Retaining device inserted into central channel of pipe component of drilling string and appropriate pipe component of drilling string

FIELD: mining.

SUBSTANCE: retaining device (13) inserted into a central channel of a drilling string component. The channel has the first diameter on at least a part of the central section of the drilling string component, and the second diameter near the ends of the drilling string component. The second diameter is less than the first diameter. The retaining device (13) comprises a lengthy body (14), forming at least partially a jacket for a transfer line. The lengthy body (14) has transverse dimensions less than the second diameter. Multiple arc elements (15) are arranged along the lengthy body (14). Arc elements are separate from the lengthy body and are attached to it.

EFFECT: arc elements are elastically bending for provision of their displacement through the second diameter and have the largest chord that is more than the first diameter in free condition for creation of an opportunity of expansion in the first diameter after stretching via the second diameter.

3 cl, 9 dwg

 

The present invention relates to the drilling of oil and gas wells and, in particular, to devices and instruments for the transfer of information on the drill columns.

Tubular components of the drill string include, without limiting this, drill pipe, heavy weight drill pipe, the layout of the bottom of the drill string, subs, and a leading drill pipe.

In the oil and gas industry in drilling use different sensors for the measurement of underground geological formations, the status of downhole tools, environments, etc.

Measurement data necessary for the operators and engineers, located on the surface. Measurements can be taken at various points along the drill string. These measurements can be used to determine the drilling parameters, such as the direction of drilling rate of penetration, etc. for exact opening oil reservoir or collector, other mineral raw materials.

Measurement data must be transmitted to the earth's surface. Conventional means, such as using ripple mud, have a very low data rate. Attempts are being made to data transmission lines, such as electrical cables, entered directly in the components of the drill is Ronny, such as sections of drill pipe.

The electrical contacts or other elements of the transmission systems, such as electromagnetic induction coupling is used to transfer data through the locks of the tool or connector locks into the drill string.

The placement of transmission lines in the channel, made in the wall of the component columns, can weaken the wall where this wall is thin, for example, in the Central part of the drill pipe or when the wall is thicker in this area (heavy weight drill pipe, heavy weight drill pipe...), but locally is more subtle and may not run channel. When placing the transmission line in the Central channel back to the wall, the transmission line is exposed to drilling fluids and tools or other substances or objects passing through the Central channel. While the transmission line may be damaged.

Section of the drill string can be bent, for example, when horizontal drilling. The transmission line may be damaged by bending, if the transmission line is attached to the wall of the adhesive coating, which may crack or peel off from the inner surface of the Central channel, if it is not protected by the adhesive coating.

Know the use of a sleeve inserted into the channel component of the drill number is NY. However, the sleeve is not easy to place inside the Central channel, especially when the component of the drill string has a small diameter near its ends. The sleeve reduces the flow area of the flow component of the drill string, thus increasing the pressure loss in the column.

The invention provides a considerable improvement of the downhole drill string, equipped to transmit information.

Based on the above, the retaining device is inserted into the Central channel of the component of the drill string. The Central channel has a first diameter in the Central part of the component of the drill string and a second diameter near the ends of the component of the drill string, and a second diameter less than the first diameter. The retaining device includes an elongated housing forming at least part of the casing for the transmission line and having transverse dimensions less than the second diameter, and a set of arch elements located along the elongated body, separate from the elongated body and attached thereto. Arched elements are elastically bent to create their travel through the second diameter, and have the greatest chord is greater than the first diameter in a free state to create opportunities for expansion in the first diameter after passing through the second diameter.

Pipe component of the drill string contains tubular element and the retaining device is inserted into it. Pipe element has a Central channel having a first diameter at the Central part of the tubular element and a second diameter near the ends of the tubular element, and a second diameter less than the first diameter, with the retaining device is inserted into the Central channel of a tube element. The retaining device includes an elongated housing forming at least part of the casing for the transmission line and having transverse dimensions less than the second diameter, and a set of arch elements located along the elongated body, separate from the elongated body and attached thereto. Arched elements are elastically bent to ensure that they move through the second diameter, and have the greatest chord is greater than the first diameter in a free state to extend in the first diameter after passing through the second diameter.

In one embodiment, the arched elements have a length larger than the inner perimeter of the Central section of the pipe, but their ends are at a distance from each other.

The invention will become more clear from the following description and drawings. These drawings illustrate only typical non-limiting implementation options.

On Fig shows a cross-section of a component of a variant of implementation of the drill string.

Figure 2 shows an isometric view of the restraint in the component of the drill string.

Figure 3 shows an isometric view of the restraint in the free state.

Figure 4 shows an isometric view of the arched element mounted on the case.

Figure 5 shows an isometric view of the arch element and the element size decrease.

Figure 6 shows an isometric view of the introduction of the restraint component in the drill string.

Figure 7 shows the cross-section of a variant of implementation of the elongated body.

On Fig shows the cross-section of a variant of implementation of the elongated body.

Figure 9 shows the cross-section of a variant of implementation of the elongated body.

