EP1892371B1 - Device for attaching drill pipes - Google Patents

Abstract

The device has an adjustable segments (5) provided with a conical outer contour, where clamp mounting of drill pipes is adjustable by the vertical adjustment of the segments opposite a ring body of a retaining unit (1) by a controllable servo cylinder that is attached above the segments. The servo cylinder charges in an outer region of the segments through ribs (9). The ribs hold a guide rod (8) with corresponding ribs (10) of the ring body, where the guide rod guides a stretchable pressure spring (14) between the ribs (9, 10).

Description

The invention relates to a device device for implementable vertical support of drill pipes, consisting of a plurality of successively arranged via connecting elements coupled pipe segments, for use on drilling platforms with a releasable support on the drilling table for inserting and pulling out of drill pipes, wherein the drill pipe a holding element for releasing or connecting the connecting elements of the pipe segments and handling is connected by winches and the holding element in the form of an annular body on the drill pipe is placed and in the outer region elements for connection to the winch and the interior of the holding element for receiving the drill pipe vertically adjustable segments as jaws to Has change in the receiving diameter with a cylindrical receiving area.

Such arrangements are used in the field of offshore drilling platforms to connect or disconnect the plurality of pipe segments arranged one behind the other and connected to one another via connecting elements. It is known to turn holding elements into the end of the pipe segment for handling, to attack via corresponding connections to a wind above the pipe end arranged to make or break the connection between adjacent pipe segments. In this case, the drill pipe is additionally supported on the drilling table in order to prevent slippage and the resulting sinking of the drill pipe into the water.

Arrangements for handling and holding of drill pipes are known from DE-42 27 645 A1 and the DE-697 24 670 T2 known. However, it is necessary in this case that pipe shoulders are present on the drill pipes in order to allow handling. It is also necessary that an intermediate ring is interposed as a so-called setting ring, which still suppresses the wedge elements.

These designs often cause damage and cause the elevator rings used to close properly.

Even after the WO2005 / 106185 A training has been proposed in accordance with the aforementioned training with the identified deficiencies. In this case, it is not possible to set an initial clamping action to allow safe handling. This document is considered to be the closest prior art and offers the features in the preamble of claim 1.

The object of the invention is to provide a simple design of a retaining element, which ensures a secure fixation of the pipe segment without pipe shoulders or attachment pieces with the required security and the holding forces are automatically adjustable by the weight of the coupled pipe segments in the annular body of the holding element.

The solution of this object is achieved according to the invention in that the adjustable segments have a conical outer contour and are guided via a corresponding conical guide in the annular body of the holding element displaceable for changing the diameter of the receiving opening, wherein associated by the vertical adjustment of the segments relative to the annular body of the holding element by means of above the segments controllable actuating cylinder on the holding element for narrowing the receiving opening a clamping holder of the recorded drill pipe is adjustable, wherein the actuating cylinder attack via formed ribs in the outer region of the segments and the ribs of the segments with corresponding ribs of the annular body of the holding element receive a guide rod for holding a tensioned compression spring between leads to the ribs.

By this arrangement, a simple handling is achieved by placing the ring body on the drill pipe as a holding element and setting an initial clamping action on the relatively small actuating cylinder acting on the segments. The actual holding forces are set automatically by the weight of the pipe segments, with an adjustment of the segments performed and the retaining ring serves as a camp. Thus, the actuating cylinders do not have to apply the holding forces for the pipe segments, but only adjust the initial clamping action to take along the pipe segments.

An advantageous embodiment is provided in that the actuating cylinder arranged on the annular body of the holding element acts via a sleeve in each case on a rib of the segment for adjustment.

A simple design is achieved in that the adjusting elements for the adjustment of the segments are formed by arranged on the annular body compressed air cylinder.

In order to enable a uniform force distribution, it is proposed that the arranged compressed air cylinders are coupled together as adjusting elements for the segments.

To improve the adaptation and increase the fixation, it is proposed that the receiving surface of the segments for the drill pipes by inserted clamping elements having contact surfaces in the form of a sawtooth profile.

Furthermore, it is provided that the holding element is designed as a hinged and lockable ring body.

Fig. 1

eine Seitenansicht eines Halteelementes;

Fig. 2

eine Draufsicht gemäß Fig. 1;

Fig. 3

einen Teilschnitt gemäß Linie III- III der Fig. 2 und

Fig. 4

eine vergrößerte Detailansicht der Einzelheit IV der Fig. 3.

