CN101346528B

CN101346528B - Wedge device

Info

Publication number: CN101346528B
Application number: CN200780000971.4A
Authority: CN
Inventors: 黑格-鲁本·哈瑟
Original assignee: Weatherford Drilling System Co ltd
Current assignee: Weatherford Drilling System Co ltd; V Tech AS
Priority date: 2006-04-27
Filing date: 2007-04-26
Publication date: 2014-04-16
Anticipated expiration: 2027-04-26
Also published as: CN101346528A; NO20061861L

Abstract

A wedge device (1) for clamping of pipes (24) and tools during petroleum production, the wedge device (1) comprising an annular mounting element (4) arranged for connection to a deck (2) or a rotary table, where a plurality of main wedges (6), with associated clamps (22) and displaceable with respect to the annular mounting element (4), encircle the vertical central axis (8) of the wedge device (1), and where the clamp (22) is located on an auxiliary wedge (18) displaceably or rotatably coupled to the main wedge (6).

Description

Wedge device

Technical field

The present invention is a Wedge device.Or rather, be the Wedge device of clamping tube and an instrument in process of oil production.This Wedge device comprises one for being connected to the annular assembling element of platform or turntable, and some are with the main chock of fixture, and described main chock can move with respect to annular assembling element, and its can around the vertical center axis of Wedge device around.Each fixture is placed in mobile link to the auxiliary wedge of main chock.

Background technology

Traditionally, the trepan in process of oil production hangs pipe with Wedge device, especially in rig floor.

According to prior art, conventionally use the so-called lath being placed in conical ring, when pipe and lath move down in conical ring, this lath can clamping tube.

Typically use hydraulically powered fixture and hang pipe.

These well-known methods have a common feature: because uncertain operation is frequently used, and can be with safe clamp pipe when lath or hydraulic-driven fixture move with pipe.The size range of the common applicable pipe of device of use prior art is relatively little.In order normally to work, just need different parts like this when using the pipe of different-diameter.

Before great normal load is placed on lath, lath is also difficult to accept any torque.

Summary of the invention

The object of the invention is to revise or reduce at least one defect that prior art exists.

According to the present invention, by below with claims in the feature described, can realize above-mentioned purpose.

A kind of according to the present invention at the Wedge device of process of oil production clamping tube and instrument, this Wedge device comprises one for being connected to the annular assembling element of platform or turntable, some main chocks with fixture can jockeies and are moved with respect to annular assembling element, and its can around the vertical center axis of Wedge device around.It is characterized in that fixture be placed in one be connected to respect to main chock move or the auxiliary wedge that rotates on.

Be more easily, main chock is by independent hydraulic-driven, angle between central axis and main chock moving direction is through special selection, so the difference between the spacing of the fixture in retraction open mode and the spacing of fixture in stretching closed condition is acceptable, and if hydraulic-driven lose hydraulic pressure and can prevent that main chock is unexpected outwards mobile.

Angle between central axis and auxiliary wedge moving direction is through special selection, to guarantee that weight that auxiliary wedge can be fixed on the pipe in fixture in main chock is toward drop-down.

Angle between central axis and auxiliary wedge moving direction is just significantly less than the angle between central axis and main chock moving direction like this.

According to application, the angle between central axis and main chock moving direction be 0 degree between 60 degree, the angle between central axis and auxiliary wedge moving direction has very good effect at 5 degree between 30 degree.

According to application, if the angle between central axis and auxiliary wedge moving direction is necessary for 0 degree between 30 degree, the angle between central axis and auxiliary wedge moving direction has very good effect at 1 degree between 10 degree.

Between auxiliary wedge and main chock, by spring, connected.This spring passes to main chock for the vertical force that auxiliary wedge is produced.

If hydraulic pressure is lost, Compress Spring can make auxiliary wedge move relative to main chock.Along with the disengaging of fixture, spring can make auxiliary wedge move to its initial position with respect to main chock.