It should be clear that the components described and shown in the figures, can be placed in different configurations and have a different design. The following more detailed description of the devices of the present invention shown in the figures, is not intended to limit the scope of the claimed invention, but only represents the various selected embodiments of the invention and may, if necessary, serve to complement the definitions of the invention. Shown embodiments of the invention shall become clearer thanks to the drawings, in which identical parts are everywhere marked the same positions.

Specialist in the art it should be clear that various modifications of the devices described herein can be performed without departing from the scope of the invention described herein and shown in the figures.

Thus, the following description of the figures gives only examples and just shows some selected embodiments of corresponding to the invention of this application.

A drilling rig is used for carrying the components of the drill string for drilling the wellbore. Several components of the drill string to form at least a section of the drill string. In operation, drilling fluid is normally supplied under pressure from the drilling rig through the drill string. Drill string can rotate the rig to rotate the drill bit mounted on the lower end of the drill string. Circulation of drilling fluid under pressure to carry out the lower end of the drill string in its channel and back to the surface outside the drill string to provide washing and removal on the surface of the drill cuttings. Rotation of the drill bit may alternatively be performed by other components of the drill string, such as oil hydraulic motors or drilling curb the engines, side by side with the drill bit. Other components of the drill string includes a drill pipe and downhole instrumentation, such as tools, logging while drilling and blocks sensors. Other necessary components of the drill string includes centralizers with rigid blades, spreaders, heavy-weight drill pipe, heavy weight drill pipe, subs, rasburicase, rotary managed systems, drilling Iasi and drilling absorbers are well known in the drilling industry.

In the application for U.S. patent 2005/0115017 proposed liner inserted into the Central channel of the component of the drill string. The sleeve includes an elastic material, initially in the form of a rectangular sheet held essentially in a cylindrical form. The external diameter of the socket is changing to ensure the insertion of the liner in the narrowed channel component of the drill string near the coupling end or nipple end.

After passing through the narrowed channel external diameter of the socket is automatically expanded in the Central channel of the component of the drill string. The external diameter of the sleeve may expand in contact with the inner surface of the Central channel. The ends of the sleeves are then overlapped. The contents of the specified document on the but in the present application by reference.

U.S. patent 6516506 also discloses a sleeve, rolled into a cylindrical shape from a rectangular sheet, and having overlapping ends.

The introduction of the sleeve into the channel is very difficult due to the rigidity of the cylindrical sleeve.

In addition, due to its overlapping ends of the sleeve reduces the flow area of the flow, thus increasing the pressure loss of the drilling fluid in the drill string.

Another disadvantage is that in case of application of bending loads on the drill pipe, the sleeve may move away from the inner convex surface of the drill pipe and to form a crease on the concave surface, which increases the pressure loss.

Another disadvantage is that the sleeve is able to move axially and to create wear on the inner surface of drill pipe in the case of axial vibrations or loads from Yassa.

The aim of the present invention is to maintain the transmission line still in progress drilling.

Another objective of the present invention is to provide a protective and restraining device for a transmission line, which can be easily inserted into the channel component of the drill string.

Shown in figure 1 drill pipe 1 may be a pipe upset end and drill locks, priceplan the mi welded to each planted the end. One drill castle forms a coupling end 2. Another drill castle forms a nipple end 3. The nipple end 3 of the drill pipe may be screwed into the coupling end of the 2 other drill pipe, with numerous drill pipe are connected in a drill string. Drill pipe 1 provided with a longitudinal channel 4, passing through the drill lock 2, the pipe and drill lock 3. Channel 4 is used for the transportation of drilling fluids, tools, wireline logging, etc. in the drill string.

Wall thickness around channel 4 are usually sized according to weight, strength and other indicators required for operation with significant torque applied to the drill pipe 1, the high pressure in the channel 4, the bending of the drill pipe 1 and so on

Due to the effort involved to the drill pipe 1, the creating a channel in the wall of the drill pipe 1 for placement of transmission lines, such as electrical wire or electrical cable or optical fiber, may unduly weaken the wall. The proposed placement of the transmission line at least partially in the channel 4 of the drill pipe 1. The placement of transmission lines in the channel 4 can open transmission line effects of drilling fluids, cement, tools on wireline or other substances or objects passing through the channel 4. If the volume can be adjusted to match the transmission line, or may rely on the creation of a transmission line interfere with the passage of objects or substances through the channel 4. Therefore, the transmission line should be kept near the channel walls 4 to minimize interference.

Drill pipe 1 includes a Central portion 5, the first intermediate portion 6 disposed between the socket end 2 and the Central part 5, and includes planted the end of the pipe and welded to the end of the drill lock, and the second intermediate part 6, located between the nipple end 3 and the Central part 5, and includes planted another end of the tube and is welded to the end of another drill castle. The inner surface 7 of the Central part 5 forms a Central channel, which is entered on line 8 of the transmission. Line 8 of the transfer or, at least, some of its sections, for example, between the channel 9 and the retaining device may include a protective tube 8a. The inner surface 7 is part of channel 4. The outer diameter of each of the intermediate part 6 can be increased from the outer diameter of the Central portion 5 to the outer diameter of the drill locks on the ends 2, 3.