In the drawing, an embodiment of the invention is shown schematically. Show it:

Fig. 1

a side view of a holding element;

Fig. 2

a plan view according to Fig. 1 ;

Fig. 3

a partial section according to line III-III of Fig. 2 and

Fig. 4

an enlarged detail view of the detail IV of Fig. 3 ,

In the illustrated arrangement, a holding element 1 for receiving a drill pipe not shown in the form of a pipe segment is shown as a hinged ring body. This annular body 1 is formed by two hinge-like pivotable elements 2 and 3, which are closable and lockable after wrapping a pipe segment. Of course, it is possible to form the retaining element as a closed annular body 1 and to receive it on a pipe segment via a central receiving opening 4.

The receiving opening 4 is to be adjusted in its cross section over four segments 5, wherein the segments 5 are formed as acting on the recorded pipe segment clamping jaws and vertically adjustable. For this purpose, the segments 5 have a conical outer contour 6 and a corresponding guide 7 in the annular body as a holding element. 1

The segments 5 are held via a guide rod 8 in the annular body 1, wherein the guide rod 8 are held by ribs 9, 10 on the segment 5 and the ring body 1.

Above the segments 5 pneumatic actuating cylinders 11 are arranged, which are controllable via lines 12 and the segments 5 vertically down through an intermediate sleeve 13 and cause a reduction of the receiving opening 4 on the conical surfaces 6 and 7 and perform a clamping action on the recorded pipe segment ,

The actuating cylinder 11 with the intermediate sleeve 13 act on the ribs 9 of the segments 5 a.

To increase the restoring forces when releasing the clamping action, a tensionable compression spring 14 between the ribs 9, 10 of the segment 5 and the retaining ring 1 on the guide rod 8 is arranged.

The actuating cylinder 11 are fixed via a housing 15 on the ring element 1.

The cylindrical receiving surface of the segments 5 for the drilling segments is formed in this embodiment by inserted clamping elements 16 with sawtooth.

For insertion and removal of the drill pipes, a winch is arranged above the ring element 1 with the recorded drilling segment, which engage on both sides on the ring element 1 via elements 17 as a receptacle for shackles 18 or the like, as in Fig. 2 is indicated.

This makes it possible to fix the ring member 1 according to the pipe segments for holding and implement and adjust the positioning of the pipe segment via the winch to perform a mounting or dismounting of the connecting elements between the pipe segments.

Claims (6)

1. Device for the rotatable vertical support of casing pipes, comprising a plurality of successively arranged pipe segments connected by connection elements, for use on drilling platforms with a detachable mounting on the rotary table for the insertion and withdrawal of casing pipes, wherein the device comprises a retaining element (1), which is connectable for detaching and/or connecting the connection elements of the pipe segments and for handling purposes by winches to the casing pipe, and wherein the retaining element (1) has the shape of an annular body, is mountable onto the casing pipe and in the outer region has elements (17) for attachment to the winch, and wherein the interior (4) of the retaining element (1) for receiving the casing pipe possesses vertically adjustable segments (5) with a cylindrical receiving region as clamping jaws for varying the receiving diameter, wherein the adjustable segments (5) have a conical external contour (6) and are guided by means of a corresponding conical guide (7) in the annular body of the retaining element (1) in a displaceable manner for varying the diameter of the receiving opening (4), wherein in the outer region of the segments (5) ribs (9) are formed, which with corresponding ribs (10) of the annular body of the retaining element (1) receive for support a guide rod (8), which guides a tensionable compression spring (14) between the ribs (9, 10), characterized in that the device comprises controllable actuating cylinders (11), which are disposed on the retaining element (1) above the segments (5) and which act via the ribs (9) formed in the outer region of the segments, wherein by means of the vertical adjustment of the segments (5) relative to the annular body of the retaining element (1) by means of associated controllable actuating cylinders (11) a clamping support of the received casing pipe is adjustable for narrowing the receiving opening (4).
2. Device according to claim 1, characterized in that the actuating cylinders (11) disposed on the annular body of the retaining element (1) acts for adjustment purposes via a sleeve (13) in each case upon a rib (9) of the segment (5).
3. Device according to claim 1, characterized in that the actuating cylinders (11) for adjustment of the segments (5) are formed by pneumatic cylinders disposed on the annular body (1).
4. Device according to claim 1 or 2, characterized in that the disposed pneumatic cylinders (11) are coupled to one another as actuating elements for the segments (5).
5. Device according to one of claims 1 to 4, characterized in that the receiving surface of the segments (5) for the casing pipes comprise by inserted clamping elements (16) having contact surfaces in the form of a saw-tooth profile.
6. Device according to one of claims 1 to 5, characterized in that the retaining element (1) takes the form of a fold-open and lockable annular body.

Images