EP3029262A1 - Drilling rod, connection system, ground drilling device and method for connecting a drilling rod - Google Patents

Abstract

The invention relates to a Bohrgestängeschuss (1) with at least one plug-rotary recording (bayonet mount) (2) for interacting with a (bayonet) driver (5), wherein the receptacle an additional plug-in step for fixing the driver in a rotationally fixed connection in both directions of rotation about the longitudinal axis of Bohrgestängeschusses allowed.

Description

The invention relates to a Bohrgestängeschuss, a connection system of a Erdbohrvorrichtung, a Erdbohrvorrichtung and a method for connecting a Bohrgestängeschusses.

Erdbohrvorrichtungen, in particular horizontal drilling, are used to bring in trenchless construction Erdbohrungen example for supply and disposal lines in the ground or already laid old lines trenchless exchange. For the introduction of the well, a Bohrgestängeschüsse exhibiting drill string is usually used in which the Bohrgestängeschüsse with each other, with drill heads and / or a drive can be connected.

It is known to design Bohrgestängeschüsse such that the Bohrgestängeschüsse have an internal thread at one end and are provided at the other end with an external thread. Thus, a Bohrgestängeschuss with its male thread end having in a corresponding internal thread in another Bohrgestängeschuss - or vice versa - be screwed.

Out DE 41 16 771 C2 It is known to connect Bohrgestängeschüsse by means of a quick coupling. The quick coupling may be an at least unidirectional twisted bayonet lock capable of both tensile and shear forces as well as rotational forces take. From DE 41 16 771 C2 known Bohrgestängeschüsse can be connected by axial mating and subsequent radial rotation tensile and shear resistant together. To secure the connection against rotation describes the DE 41 16 771 C2 the use of a cross pin.

A disadvantage of the known prior art is the use of an additional component - the transverse pin - to produce a rotationally fixed connection in both directions of rotation about the longitudinal axis of Bohrgestängeschüsse. It requires additional material and additional process steps to connect the drill string and loosen it after creating the wellbore. In particular, the removal of the cross pin may be difficult and / or time consuming due to the harsh conditions of earth boring.

The invention therefore an object of the invention to provide an improved Bohrgestängeschuss, with a simpler design of a rotationally fixed connection in both axial directions of rotation is possible. Furthermore, an improved connection system and an improved earth boring device should be provided. Furthermore, a method should be specified, with which an improved connection of a drill string is possible.

This object is achieved by the subject matters of the independent claims. Advantageous developments of the subjects of the independent claims are the subject of the respective dependent claims and will become apparent from the following description.

The idea underlying the invention is to develop a bayonet connection, which consists of a plug-in rotary connection, such that in addition to the steps of plugging and turning another plug-in step is performed by a rotationally fixed connection about the longitudinal axis of Bohrgestängeschusses is reached. With the Bohrgestängeschuss a paddle operation of the drill string is possible in particular.

A "drill string" in the context of the invention comprises a rod section of an earth boring device. A "Erdbohrvorrichtung" is in particular any device understood that a Bohrgestängeschüsse having Bohrgestänge moved in an existing or to be created channel in the ground to create a bore, especially a horizontal bore, or widen or retract lines or other long body in the soil , The earth boring device may in particular be an HD device (horizontal drilling, horizontal drilling). An inventive "Erdbohrvorrichtung" comprises a a drill pipe driving device that works soil displacing, and the drill string at least over a partial angle range rotating in the longitudinal axial direction of the drill string can be driven. If the linkage is moved over an angular range in both directions of rotation in the direction of the longitudinal axis of the drill pipe, this is referred to as paddle operation.

The term "HD" in the context of the present invention includes in particular any type of existing or to be created, preferably horizontal or inclined to the horizontal channels in a body, in particular earth channels including earth boreholes, rock holes or ground lines and underground or above-ground pipelines and water channels, through Use a suitable Erdbohrvorrichtung produce or pull.

