RU2769021C1 - Geophysical cable cleaning device - Google Patents

Abstract

FIELD: geophysical cable cleaning.

SUBSTANCE: invention relates to a device for cleaning a geophysical cable. The device comprises a hollow cylindrical body with a cylindrical hole, an annular clip forming a central hole in the state closed along the split planes for the passage of the cleaned geophysical cable, an elastic cuff. The hollow cylindrical body from the side surface to the center has a radial slot with a width h. The annular holder is made in the form of two semi-cylinders installed in a cylindrical hole of a hollow cylindrical body. The inner surfaces of the semi-cylinders, which form a central hole in a state closed along the parting planes, are equipped with semi-annular toothed notches, and the elastic cuff is placed in a hollow cylindrical body above the annular holder and is made tubular with a radial cut from the periphery to the center. From above, the elastic cuff has the possibility of being compressed by means of a threaded connection relative to the annular cage by a sleeve screwed from above into a hollow cylindrical body. The sleeve is equipped with a radial slot of width a from the periphery to the center. The widths h and a, respectively, of the radial cut of the hollow cylindrical body and the bushing, are greater than the diameter d of the cleaned geophysical cable. From below, the hollow cylindrical body is equipped with two longitudinal grooves located at an angle of 180 degrees with respect to each other. The hollow cylindrical body is fixed on the wellhead flange by means of L-shaped pins with a gap. The hollow cylindrical body is made with the possibility of radial displacement relative to the wellhead flange within the longitudinal slots.

EFFECT: improving the efficiency and quality of cleaning the surface of the geophysical cable, eliminating oil pollution of the working site, operating equipment and wellhead equipment, as well as the surrounding area of ​​the well, improving working conditions for operators of the geophysical lift, expanding the scope of the device.

1 cl, 4 dwg

Description

The invention relates to the oil and gas industry, in particular to devices for preventing oil pollution of the work site, operating equipment, and the surrounding area of the well when lifting a geophysical cable from the well using a geophysical lift.

A device for cleaning pipes is known (patent RU No. 2253007, publ. 27.05.2005), containing an annular clip made in the form of two separate segments, forming, in a state closed along the plane of the connector, a central hole for the passage of pipes to be cleaned with a minimum clearance, an elastic cuff, tightly covering the surface of the cleaned pipes from the outside and made with an unlimited possibility of movement in various radial directions, while the annular cage in the form of two annular segments is made with an annular cavity in which an elastic cuff is placed to provide an unlimited possibility of its movement in various radial directions, a hollow cylindrical body is made with a conical hole for installing replaceable sealing inserts, and the annular clip is installed in the conical surface of the cylindrical body and is rigidly fixed by retractable stops.

Disadvantages of this device:

- low quality of pipe cleaning and rapid uneven wear of the elastic collar due to its imperfect design, due to the fact that the elastic collar is made of rubber and is subjected to cycles of tension on the sleeve and compression on the pipe body when lifting each pipe from the well. As a result, the elastic cuff wears out and its working edge, which cleans dirt and deposits from the outer surface of the pipes, loses its elasticity and does not tightly cover the surface of the cleaned pipes from the outside. As a result, we have poor-quality cleaning of the outer surface of pipes lifted from the well;

- narrow scope of the device, so it is impossible to use for cleaning the geophysical cable when lifting from the well;

- poor working conditions for maintenance personnel, as the personnel have to work with pipes that were not properly cleaned during lifting;

- pollution of the surrounding territory of the well during repair work. This is due to the fact that the dirt remaining on the pipes after lifting the pipes from the well during the process of laying the pipes on the walkways spreads over the surrounding area of the well;

- poor environmental situation at the well, as poorly cleaned pipes are laid on the walkways;

- the work culture of maintenance personnel is decreasing, as they have to work with poorly cleaned pipes.

