Drill column. RU patent 2507395.

FIELD: mining.

SUBSTANCE: drill column contains two elements connected to each other detachably and rigidly with respect to rotation. Each element of drill column contains inner and outer pipe. Between them there formed is annular receiving cavity. Each element of drill column has a wire for power or data transmission. The wire passes along longitudinal axis of drill column. Each wire for power or data transmission is connected to induction coil. For power or data transmission along drill column induction coils are designed with possibility of inductive coupling with each other. The first element of drill column is provided with inner induction coil on outer circumference of its inner pipe. The second element of drill column is provided with outer induction coil on inner circumference of its outer pipe. Induction coils are made segmented consisting of several annular segments and at least partially are overlapped in radial direction. At least two segments are detachably connected to each other.

EFFECT: providing compact and easy performed connection for power or data transmission wires during upgrade, simplifying operations performed with induction coils.

The technical field to which the invention relates

The invention relates to the drill string containing, at least, two elements are columns, that are connected to each other and rigidly in the circumferential direction, in accordance with the restrictive part of paragraph 1 of the claims.

Each element of the drill string contains an inner tube and the outer tube, between which formed a ring reception cavity. Further, each element of the drill string has a wire transfer of energy and/or data, which runs along the longitudinal axis of the drill string. Wires of power transmission and/or data elements of drill stem connected with each induction coil, and for power transfer and/or data along the drill string induction coils are adapted to the inductive connected to each other.

The level of technology

Drill string can be, in particular, the drillstring earth drill for drilling of boreholes in the ground. Such wells are drilled to improve the bases under construction or for the construction of bored piles or insulating the walls in the ground.

Because boreholes often have considerable depth or length, the drill string usually perform a composite of many individual items. Individual elements of drill stem provided at the ends connecting devices for mechanical connection with the next item. For example, at the end of the first element of the drill stem, a plug-in, i.e. covered by connecting the region, and the second, the opposite end of a covering connecting region. This makes it possible to combine into one of drill string or drill rod many essentially identical elements of drill stem. It is important, that should be connected not only to the exterior of the pipe, but also internal pipe.

During the sinking of boreholes often it is advisable to transfer to the operator of the drilling rig data on the situation inside the well, particularly on the situation of drilling tip. Such data may include, for example, pressure or temperature, angle or salt content in the well. In addition, under certain drilling methods may be desirable to transfer, on a tip drill or drill bit data such as operating parameters. For these purposes it is known to the decision which in the drill string provided wire transfer of energy and/or data that along the drill string can be transmitted information.

An example of a screw auger with two strands, each of which contains the outer tube and the inner tube is described in the patent document DE 29914494 U1. In every link between the carrier pipe and outer pipe conducted cable. Cables are connected to each other electrical connectors.

Further, to connect the wires inside the drill rod know the use of the two axial ends of the elements of drill stem induction coils through which wire inductively connected to each other.

Example loopset, though not for the double pipe, described in the patent document US 2002/0193004 A1. Induction coils are located directly at the connecting areas elements of drill stem.

Disclosure of the invention

The objective of the invention is to create in the drill string consisting of the elements of internal and outer pipe, compact and easily performed in order to resupply the connection wires of power transmission and/or data.

According to the invention the solution of the problem is achieved in the drill string on paragraph 1 of the claims. Preferred examples of implementation are outlined in dependent claims and presented in the description and the drawings.

Drill column the invention differs in that the first element of the drill string is equipped with an internal induction coil outside the district periphery of his inner tube, and the second element of the drill string is equipped with external induction coil inside the district periphery of his outer pipe and induction coils are designed segment of several ring segments and at least partially overlap in the radial direction.

In principle, the drill string can be used for any methods of drilling and in any drilling installations. For example, the inner pipe drill string, which can be named also double the drillstring, can be used as a so-called flushing pipes. Drilling wells in the ground is often performed by means of leaching method of drill string in soil is rinsing the fluid that comes out of the drill string in the well bottom and then transports upstairs developed by drilling a small thing. The inner tube is used to enter the wash fluid into the well.

Another function of the inner tube may also consist in the introduction of solidifying suspension. For the device of piles after the sinking of wells by the pulling of her drillstring through the inner tube in the hole can be made concrete. Thus, the inner pipe can be also named pipe concreting.