The internal diameter of the intermediate part 6 is less than the diameter of the inner surface 7 of the Central part 5. In other words, the wall thickness of the intermediate part 6 is considerably greater than the thickness of the wall of the Central part 5. Channel 9 parallel to the longitudinal channel 4 and can be made in the wall of the intermediate part 6, as well as in the wall h is pelnego end 3 to accommodate line 8 transfer without overlapping, reducing the efficiency of the intermediate parts 6. Channels 9 or drilled channels can be performed cutting machine in the first and second intermediate parts 6. Channels 9 can be performed on machine tools turning or milling.

From the coupling end 2 channel 9 may be provided with a circular groove 10, created in the ledge 11 between the intermediate section of the longitudinal channel 4 and coupling threads. Canal-side 9 opposite the groove 11, the channel 9 reported c longitudinal channel 4, being essentially at the same level as c inner surface 7.

Channel 9 near the nipple end 3 reported c longitudinal channel 4 in the intermediate part 6. Channel 9 can be performed at the same level as c inner surface 7. More precisely, the surface of the channel 9 near the outer diameter of the intermediate part 6 can be carried out at the same level as c inner surface 7.

On the side opposite the inner surface 7, channel 9 reported c round groove 12 created on the free end of the nipple end 3. In the grooves 11 and 12 can accommodate winding and connecting devices, such as disclosed in U.S. patent 6641434 or 6670880, the contents of which are incorporated into the present application by reference, for receiving electromagnetic connection between two adjacent lines is mi transfer.

Shown in figure 2 drill pipe 1 includes a holding device 13 located in the longitudinal channel 4, on the inner surface 7 of the Central part 5.

The retaining device 13 includes a longitudinal housing 14. The housing 14 is mainly longitudinal and may form an angle relative to the geometric axis of the drill pipe 1. In other words, the housing 14 may be slightly spiral, for example, the angle of the helix is less than 1 turnover helices throughout the Central part 5. The housing 14 may be implemented as one piece from one end to the other. The elongated body 14 may be made of metal, e.g. stainless steel type AISI 304L, uncoated or coated, or made of plastics or composite, for example, composite, fiber reinforced.

The elongated body 14 may be associated with the inner surface 7, for example, an adhesive connection. You can apply epoxy glue type or other synthetic material, polymerized during solidification. The elongated body 14 has an arched surface, being in contact with the inner surface 7 c of radius essentially equal to the radius of the inner surface 7. In one embodiment, the radius of curvature of the arcuate surface may be greater than the radius of curvature of the inner surface 7 for the best deduction Lin and 8 transmission during insertion of the retaining device 13 in the channel 4. The elongated body has a longitudinal groove 20, which forms a casing for line 8 of the transmission. The elongated body 14 may have a fixed length, slightly less than the minimum actual length of the Central part 5. The transmission line, for example, includes a pair of electrical wires 8b, takes place inside a small tube 8a inserted in the channels 9 in the intermediate parts 6 so that a small tube 8a can protect the electric wires 8b, at least between each channel 9 and the longitudinal body 14.

In the center of the arcuate surface can be accomplished groove 20. The groove 20 divides the arched surface on substantially symmetrical parts. The groove 20 may have a cross section larger at the first distance from the inner surface 7 than the cross-section at a second distance from the inner surface 7, and the second distance is less than the first distance, to hold the line 8 of the transmission. In other words, the elongated body 14 may include holding overhangs, configured to hold the line 8 transmission in the groove 20.

The elongated body 14 may include two lateral wings 14a, 14b, opposite the inner surface 7. The cross-section of the elongated body 14 may have a Central convex section, two transversely concave section and two convex end. The transverse size of the housing 14 is less than the internal diameter Prohm is the filling part 6, as before installation, and in the end position. The angular size of the housing 14 is less than 120°, preferably less than 60°.

The retaining device 13 also includes a set of arch elements 15. In one embodiment, the arched elements 15 attached to elongated body 14, for example, a unit with an interference fit connection, such as welding, spot welding, soldering or gluing, or by rivets or bolts. Arched elements 15 spaced from each other. Arched elements 15 can be spaced at equal intervals along the body 14.

Arched elements 15 can have a small thickness, more specifically, between 0.1 mm and 2 mm, for example, 0.4 mm of Arch elements 15 can be made of elastic material such as spring steel, precipitation hardening stainless steel such as 17,7PH stainless steel cold working, the alloy Cu-Be, a synthetic material, such as peek or composite, such as a composite, reinforced with fiber. The preferred solution may be making arched stainless steel elements 17,7PH with welded connection with extended stainless steel 304L. If an arch-shaped elements made of metal, they may have the floor, especially if the material is sensitive to corrosion, to improve other properties.

