Abstract: A guide mat for a slant service or drill rig. The guide mat comprises rearward and forward portions and an open area in the rearward portion which is used to allow access to a wellhead. Adjustable pedestals are provided which move in orthogonal planes to the plane of the guide mat and thereby allow for convenient pinning of the mast of the rig to the mat such that the mast is maintained in its correct operating position while the drilling and/or service operations are underway.

Abstract: Walking dragline base frame and revolving frame having an internal web grid of triangular cells in a concentric series of annular girders. Cell plates are oriented in circular and spiral arc arrangements, the spiral arcs extending both left hand and right hand in crossing relation. Segmented rail beam and rail pad structures are provided concentrically in one of the annular girders of the frames connected with intersecting diagonal web plates of the associated annular girder. The rail pads may be of double-T structure. A relative stiffness ratio of base frame and revolving frame approaching 1:1 is attained and wherein the revolving frame may be centrally of diminished depth and the base frame of complementary greater central depth.

Abstract: Disclosed is an Angle Drilling Apparatus for mobile rotary drills and the like having a mast tower for operating and supporting the drill string. A transferable and adjustable lower pivot support is provided in combination with the normal mast raising cylinders and a unique upper mast support strut. The upper mast strut is slideably attached to the mast and provides support to the mast closer to the top of the mast as the mast is deployed at an angle for angle drilling. The adjustable lower pivot support allows drilling to be accomplished closer to the support base and more nearly at the point of vertical drilling.

Abstract: Method and apparatus for raising and lowering a telescoping mast. A telescoping mast having an upper section slidably received within a lower section is pivotally connected to a base in a horizontal position. A line is connected to the lower end of the upper section and is placed over a pulley mounted on the upper end of the lower section and secured to the base. Upward pivoting of the lower section moves the mast to a vertical position while the upper section is extended by action of the line. Lowering the mast from the vertical position causes contraction of the upper section into the lower section.

Abstract: An upper part of a column can be pivotally lowered and raised relative to a lower part thereof for servicing of an appliance mounted thereon. However, before the column part can be lowered it must be raised through a limited vertical displacement relative to the column part. A releasable locking device is provided to hold the column part at the upper end of this displacement, and comprises configurated slots which receive a rotatable pivot shaft. Each slot has relatively wide portions and a relatively narrow portion and the shaft is so shaped that it can pass into the narrow portion (and thereby permit said limited vertical displacement of the column part) only when it occupies a predetermined angular orientation.

Abstract: A portable, adjustable structure for supporting an equipment unit at a distance above a support surface has a lower tower structural member placed on the support surface. Pivot support structural members are affixed to the lower tower structural member in a manner whereby the pivot support structural members are upright relative to the support surface. A plurality of struts are utilized to stabilize the lower tower structural member and the pivot support structural members on the support surface. A tower member is pivotally mounted on the pivot support structural members. The tower member has spaced opposite first and second ends. The equipment unit is affixed to the tower member at the first end thereof. The tower member is pivotally movable to a position substantially perpendicular to the support surface with the first end thereof spaced farther from the support surface than the second end thereof. Ballast is affixed to the tower member at the second end thereof.

Abstract: An erection hinge for use in erecting columns for open air structures utilizes a mounting plate which removably attaches to the foundation of such structures and which supports an offset hinge. The offset hinge carries a cradle which supports a column to be erected. A gin pole and rigging attached to the cradle or column translates simple linear force into a pivotal motion of the column and cradle on the hinge to position the column on its foundations.

Abstract: A method and apparatus for erecting a drilling rig mast. The foot of a drilling rig mast is pinned to the base of a substructure. A traveling block is strung with a crown block at the top of the mast and the traveling block is secured to the substructure. A drawworks mounted on the substructure reels in traveling block line thus pivoting the end of the mast upwardly. The foot of the mast is unpinned and raised to the top of the substructure where it is pinned in a shoe. The drawworks reels in additional cable thus pivoting the mast into an upright position at which point it is secured for drilling or other operations.