The first major invention idea is to interact induction coils were not located on the same pipe, i.e. not on each inner tube or on the outer pipe. Instead, it is proposed to arrange the first induction coil on the inner tube and the second induction coil - on the outer pipe element of the drill string. Thus, according to the invention of the induction coil are located between the internal drillstring and outside the drillstring. Due to this, remain free end of the party or the connecting field of elements of drill stem, so that they can be used then ordinary coupling systems. The location of induction coils in accordance with the invention provides the ability to easily retrofit existing drill columns while maintaining the ability to use existing connection systems, especially on the outer pipes.

Another main idea of the invention consists in that to position interacting induction coils so that after connection of elements of the drill string with each other induction coils overlap in the radial direction, that is, were located at least partially radial relative to each other. Radial relative location of induction coils will also lead to better opportunities outfitting, as axial face sides of the elements of drill stem remain free.

According to the invention for easier installation of induction coils are constructed of multiple segments. Under this sign mean that induction coils are made, not as common parts and assembled from several parts. Separate parts or segments form a ring segments of annular coils.

In accordance with the invention, created an opportunity to arrange induction coils on the transition between the two elements of drill stem, but outside of connecting areas or areas of the accession of these elements. The induction coil does not cause interference to connecting areas. Under the connective area here we have in mind particularly the section of the inner and/or outer tube serves for fixed connection of the respective pipes in the circumferential and axial directions. The connecting area may contain, for example, thread, one or more slots, fixing or plugs or other connection systems. According to the invention of the induction coil preferably located on the axial and/or radial distance from connecting areas or the connecting surfaces of elements of drill stem.

To obtain a particularly compact layout preferably at least one of induction coils located in the ring reception recess. In respect of the admission recess, it concerns especially the outdoor reception extraction at the outer circumferential surface of the inner pipe or on the inside of the admissions extraction at the district internal surface of the outer tube. Accordingly, particularly preferably internal induction coil is located in the outer recess in the inner tube of the first element of the drill string and/or external magnetic coil is located in the inner recess of the outer tube second element of the drill string. Due to the prefabricated perform induction coils of several ring segments can be particularly easily installed into the cutouts.

Operations with induction coils, especially their bookmark appropriate housings can be simplified by the fact that at least two ring-segment connected to each other. Under the plug connection to form a connection that can be disconnected with the help of tools or manually and re-established in a reverse process. When United plug connection of the elements and their separation is not exposed to any significant damage. Plug connection may be, for example, screw, plug or fixing connection.

In the future, preferred sample process in respect of induction coils, at least two ring-segment connected to each other with the possibility of the relative movement. Due to this can be modified form of the induction coil, which further simplifies the installation of coil in the hollow. Especially preferably two ring segment connected to each other with the possibility of relative rotation. By rotating joint, the axis of which could take place in parallel to the longitudinal axis of the induction coil, achieved further simplify the installation of the coil in the corresponding element of the drill string. Can be provided with means of fixation of the rotary connection to securely hold installed coil.

In the following preferred the example of the execution of the invention provides that the inner tube of the first element of the drill string contains a plug-in or covering the screws area for connection to another internal pipe and internal induction coil is located at a distance along the axis of the inserted or covered by connecting the field. While in the connecting field is not created interference from the induction coil for joining the inner tube of a neighboring element of the drill string. In particular, the inner pipe may be receiving recess, which is at a distance along the axis of the connecting field and in which there is an induction coil.

In particularly preferred sample process provided that the outer induction coil is inserted inside of a connecting part of the outer pipe second element of the drill string. Thus, when assembled elements of drill stem outer induction coil preferably positioned so that is radially inserted inside of a connecting part of the outer pipe second element.

In the process of drilling usually high torques are passed through the outer pipe and tubular connections between two adjacent outer pipes. Due to the location of the induction coil outside the radial inside the fitting outer tube this connective part fully provides mechanical stability. It is especially due to the fact that the connecting area of the inserted connecting part is usually located on the outer circumferential surface of the output drive parts and thus can be completely free from the induction coil. In addition, the location of the coil inside the connecting part can be used without modification available inserted part of the accession of the subsequent equipment of induction coils. Therefore, the drill string can be easily equipped by the fact that in the plug connecting part of its outer tube inner surface district set the telecoil.