Arched elements which may have a length between 10 mm and 100 mm, measured along the axis of the drill pipe. The distance between two successive arched elements on one side of the longitudinal body may be between 500 mm and 3000 mm

Arched elements 15 can have an angle between 180° and 360° in a free state. The free state of the arched element refers to the condition prior to the installation of the holding device 13 in the drill pipe 1, or to force another element, for example, as shown in figure 5, the arched element 15. In the final position, for example, shown in figure 2, the arched elements may have an angular dimension between 210 and 300°. In the embodiment, the arched elements have an angular size of 360°.

The perimeter of the arch element 15 depends on the inner diameter of the inner surface 7 on which it is installed. Since the diameter of the arch elements 15 is determined by the diameter of the inner surface 7, in the final position by elastic deformation of the arched elements 15 exert a radial force directed away from the geometric center. Radial force perceives the inner surface 7 and an elongated body 14. Thus, the elongated body 14 is held in contact with the inner surface 7 of the elastic radial force from the arch elements 15. The choice of material with high yield strength, for example, of a material having a yield strength Bo is her 500 MPa, and angle of more than 360° for curved elements, ensures high radial forces for contact between the elongated body 14 and the inner surface 7.

Arched elements 15 may have a rectangular shape (see, for example, figure 4-5), when fully deployed or opened.

Shown in figure 2 and 3, the arched elements 15 are cut 15c in the corner of one end and a corresponding notch in the opposite corner of the other end of the arch element. Cutout 15c has a function of creating large values of angle of more than 360°, for arch element without overlapping its ends. In other words, the ends of the arch element is located at a distance from each other. The ends can be longitudinally spaced apart. This provides a large contact force between the elongated body 14 and the inner surface 7 without a large pressure loss of the drilling fluid. Each arch member 15 holds the elongated body 14 in contact with the inner surface 7 of the elastic force of the spring. Because the angle of the arched elements 15 more in end position on the inner surface 7 than in the free state, arched elements 15 apply radial force to the inner surface 7. Each arch element 15 may retain a portion of the elongated body 14. The sequence of arched elements 15, which are located essentially at equal distances is s, holds the elongated body 14 is very durable. Many of arched elements 15 is less rigid than the sleeve, and provides for easy insertion of the restraint.

Such restraint c arch elements is also more resistant to bending loads than the sleeve.

Figure 3 shows the Central section of the holding device 13 c arched elements 15 in the free state. The angular distance between the ends of the arch element 15 is between 20° and 40°. The retaining device 13 is shown in a free state. Each arch element 15 has a part 15e c cut on one side of one C-shaped wing arched element 15, the opposite end portion 15f c cut on the other side of another C-shaped wing arched element 15 and the Central portion 15b in contact c elongated body 14. Cutouts can prevent contact or eliminate the overlap between the end portions 15e and 15f, for example, during the insertion.

As shown in figure 4, the arched elements 15 have a rectangular shape when deployed. Arched elements 15 have the main plot 15a with a diameter adapted to the inner surface 7 and an end section 15b opposite convexity being in contact with the surface of the elongated body 14 and bonded with him on the side, the anti-Christ. alonei side contact with the inner surface 7. On the contrary, in the embodiment shown in figure 2, the arched elements 15 are, essentially, the Central section 15b in contact c elongated body 14, and two side plot in contact with internal surface 7.

Shown in figure 5 arched element 15 is similar to that in item 4. The restrictive element 16, for example, a rope of fusible material, such as thermoplastic, placed between the point 17 on the free end of the main part 15a and a point 18 on the end of the section 15b in contact c elongated body 14 to hold the arch member 15 in a state with a reduced diameter. Holes can be created in at least one of the points 17, 18 for ease of installation of the cord. The rope can be fixed according to the location of the adhesive connection. In a state with a reduced diameter, shown in figure 5, the curved element 15 can pass through the inner diameter of the intermediate portion 6 of the drill pipe 1 having a diameter less than the diameter of the Central part 5. The restrictive element 16 can be removed, for example, by heating to a temperature above the softening point or the melting point of the material bounding element 16 when the retaining device 13 is within the inner surface 7 of the Central part 5. Removal can occur during curing poly is erinacei glue, applied for attaching the retaining element 13 to the inner surface 7. The layer of polymerizable adhesive can therefore be applied to the surface 7 of the inner channel or on all or part facing a surface of the restraint 13. This solidification can be obtained by circulation of hot air through the channel 4. The rope 16 can be used in other variants of implementation, for example, c arched elements, shown in figure 2, 3, to limit their maximum chord or diameter prior to installation in its final position.

Figure 6, the retaining device 13 is shown during its introduction into the drill pipe 1 through the nipple end 3. Arched elements 15 can have their opposite ends mounted in contact with, for example, a restrictive element 16. The outer diameter of the arched elements 15 is reduced to facilitate their introduction into the longitudinal channel 4 and pass through the inner diameter of the intermediate part 6. The perimeter of the arch elements can be chosen non-overlapping opposite ends of the arched elements when they are inserted in the passage through the inner diameter of the intermediate part 6. Corresponding notches 15c described above and shown in figure 2 and 3, can be useful to prevent overlapping, with creation, with sufficient perimeter for arch e the cops.