Abstract: A pivotal mounting plate for a foldable T. V. antenna. The mounting is designed to be mounted on one side, generally the left hand side of the hard shell top of the camper. It is designed to stand vertically erect with the antenna mounted on it unfolded to render it operative. The mounting plate is pivotal to a horizontal position and latched over a stud or bolt in a carrying and inoperative condition. At this time, the antenna is telescoped and retained in a folded position.

Abstract: A cantilevered mast drilling rig is disclosed in which the erection operation for elevating the cantilevered mast and the drill rig floor to the elevated operating positions is a single step procedure. Both the cantilevered mast and the drill rig floor are completed on the ground prior to the elevating operation. The drill rig floor is pinned to the cantilevered mast so that, in response to actuation of the drawworks, the mast and drill rig floor are elevated to their operating positions as a single unit in a single operation.

Abstract: A mounting socket and method for removably attaching a platform supporting davit to a rooftop. The mounting socket includes a folding handle and wheels permitting easy transportation from a storage location to a position near a compatible building supported mounting pedestal. A pair of fixed hooks formed by the socket engage a pair of holes formed by the platform. The socket includes a hollow cavity adapted to receive the davit. As the socket is rotated into vertical position, a locking clamp having movable hooks engages the platform and a secondary locking lever acts to ensure that the locking clamp remains in a locked position on the pedestal. A davit locking pawl prevents inadvertent removal of the davit from the socket when the socket is in the vertical position.

Abstract: An improved oil well drilling rig structure (10) is provided. The drilling rig structure (10) includes a base (32) for placement on the ground at a well site. The base (32) includes first and second ends (32a, 32b). A drill floor (14) supported on a floor box (12) having first and second ends (12a, 12b) is disposed parallel to and adjacent the first end (32a) of the base (32). The floor box (12) is coupled to the base (32) by spaced apart parallel legs (76, 78) each pivotally attached between the upper box (12) and the base (32) for elevating the floor (14) from a low position adjacent to the first end (32a) of the base (32) to an elevated position medially between the ends (32a, 32b) of the base (32) and located above the base (32) by rotation of the legs (76, 78) towards a vertical position. The structure (10) further includes a tensile link (40) having first and second ends (40a, 40b).

Abstract: A drilling mast and drawworks elevator are pivotally secured to a substructure support with a frame secured to the support and extending upwardly between the drilling mast and elevator support. A cable on a rotatable drum on the drawworks elevator extends from a traveling block in the drilling mast, around the drilling mast crown block, to a drum on the drawworks elevator, and a hook is suspended by the traveling block in the drilling mast. Sheaves are mounted adjacent the upper end of the frame. Mast raising sheaves are mounted in the drilling mast as are deflection sheaves, and a slingline equalizer is connected with the hook means, with sheaves positioned thereon.

Abstract: A portable apparatus for drilling deep boreholes in the earth, comprising a subbase structure, a drawworks platform supported on four legs hinged both to the subbase structure and to the drawworks platform and when in lowered position extends away from a first end of the subbase: A mast hinged to the sub-base structure by two legs and in the lowered position extends away from the second end of the sub-base; a pulling means has a sheave through which a slingline cable is passed, and the two ends of the cable are separately connected between the mast at a selected point, and a pulley mounted on the drawworks platform so that in one continuous pulling motion of the pulling means, the drawworks platform is first raised into vertical position, and then the mast is lifted until both parts are fully erected on the subbase.

Abstract: The invention relates to a mobile drilling rig providing a rotation head which is small enough to fit between the mast members of the rig. Arrangements are made to pivot back the rotation head to give access to the drill line of the rig. The mast members can be pivotted on a frame to place them into the drilling and travelling position respectively.

Abstract: This invention concerns a drilling installation comprising a base which rests on the ground, a rig, a winch, items of equipment such as a drill-pipe storage coffer, and a working floor which is raised above the base, surrounding the rig.The installation is characterized by the fact that it comprises a carrying platform designed to take the rig, and which can be moved from a low position in contact with the base to a high position, and which is connected by a suitable lifting device to lifting uprights attached to the base. The platform also carries the working floor and items of equipment.The invention more specifically concerns drilling installations for oil-drilling operations.