Easy retrofitting and replacement capability in case of a defect can be achieved due to the fact that at least one of the elements of the drill string contains an adapter or a mounting sleeve with inner induction coil and/or external induction coil. The mounting sleeve, at least partially, forms a section of the inner tube of the first element of the drill string and/or a section of the outer tube second element of the drill string.

Preferably mounting sleeve is separate from the element of the drill string detail, which is rigidly connected with it, preferably to the hard-coded in the axial and circumferential directions. Thus, preferably installed mounting sleeve is stationary relative to the element of the drill string. In particular, it may be provided that the mounting sleeve is welded or is screwed to the basic tubular chassis inner and/or outer pipe or connected with him pressing. To create the possibility of replacement of the mounting sleeve preferably she installed in the element of the drill string. Especially preferably, when the mounting sleeve can be inserted into an element of the drill string in the longitudinal direction.

Preferably the first element of the drill string contains first a mounting sleeve, and the second element contains the second mounting sleeve. In the preferred sample process mounting bushings can mechanically connected to each other.

Especially regarding outdoor induction coil preferably mounting sleeve is made to enter in the main tubular casing or screws in the outer pipe. The mounting sleeve for outdoor induction coil can in principle be entered without a special modification of the outer tube, transmitting torques and axial forces.

Especially in relation to the internal induction coil may be appropriate to have a mounting sleeve on the outer district periphery of the inner tube. Usually through the inner tube is passed lower effort than through the outer pipe, but particularly compact layout may also be preferable to have a mounting sleeve for internal inductance coil on the axial continuation of the main tubular housing.

Preferably mounting sleeve contains the reception area for internal induction coil and/or external induction coil. To do this, on the mounting sleeve can be provided, for example, internal excavation and/or outdoor recess.

The following preferred a sample run is that mounting Bush inserted in the screws part of the outer pipe. This creates a simple expandable with additional element of the drill stem, and the connecting part of the outer pipe through which may be transmitted to the high efforts, can remain without significant changes. According to the invention, especially preferably positioned and/or strengthen a mounting sleeve inside the plug of the connecting part of the outer tube. In such a simple way outer induction coil can be installed on the outer pipe.

For directions wires of power transmission and/or data preferably mounting sleeve is equipped with a cable. Cable channel can be a through hole through which the cable can be carried out from the inner and/or outer induction coils in a ring cavity between the carrier pipe and outer pipe. Preferably cable channel runs in the longitudinal direction element of the drill string or drill string.

Ease of maintenance of the drill string can be achieved due to the fact that the external pipe first and/or second element of the drill string is equipped with an opening cover for access to a wire transfer of energy and/or data.

A brief list of drawings

Next invention will be described on the preferred examples with reference to the accompanying schematic drawings. The drawings:

figure 1 depicts a longitudinal section of the element of the drill string and separate mounting sleeve and induction coils,

figure 2 depicts a cross-sectional element of drilling column of figure 1 with inserted mounting sleeves and induction coils

figure 3 depicts the term upper portion of the element of drilling column of figure 1,

figure 4 depicts the term, the lower portion of the element of drilling column of figure 1,

figure 5 depicts the side internal telecoil,

figure 6 depicts the side first mounting sleeve,

Fig.7 depicts a mounting sleeve in the cross-section line-6,

Fig.8 portrays on the side mounting sleeve on 6 with the established internal induction coil,

figure 9 depicts the term mounting sleeve on 6 and separately internal telecoil,

figure 10 depicts the term mounting sleeve on 6 with the established internal induction coil,

figure 11 depicts the term internal telecoil,

fig.12 depicts the inner telecoil on 11 on the form of the cross section along the a-A in figure 14,

fig.13 depicts the inner telecoil on 11 on the form in the context of vertical

figure 14 depicts the inner telecoil on 11 in the front view,

fig.15 portrays in the context of the second mounting sleeve and separately outer telecoil,

fig.16 portrays in the context of the second a mounting sleeve on fig.15 installed in her outer induction coil,

fig.17 a second term mounting sleeve on fig.15 with established internal induction coil,

fig.18 depicts the term outer telecoil,

fig.19 depicts the outer telecoil on fig.18 in the cross-section line And the fig.21,

fig.20 depicts the outer telecoil on fig.18 in the context of vertical

fig.21 depicts the outer telecoil on fig.18 in the front view,

fig.22 depicts the term internal telecoil,

fig.23 depicts the term outer telecoil.

