and lugs34 by suitable rotation of rod 33 by downward pull on the rear segment of chain 43 and i when the pawls are in position above lugs 34, ca-

ble 24 is slackened sufficiently to bring the upper section firmly to rest on the lugs 34. The structure is now in position to begin drilling operations, since it is ordinarily maintained fully rigged with drilling lines, this being possible by virtue of the described construction of the derrick structure of this invention, and it is one ofthe important advantages thereof in saving time, trouble and expense in the moving and setting up of derricks of this class.

Y or

To prepare the derrick for transport, upper section 13 is lifted slightly by means of cable 24,

the pawls 30 are withdrawn from the locking position and cable 24 slacked to allow the upper section to retract within the base section. When this movement is completed the compacted structure is then returned to the horizontal transport position by reversing the afore-described movement of cross head I and pitman 4.

It will be readily understood that numerous alterations and modifications may be made in the size, form and arrangement or the details :of the structure of this invention, without departing from the scope of the appended claims.

What I cIaim and desire to secure by Letters Patent is:

'1. ,A portable derrick structure comprising a mobile base, a derrick mounted on said base. said derrick comprising a lower section pivotally mounted on said base and movable relative thereto between transport and vertical operating positions, spaced parallel guide rails formed from angle iron, extending longitudinally within said lower section, an upper section, formed from angle iron concentrically arranged relativeto-said rails,

retra ctablewithin said lower section and slidable therein on said guide rails, releasable latching means carried by said upper section and'adapted to cooperate with stop means mountedbn said" guide rails for locking the upper section in extended position to said lower section, said latching means comprising pawl members hingedly attached to the lower endof said upper section and adapted to be swung into and out of engagement with said stop means, each of said pawls having an angular shank portion and a base in the form of an angular shoe, the shank portion and shoe portion being adapted to seat within the angles of the legs of the upper derrick section mobile base, a derrick mounted on said base comprising a lower section pivotally mounted on said base and movable relative thereto between transport and vertical operating positions, a guide frame extending longitudinally of said lower section and comprising four angle-iron rails arranged at the corners of a rectangle and having .their included angles turned inwardly toward the longitudinal axis of said frame, an upper derrick section retractable in said lower section within said guide frame, said upper section being composed of four angle-ironcorner legs concentrically arranged relative to said rails, a pair of lugs arranged within the angles of each of said rails, a pawl hingedly attached to the lower end of each of said corner legs, and adapted to be swung into and out of engagement with said lugs, said pawls having an angular shank portion and a base in the form of an angular shoe, the shank portion and the base portion being adapted to seat within the angles of the legs of the upper derrick section and the guide rails respectively, when 'the pawls are swung into engagementwith pawls into and out of engagement withsaid lugs, means for extending and retracting said upper sectionrelative to said lower section, and power operated means carried by said mobilebase for actuating said extending and retracting means and for moving said derrick between transport and vertical operating positions relative to said base. 1,

3. A portable derrick structure comprising a mobile base, a derrick mounted on said base, said derrick comprising a lower section pivotally mounted onsaid base and movable relative thereto between transport and vertical operating'positions, spaced parallel guide rails, formed from angle iron, extending longitudinally within said lower section, an upper section, formed from angle iron concentrically arranged relative to saidrai'ls, retractable within said lower section and slidable therein on the guide rails, releasable latching means carried by said upper section and adapted to cooperate'with stop means mounted on said guide rails for locking the upper section in extended position with respect to the lower section, said latching means comprising pawl ,members .hingedly attached to the lower end of said upper section and adapted to be 'swung into andoutof engagement with said stop means, each of said pawls comprising anupper angular shank portion and an enlarged base portion, said base portion being adapted to fit snugly within the angle of a guide rail between the stop means and the end of one of the legs of the upper derrick section, when the pawls are swung into engagement with the stops, means for positively moving said pawl members into and out of engagement with the stop members, means for extending and retracting said upper section CARL WHITE, JR.