As shown in Fig.7, the elongated body 14 is made of a profile or band. It has a Central groove 20, which forms a casing for line 8 of the transmission, and two side surfaces 21, 22, having a radius adapted to the inner surface 7. The radius is essentially equal to the radius of the inner surface 7 in the Central part of the drill pipe and, therefore, depends on the diameter of the drill pipe. On the opposite side of the elongated body 14 has two surfaces 23 and 24, slightly concave, and the Central convex surface 25 between the concave surfaces 23 and 24. End opposite surfaces 26 and 27 are positioned between the transverse surface 21 and a concave surface 23, and symmetric curved surface 27 is located between the arched surface 22 and the concave surface 24. The wings 14a and 14b respectively are formed by the surfaces 22, 24 and 17, and 21, 23 and 26.

As shown in Fig, elongated housing 14, also made of a profile has one arched surface 28 made with the possibility of contact with the inner surface 7, two opposite curved surfaces 26 and 27, having a small radius of curvature, two convex surfaces 23 and 24 having a large radius of curvature, and the Central groove 20 located between the convex surfaces 23 and 24 and the opposite inner poverhnosti drill pipe 1. The groove 20 can partially close arched elements 15, thus reducing the risk care line 8 pass from the groove 20.

In addition, the groove 20 has a less disclosure disclosure variant implementation, shown in Fig. More precisely, the transmission line, interactive c elongated body 14 is held between the groove 20 and the inner surface 7. The transmission line is located in the groove 20 of the elongated body 14 variant implementation, shown in Fig.9, is retained by the overhang 20a, 20b of the groove 20. The distance between the edges 20a and 20b may be less than 70% of the diameter of the groove 20.

Shown in Fig.9 the elongated body 14, the groove is absent. The elongated body 14 has a tubular design c longitudinal channel 29 in which you can set the line 8 of the transmission. Line 8 transfer can be fully protected elongated body 14 at least in the Central area of the elongated body 14. The wall thickness of the elongated body 14 may be almost constant. The elongated body 14 has a single surface 28 made with the possibility of contact with the inner surface 7 of the drill pipe 1, two rounded end surfaces 26, 27, two essentially flat surfaces 30, 31, two concave surfaces 23, 24 and the Central convex surface 25 between the concave surfaces 23 and 24. Elongated corpus may be, essentially symmetric with respect to the longitudinal plane, for example, coaxial c drill pipe 1.

Although the drawings described above, represents the component of the drill string, which is the drill pipe and having a first diameter at the Central part of the drill pipe, i.e. around the segment lengths of drill pipe with the exception of the ends, the present invention is also applicable if a plot having a first diameter corresponds to the part of the Central section of the component near the end of the component of the drill string.

1. The retaining device (13)is inserted into the Central channel of the component of the drill string with the plot of the first diameter to at least part of the Central section of the component of the drill string and the plot of the second diameter near the ends of the component of the drill string, and a second diameter less than the first diameter, characterized in that it contains an elongated body (14), forming at least part of the casing for the transmission line and having transverse dimensions less than the second diameter of the Central channel, and many arched element (15)located along the elongated body (14)that is separate from the elongated body, attached to the elongated body, the elastically curved to ensure that they move through the plot of the second diameter of the Central is the anal, and having the greatest chord is greater than the first diameter of the Central channel in the free state to allow for expansion on the site of the first diameter of the Central channel after passing through the portion of the second diameter.

2. The retaining device (13) according to claim 1, in which the arched elements (15) have an angle between 180° and 360° in a free state.

3. The retaining device (13) according to claim 1 or 2, in which each curved element provided with a cutout (15C) in the corner at one end, and a corresponding recess in the opposite corner of the other end.

4. The retaining device (13) according to claim 1 or 2, wherein the elongated body (14) has two convex surfaces, between which is placed a shroud.

5. The retaining device (13) according to claim 1 or 2, wherein the elongated body (14) comprises two side wings on opposite sides of the casing.

6. The retaining device (13) according to claim 1 or 2, wherein the elongated body (14) made of profile, and the casing is longitudinal channel.

7. The retaining device (13) according to claim 1 or 2, wherein the elongated body (14) has a tubular shape, the inner part of which forms the casing.

8. The retaining device (13) according to claim 1, which is provided with a restrictive element (16)attached to the lateral ends of the arched elements (15) to maintain the maximum chord of the arch elements is less than the second diameter of the Central channel in a restricted state before the introduction and during the introduction of the restraint component inside the drill string.

9. The retaining device (13) according to claim 8, in which the restrictive element (16) are the two which is the rope of a thermoplastic material.