An inventive Bohrgestängeschuss has at least, in particular end, a plug-rotary recording, a so-called bayonet mount, for cooperation with a driver, the so-called bayonet driver on. In addition to the plug-in rotary receptacle, the receptacle allows an additional plug-in step for fixing the spreader in a rotationally fixed in both directions of rotation connection about the longitudinal axis of the Bohrgestängeschusses.

The receptacle, which in particular can be arranged at the end on the drill string section, enables the drill string section to be set into one another with the catch by means of a plug, the drill string section and the catch being aligned with one another in the longitudinal axial direction of the drill string section. After the axial insertion of the Bohrgestängeschusses in the axial direction relative to the driver of Bohrgestängeschuss can be rotated relative to the driver about the longitudinal axis, so that the Bohrgestängeschuss and the driver in the direction of insertion no longer aligned such that Bohrgestängeschuss and driver in the direction of insertion or against this no longer can be separated. The connection obtained by the plug rotation steps is thus tensile. After the drill string and dog have been rotated relative to each other, the receptacle allows another mating step, especially in the longitudinal axial direction of the drill string, to cause the surfaces cooperating during rotation (in the rotating step) to become out of alignment and twisting Rotation to form the connection no release of Bohrgestängeschusses from the driver allows. Through the further insertion step Bohrgestängeschuss and drivers can be fixed so that a rotationally fixed connection about the longitudinal axis of the Bohrgestängeschusses in both directions of rotation is possible. Through the additional plug-in step drill string and driver can be aligned so that Bohrgestängeschuss and driver have cooperating surfaces that in plant get to each other at the additional plug-in step, and fix Bohrgestängeschuss and driver rotationally fixed in both directions of rotation.

An inventive Bohrgestängeschuss thus allows a simple embodiment of a compound with a driver, in which a rotational movement of the Bohrgestängeschusses in both directions of rotation about the longitudinal axis of Bohrgestängeschusses is possible. In addition, the Bohrgestängeschuss, a way to recover the linkage by means of a pulling movement, since by forming a rotation between Bohrgestängeschuss and driver and prior alignment and plugging Bohrbarängeschuss and driver to each other, the driver can be rotated relative to the Bohrgestängeschuss, so that an inner contour of Driver and an outer contour of a Bohrgestängeschusses are no longer aligned. In addition to the pulling movement with which the linkage can be recovered, a possible rotational movement for releasing in one direction, namely in the direction for forming the connection in the rotational step is possible.

The driver may be formed on a Bohrgestängeschuss invention, so that the driver is formed at one end of a Bohrgestängeschusses and a corresponding receptacle for the driver at the other end of the Bohrgestängeschusses. But it can also be provided that the Bohrgestängeschuss only at one end has a receptacle for the driver. In particular, it may be provided that a drill string section provided at the front end of the drill string and connected to the drill head has a receptacle for the catch at only one end and a different type of connection is provided at the other end. Furthermore, it can also be provided that at the end region of the Bohrgestängeschusses on which the (bayonet) receptacle is formed, a further connecting element is formed. For example, at the end a conical thread can also be formed, by means of which the drill string sections can be screwed together and the driver is formed only on the drive or a carriage of an earth drilling device.

The term "at least one" as used in the claims or the specification, as well as the indefinite article "a" used in the claims and the description - also in corresponding grammatical expressions relating to gender and declination - includes in reference to the referenced noun exactly one or more, ie two, three, four, etc., the elements denoted by the noun.