Realization of the invention

All the drawings of the same or corresponding components use identical positions.

Figures 1 and 2 shows the example of the execution of item 10 of drilling column 1 of the invention, which on the first axial end of 12 has the first screws region and on the second axial end of the 13th second screws region. Both of connecting areas can be attached another element of the drill string. Thus, by joining several elements of the drill string that can be performed essentially the same, you can form a drill string in principle any length. The longitudinal axis of the drill string is designated 14.

Figure 3 shows a plot in perspective the top of the axial end of item 10 of the drill string. Figure 4 shows in perspective area of the lower axial end of item 10 of the drill string.

Further, with links to Fig.1-4 will describe an example of executing item 10 of the drill string, which can be a component of drilling column of the invention.

Item 10 of the drill string contains an inner tube of 20 and located centrally in her outer tube 40. The inner pipe 20 and outer tube 40 are connected to each other tightly in the circumferential direction, that is, essentially, no relative rotation between the carrier pipe 20 and outer pipe 40.

The inner pipe 20 contains the main tubular casing 22, which runs along much of the length of item 10 of the drill string. The main tubular casing 22 is made tubular essentially constant wall thickness. On the lower figures 1 and 2 the end of the main tubular casing 22 provided the first interim item 24, which forms part of the inner pipe 20. As seen in figure 1 and 2, the first intermediate element is also part of the outer pipe 40. In the first intermediate element 24 provides axial channel 28 for cable entry 17.

Second, the upper end of the internal tube 20 has a second interim item 26. The second intermediate element 26 is located inside the outer tube 40 and rigidly connected with it. Preferably intermediate element 26 pressed into inner tube 40 and/or welded on to it.

The first intermediate element 24 and the second intermediate element 26 are for attaching the mounting bushings, 60, 80. Accordingly, the interim items 24, 26 may be named as connecting elements.

The external pipe 40 contains the main tubular casing 41, which runs along much of the length of the outer pipe 40. On both axial ends of the outer pipe 40 provides for the connecting part 42 to connect with the neighboring outer pipe. Lower figures 1 and 2 end of the outer tube contains 40 reception clutch 44, which can be named also covering the fitting. In the example shown execution reception coupler 44 contains the first part of 45 clutch and the second part 46 couplings, which are rigidly connected to each other, in particular welded together. In the reception of the coupling 44 provides axial slots 47 and axial grooves 48 for the establishment of strict in the circumferential direction connection with a neighboring outer pipe. Next, reception coupler 44 contains circumferential notch 49 for the establishment of strict axial connections with neighbouring outer pipe. Circumferential notch 49 is inside the recess of the admissions coupling 44. In the area of the district a recess 49 has a hole 50 access, which can be entered safety element, in particular link chain 57 for the axial safety connection with a neighboring outer pipe.

At its top figures 1 and 2 the end of the outer tube 40 has a plug-in part 52, which can be named also covered by part. Plug-in part contains 52 axial slots 53 and axial grooves 54, which correspond to the axial swallow-tail slots 47 and axial grooves 48 reception clutch 44. Next, plug-in part 52 has a corresponding district excavation 49 circumferential notch 55, which is outside the notch on the male part 52. For axial insurance male part 52 of the admissions clutch 44 in the district a recess 49, 55 lay chain 57.

Inside the admissions clutch 44 provided the first mounting Bush 60 for her first induction coil, which can be named also internal induction coil 100. The first mounting Bush 60 contains tubular plot 61, which forms part of the inner pipe 20. Next, the first mounting Bush 60 contains a spacer ring 62 for a bearing on the outer tube 40. In the axial end region tubular plot 61 provides for connecting area of 64 for accession to the inner pipe of the neighbouring element of the drill string. In this example, the execution of the connecting area of 64 executed in the form of covering the connecting field.

To install the first induction coil 100 on the first of the mounting sleeve 60, in particular its tubular section 61, formed radial reception notch 66. Reception notch 66 is located on the outer circumferential surface of the tubular plot 61 and can be called outside a notch.

Next to the reception notch 66 formed capture a notch or hole 67 for easier removal of the internal induction coil 100, as shown also in figure 4, 9 and 10.