The structure design of wedge device shows, without the part of changing wedge device, just can within the scope of relatively large pipe diameter, operate wedge device.The design of the auxiliary wedge of this chock that comprises two main chock shapes and common running can prevent that pipe slides in wedge device in hydraulic pressure forfeiture situation.

Control interlocking and chock in groups and also can guarantee that pipe can surprisingly not unclamp.For example, when pipe weight is relatively low, just need to extra positional safety clamp be installed around at pipe.

Accompanying drawing explanation

In accompanying drawing below, unconfined preferential embodiment can be described, wherein:

Fig. 1 is the phantom drawing according to Wedge device of the present invention;

Fig. 2 is the vertical section III-III of the Wedge device in Fig. 3, and this Wedge device is in retracted mode;

Fig. 3 is the plan view of Wedge device in Fig. 2;

Fig. 4 is the vertical section V-V of Wedge device in Fig. 5, and 3 chocks are all in full extended configuration;

Fig. 5 is the plan view of Wedge device in Fig. 4;

Fig. 6 is the vertical cross section of chock integral body;

Fig. 7 is the VI-VI part of Fig. 6;

Fig. 8 is the plan view of Wedge device, and wherein 3 chocks and other 3 chocks are tightly locked mutually; With

Fig. 9 demonstrates an alternative embodiment, and wherein auxiliary wedge is comprised of the pivot wedge of centrifugal support.

The specific embodiment

In diagram, numeral 1 represents a Wedge device that is arranged in platform 2, and it comprises an annular assembling element 4 and some main chocks 6 around Wedge device 1 vertical axis 8.

The annular assembling element 4 being connected on offshore boring island 2 is comprised of two parts, and is furnished with connecting bolt 10.In needs, annular assembling element 4 just can be opened like this.

Each main chock 6 is connected with a fixture 12 movably, especially by a main guiding device 14.This main guiding

device

14 and 8 of central axiss have an angle, see Fig. 6.In this preferential embodiment, this angle is 20 degree.

A hydraulic cylinder 16 is connected in an articulated manner between fixture 12 upper parts and main chock 6.Hydraulic cylinder 16 is connected with hydraulic control system (not shown) with pipe 5 connector (not shown)s by flexible pipe, and can see Fig. 3 in retraction open mode, and stretches closed condition, sees Fig. 5, in controllable synchronous mode, along main guiding device 14, moves main chock 6.

An auxiliary wedge 18 is connected with main chock 6 movably by an

auxiliary guide

20, and 8 of auxiliary guide and central axiss form certain angle, see Fig. 6.In this preferential embodiment, angle is 5 degree.

Towards central axis 8 one sides, auxiliary wedge 18 is furnished with a fixture 22.These fixture 22 structure shapes can tightly mesh the pipe 24 that is positioned at clamping device 1, see Fig. 5.This fixture 22 can be comprised of independent material, or can be used as the built-in part of auxiliary wedge 18.

Main guiding device 14 and auxiliary guide 20 are all for accepting torque.

Main chock 6 is furnished with a Compress Spring 26, stretches out with central axis 8 is parallel, is against on the flank 28 of auxiliary wedge 18.Compress Spring 26 just can reach main chock 6 from auxiliary wedge 18 by power like this.

When auxiliary wedge 18 is by equidirectional when mobile with spring 26 power, just can the stop wedge-lock 30 of the relative side of Compress Spring 26 of flank 28.Wedge-lock 30 just can prevent that auxiliary wedge 18 from shifting out from auxiliary guide 20 like this.Also can stop auxiliary wedge 18 to shift out from auxiliary guide 20 in downward direction.

Fixture 12 is furnished with a dovetail 32, sees Fig. 7, and it is that an addition item is in order to be applicable to the dovetail groove 34 in annular assembling element 4.

Fixture 12, main chock 6, auxiliary wedge 18 and hydraulic cylinder 16 have formed a wedge 36, and this wedge can be very easily by replacing in conjunction with 32 and 34 with dovetail.This point has operated relevant oil drilling and has interfered highly beneficial.