The recording of the drill string according to the invention comprises in a preferred embodiment an alignment section, a rotary section and a paddle section on. The three sections of the receptacle may allow the individual steps to form the connection, ie insertion, rotation and insertion. By means of the alignment section, the Bohrgestängeschuss and the driver can be aligned axially, so that plugging can be done after aligning each other. By means of the rotary portion of the Bohrgestängeschuss and the driver can be rotated relative to each other about the longitudinal axis, preferably by 45 °. The paddle section allows for the relative rotation of Bohrbarängeschuss and driver required plugging of Bohrgestängeschuss and driver relative to each other. The plugging in the sense of the invention takes place by a relative movement of Bohrgestängeschuss and driver in the axial direction towards each other. In the paddle section are in both directions of action of the Bohrgestängeschusses and the driver before, which are in contact with each other to ensure the rotationally fixed connection in both directions of rotation. The alignment section is more closely spaced than the pivot section and the paddle section with respect to the end of the drill string at which the connection is formed. The rotary section is spaced closer to the end of the drill string section where the connection is to be formed than the paddle section. In particular, aligning section, rotating section and paddle section can follow each other directly from the end of the drill string section where the connection is to be formed.

In a preferred embodiment, the receptacle has an axial seating surface and a paddle surface for the driver. The axial Aufsitzfläche is a the driver or the end of the Bohrgestängeschusses facing surface against which the driver reaches the additional plug-step in abutment with a surface and finished the movement during the insertion step between Bohrgestängeschuss and driver. The paddle surface for the driver ensures the rotation-resistant connection, wherein the driver rests with a corresponding surface on the paddle surface. The seating surface may in particular have a surface normal which runs parallel to the longitudinal axis of the drill string section. The paddle surface may in particular have a surface normal which is parallel to a radial direction. There may be more than one seating surface and / or more than one paddle surface. For example, there may be four paddle surfaces. It may result in a lower surface pressure.

In a preferred embodiment, two paddle surfaces are formed on Bohrgestängeschuss, which are arranged angularly offset from the longitudinal axis of the Bohrgestängeschusses. The formation of two paddle surfaces a safe training of the rotationally fixed connection in the two directions of rotation is possible. For every the two directions of rotation may be provided a paddle surface for the driver.

Preferably, a portion for longitudinal axial alignment of the Bohrgestängeschusses to the driver is formed (alignment portion) in an angular range about the longitudinal axis of Bohrbarängeschusses a projection relative to another portion in which the driver is rotatable about the longitudinal axis of the Bohrgestängeschusses (rotary section). The projection may be configured such that the driver prevents a stop for axial movement of the driver for Bohrgestängeschuss after the relative rotation of the driver to the Bohrgestängeschuss. The term "projection" may include a macroscopic projection on a peripheral surface of the drill string section. The macroscopic elevation may preferably be localized. The survey may protrude from the surface. In particular, the projection may protrude with respect to a lateral surface of the rotary section. In particular, four projections may be formed.

The section for longitudinal axial alignment of the Bohrgestängeschusses is preferably formed symmetrically, so that one or more existing projections which are provided as a stop for limiting an axial relative movement between Bohrgestängeschuss and driver are angularly offset from each other winkeläquidistant formed about the longitudinal axis of Bohrgestängeschusses.

In a preferred embodiment, the longitudinal axial extent of the portion in which the driver is rotatable about the longitudinal axis of the drill string (rotational portion), substantially equal to the longitudinal axial extent of an inner contour of the driver, so that Bohrgestängeschuss and drivers can be rotated relative to each other and the rotation is guided in the longitudinal axial direction.

In a preferred embodiment, the portion in which the driver is rotatable about the longitudinal axis of the drill string (rotary portion) has a longitudinal movement stop surface and a rotation stop surface disposed relative to each other such that the driver contacts with the rotational movement stop surface is out of contact with the longitudinal movement stop surface and the driver is pluggable relative to another portion (paddle portion).

The invention also provides a connection system of a Erdbohrvorrichtung for connecting an aforementioned Bohrgestängeschusses with a driver and a Erdbohrvorrichtung with one of the aforementioned Bohrgestängeschüsse.

