RU2548270C1 - Drilling rig operation method - Google Patents

Abstract

FIELD: oil-and-gas industry.

SUBSTANCE: drilling rig operation method includes drilling in the state lifted above rails, lowering on rails, engagement of wheels of the rig with rails and movement between wells by the rig wheels on rails. The railtrack is mounted on concrete blocks above ground at least 2 m and is formed from separate mobile blocks. When moving the rig between wells the units well alternately rearranged and the drilling rig is moved on rails between blocks. When drilling the drilling rig is placed in the middle point of pair of blocks on rails, the rig is rested on rails and is lifted to the height providing a possibility of contact of lateral surfaces of wheel ribs with rails.

EFFECT: performance improvement.

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Description

The invention relates to the oil industry and may find application in the operation of a drilling rig when drilling a wellbore.

There is a known system for moving a rig-winch block of drilling rigs for cluster drilling of wells, in which the rig-winch block moves in any direction separately from other main rig systems located motionless on the cluster site, including supporting bases connected to an elevated base, and, according to at least four jack supports connected to a raised base. The jack support of the moving system includes a support mat on which at least two rails are located, a horizontal movement hydraulic cylinder and a vertical movement hydraulic cylinder with a cylinder support, a trolley configured to rotate the support mat around a vertical axis, rail grips with cylindrical rollers connected to the trolley ( RF patent No. 2459062, CL E21B 7/02, E21B 15/00, published on 08.20.2012).

Closest to the invention in technical essence is a device for moving the drilling rig and aligning the position of the tower block, containing guides, a node for moving the drilling rig along the guides, the base of the tower block, equipped with four-wheeled traveling trolleys moving along the guides, jacks for lifting and lowering the base of the tower block . Jacks are installed at the base of the tower block with the possibility of stopping the rods in the upper part of the chassis of the undercarriage, the guides are a rail made in the form of a frame with two rails at the edges to move the undercarriages, each of which contains two pairs of wheels interconnected by two four-axle balancers in the form of a parallelogram, while the device contains beams with screw supports for aligning the transmission of force during drilling. When operating a drilling rig, its movement from well to well is carried out on rails, and during drilling, the rig is lifted on jacks above the rails (RF Patent for Utility Model No. 137053, class E21B 15/00, published on January 27, 2014 - prototype).

A disadvantage of the known technical solutions is the complexity of the rail track on the entire section of drilling a wellbore, insufficient reliability of fixing the installation in a state raised above the rails.

The invention solves the problem of simplifying the formation of the rail track and moving the drilling rig and improving the reliability of fixation in a raised state.

The problem is solved in that in a method of operating a drilling rig, including drilling in a state raised above the rails, lowering onto rails, contacting the rig wheels with rails and moving the rig wheels along the rails from well to well, according to the invention, the rail track is mounted on concrete blocks above the ground at least 2 m and formed from separate mobile blocks, when moving the unit from well to well, the blocks are alternately rearranged one after another and the rig is moved with wheels about rails from one block to another, when drilling, the drilling rig is placed in the middle of a pair of blocks on the rails, the installation is supported on the rails and the installation is lifted to a height that allows the side surfaces of the wheel flanges to contact the rails.

SUMMARY OF THE INVENTION

The implementation of a long rail track in the conditions of cluster drilling is very problematic due to the need to move equipment around the rig. The long duration of drilling a wellbore leads to repeated negative impacts on the rail track, violates its integrity, leads to the need for its repeated restoration, and fixing the installation when it is raised above the rails is not reliable enough. The invention solves the problem of simplifying the formation of the rail track and moving the drilling rig and improving the reliability of fixation in a raised state. The problem is solved as follows.

The rail track is laid on a continuous concrete block with a height of at least 2 m. Thereby, the rails and the drilling rig are lifted by at least 2 m above the ground. To place the drilling rig, a pair of such blocks are used transversely connected to each other. At least 4 such mobile units are used to move the rig.

In FIG. 1 shows a diagram of a drilling rig moving from one pair of blocks to another. In FIG. 1, the following designations are adopted: 1 - drilling rig, 2 - wheels of the platform of the brown rig, 3 - rails, 4 - concrete block.

