RU2102576C1 - Mechanized racks of drilling rig - Google Patents

Abstract

FIELD: drilling rig equipment. SUBSTANCE: this relates to equipment for drilling deep oil and gas wells. Mechanized racks have ramp with built-in trough pivotally connected to derrick of drilling rig. Connected to derrick rig at both sides of ramp are right-hand and left-hand racks of framed structure. Mounted on racks is gantry crane movable along gallery. Cantilever parts of racks are connected with rack supports, and pivotally mounted in their lower parts are platforms with screw jacks. Pivotally mounted between racks is tipping platform which is extension of ramp. Working horizontal position of ramp and tipping platform is fixed by lock. Work zone of racks over perimeter is guarded by hand-railing. Design of mechanized racks ensures full power operation of delivering casing and drill pipes to drilling platform level by means of gantry crane and permits reduction of service team by half with no need of boom crane in pipe handling procedure. EFFECT: high efficiency. 1 cl, 2 dwg

Description

 Rigs of the drilling rig belong to the equipment for deep hole drilling of oil and gas wells, being a modernization of the existing receiving bridges of drilling rigs (BU).

 Known receiving bridges of drilling rigs BU-2500 EUK, BU-3000 EUK, consisting of inclined and horizontal ladders, tool platform, support racks for pipes and supporting a horizontal ladder, supported by soil [1, 2] Free installation of a horizontal ladder involves supporting it on three rows of shelving. The inclined ladder with its upper end is pivotally attached to the mast-winch block (VLB), and the lower one rests on the horizontal ladder or is held by struts, both in the working and in the transport position. When moving the drill in the bush, the inclined ladder is raised relative to the upper hinge, moving together with the drill, and the horizontal ladder, with the help of tractors, moves separately along the support racks to a new position.

 Casing pipes, when feeding them to the drilling rig, are manually rolled along the racks onto the horizontal ladder, and then they are dragged to the VLB site by a drag winch along the inclined ladder.

 The disadvantage of this design of the receiving bridges is their large mass, the isolation of the horizontal ladder design, the low level of mechanization and the high complexity of the work of feeding pipes to the rig.

 The closest technical solution is the receiving bridge of the drilling rig [3]. This design consists of an inclined and horizontal gangways articulated to each other, as well as a mechanism for adjusting the position of the hinge, and the horizontal gangway is rigidly connected to the supports of the racks. The swivel connection of the ladders made it possible to reduce the number of supports of the rack to two, and their rigid connection with the horizontal ladder allows the control unit to move with the raised receiving bridge, which reduces the complexity of installation and dismantling works.

 But this design of the receiving bridge does not provide the full mechanization of the supply of pipes to the VLB drilling site, since manual operations (moving and rolling pipes on horizontal sections of the bridge, etc.) have not been reduced in the work technology.

 In order to ensure the mechanization of pipe feeding processes with the minimum labor input to the drilling site, to reduce the complexity of installation and dismantling operations when moving the drill in the bush, etc., it is necessary to create the possibility of directly feeding pipe packets from the vehicle to the level of the drilling site by fixing the cantilever a bridge carrying hoisting equipment.

 This problem can be solved by hanging on the VLB of the rig symmetrically to the existing ladder, two L-shaped racks with flooring at the level of the drilling site. The result is a working platform for storing pipes. To unload pipes from vehicles that have the ability to travel under the shelves, an overpass with a crane is installed on the latter.

 The drawings show the construction of mechanized racks, where in FIG. 1 is a side view, and FIG. 2 view of the shelving from above.

 The mechanized shelving units of the control unit consist of a ladder 1 with a built-in trough pivotally mounted in the upper part to the VLB of the drilling rig 2. On both sides of the ladder 1, the right 3 and left 4 racks of the frame structure are attached using eyelets and fingers 6. On racks 3, 4, a crane beam 7 is installed, moving along the overpass 8. The cantilever parts of the racks 3, 4 are connected to the supports 9, in the lower part of which pads 10 with screw jacks are pivotally attached.

 Between racks 3 and 4, to one of the racks a hinged platform 5 is pivotally attached, which is, as it were, a continuation of the ladder. In the working horizontal position, the ladder 1 and the hinged platform 5 are fixed with clamps 11. The working area on the shelves is fenced with a railing 12. The upper surfaces of the shelves 3, 4 and the hinged platform 5, as well as the ladder 1, are covered with expanded metal sheet. Pipes are supplied to the racks as follows: a vehicle with pipes is installed under the racks 3, 4 with the ladder 1 lowered to the ground and the folding platform 5 down (if necessary).

 Packages of pipes from the vehicle are fed through the opening formed between the racks, with the ladder 1 and the folding platform 5 lowered, and laid out on the left 3 and right 4 racks. After the lifting and transport operations with the pipes, the ladder 1 and the platform 5 are lifted by the crane beam 7 to a horizontal position and secured with clamps 11. As necessary, the pipes from the storage area by the crane beam 7 are fed to the ladder 1 and lifted by the hoist to the gutter of the ladder onto drilling site.

 When moving the control unit in the bush, the platforms with jacks 10 rotate on hinges relative to the racks 9 to the side, providing the necessary clearance between the ground and the support racks 9 of the racks 3, 4. In the working position, the platforms are returned to their original position, and with the help of jacking platforms 10 they compensate for possible irregularities in the soil, exclude biased loads in the metal structures of the racks, and also transfer a significant part of the weight loads from the racks to the ground.

 The proposed design of mechanized racks will allow to fully mechanize, as well as reduce the complexity and duration of loading and unloading and technological work on the supply of casing and drill pipes to the drilling site. The use of mechanized racks eliminates the use of a jib crane for unloading pipes onto racks from a vehicle (BU-3000 EUK, etc.), followed by rolling them onto horizontal sections of the receiving bridge, and also reduces the number of shift workers by 2 times.

Claims (2)

 1. Mechanized racks of a drilling rig containing a gangway with a trench pivotally connected to a tower block, characterized in that they have left and right racks symmetrically located in relation to the gangway and pivotally attached to the tower block, a flyover with a crank, mounted on racks, a folding platform pivotally attached to one of the racks and in the working position is a continuation of the ladder, moreover, the racks are made of a L-shaped frame-type design, on the supporting racks of which rnirno fixed platform with jacking screw fixation assembly and working positions, and the ladder adapted to be mounted in an inclined position.  2. Shelving according to claim 1, characterized in that the gangway and the folding platform in the working position are fixed with clamps.

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