Further, the invention provides a method of connecting a drill string to a driver, the method comprising the steps of: inserting the drill string relative to the driver in the longitudinal direction of the drill string, rotating the drill string relative to the driver about the longitudinal axis of the drill string and inserting the drill string relative to the driver in the longitudinal direction of the Bohrgestängeschusses, wherein the driver is brought into contact with the Bohrgestängeschuss such that a rotationally fixed connection is formed in both directions of rotation to the longitudinal axis of the Bohrgestängeschusses.

The above statements as well as the following description of exemplary embodiments do not represent a waiver of certain embodiments or features.

• In den Zeichnungen zeigt:

  Fig.1

  eine isometrische Darstellung eines endseitigen Bereichs eines Bohrgestängeschusses und einen Mitnehmer;

  Fig. 2

  den Mitnehmer und den endseitigen Bereich des Bohrgestängeschusses gemäß Fig. 1 in einer aufgesteckten Position in isometrische Darstellung;

  Fig. 3

  eine stirnseitige Ansicht des auf dem Bohrgestängeschuss aufgesetzten Mitnehmers gemäß Fig. 2;

  Fig. 4

  eine Seitenansicht gemäß Fig. 2 und eine Schnittdarstellung; und

  Fig. 5

  eine Seitenansicht sowie Schnittdarstellungen des Mitnehmers und des Bohrgestängeschusses nach dem Ausbilden einer rotationsfesten Verbindung

The invention will be explained in more detail with reference to an embodiment shown in the drawings:

• In the drawings shows:

  Fig.1

  an isometric view of an end portion of a Bohrgestängeschusses and a driver;

  Fig. 2

  the driver and the end region of the Bohrgestängeschusses according to Fig. 1 in an attached position in isometric view;

  Fig. 3

  an end view of the patch on the Bohrgestängeschuss driver according to Fig. 2 ;

  Fig. 4

  a side view according to Fig. 2 and a sectional view; and

  Fig. 5

  a side view and sectional views of the driver and the Bohrgestängeschusses after forming a rotationally fixed connection

Fig. 1 schematically shows an end portion of a Bohrgestängeschusses 1, which has a receptacle 2, which comprises a plug-and-turn receptacle 3. The receptacle 2 further comprises a section 4, which allows an additional plug-in step for fixing a driver 5, wherein in the additional plug-in step, the driver 5 to Bohrgestängeschuss 1 and the receptacle 2 of Bohrgestängeschusses 1 is positioned such that the driver 5 in both directions rotationally fixed to Bohrgestängeschuss 1 rests.

The end region of the Bohrgestängeschusses 1 has a conical end 6, to which an alignment section 7 connects. At the end 6, an external thread can be configured, which is designed according to an internal thread of another Bohrgestängeschusses. Spaced to the illustrated end of Bohrgestängeschusses 1 a rotary section 8 is formed, on which a paddle section 9 is further spaced from the end of Bohrgestängeschusses 1 is formed.

In Fig. 2 the driver 5 is pushed onto the receptacle 2 of the Bohrgestängeschusses 1 and the alignment section 7 is positioned in an inner contour of the driver 5, that a free passage for the alignment section 7 is present in the driver 5 and the driver 5 relative to the Bohrgestängeschuss 1 about the longitudinal axis of Bohrgestängeschusses 1 can be rotated. In the in Fig. 2 shown position of driver 5 and drill string 1, the Bohrgestängeschuss 1 with the driver 5 in Appendix. A longitudinal movement stop surface 10 on the drill string 1 limits the axial movement of the driver 5 when plugging and serves as a support during rotation. The rotation of the driver 5 relative to the drill string section 1 is limited by a rotational movement stop surface 14.

In Fig. 3 is the Bohrgestängeschuss 1 with the driver 5 in the position of Fig. 2 shown from the front.

Fig. 4 shows a side view of the pushed onto the Bohrgestängeschuss 1 driver 5 and a sectional view according to the plane AA.