Between spacers ring 62 and tube plot 61 executed cable channel 76 cable wiring.

At its opposite connecting the field of 64 the end of the first mounting Bush 60 has the junction area of 68 to establish a connection with the tubular casing 22 internal pipe 20, i.e. from the first intermediate element 24 or in General with a connecting element of internal pipe 20.

At its top figures 1 and 2 axial end of the 13th item 10 of the drill string has a second mounting sleeve 80, which is designed for installation in her second induction coil 110. The second mounting Bush has 80 tubular plot 81, which forms part of the inner pipe 20. Tubular plot has 81 screws area of 84, which can be named also inserted or covered by connecting area. Connecting area of 84 performed concerned or the return of the connecting field of 64 of the first of the mounting sleeve 60. On the opposite of the connecting field of 84 end provided the connecting area of 88 for the compounds of the second of the mounting sleeve with 80 main tubular casing 22 internal pipe 20 or with the second intermediate element 26 or in General with a connecting element of internal pipe 20.

The second mounting Bush 80 contains a body 82 sleeve, which is intended to support the inner circumferential surface part of the outer pipe 40, in particular its screws part 42 and/or its main tubular casing 41. Housing 82 sleeve is equipped with on its inner surface district radial reception notch 86 for the installation of outdoor induction coil 110. Reception notch 86, which can be called the inner recess, passes through the ring in the circumferential direction along the inner circumferential surface of the hull 82 sleeve. Between tubular plot 81 and housing 82 sleeve provides 96 channel cable for the cable.

Cover 18 for cable cavity preferably located on the axial end of the main tubular chassis 41 outer pipe 40, in particular the first and/or second intermediate element 24, 26.

As already indicated, drill column the invention can be collected by the connection in a number of multiple items 10, 11 of the drill string. Thus, in the drill string according to the invention, may provide the first item 10 of the drill string with design features are described with regard to the implementation of the bottom of the axial end element, shown in figure 1 and 2. Further, there may be a second item 11 of the drill string with design features are described in relation to the implementation of the top-axial end element, shown in figure 1 and 2. Accordingly, we can understand the figures 1 and 2, so that shown in the lower pane displays the first item 10 of the drill string and the top of the region is the second item 11 of the drill string. Items 10, 11 of the drill string can connect to each other. Shown in figure 5-23 can choose to refer to the first item 10 of the drill stem, or to the second element of 11 of the drill string.

Figure 5-10 shows further details about interior design of the induction coil and the first 100 mounting sleeve 60 or their parts. The first mounting Bush 60 is designed in particular for the installation of an internal induction coil 100. As it is especially visible on Fig.7, induction coil 100 has several, in this case three ring segment 102. Between the two ring segments 102 induction coil 100 has an area of 109 disclosure or gap, which the coil can be converted to install the specified reception excavation 66. This divided on the part of the induction coil 100 can in a simple way, be inserted in the radial receiving notch 66.

For positional fixing the induction coil 100 at reception excavation 66 provides the locking device 70 for example, here are in the form of drillings in the outer surface of the hollow. Induction coil 100 is equipped with the appropriate locking devices 108, here are in the form of pins on the inner surface of the coil.

On 11-14 shows some constructive details of the internal induction coil 100 according to the example implementation. Individual segmented 102 connected to each other connectors 104. Connectors 104 can also form part of the body coil or winding coil housings. Between every two ring segments 102 provided overlap 105, that closes the electric connector 104.

Other constructive details of the internal induction coil 100 are shown in the sample process for fig.22. At least some of the ring segments 102 pivotally connected to each other by means of hinges 106. The axis of rotation hinges 106 pass along the longitudinal axis of the induction coil 100. For connection of a body coil with a wire transfer of energy and/or data on one of the ring segments 102 stipulates the installation of the electrical connection or connection wire 107. Preferably he is in the area of 109 disclosure of inside the induction coil 100 or near this area. Preferably mounting wire 107 is located on the front side of the induction coil 100.

On fig.15-17 shows the second mounting Bush 80 and outer induction coil 110. The second mounting Bush 80 is designed for installation outside the induction coil 110. Outer induction coil 110 performed essentially the same design as an induction coil 100, and has comparatively larger in diameter so that the outer induction coil 110 may be located around the inside of the induction coil 100.