10. Pipe component of the drill string containing the tubular element and the retaining device (13), inserted into it, and the tubular element has a Central channel having a section of a first diameter that is at least part of the Central section of the tubular element and the area of the second diameter near the ends of the tubular element, and a second diameter less than the first diameter, and a holding device (13)is inserted into the Central channel of the pipe element, characterized in that the retaining device (13) includes an elongated housing (14), forming at least part of the casing for the transmission line and having transverse dimensions less than the second diameter of the Central channel, and many arched element (15)located along the elongated body (14)that is separate from the elongated housing attached to the elongated body, the elastically curved to ensure that they move through the plot of the second diameter of the Central channel and having the greatest chord is greater than the first diameter of the Central channel in the free state to allow for expansion on the site of the first diameter of the Central after passing through the portion of the second diameter.

11. Tubular component of claim 10, in which an arch-shaped elements (15) hold the elongated body (14) is pressed against the area of the first diameter of the Central channel elastic is iloi spring and apply radial force to the surface area of the first diameter.

12. Tubular component of claim 10 or 11, in which the elongated body (14) has two convex surfaces (21, 22)having a curvature adapted to the first diameter.

13. Tubular component of claim 10 or 11, in which the elongated body (14) comprises two side wings on opposite sides of the casing in contact with the surface area of the first diameter.

14. Tubular component of claim 10, in which an arch-shaped elements (15) have ends spaced from each other in the final position after the introduction in the area of the first diameter of the Central channel.

15. Tubular component 14, in which an arch-shaped elements (15) are all made with the possibility of contact or at a distance from each other when introduced through the plot of the second diameter of the Central channel.

16. Tubular component of claim 10 or 11, in which an arch-shaped elements (15) have an angle of more than 360° in end position.

17. The method of installation of the restraint of claim 8 or 9, containing the following steps:
the introduction of the restraint (13) in the Central channel of the tubular component of the drill string, having a first diameter as the inner diameter, and
the flow of hot air into the Central channel of the pipe component of the drill string to break limiting element (16) and allow for expansion of the arched elements (15) for pressing to Uch is stku the first diameter of the Central channel.



 

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2 cl, 1 dwg

FIELD: measurement equipment.

SUBSTANCE: formation method of measurement data packages of a cable-free telemetric system during the well drilling involves coding of every four bits of information with a noise-like signal (NLS) with the length of 16 bits and information transfer by means of a phase-shift signal, packages of various types. The data measured in dynamics in the turbine drilling mode is transferred in S-O1-Z-O2-A-O3-"Г"-O4 packages consisting of synchronisation sending (S), diverter (O1), zenith (Z), diverter (O2), azimuth (A), diverter (O3), gamma background level ("Г"), diverter (O4). The data measured in dynamics in the rotary drilling mode is transferred in S-1-"Г"1-R1-"Г"2-R2-"Г"3 packages consisting of synchronisation sending (S), special NLS equal to one and serving for identification of the package type, gamma background level ("Г"1), formation resistance (R1), gamma background level ("Г"2), formation resistance (R2), and gamma background level ("Г"3). The data measured in statics is transferred with S-9-"Г"1-Z-R-A-"Г"2 packages consisting of synchronisation sending (S), special NLS equal to 9 and serving for identification of the packages type, gamma background level ("Г"1), zenith (Z), formation resistance (R), azimuth (A), and gamma background level ("Г"2).

EFFECT: increasing informativity of transferred parameters owing to increasing transfer frequency of logging parameters of gamma background and formation resistance.

4 cl

FIELD: oil and gas industry.

SUBSTANCE: method for determining the saturation of reservoir beds involves determination of porosity coefficient of the investigated formation using two-probe neutron-neutron logging as per thermal neutrons. Calculation of porosity function as the ratio of intensities of flows of thermal neutrons. Recording of GIRZ spectrum intensities. Measurements are carried out during cement setting period of time after 2-4 days from the beginning of cementing of the well shaft, or 2-4 hours after the drilling tool has been raised out of the well. There are cross-plots as per dependences. On cross-plots there performed is approximation of lower points of quadratic function, which correspond to water-bearing formations with drill mud filtrate, and the function reflecting "deficiency of density and hydrogen content" in the nearest zone is calculated as per the given formula.

EFFECT: enlarging the range of application; improving its accuracy and informativity.

4 dwg, 2 cl

FIELD: oil and gas industry.

SUBSTANCE: method involves lowering of packers and equipment for extraction (pumping) of product in interval of product extraction on tubing string located against each productive formation. Down-hole measurements are performed by sensors. Obtained date is transmitted to ground receiving-processing unit by means of electronic self-powered measurement modules transmitting data signals by tubing string by electromagnetic pulses to common electronic self-powered transmitting module. Module is installed in tubing string assembly above the highest productive formation. Data high-frequency signals are amplified and transmitted to ground receiving-processing unit through rock. Equipment for extraction (pumping) of product is controlled by communication channel or by hydraulic communication channel using independent electronic modules. Modules contain housing in which the following is installed: valve for control of supply (removal) of fluid medium controlled by step-type tiny engine with driving mechanism of valve gate rotation, autonomous power supply unit, receiver of fluid pulses and dipole receiver of electromagnetic oscillations, amplifier modules of decoding device and power amplifier.

EFFECT: improving efficiency of monitoring of simultaneous separate operation of wells by means of provision of reliability of data transmission by two-way wireless communication between well equipment and ground receiving-processing unit.