Also known is a pipe wellhead self-centering wiper (patent RU No. 2745503, publ. 03/25/2021), characterized in that it includes a body consisting of one or two interconnected disks with bore diameters in the center, the disks are made in the form of a crescent or a solid ring, the discs contain through holes and/or threaded connections for studs or nuts, and the holes on the upper disc have recesses, the upper disc contains upper and lower horizontal radial bores, the upper one is designed to install an elastic wiper installed in it when lowering and raising tubing (tubing) with an ESP cable, and the lower bore together with the lower disk form a cavity in which a ring is placed that is installed during the tripping of the tubing, having the possibility of horizontal rotation around its axis and the value of the working stroke in the radial direction, the ring contains an outer and an inner shoulder , the first is designed to install and fix the elastic obti rator installed during the tripping of the tubing, thanks to which the replaceable elastic wiper does not slip when the coupling or lock passes through it, and the latter for the safe passage of pipes and/or tools and/or equipment through the bore diameter of the ring and is made with chamfered or in in the form of a cone, the elastic wiper installed when lowering the tubing with the ESP cable is made in the form of a flat disk with an inner bore diameter for passing pipes with the ESP cable and protectors with cleats through it, cuts are made from the inner hole of the elastic wiper in the radial direction to form "petals", which are bent at the moment of passage of the sleeve with protectors and cleats, thereby preventing rupture and deformation of the elastic wiper; wiper installed when tripping tubing with an ESP cable, contains a lock according to the “folder-mother” principle, an elastic wiper installed when lowering the tubing, has a plate shape with an inner diameter for passing pipes through it, on one side of the elastic wiper, the outer diameter is made of G -shaped collar, which, together with the plane, forms a gap around the entire circumference for the possibility of hooking on the outer collar of the ring, handles are installed on one of the disks for ease of installation and transportation.

Disadvantages of this device:

- the complexity of the design of the device, due to the large number of components and parts;

- low quality of cleaning pipes and ESP cable extracted from the well at the same time;

- poor working conditions for maintenance personnel, which reduce the culture of production, as the personnel have to work with pipes that have been cleaned poorly during lifting;

- pollution of the surrounding territory of the well during repair work. This is due to the fact that the dirt remaining on the pipes after lifting the pipes from the well during the process of laying the pipes on the walkways spreads over the surrounding area of the well;

- poor environmental situation at the well, as poorly cleaned pipes are laid on the walkways.

The closest in technical essence is a device for cleaning sucker rods (patent RU No. 2052072, publ. 01/10/1996), including a housing with a central hole and with means of its attachment to the wellhead, consisting of two parts with a node for their fixation relative to each other, and a cleaning element located in the cavity of the body, in the form of elastic diaphragms with a central hole, while the upper part of the body is made with a slot that mates with the central hole, and the fixation assembly of the body parts is made in the form of studs and an emphasis on one part of the body and a figured slot for the studs and latches for interacting with an emphasis on another part of the body, while the elastic diaphragms are made with radial cuts with the gaps shifted by 45° in adjacent diaphragms

Device disadvantages:

- low efficiency of the device when cleaning the surface of the geophysical cable. This is due to the fact that in the process of extracting the cable from the wells, it is not centered relative to the axis of the well, while the cleaning device is fixed rigidly on the wellhead flange. As a result, there is an uneven cleaning along the perimeter of the outer surface of the geophysical cable from oil, mud, sludge, etc.;

- low quality of cleaning the surface of the geophysical cable from oil. This is due to the fact that the cleaning element, made in the form of elastic diaphragms, due to its flexibility, does not allow to clean caked sludge, dirt build-up, etc. from the surface of the geophysical cable. This leads to a decrease in the quality of cleaning the geophysical cable;

- oil pollution of the working site, operating equipment and wellhead equipment, as well as the surrounding area of the well, since the oil remaining on the geophysical cable after lifting from the well spreads over the surrounding area of the well;

- poor working conditions for the operators of the geophysical lift, as the operators have to work with poorly cleaned of oil, mud, sludge, etc. geophysical cable.

The technical objectives of the invention are to improve the efficiency and quality of cleaning the surface of the geophysical cable, to exclude oil pollution of the working site, operating equipment and wellhead equipment, as well as the surrounding area of the well, to improve the working conditions of the operators of the geophysical lift, to expand the scope of the device.

The stated technical problem is solved by a device for cleaning a geophysical cable, containing a hollow cylindrical body with a cylindrical hole, an annular clip forming a central hole for the passage of the cleaned geophysical cable in a state closed along the split planes, an elastic cuff.

What is new is that the hollow cylindrical body from the side surface to the center has a radial slot with a width h, while the annular clip is made in the form of two half-cylinders installed in the cylindrical hole of the hollow cylindrical body, and the inner surfaces of the half-cylinders, forming a central hole, are equipped with semi-annular toothed notches, and the elastic cuff is placed in a hollow cylindrical body above the annular cage and is made tubular with a radial cut from the periphery to the center, and from above the elastic cuff can be pressed with a threaded connection relative to the annular cage by a sleeve screwed from above into the hollow cylindrical body, and the sleeve is equipped with a radial slot of width b from the periphery to the center, while the widths h and a, respectively, of the radial slot of the hollow cylindrical body and the sleeve, are greater than the diameter d, from below the hollow cylindrical body is equipped with two prolongations With slots located at an angle of 180 degrees with respect to each other, the hollow cylindrical body is fixed by means of L-shaped pins with a gap on the wellhead flange, and the hollow cylindrical body is made with the possibility of radial displacement relative to the wellhead flange within the longitudinal grooves.