On fig.18-21 outer induction coil 110 shows other examples of implementation. Outer induction coil 110 essentially corresponds to the internal induction coil 100 and also consists of several ring segments 112, which are connected with each other by electrical connectors 114. Between the two ring segments 112 formed area of 119 disclosure or crack through which the coil can be or compressed for installation provided for the selection excavation 86. This divided on the part of the induction coil 110 may be the easiest way is inserted in the radial receiving notch 86.

Other design features external induction coils are shown on fig.23. Like internal induction coil 100 some of ring segments 112 pivotally connected to each other by means of hinges 116, and the axis of rotation hinges 166 pass along the longitudinal axis of the induction coil 110. Between every two ring segments 112 provided overlap 115, that closes the electric connector 114. For connection of a body coil with a wire transfer of energy and/or data is provided by the device electrical connection or connection wire 117, which is preferably in the field of 119 disclosure or near it. Preferably mounting wire 117 is located on the front side of the induction coil 110.

For positional commit or commit from the rotation of the induction coil 110 at reception excavation 86 provided holding devices 90, for example, here are in the form of drillings in the outer surface of the hollow. Induction coil 110 equipped with appropriate locking devices 118, here are in the form of pins on the outer surface of the coil. Fixing devices 118 induction coil 110 can be brought into engagement with locking devices 90 second mounting Bush 80.

Both the internal and external induction coils contain coil body, at least with one winding. In principle winding or, under certain conditions, several windings can be located in any way. So for example, induction coils 100, 110 may have one or more of the windings in the circumferential direction. However, induction coils 100, 110 can be performed in the form of so-called toroidal coils, in which one or more of the windings are wound around the ring, that can be called an annular core.

1. Drill string, containing, at least, two elements (10, 11) drill string, which are connected with each other and harshly against rotation, with each element (10, 11) drill string contains an inner tube (20) and outer tube (40) accordingly, between which formed a ring reception cavity (16), each element (10, 11) drill string has a wire (17) power transmission and/or data, which goes along the longitudinal axis (14) of the drill string (1)and the wires (17) power transmission and/or data elements (10, 11) drillstring are connected with each induction coil (100, 110) respectively, and for power transfer and/or data along the drill string (1) induction coils (100, 110) implemented with the possibility of inductive coupling with each other, is characterized by the fact that the first item (10) of the drill the column has an internal induction coil (100) on the outer district periphery of his inner tube (20), and the second element (11) of the drill string is equipped with external induction coil (110) on the inner district periphery of his outer tube (40), the induction coil (100, 110) performed segment of several ring segments (102, 112) and at least partially overlap in the radial direction, and at least two ring segment (102, 112) connected to each other.

2. The drillstring according to claim 1, wherein at least one of induction coils (100, 110) is located in the ring reception seizure (66, 86).

3. The drillstring according to claim 1, wherein at least two ring segment (102, 112) are connected to each other with the possibility of relative rotation.

4. The drillstring on any one of claims 1 to 3, wherein the inner tube (20) of the first item (10) of the drill string contains a plug-in or covering the screws region (64, 84) for connection to another internal pipe and internal induction coil (100) is located at a distance along the axis of the inserted or covering of the connecting field of 64, 84).

5. The drillstring on any one of claims 1 to 3, wherein the outer induction coil (110) is inserted inside of a connecting part (42, 52) outer tube (40) the second element (11) of the drill string.

6. The drillstring according to claim 1, wherein at least one of these items 10, 11) drill string contains a mounting sleeve (60, 80), which is internal induction coil (100) and/or external magnetic coil (110).

7. The drillstring of claim 6, wherein the mounting sleeve (60, 80) has a tubular plot (61, 81), which is located on the axial continuation of the main tubular casing (22) inner tube (20) of the first item (10) of the drill string.

8. Drill column 6 or 7, wherein the mounting sleeve (60, 80) is installed in the connecting part (42) outer tube (40).

9. Drill column 6 or 7, wherein the mounting sleeve (60, 80) equipped with cable channel (76, 96) for wire (17) power transmission and/or data.

10. The drillstring on any one of claims 1 to 3, 6, 7, wherein the first item (10) of the drill string and/or the second element (11) of the drill string is equipped with an opening cover (18) for access to the wire (17) power transmission and/or data.