Abstract: A drilling rig carried by a vehicle includes a mast having upper and lower sections. The lower section is mounted on a support surface of the vehicle which is maintained parallel to the ground surface during drilling. The upper section is secured to the lower section so that the longitudinal axes of the upper and lower sections are offset at a predetermined acute angle and the top of the upper section is beyond an edge of the surface. A rotary power drill head is translatable along the length of the lower section. A cable pulled by a draw works on the vehicle extends over a pulley at the top of the upper section and thence downwardly. The angle of the surface is controlled so that during vertical hole drilling the surface is horizontal and the power drill head is directly above the hole. During pipe hoisting, the pulley is directly above the hole so the cable extends downwardly in line with the hole, while it is attached to the pipe.

Abstract: The mobile drilling machine includes a full track or wheeled undercarriage, a drilling mast provided with first guiding tracks extending in the longitudinal direction of the mast for guiding a rotary turntable for drilling pipes and with second guiding tracks, a slider movable on the second guiding tracks, a short supporting arm hinged between the undercarriage and a lower part of the mast, a longer supporting arm hinged at a different point on the undercarriage and connected by a universal joint to the slider and a self-locking driving mechanism provided on the slider to engage a tooth rack or chain mounted on the slider to adjust the inclination of the mast when actuated.

Abstract: A crane with a telescopic extensible boom is disclosed. Two cylinders within the boom are each connected between adjacent sections for relative movement between the sections. Pendants are trained over sheaves on a live mast, and one end of the pendants is held by a stop on the mast. The other end of the pendants is received in the boom over sheaves mounted in fixed relation to the respective crane sections. The opposite end of the pendants is connected to the base section of the boom.

Abstract: A windmill tower supports a propeller and a platform that in turn supports a propeller feather control system and a generator system. The entire tower rotates at its base under changes in wind direction so the rotating propeller is constantly maintained upwind of the tower. The tower is a rigid structure that withstands cyclic thrust and torque loading sufficiently to reduce resonant vibrations of the tower as the propeller rotates under the influence of the wind. The resonant frequency of the tower can be higher than the passing frequency of the rotating propeller blades. The tower includes a pair of generally upright fore legs that converge upwardly toward a first apex on the propeller axis of rotation near the front of the platform immediately behind the propeller hub. A diagonal bracing strut extends downwardly from the first apex away from the plane of the fore legs and toward the rear of the tower.

Abstract: A sectionalized drilling mast, power arrangement and support means therefor includes base means to support the drilling mast means when reclined and when erect.

Abstract: The invention relates to a power arm comprising four faces, two of which being constituted by plates, which arm is mounted for pivotment about an axis and with respect to a structure, and is fitted with the coupling lug of a jack comprising a pivoting axis of said jack and its support, permitting a deflection of said jack which is parallel to the deflection of the arm, said support being constituted by extended portions of the plates.The arm comprises a cross piece of which the length 1 is substantially equal to the spacing between the said extended portions and which is situated between the said extended portions, and transversed by the axis, a threaded end of which cooperates with a nut to hold the cross piece in position between the said extended portions.An application is found in the production of a shovel boom.

Abstract: Safety apparatus for a mining machine having a gathering head for gathering product (e.g., coal) in a mine, a conveyor system which extends rearwardly along the machine from the gathering head for conveying the product rearwardly for discharge at the rear of the machine, and power generating equipment for driving the conveyor system and the gathering head. The conveyor system comprises an elongate conveyor support or structure pivotally mounted for swinging movement about a horizontal axis extending transversely of the machine between lowered and raised positions. The machine has a frame having a rear bottom section below the conveyor support and sides extending upwardly from the rear bottom section. Hydraulic lift means is provided between the rear bottom section and the support powered by the power equipment for pivoting the support. Access is provided between the support and the rear bottom section, when the support is raised, for personnel servicing machine components located in this area.