In preferential embodiment, Wedge device 1 is used for gripping range, and from diameter 60mm, (2 3/s ") are to the pipe of daylight opening 330mm (13 ") and without change wedge 36.The scope that another set of wedge 36 covers is from diameter 241mm (9.5 ") to daylight opening 483mm (19 ").

For clamping tube 24, according to the size of pipe, three or six main chocks 6 are synchronously moved towards pipe 24 by hydraulic cylinder 16 drivings separately, and fixture 22 is clamping tube 24.The synchronous extension of main chock 6 makes the fixture 22 can be at the center of Wedge device 1 clamping tube 24.

If pipe 24 diameters are relatively little, just only have three fixtures 22 can clamp pipe 24.Remaining main chock 6 still can move near the main chock clamping.Control device (not shown) upwards connects in a kind of mode that can only unclamp three fixtures when the operating mistake, can prevent from like this unclamping and falling into (not shown) in well beyond pipe.

If cylinder 16 loses hydraulic pressure, because the weight of the pipe 24 that relatively fixture 22 hangs, chock 18 still can be pulled down in main chock 6, so just can be with a stronger clamp pipe 24.

In a selectable embodiment, auxiliary wedge is comprised of the pivot wedge 38 of a centrifugal support, and this pivot wedge can be around axle 40 rotations.With respect to main chock 6, the operation mode of pivot wedge is identical with foregoing description, and the gradient of pivot wedge 38 is specifically shown in Fig. 9.

Pivot wedge is furnished with a clamping surface 42 that is used for clamping pipe 24.In Fig. 9, do not show pipe 24.Downward power from pipe 24 can make pivot wedge 38 rotations that it is stepped up with engaging more of pipe 24.Pivot wedge 38 is comprised of several identical metal sheets.

Claims

1. one kind for the Wedge device (1) at process of oil production clamping tube (24) and instrument, and this Wedge device (1) comprises: one for being connected to the annular assembling element (4) of platform (2) or turntable, some main chocks (6), described in each, main chock (6) is connected with a fixture (12) movably, and can be mobile with respect to annular assembling element (4), and can around the vertical center axis (8) of Wedge device (1) around, be connected to the auxiliary wedge (18) of main chock, and be placed in the fixture (22) on auxiliary wedge (18), it is characterized in that, more described main chocks (6) have six main chocks, auxiliary wedge (18) can move or connect rotatably with respect to main chock (6), wherein, for clamping tube (24), according to the size of pipe, three or six main chocks (6) are driven synchronously mobile towards pipe (24) by hydraulic cylinder (16) separately, if pipe (24) diameter is relatively little, just only have three fixtures (22) can clamp pipe (24), remaining main chock (6) still can move near the main chock clamping.

2. a kind of Wedge device according to claim 1, is characterized in that central axis (8) and the angle (b, c) between auxiliary wedge (18,38) moving direction are less than the angle (a) between central axis (8) and main chock (6) moving direction.

3. a kind of Wedge device according to claim 1, is characterized in that the angle (a) between central axis (8) and main chock (6) moving direction is that 5 degree are to 30 degree.

4. a kind of Wedge device according to claim 1, is characterized in that central axis (8) and the angle (b, c) between auxiliary wedge (18,38) moving direction are that 0 degree is to 30 degree.

5. a kind of Wedge device according to claim 1, is characterized in that central axis (8) and the angle (b, c) between auxiliary wedge (18,38) moving direction are that 1 degree is to 10 degree.

6. a kind of Wedge device according to claim 1, is characterized in that by a spring (26), being connected between auxiliary wedge (18) and main chock (6), and this spring (26) is for passing to main chock (6) by power from auxiliary wedge (18).

7. a kind of Wedge device according to claim 1, is characterized in that wedge-lock (30) is for preventing that auxiliary wedge (18) from being shifted out from its guiding device (20).

8. a kind of Wedge device according to claim 1, it is characterized in that main chock (6) is mobile along the main guiding device (14) in fixture (12), fixture (12) is furnished with a dovetail (32), and this dovetail is that an addition item is to be applicable to the dovetail groove (34) in annular assembling element (4).