RU120740U1 - SEALING HOLE DRILLING DEVICE FOR PIPELINES UNDER PRESSURE FOR INSTALLING MANOMETERS OR PRESSURE SENSORS - Google Patents

Abstract

A device for sealed drilling of holes in pipelines under pressure for installing pressure gauges or pressure sensors, containing a housing with a spindle with a drill and a sealing unit located in it, characterized in that the spindle in the device with the possibility of rotational movement and axial movement inside the housing is fixed with a standard drill by means of a mounting screw, in the body of the device there is a narrowing of the diameter of the through hole to prevent extrusion of the spindle with the drill, the seal of the spindle and the body is provided by a gland packing, which is fixed by a sleeve and is adjusted with a nut.

Description

The invention relates to the field of transportation of oil and gas, in particular, to devices for tapping into existing pipelines.

The most important parameter in the process of transporting oil and gas is the measurement of flow pressure in the pipelines. The use of manometers or pressure sensors as pressure meters allows you to control the mode of movement of liquid media (including in automatic mode), ensure accident-free and environmental safety of oil and gas transportation, and increase labor productivity.

Installation of instruments for measuring pressure is provided for on new pipelines, during the construction period, and on the existing ones, during a stop during the production of current repairs. Insertion of instruments on existing pipelines without stopping the oil and gas transportation process is rarely used due to the high cost of the insertion measure into the pipeline. As a rule, the insert into the pipeline is made through a pre-welded nozzle with a flange and an installed full bore valve with a special drilling installation [1]. After dismantling the drilling installation with a cut-out section of the pipeline wall, a pressure gauge can be mounted to the valve.

Closest to the technical nature of the claimed device is a tapping device in the pipeline for the installation of corrosion control nodes [2]. The device is intended for the treatment of pipeline openings and corrosion monitoring in field and main pipelines. The device consists of a housing with a spindle located in it, connected by a ring to a drill; rotation and feed mechanism; sealing assembly.

The disadvantages of the device insertion into the pipeline for the installation of corrosion control nodes, considering the example of the installation of pressure gauges, should include:

- large overall dimensions of the device (1190x3 92 mm);

- use of a special drill with a large diameter of 22 mm;

- restriction on the wall thickness of the processed pipeline (not more than 12 mm);

- the presence of independent rotation and supply mechanisms increases the mass of the device;

- the use of ball valves of large diameter PN 40T / 50;

- the need for two operators when working with the device.

The aim of the invention is the adaptation of a device for drilling holes in pipelines under pressure for the subsequent installation of pressure gauges or pressure sensors.

To achieve this goal, in the hermetic drilling device, the spindle with the possibility of rotational movement and axial movement inside the housing is fixed with a standard drill by means of a fixing screw, in the device case there is a narrowing of the diameter of the through hole to prevent extrusion of the spindle with the drill, the seal of the spindle and housing is provided with stuffing box packing, which is fixed by a sleeve and tightened by a nut.

An input device must be used to install a hole-drilling device. The components of an input device are:

- fitting (welded onto the pipeline);

- ball valve DN 15 PN 40 (used to open-close access to the pipeline).

To install a pressure gauge or pressure sensor after processing the holes, screw the corresponding adapter into the threaded part of the ball valve.

The essential features characterizing the invention are that in the hermetic drilling device the spindle with the possibility of rotational movement and axial movement inside the housing is fixed with a standard drill by means of a fixing screw, in the device case there is a narrowing of the diameter of the through hole to prevent extrusion of the spindle with the drill, spindle seal and the housing is provided with stuffing box packing, which is fixed by a sleeve and tightened with a nut. The essential features provide a technical result: adaptation of a device for drilling holes in pipelines under pressure for the subsequent installation of pressure gauges or pressure sensors. Thus, the essential features are in a causal relationship with the achieved technical result.

The technical essence is illustrated by the drawing of the device for drilling holes in the section shown in figure 1. Figure 2-5 shows the process of drilling and installing a pressure gauge. Figure 6 presents a drawing of the installation of the device in a hand drill.

The housing 1 of the tight-hole drilling device contains a spindle 2 with a standard drill 7 (06 mm), which is fixed in the spindle with a fixing screw 4. A spindle with a drill is installed in the housing 1. In the housing of the device there is a narrowing of the diameter of the through hole 3 to prevent extrusion of the spindle with the drill. The sealing of the spindle and housing is provided by stuffing box packing 8. Packing box is fixed by sleeve 6 and adjusted by nut 5.

The process of drilling and installing a pressure gauge involves four main steps.

Stage number 1. Fitting 9 is welded onto the pipeline. A ball valve 10 (DN 15 PN 40) and a tight drilling device are sequentially screwed in the open position in the fitting. The spindle 2 of the device is fixed in the cartridge 11 of a hand drill. The handle of the drill rotates, making drilling of the pipeline wall. At the end of the drilling process, the drill has the ability to move freely up and down, the drill turns in any position freely, without jamming.

Stage number 2. At the end of the drilling process, the drill is retracted into the cavity of the device. A ball valve is actuated, which hermetically closes the through hole.

Stage number 3. The tight drilling device is unscrewed from the ball valve. An adapter 12 is screwed onto a ball valve and a pressure gauge 13 is installed.

Stage number 4. To measure the passage pressure in the pipeline, a ball valve opens.

When using the device, all installation screw connections must be sealed with fum tape.

The positive impact of the use of a tight hole drilling device on pipelines for installing pressure gauges or pressure sensors on the operation of pipelines is as follows:

- the ability to control the passage pressure;

- timely detection of failures;

- reducing the risk of paraffin and sand deposits;

- identification of malfunctions or overlapping valves. Tests of the proposed pressure-tight hole drilling device for field pipelines for installing pressure gauges or pressure sensors showed that it corresponds to its technical affiliation.

Sources of information taken into account

1. RD 39-132-94. Rules for the operation, inspection, repair and rejection of oil field pipelines. / IPTER. Ufa, 1994. -23 p.

2. A device for installing corrosion and tie-in control units in the pipeline and units of the Monicor-Probe system. Passport and operating instructions FS1B.OO.OOO PS.- Ufa, 2005. - 8 p.

Claims (1)

A device for tightly drilling holes in pipelines under pressure for installing pressure gauges or pressure sensors, comprising a housing with a spindle with a drill and a sealing assembly, characterized in that the device includes a spindle with rotary movement and axial movement inside the housing that is secured with a standard drill using a fastener screw, in the housing of the device there is a narrowing of the diameter of the through hole to prevent extrusion of the spindle with a drill, the seal of the spindle and the housing about effectiveness to stuffing box packing, which is fixed and regulated sleeve nut.