Abstract: Low level base means extend longitudinally on the earth's surface. Drilling mast support means are positioned adjacent and pivotally connected to the base means and setback tower means are pivotally connected to the mast support means and to the base means. Drilling mast means are secured to the mast support means. Lifting frame means are connected to the drilling mast support means whereby said drilling mast support means, mast connected thereto and setback tower means may be simultaneously elevated from a reclined position to an upright position on the base means. Cable means may be secured at one end to the lifting frame means and extended around sheave means on the base means over sheave means on the lifting frame means and under sheave means on the mast support means.

Abstract: Low level base means extend longitudinally on the earth's surface. Drilling mast support means are positioned adjacent and pivotally connected to the base means and setback tower means are pivotally connected to the mast support means and to the base means. Drilling mast means are secured to the mast support means. Lifting frame means are connected to the drilling mast support means whereby said drilling mast support means, mast connected thereto and setback tower means may be simultaneously elevated from a reclined position to an upright position on the base means. Cable means may be secured at one end to the lifting frame means and extended around sheave means on the base means over sheave means on the lifting frame means and under sheave means on the mast support means and then connected at its other end with any suitable power source to exert a pull on the cable and elevate the mast support, mast and setback tower to an upright position on the base means where the mast may be secured in upright position.

Abstract: A box-like platform having a mast leveling hinge support anchored thereto and a mast structure pivotally attached to the upper end of the hinge support is pivotally attached at one of its ends to an elongated skid unit. The opposite end of the platform is arranged to be raised or lowered by a pair of jacking assemblies connected to the skid unit to effect leveling of the platform. A hydraulic ram having one end connected to the mast and the other end connected to a ram beam supported by a lower extension of the platform enables the mast to be raised to its upright position. By utilizing the ram in conjunction with the leveling characteristic of the platform, the mast assembly can thus be raised to a level and stable condition without the skid unit being perfectly level with respect to the earth's surface. The apparatus permits proper alignment of the mast to the center line of the well to compensate for settlement of the skid unit on an unlevel foundation.

Abstract: A first wheeled trailer means includes support means for supporting a mast and drawworks thereon and a second wheeled trailer means includes an upright structure for supporting the mast in upright positon to conduct well operations. The second trailer means also includes ramp and platform means to receive and position the first trailer means thereon in elevated position whereby the mast may be pivotally engaged with the upright structure of the second trailer means so that thereafter the mast may be raised to an upright position for conducting well operations. The first and second trailer means also include cooperating means to position and secure them together to form a base substructure support for the elevated mast and the drawworks while the well operations are performed.

Abstract: A tower, mast or antenna support construction is provided that is easily swung by one person from an operative, fully upright, antenna-carrying position to a lower maintenance or repair position. It has a normally upright, central mast or column having a member assembly of securely endwise-connected members for, at its upper end, carrying an antenna and/or rotor motor therefor. A supporting frame or leg structure is adapted to be securely imbedded at its lower end in a ground level cement or concrete base to extend upwardly therefrom and swingably carry the column at a mid position therealong. An adjustable counterweight is carried by a hollow lower end portion of the column and is used to provide a substantial center of gravity balance of the column assembly at its swing axis when its antenna and/or rotor are in place, but with the upper end portion of the column assembly provided with a slightly greater effective weight or slight off-balance.

Abstract: A lowerable mast comprising first and second sections, the first section being anchorable at one end in an anchoring position, the second section being pivotally connected intermediate its ends to the first section by a pivotal interconnection with portion of its one end in overlapping relationship with at least portion of the first section in any of its pivotal positions, opposed inwardly directed faces of the overlapping regions of the first and second sections providing sliding co-operative faces for supporting the second section relative to the first section.

Abstract: A first and second mobile trailer means are secured together for forming a base substructure support for a mast, setback tower and drawworks. A working floor is provided in elevated position above the base substructure support when the mast, setback tower and drawworks is in position to conduct well operations. The telescoping mast and setback structure is pivotally carried on the first trailer means and a drawworks is pivotally carried by the second trailer means. A power and rig up arrangement is provided to elevate in a desired sequence the mast, setback structure and drawworks to a desired position for securing on the base substructure support formed by the first and second trailer means for conducting well operations.