When drilling, the drilling rig 1 with wheels 2 is placed on the rails 3 in the middle of a pair of blocks 4, the installation is supported on the rails and the installation is lifted by jacks to a height that allows the side surfaces of the wheels to contact the rails. The lifting height is not more than the height of the flange of the wheels.

In FIG. 2 shows a diagram of a rig in an elevated state. In FIG. 2 the following designations are accepted: 2 - wheel, 3 - rail, 4 - concrete block, 5 - wheel flange.

Drilling a well. When moving to a new well next to the block on which the drilling rig is located, level the base, pour crushed stone, install a second pair of blocks, join the rails of the blocks and move the drilling rig along the rails to a new pair of blocks.

The drilling rig moves itself, as it were, due to the hydraulic cylinders. They work on the “push-pull” principle, that is, they can both attract and repel. For this purpose, stops are fixed on the rails and inclined hydraulic cylinders rest on them. By supplying liquid under pressure to the hydraulic cylinders, the rods of the hydraulic cylinders and, accordingly, the drilling rig are moved. The drilling rig moves along with drill pipes, downhole motors located on the working platform of the machine. Consequently, time-consuming work on unscrewing the drill pipe string and laying them away from the tower is excluded. This greatly facilitates the work of the drill, makes it safer.

Before moving the rig from rail to rail, the wheels of the rig are adjusted to the edge of the rail and stopped to begin moving. The move itself is performed in one stroke of the hydraulic cylinder rods without stopping.

The contacting of the wheels of the drilling rig with the rails is constantly organized, without stopping when drilling the well, because the rig is lifted by jacks above the rails to a minimum height, providing the possibility of contacting the side surfaces of the wheel flanges with the rails. This increases the reliability of mounting the rig on rails when drilling a well.

Concrete example

Perform cluster drilling of 6 oil wells located in a row. The distance between the wells is 18 m. 4 sections are mounted on reinforced concrete blocks with dimensions: length 9 m, height 2.5 m and width 2 m. A rail track is mounted on each block. There are 4 such blocks. Thus, the rails are raised above the ground by 2.5 m. The width between the blocks is 10 m. At the site of the first well, the site is leveled, crushed stone is poured and 2 reinforced concrete blocks with rails are installed on top. The drilling rig is placed in the center of a pair of blocks. The wheels of the rig are supported on rails. The jacks of the drilling rig are supported on the rails and the jacks raise the drilling rig 1 mm above the rails, so that the wheel flanges do not extend above the rail. Drilling is performed in a state raised above the rails. At the end of drilling, the wheels are lowered onto the rails, providing full contact of the installation wheels with the rails. Next to the blocks on which the drilling rig is located, the base is leveled, crushed stone is poured, a second pair of blocks are installed with their ends facing each other. Blocks and rails are fixed from displacement relative to each other. The rig is moved by wheels along the rails from one pair of blocks to another. When moving wheels from one rail to another, they organize non-stop movement. After moving the drilling rig from one pair of blocks to another, a vacant pair of blocks is moved to the ends of the blocks with the drilling rig, fixed from displacement and the drilling rig continues to move in the direction of the new well. Thus, the rig is moved from well to well by the wheels of the rig along the rails.

The transition from point to point is carried out in 13 movements. Each of 13 movements takes about 8 minutes. The total travel time from point to point is 1 hour 45 minutes. Monitoring the position of the rig when moving is carried out visually.

Application of the proposed method will solve the problem of simplifying the formation of the rail track and moving the drilling rig and improving the reliability of fixation in a raised state.

Claims (1)

A method of operating a drilling rig, including drilling in a state raised above the rails, lowering onto the rails, contacting the rig wheels with the rails and moving the rig wheels along the rails from the well to the well, characterized in that the rail track is mounted on concrete blocks above the ground not less than 2 m and formed from separate mobile blocks, when moving the unit from well to well, the blocks are alternately rearranged one after another and the rig is moved with wheels along rails from one block to another, when drilling, the drilling rig is placed in the middle of a pair of blocks on the rails, the installation is supported on the rails and the installation is lifted to a height that allows the side surfaces of the wheel flanges to contact the rails.

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