8 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: method of hydrodynamic investigations involves lowering of equipment for investigation of formation with self-contained measuring device by assembly pipes. Interval of investigation is sealed by packer. Arrangement of fluid influx sequence is provided by feed valve, investigated parameters are recorded by self-contained measuring device at the same time. Packers are released, equipment is lifted to wellhead by assembly pipes with further decoding of self-contained measuring device records. Tubing string is preliminary equipped with a seat, in which detachable receive/transmit module is lowered by geophysical cable. Parameters measured by self-contained measuring device are recorded by electromagnetic communication channel in predetermined time mode. Equipment corresponding to the method is also proposed.

EFFECT: improving efficiency of works on formation investigation by formation tester on pipes, improving informativity and speed of decoding or recorded parameters.

2 cl, 1 dwg

FIELD: electricity.

SUBSTANCE: downhole system comprises a three-phase power cable, a source of supply, an electric submersible pump and a gauge. The cable stretches from the surface into a well and may provide supply to the three-phase motor with certain voltage and frequency. The source of supply is connected to the three-phase power cable and may produce AC for supplying to gauges, sending it along all three conductors of the three-phase power cable. The pump is connected to the three-phase power cable and comprises a three-phase motor receiving supply along the specified three-phase power cable. The gauge is connected to the three-phase power cable using a capacitance link with the possibility to receive AC of gauge supply. At the same time the value of the current voltage is lower than the value of the three-phase motor supply voltage, and frequency is higher than frequency of the three-phase motor supply voltage.

EFFECT: improved system of downhole gauge supply.

18 cl, 3 dwg

Flexible coupling // 2488682

FIELD: oil and gas industry.

SUBSTANCE: coupling includes two housings connected to each other by means of a spherical ring, in which drive and driven shafts are installed. Shafts are connected to each other by means of a cam-and-disc hinge joint of equal angular speeds. Radial holes are made on ends of shafts. Axes of holes are perpendicular to axes of the corresponding shafts and offset relative to end faces of the shafts towards centre of mass of the corresponding shaft so that a rectangular profile is formed on end faces of the shafts. In radial holes there installed are cylindrical cams, the end faces of which are restricted against longitudinal movement with the plates fixed on the shafts. In cams there are longitudinal circular slots of rectangular profile for arrangement of a transversely installed disc. The disc transmits rotation from drive shaft to the driven shaft. The disc axis is located perpendicular to the axis of each of radial holes, the width of the rectangular profile of which is less than diameter of radial holes, but more than thickness of disc 14. Centre of mass of the disc coincides with centre of mass of a spherical ring.

EFFECT: higher reliability, repairability and operating life of the coupling.

1 cl, 5 dwg

Tubing string // 2487229

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to tubing string having silicate enamel coating at inner surface. At outer surface of the string ends there is a tool for tubes connection made as threaded sections. At that according to the invention silicate enamel coating at inner surface of tubes is modelled at substrate. Substrate is formed with area having removed layer of metal surface with depth from 60 mcm up to 80 mcm. At that substrate length exceeds length of threaded section at outer surface of the tube 2.1-2.3 times.

EFFECT: increase of the string service life.

1 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: section contains inner tube with reinforcement at the ends, centring skids, insulation and gas absorbers. Also the section contains outer tube with male screw at ends and tubing collar. Outer tube is designed with air-tight valve ensuring creation of vacuum 10-4-10-3 mm hg in annular space. In annular space there are steel linings in the form of bushings. Lining are welded to inner and outer tubes by vacuum-tight welds. To outer tube linings are welded at the point of male screw placements at ends within area under the section from the first turn till base plane of thread. In annular space linings are located so that grove in the lining and outer tube form a cavity. Centring skids are made as clamps consisting of two parts interconnected rigidly. Inner surface of centring skids is designed with friction properties.

EFFECT: reduction of heat losses during heat carrier passage through the string and increase of operational efficiency for the string.

1 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: system includes flexible tubing having a fibre optic conductor and a section with instruments. At that, fibre optic conductor is located in a cavity flush with outer surface of the section of flexible tubing equipped with instruments. Besides, the above cavity is curved. The system also includes a device for fixing the fibre optic conductor on the surface of the wall of flexible tubing, an adapter through which the above conductor passes to an internal fibre optic conductor, and a connecting coupling. The latter has the possibility of data transferring by means of contactless telemetry.

EFFECT: improving measurement efficiency of one or more parameters in the well along a certain zone of the well.

21 cl, 9 dwg

Disconnector // 2482257

FIELD: oil and gas industry.

SUBSTANCE: disconnector includes a hollow housing with a bore, a reducer with holes, a load with an annular bore and a restrictor on lower end in an axial channel, fasteners in the form of balls, which are installed in the reducer's holes with possibility of interaction with the load and the hollow housing. The reducer includes a crossover, in which a nut is installed, a spring-loaded annular piston with a seat under the ball valve and a collet grip with petals passed through the nut to the axial channel of the reducer. The load is equipped with an annular bore with a cylindrical projection on upper end and a through axial channel; at that, on outer surface of the load there made are annular grooves and installed are seals, above and below fastener location place, and the reducer is installed in the axial channel of the hollow housing with possibility of axial movement and is equipped with a stop nut and a seal.