Abstract: There is disclosed herein a portable crane having a boom and lower brace supporting an elongated lead adapted to carry a pile driver, drill or other tool. The outer end of the brace has a capstan drive connected to a lead supporting line whereby the brace is movable vertically independently of the lead.

Abstract: A portable rock drill rig includes a pair of telescoping struts for supporting and positioning a mast or feed beam. The struts are connected at their upper ends to a support bracket which is connected to an elongated mast support member by a hydraulic cylinder to provide relative sliding movement between the bracket and support member. The drill rig includes a crawler undercarriage having spaced apart and pivotally mounted crawler assemblies. The lower ends of the struts are each connected to an arm which is fixed to the main frame of the undercarriage. The arms are also connected to respective track oscillation cylinders. The mounting arrangement of the struts provides for improved positioning of the mast for drilling, tramming and transport operations.

Abstract: A method of fabricating a maritime assembly comprising the steps of stabilizing a foundation raft alongside a quay, moving at least a part of an erect tower structure from the quay onto the foundation raft, securing the tower structure to the foundation raft, and floating the assembly so formed away from the quayside site. Additionally a particular method for fabricating a tower structure is described, and a particular foundation raft and a method of constructing such foundation raft are outlined. The method of the invention is not limited to particular method for fabricating the tower structure, or the particular foundation raft.

Abstract: A portable drill rig having an inclined ramp is transportable in discrete sections with each section of the inclined ramp forming a separate truckbed chassis. In erection the front portion of the ramp is swung upwardly with on-site lifting apparatus. Support legs are pendulously swung down and landed on portable landing pads to support the medial section of the front ramp in an angular inclined position. The rear ramp section is lifted at the medial rig section and its large supporting legs allowed to pendulously swing on the ground towards their eventual position. A pin registry is made between the two ramp sections so that the partially erected ramp appears not unlike an apex of a roof. The rear portion of the ramp is then erected to its full angularly inclined position and pinned. Provision is made to utilize a traveling car mounted for movement on the ramp sections for the erection of the ramp legs on both ramp sections.

Abstract: An arrangement for erecting and dismounting an elongate object having one end articulated to a foundation is used, e.g. for erecting power transmission line supports into vertical or substantially vertical position. The arrangement comprises a chassis which is stationary during the installation of an object, a boom having one end thereof articulated to the chassis and a load gripping member mounted for displacement towards the distal end of the boom. In addition, the arrangement is provided, at the distal end of the boom, with an additional boom support articulated thereto which is disposed on the ground during the installation of an object. This additional boom support enables a considerable reduction of power input of means effecting the displacement of the load gripping member carrying the object due to a re-distribution of forces developed during the installation of the object.

Abstract: A particular arrangement of web stiffening members for the extensible and retractable telescoping sections of a crane boom assembly. A series of web stiffening members are secured to each of the side webs of a telescoping boom section, the web stiffening members being angularly displaced in a particular arrangement on each boom section to provide for reduced stress levels in the section. The web stiffening members are arranged on each side web in two series of members, the innermost stiffener of each series being reversely positioned about a reference point provided on the boom section. The reference point for the boom section corresponds to the point of changeover for shear load for the section under cantilever loading.

Abstract: An improved portable drilling rig for drilling deep boreholes in the earth, in which the table or working floor of the rig, on which the rotary table and draw works are supported, is on a separate framework supported on and attached to a structural frame or base, for the drilling rig. The floor structure is broken down into a plurality of parts for ease in transportation, each of which have independent columns and cross-bracing. The central portion of the floor which supports the rotary table, and which must support the full weight of the drill pipe, has special heavy columns which are supported on a structural base in substantially the same position as the base connection of the mast, when in a raised position. Therefore, weight can be transferred from the rotary table to the crown block and vice versa, and the weight is still applied to the base frame in substantially the same position.