In FIG. 1 shows a longitudinal section of the proposed device for cleaning a geophysical cable.

In FIG. 2 is a plan view of a geophysical cable cleaning device.

In FIG. 3 shows a section A-A of a device for cleaning a geophysical cable.

In FIG. 4 shows a B-B section of a device for cleaning a geophysical cable.

Device for cleaning geophysical cable contains a hollow cylindrical body 1 (see Fig. 1 and 4) with a cylindrical hole 2 (see Fig. 1, 3). The hollow cylindrical body 1 from the side surface to the center has a radial slot 3 (see Fig. 1) with a width h, in which the annular clip 4 is installed (see Fig. 1, 3).

The annular clip 4 (see Fig. 1 and 3) is made in the form of two semi-cylinders (4' and 4"), installed in a cylindrical hole 2 of the hollow cylindrical body 1. The inner surfaces of the semi-cylinders 4' and 4", forming a condition, the central hole is equipped with serrated notches 5' and 5" (see Fig. 1 and 3), respectively.

The elastic cuff 6 (see Fig. 1 and 4) is placed in a hollow cylindrical body 1 above the annular clip 4 and is made tubular with a radial cut 7 (see Fig. 4) from the periphery to the center.

From above, the elastic cuff 6 (see Figs. 1 and 4) has the ability to be compressed relative to the annular holder 4 by a sleeve 8 (see Figs. 1, 2, 4) screwed from above into a hollow cylindrical body 1. The hollow cylindrical body 1 is equipped with an external thread 9 (see Fig. 1 and 3), and the sleeve 8 has an internal thread 10 (see Fig. 1 and 4).

The sleeve 8 is equipped with a radial slot 11 (see Fig. 1) with a width - a from the periphery to the center, while the width h and a, respectively, of the radial slot 3 and 11 of the hollow cylindrical body 1 and the sleeve 8, respectively, is greater than the diameter d.

From below, the hollow cylindrical body 1 is equipped with two longitudinal grooves 12' (see Fig. 1 and 2) and 12 "located at an angle of 180 degrees with respect to each other, with a length equal to, for example, 20 mm.

Hollow cylindrical body 1 by means of L-shaped pins 13' and 13" (see Fig. 1 and 2), for example, by means of retainers 14' and 14" (see Fig. 1), made in the form of cotter pins with a gap - b, is fixed on the wellhead flange 15 (see Fig. 1) of the well.

In the process of cleaning the geophysical cable 16 (see Fig.1, 3, 4) when lifting it from the well, the hollow cylindrical body 1 has the possibility of radial displacement in order to center the device relative to the wellhead flange 15 of the well within the longitudinal grooves 12' and 12" (length - c), and the semi-cylinders 4' and 4" of the annular clip 4, with their respective toothed notches 5' and 5" have the ability to clean the geophysical cable 16 from caked and compacted dirt or sludge, and the elastic cuff 6 cleans oil from the geophysical cable 16.

The device works as follows.

Before lifting the cleaned geophysical cable 16 from the well, a geophysical cable 16 is threaded (see Fig.1 and 3), for example, with a diameter: d=12 mm through its radial slot 3 with a width - h, for example h=20 mm. Next, a hollow cylindrical body 1 is installed and fixed on the wellhead flange 15 of the well. To do this, combine the longitudinal grooves 12' and 12 "located at an angle of 180 with respect to each other, with the corresponding holes 17' and 17", made in the mouth flange 15. Insert the L-shaped pins 13' and 13 "in the corresponding longitudinal grooves 12' and 12" of the hollow cylindrical body 1 and holes 17' and 17", in the wellhead flange 15. Further, using the clamps 14' and 14", made in the form of split pins, the hollow cylindrical body 1 is fixed on the wellhead flange 15 with a gap b , for example b=5 mm.

Then, in the cylindrical hole 2 of the hollow cylindrical body 1, an annular clip 4 is installed (see Fig. 1 and 3), made in the form of two half-cylinders (4' and 4 "), forming a central hole in a state closed along the parting planes, through which a geophysical cable 16, covered from the outside with notches 5' and 5", corresponding half-cylinders 4' and 4".

Next, through the radial cut 7 of the elastic cuff 6, a geophysical cable 16 is threaded, setting the latter in the center of the elastic cuff 6, which is made tubular.