Fig. 5 shows the driver 5 with the Bohrgestängeschuss 1 after a relative rotation of the driver 5 to Bohrgestängeschuss 1 about the longitudinal axis of Bohrgestängeschusses 1 and advancing the driver 5 relative to Bohrgestängeschuss 1 in a side view and in a sectional view according to the planes BB, CC shown in the sectional view and DD. In the in Fig. 5 illustrated position of Bohrgestängeschusses 1 to the driver 5, the recess in the carrier 5 and the alignment formed on the 7 projections 7 are no longer aligned with each other, so that there is a tensile load on a tensile load of driver 5 for Bohrgestängeschuss 1. The driver 5 strikes at a tensile load on the projections 11 formed on the alignment section 7.

Moreover, in the in Fig. 5 shown position a rotationally fixed connection in both directions between the driver 5 and the Bohrgestängeschuss 1 is formed. The Bohrgestängeschuss 1 has two paddle surfaces 12, which are in abutment with formed on the driver 5 Drehbewegungsmitnahmeflächen 13.

Claims (12)

Bohrgestängeschuss (1) with at least one plug-rotary recording (bayonet mount) (2) for cooperation with a (bayonet) driver (5), characterized in that the receptacle (2) has an additional plug-in step for fixing the Driver (5) in a rotationally fixed in both directions of rotation connection around the longitudinal axis of Bohrgestängeschusses (1) allowed. A drill string (1) according to claim 1, wherein the receptacle (2) comprises an alignment section (7), a rotary section (8) and a paddle section (9). Drill string (1) according to claim 1 or 2, wherein the receptacle (2) has at least one axial Aufsitzfläche and at least one paddle surface (12) for the driver (5). A drill string (1) according to claim 3, wherein two paddle surfaces (12) angularly offset from the longitudinal axis of the drill string (1) are formed. A drill string (1) according to any one of claims 1 to 4, wherein a portion (4) for longitudinal axial alignment of the Bohrgestängeschusses (1) to the driver (5) is formed, in an angular range about the longitudinal axis of the Bohrgestängeschusses (1) has a projection (11 ) relative to another portion in which the driver (5) is rotatable about the longitudinal axis of the Bohrgestängeschusses (1). Drill string (1) according to claim 5, wherein the portion (4) for longitudinal axial alignment of the Bohrgestängeschusses (1) is symmetrical. A drill string (1) according to claim 5 or 6, wherein the longitudinal axial extension of the portion (4), in which the driver (5) is rotatable about the longitudinal axis of the Bohrgestängeschusses (1), substantially the longitudinal axial extent of an inner contour of the driver (5). equivalent. A drill string (1) according to any one of claims 5 to 7, wherein the portion (4) in which the dog (5) is rotatable about the longitudinal axis of the drill string (1) comprises a longitudinal movement stop surface (10) and a rotational movement stop surface 14 arranged, which are arranged such that the driver (5) when in contact with the rotational movement stop surface (14) is out of contact with the longitudinal movement stop surface (10) and the driver (5) is pluggable relative to another portion (4). Connection system of an earth drilling device for connecting a drill string (1) according to one of claims 1 to 8 comprising the drill string (1) and a driver (5). Connection system according to claim 9, wherein the driver (5) is formed on a drive and / or on another drill string (1). An earth drilling device with a drill string (1) according to one of claims 1 to 8 and a driver (5). Method for connecting a drill string (1) to a driver (5), the method comprising the steps of: inserting the drill string (1) relative to the driver (5) in the longitudinal direction of the drill string (1), rotating the drill string (1) relative to the driver (5) about the longitudinal axis of the Bohrgestängeschusses (1) and plugging the Bohrgestängeschusses (1) relative to the driver (5) in the longitudinal direction of the Bohrgestängeschusses (1), wherein the driver (5) is brought into abutment with the Bohrgestängeschuss (1) in that a rotation-resistant connection is formed in both directions of rotation relative to the longitudinal axis of the drill string section (1).

Images