Abstract: A street lighting column has upper and lower sections hinged together in such manner that the upper section can be lifted by a double-acting piston and cylinder unit connected between the column sections to a position in which it is free to pivot relative to the base section. The hinge is provided with a support plate adapted to be turned to a position in which it cooperates with a lug on one of the column sections so as to support the upper column section in its raised pivotal position when the direction of action of the piston and cylinder unit is reversed, thus automatically effecting pivoting of the upper section to a position in which it is reachable from the ground.

Abstract: The mast of a portable earth drilling rig is mounted for pivotal movement between a horizontal transport position and selected drilling positions. A series of radially spaced apart lateral projections on each side of the lower end of the mast are provided with apertures for engaging laterally extending projections disposed on a pair of telescopic braces mounted on the rig frame. The braces may be selectively positioned for automatic engagement with a predetermined pair of projections on the mast whereby the mast, for drilling, may be positioned in the desired angular attitude.

Abstract: A lifting crane has a boom of box lattice type construction, and a steel wire rope hoist line extending adjacent to the boom is alternately slackened and tensioned during a cyclical work period as to slap, pound or rub against some of the lattice members. This makes such lattice members vulnerable to damage by contact with the hoist line and subjects the hoist line to abrasive wear by contact with the lattice members. An elongate, rigid connector extends longitudinally of a lattice member vulnerable to damage by hoist line contact and defines a mounting base receiving slot therein. A strip of expendable material softer than the hoist line has a mounting base portion shaped to fit within the slot in the connector for securing the strip thereto and has an enlarged head portion that is positioned between the connector and the hoist line when the strip is secured to the connector to form a shock absorbing cushion that is non-abrasive to the hoist line.

Abstract: A shaft drilling machine generally includes a pivotable power swivel supported on a drilling assembly moved along a mast by hydraulic cylinders. Improved means for positioning the mast include a screw jack assembly with one end adapted to be secured to the power swivel and the other end secured to the base of the machine.

Abstract: Two pivots are provided on a drill tower support. The drill tower is supported on and positively locked to the upper pivot in the horizontal position.The drill tower can be pivoted about the first pivot from the horizontal position to the vertical position and positively locked to the lower pivot. The drill tower is then disconnected from the first pivot and thereafter it can be pivoted about the second pivot for angle drilling.

Abstract: A tower which is especially useful as a radio antenna tower comprises an elongated antenna pole or mast having reinforcing truss structures on opposite sides thereof comprising triangular trusses at spaced locations. One set of trusses on one side employ truss members extending perpendicularly from the mast whereas the other set of trusses on the other side comprises angular truss members joined at their extremities by a truss base. The mast is pivotally supported on a base which is a large pipe cemented into the ground. A cable and pulley system is operated by an electric motor to elevate the mast from its angular position on the ground to an upright position or vice versa to lower the mast to the ground.

Abstract: This invention relates to a jib of a public works machine constituted by two elements, a piece for connecting said two elements, and removable means for locking the piece to the elements.The connecting piece is mounted on one element and comprises first holes disposed at the apex of a polygon; the other element comprises second holes separated from one another by distances equal to the length of the sides of the polygon; finally, when the jib is assembled, the connecting piece is fast with the first element via its axis of rotation and a removable pin introduced into a corresponding hole and in a special hole of said first element and fast with the second element via two removable pins introduced into corresponding holes.One application of this invention is the realization of a hydraulic shovel whose overall size is reduced for suitable road-transport.

Abstract: A drill mast support assembly having a drill mast pivotable between a drilling and a non-drilling position and including elongated rigid brace means for stabilizing the mast in the drilling position. The brace means are connected to the mast by support means which provide for a compact assembly when the mast in the non-drilling position and permit the brace means to be automatically positioned as the drill mast is moved to the drilling position. Lock means are further provided for preventing relative movement between the mast and the brace means when the mast is in the drilling position.

Abstract: A stop lock assembly for a tower mounted on a platform and pivoted thereon whereby the tower is adapted to be raised from a horizontal position to a vertical, erected position. Stop members are operatively connected between the platform and the tower to limit the pivotal movement of the tower to the erected position and to hold portions of the platform and tower in alignment for the reception of locking pins extending therebetween for holding the tower in the erected position.