EFFECT: possibility of emergency-free lowering of downhole equipment, possibility of pressure supply of working fluid to the device, with transfer to the well cavity, possibility of controlled detachment of the disconnector from the downhole equipment.

3 dwg

FIELD: mining.

SUBSTANCE: modular tool to be used in underground formations is proposed. The tool includes the first module, the second module and one or more connection devices for connection of the first and the second modules. Particularly, the first module includes the first heavy-weight drill pipe that at least partially forms an external part of the tool. It includes the first engagement mechanism on its first end of the pipe and the second engagement mechanism on its second end. The first module also includes a through channel for passage of drilling mud. The second module has a similar configuration. Connection of at least one line of hydraulic system is performed by means of one or more connection devices. Line of hydraulic system hydraulically connected to external part of the tool and electric channel for transfer of electric power and/or data between modules.

EFFECT: improving operating reliability of the module.

13 cl, 24 dwg

Casing centraliser // 2475618

FIELD: oil and gas industry.

SUBSTANCE: invention contains housing installed on casing pipe with possibility of rotation and longitudinal movement between two limit stops. Limit stops are rigidly fixed on casing pipe and designed as rings with threaded openings. Retaining screws interacting with casing are installed in threaded openings. Limit stops rings are separated from housing which includes upper and lower belts. Belts are designed as cylinder rings connected to centring ribs curved by arc in planes forming outside part by bulge. Outside surface of centring ribs in centreplane is designed arc-shaped with radius equal to outside radius of housing belts.

EFFECT: improving operating reliability.

1 cl, 2 dwg

FIELD: mining.

SUBSTANCE: access to adjusting screws of the device assembly is provided; rotary drive of tool head about the well axis is performed with two hydraulic motors. Hydraulic motors are located diametrically opposite to each other. They ensure the alignment of cutting forces at turning of conical surface of casing pipe head and cutting of thread on it.

EFFECT: excluding the process of element-by-element assembly of the device at the well head and reducing labour intensity and the time required for installation of the device on the pipe; avoiding the jamming of cutting head; reducing the time required for thread cutting process.

1 cl, 8 dwg

FIELD: mining.

SUBSTANCE: in a casing string centraliser with varied geometry, comprising a vessel and centralising elements from elastic material rigidly fixed on the vessel, having an inner cavity, arranged along a spiral on the vessel surface. The inner cavity of the centralising elements is filled with a water-swellable polymer, and external side faces of the elastic centralising element are arranged as semi-permeable.

EFFECT: development of a centraliser with varied geometry for a casing string, having minimum diametre for lowering of a string into a well and maximum after its lowering and when cementing an inclined or a horizontal shaft.

11 dwg

FIELD: oil and gas industry.

SUBSTANCE: container in shell from composite material for construction of multi-hole wells includes the section of casing string with preliminary cut window in it for direction of drilling tools and casing string covered from the outside by the layer of easy-drilled material and annular grooves interacting with layer ends made at its external surface below and above the window. From the outside the layer ends are pressed via rings to the casing string section, note that there are sealing elements mounted between the window and annular grooves. Also the layer ends from the outside can have thread and rings are made with the possibility of tight interaction with casing string section and equipped with the thread from inside for layer external thread.

EFFECT: structure allows reducing procurement costs for its production and use as well as provision of tightness between casing string section and layer of easy-drilled material.

2 cl, 4 dwg

FIELD: oil extractive industry.

SUBSTANCE: device has inner and outer pipes, placed coaxially with forming of ring-shaped space between them. Ring-shaped space is pressurized by vacuum seams, thermo-isolation is placed therein and vacuum is formed, on both sides of outer pipe thread is made, on one end thereof sleeve is screwed with isolating bushing. Vacuum seams are made at even spaces from ends of outer pipe, calculated from formula L=K·β, where L - distance between vacuum seam and end of outer pipe, mm; K - number of predicted maintenances of threads of thermo-isolated pipe; β - value of shortening of thermo-isolated pipe after single thread maintenance, mm. Also described is another variant of thermo-isolated pipe, wherein vacuum seams are made at different spaces from ends of outer pipe. Distance on side of sleeve is calculated from formula: LM=KM·β, where LM - distance between vacuum seam and end of sleeve end of outer pipe, mm, KM - number of predicted maintenances of thread of sleeve end of thermo-isolated pipe; β - value of shortening of thermo-isolated pipe after single thread maintenance, mm; and on nipple side space is calculated from formula: LH=KH·β, where LH - distance between vacuum seam and end of nipple end of outer pipe, mm; KH - amount of predicted maintenances of thread of nipple end of thermo-isolated pipe, while KM<KH.

EFFECT: higher efficiency.

2 cl, 1 dwg

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