An elastic cuff 6 is installed on the annular clip 4, after which the sleeve 8 is inserted (see Fig. 1, 2 and 4) with a radial slot 11 with a width - a, for example, a = 20 mm, into the geophysical cable 16 (d = 16 mm) and the sleeve is wrapped 8 on the upper end of the hollow cylindrical body 1, pressing the elastic cuff 6 from above.

After that, the lifting of the cleaned geophysical cable 16 begins. In the process of lifting the cleaned geophysical cable 6 from the well, the annular clip 4 (see Fig. 1) covers the outer surface of the cleaned geophysical cable 16, preventing contaminants in the form of caked and compacted mud or sludge to rise above devices, grinding them into sand, while, located above the annular clip 4, the elastic cuff 6 on the one hand cleans off the surface of the geophysical cable 16 (oil, drilling fluid, crushed sand and sludge), and on the other hand, the elastic cuff 6 acts as an elastic damper, providing uniform compression of the outer surface of the cleaned geophysical cable 6 and reducing the load on the lifting device (not shown in Fig. 1, 2, 3, 4) in the process of extracting the geophysical cable from the well. As the geophysical cable 16 is removed from the well, in case of contamination on the surface of the geophysical cable 16 above the bushing 8, the bushing 8 is tightened with the internal thread 10 on the external thread 9 of the hollow cylindrical body 1.

The efficiency of cleaning the surface of the geophysical cable is increased. This is due to the fact that in the process of extracting the geophysical cable from the well, it self-centers relative to the axis of the well, due to the fact that the hollow body has the possibility of limited radial movement by a length L, for example, equal to 40 mm, and the fact that the hollow cylinder is fixed on the wellhead flange with a gap - b allows the hollow cylindrical body 1 to move radially relative to the wellhead flange 15 in the process of self-centering of the geophysical cable 16 relative to the device. As a result, there is a uniform cleaning around the entire perimeter of the outer surface of the geophysical cable from oil, mud, sludge, etc.

The quality of cleaning the surface of the geophysical cable from oil is improved. This is due to the fact that at first the sintered sludge, the build-up of mud is ground due to the gear notches 5' and 5", made on the corresponding half-cylinders 4' and 4" of the annular clip 4, and then the tubular elastic cuff 6 cleans oil, drilling oil from the surface of the geophysical cable 16 mortar, ground sand and sludge. This allows you to qualitatively clean the geophysical cable 16.

Oil pollution of the working site, operating machinery and wellhead equipment, as well as the surrounding area of the well is excluded, since oil does not remain on the geophysical cable after lifting from the well and does not spread over the surrounding area of the well.

The working conditions of the operators of the geophysical lift are improving, as the operators work with well-cleaned from oil, mud, sludge, etc. geophysical cable.

The proposed device for cleaning the geophysical cable allows you to:

- increase the efficiency of the device for cleaning the surface of the geophysical cable;

- improve the quality of cleaning the surface of the geophysical cable from oil, mud, sludge, etc.;

- exclude oil pollution of the working site, operating machinery and wellhead equipment, as well as the surrounding area of the well;

- improve working conditions for geophysical lift operators.

Claims (1)

A device for cleaning a geophysical cable, comprising a hollow cylindrical body with a cylindrical hole, an annular clip forming, in a state closed along the split planes, a central hole for the passage of the cleaned geophysical cable, an elastic cuff, characterized in that the hollow cylindrical body has a radial slot from the side surface to the center width h, while the annular clip is made in the form of two semi-cylinders installed in a cylindrical hole of a hollow cylindrical body, and the inner surfaces of the semi-cylinders, which form a central hole in a closed state along the parting planes, are equipped with semi-annular toothed notches, and the elastic cuff is placed in the hollow cylindrical body above of the annular cage and is made tubular with a radial cut from the periphery to the center, and from above the elastic cuff can be pressed by means of a threaded connection relative to the annular cage with a sleeve screwed from above into the hollow cylindrical body, and the sleeve is equipped with a radial slot of width a from the periphery to the center, while the widths h and a, respectively, of the radial slot of the hollow cylindrical body and the sleeve, are greater than the diameter d of the cleaned geophysical cable, from below the hollow cylindrical body is equipped with two longitudinal grooves located under at an angle of 180 degrees relative to each other, the hollow cylindrical body is fixed on the wellhead flange by means of L-shaped pins with a gap, and the hollow cylindrical body is made with the possibility of radial displacement relative to the wellhead flange within the longitudinal grooves.

Images