SU968345A1 - Apparatus for preventing drilling mud splashing - Google Patents

Description

The invention relates to a drilling technique and technology, in particular, to a technique that prevents spraying of drilling fluid during undocking of the next pipe from the drill pipe string during the lifting of the drill tool, and can be used in those sectors of the economy where protection against liquid spray during pipe undocking is necessary in the process of lifting from vertical wells.

Known devices against spraying of the washing solution, including a housing, sealing cuffs, a shutter and a drain pipe [1].

The disadvantage of these devices is the need for their set according to the diameters of the used drill pipes, spontaneous opening of the lock during hydraulic shocks (lifting the tool with a siphon) during operation, as well as the low efficiency of the drain system.

The closest technical solution to the invention is a device for preventing spraying of the drilling fluid, comprising a housing, sealing elements mounted at its ends, a shutter and a drain pipe mounted in the lower part on the side surface g of the housing.

The device is designed to work on drilling rigs, where the open-circuit groove system (where the drain is carried out) is laid directly at the working site [2].

However, certain changes in the layout of the equipment at the work site make these devices 15 unsuitable for use in these conditions. So, for example, for drilling rigs made with a continuous flooring of the working area without accessing the trough 20 of the system, the known device is unsuitable for use, since it excludes the possibility of draining the drilling fluid into the borehole circulation system through the lateral branch pipe 25 of the device.

The purpose of the invention is the expansion of the possibilities of using the device in installations with a different floor area and increasing the reliability of the device.

This goal is achieved by the fact that the device is equipped with chippers and spring stops placed around the perimeter in the inner cavity of the housing, installed in the upper and lower parts of the housing, respectively, but the drain pipe is concentric with the housing at its lower end and is made in the form of a funnel.

In FIG. 1 shows a device for preventing spraying of bu-10 even solution, general view; figure 2 is the same, top view.

. The device includes a housing, consisting of two halves 1 and 2, pivotally connected to each other by loops 3, a sealing element 4, a shutter 5, chippers b and spring centering stops 7 installed in the upper and lower parts of the housing, respectively. The device body is equipped with handles 8. for supplying it to the drill string and 20 closing and opening halves and ears 9 for hanging the device. The drain pipe 10 is located concentrically to the housing at its lower end.

The device operates as follows 25.

Before lifting the unscrewed pipe, when the keys are removed, the device is supplied. to the drill pipe string and closes on it so that the sealing element covers the pipe body. In this case, the spring centering stops center the device, preventing distortion, and fix it, abutting against the ends of the coupling on the drill string 35. Next, lift the unscrewed pipe, and the drilling fluid flows into the device. The jet energy is extinguished by chippers that protect the sealing element from the direct impact of the high-pressure abrasive flow of the drilling fluid, and the fluid flows into the drain pipe of the housing. Since on new drilling rigs with a continuous flooring, the lift is carried out on pneumatic wedges, the rotor liners are removed. Through the open throat of the rotor, the drilling fluid is drained directly into the circulation system of the well.

After that, open the shutter, part the halves and take the device to its original position.

The technical and economic efficiency of the invention is to increase labor safety during work related to lifting a drilling tool and draining from a mud pipe.

Claims (2)

This goal is achieved by the fact that the device is equipped with bumpers placed on the perimeter in the inner cavity of the housing and spring stops installed in the upper and lower parts of the housing, respectively, the drain connection is located concentrically to the housing at its lower end and made in the form of a funnel. FIG. 1 shows a device for preventing splashing of a drilling solution, general view; Figure 2 is the same, top view. . The device includes a body consisting of two halves 1 and 2 pivotally interconnected by loops 3., a sealing element 4, a bolt 5, from recesses 6 and spring centering stops 7 installed in the upper and lower parts of the body. equipped with handles 8. for bringing it to the drill string and closing and opening the halves and ears 9 for suspending the device. Drain pipe 10 is located concentrically to the body on its lower end. The device works as follows. Before lifting the unscrewed pipe, when the keys are retracted, the device is fed to the drill pipe string and is buried on it so that the sealing element covers the pipe body. At the same time, the spring centering stops center the device, preventing misalignment, and fix it with abutting ends coupling on the drill string. Next, lift off the unscrewed pipe, and the drilling fluid flows into the device. The energy of the jet is extinguished by the bumpers protecting the sealing element from the direct impact of the high-pressure abrasive flow of the drilling mud, and the solution flows into the drain connection of the housing. Since the new drilling rigs. having a solid flooring, lifting is carried out on pneumoclines, the rotary inserts are removed. Through the open shed of the rotor, the drilling fluid is drained directly into the circulating system of the well. After that, the shutter is opened, the halves are separated and the device is retracted to its original position. The technical and economic efficiency of the invention consists in increasing the safety of labor during work related to lifting the drilling tool and draining the drilling mud from the pipes. Claim 1. A device for preventing splashing of drilling mud, including a housing, a sealing element, a plug, and a drain nipple, characterized in that, in order to expand the possibilities of using the device in installations with different flooring of the working platform, to ensure its reliability fitted with perimeter in the internal cavity of the housing of the bumpers and spring stops installed respectively in the upper and lower parts of the housing, and the drain pipe is located end en- housing at the lower end thereof. 2. The device according to claim. the fact that the drain pipe is made in the form of a funnel. Sources of information taken into account in the examination 1. Sultanov DK Safety in drilling. Baku, Aznefteizdat, 1956, p. 89-90. 2. USSR author's certificate for application No. 2794535/03, class E 21 B 41/00, 19.79 (prototype). Unscrewed pipe Fm.1 Phi1.2