JPS6290494A - Pipe support apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The invention relates to a pipe support device, in particular for use on an excavation platform, and more particularly for use on pipe support devices, in particular on drilling platforms. Related to types of pipe support devices.

[Conventional technology]

During the process of drilling an oil or gas well, the entire drill trail must be pulled out and inserted several times.

During this process, a drilling pipe section consisting of approximately 30 meters of drilling pipe is stored vertically inside the drilling derrick. The platform and the drilling derrick are equipped with suitable stands for this purpose, which serve to support the drilling pipe during storage. The stand is called a finger boat.

A finger boat has a number of parallel teeth or "fingers" with a gap between them slightly larger than the outside diameter of the drilling pipe, the gap between the fingers being open at one end through which the drilling pipe can be inserted. Pipes can take finger boats in and out.

The invention particularly relates to a fastening device well adapted to such fingerboards, which is made of the same idea as the pipe support device and which serves to open the fingerboard when removing the drilling pipe from the fingerboat. .

The pipe support device to which the present invention relates is of the type described in Norwegian patent application no. 84 2425. This per se known pipe support device is designed to support the drilling pipe in a large vertical position between the position on the drilling center and the storage position in the fingerboard and vice versa. The device is fixed to a post on a platform deck. The guide arrangement allows the column to move back and forth in a straight line. A vertical shaft supporting the device structure in a transverse position above is rotatably connected to the column. According to Norwegian Patent Application No. 842,425, the upper device structure is supported in two large, vertical, elongated structural parts: a first structural part rotatably connected to a column; It is connected to a second structural part. With this device, the second part can be pressed in and out of the first part, with the crab part maintaining a vertical position. The second part is equipped with a gripping and holding device, which can be opened and closed for the vertical addition of the drilling pipe during support operations.

In order to prevent stored vertically stacked drilling pipes from becoming detached from the fingerboard, a fixing device must be provided to securely hold the drilling pipes in the fingerboard until needed.

[Problem that the invention seeks to solve]

Known fastening devices for this purpose consist of hydraulically or pneumatically operated mechanisms operated by remote control.

In reality, the problem is managing close to 100 drilling pipes, and it has been recognized that known fastening devices for fingerboards are complex and difficult to operate. Moreover, the cost of purchasing and maintaining a large number of fixing devices with remotely controlled hydraulically or pneumatically actuated mechanisms is prohibitive.

[Means for solving problems]

The object of the present invention is an opening and closing device for a fingerboard fixation device that is generally simpler, cheaper and easier to operate. The invention is characterized to this end by what is set out in the following claims.

An embodiment of the device for carrying out the invention is shown in the drawing in connection with a pipe support device of the type described in Norwegian patent application no. 84 2425.

In order to fully understand the structural design and operation of pipe support devices, please refer to Norwegian Patent Application No. 84 242 mentioned in
See No. 5.

〔Example〕

A general explanation of the general role of the pipe support device is that it moves an approximately 30 meter long excavation stream section between an active position 2' on the excavation center 3 and an inactive storage position 2. The pipe section is supported at the bottom by a known grooved base plate 4, and the ffi section is supported in engagement with a so-called finger board 5, where they are held by means of an openable and closable locking device. Retained.

The bottom of the digging derrick 6 is shown in broken lines.

As described in Norwegian Patent Application No. 84 2425, the retractable 1111 holding device 1' has two positions 2
and 2', the drilling pipe is moved and supported in a vertical position by translation and rotation of the columnar part of the device. The fingerboard 5 is generally made of a square cut piece of steel.

The square parts also form fingers 5', between which gaps 5'' are open towards the end and allow the drilling pipe to enter and exit.

To prevent the pipes from leaving the fingerboard 5, standard equipment is provided as shown in Figures 3.4 and 5. This fixing, combination or locking mechanism consists of a number of spring-loaded fixing bolts 7 which enter vertically into the fingers 5' of the square section and are rotatably supported in upper and lower bearings 9 and 10, respectively. are supported in the fingers 5' by respective welding shafts 8, which are attached to the fingers 5'. In the exemplary embodiment, each fixing bolt shaft 8 is surrounded by a helical tail 11, the ends of which are fixed partly to the shaft 8 and partly to the bottom bearing 10. The torsion spring holds the fixing bolts associated through the shaft 8 in an oblique fixed position (see plan view, FIGS. 3 and 5), the free ends of the fixing bolts pointing inwardly; In other words, the person in the gap 5' [1] is away from the end and faces the fingerboard 5. Each fixing bolt is individually rotatable and completely independent of the others, but in pairs the fixing bolts 7 of adjacent fingers 5' seal off the drilling pipe inside thereof.

In the fixed position, the end of the fixing bolt 7 has a stop 1
2, the stop 12 is permanently fixed to the finger 5'. Each fixing bolt has a limited length which, when in the fixed position, partially crosses the fixing gap or gap 5'' between two adjacent fingers 5'.

When the pipe section is placed in the storage position between the fingers of the fingerboard 5, the pipe 2 itself, which is held and moved with the aid of the pipe support device 1 in a vertical position, overcomes the force of the torsion springs Squeezing the fixing bolts 7.7 inward, the pipe thus passes through a pair of fixing bolts and then through another pair or pairs of fixing bolts, until finally the pipe is attached to the finger boat 5. You can stand in any desired position. The horizontal pressure of the vertical pipe 2 held in the pipe handling device acts to deflect the bolt 7 and causes it to pass through the pipe, immediately after which the bolt 7 springs back into its fixed position.

As can be seen from FIG. 3, the pipe section 2 can pass under pressure through several pairs of fastening bolts 7.7 before reaching the storage position.

To open the locking mechanism in order to remove the pipe held on the fingerboard, the invention provides an unlocking head 13.
is provided at the level of the fingerboard 5 at the tip of the pipe handling device. This head 13 is shaped for the purpose of being able to move in the gap between the pairs of fingers of the fingerboard, and thereby with the help of the gripping and holding device 1' of the pipe support device 1, the fingerboard Overcoming the fixing effect of the bolts until it is possible to pull out the pipe from 5.

The head 13 is in the form of a concave portion 13' on one side and a wedge-shaped portion 13'' tapering on the rear side. The front side here refers to the end of the head 13 that first enters the gap 5''; Rear surface refers to the part that follows when moving inward into the head or fingerboard.

The corner of the outer edge 13'' of the concave portion 13', during the inward movement of the head already mentioned, hits the respective fixing bolt 7 or pair of fixing bolts, in other words two cooperating opposing bolts, and is fixed. It overcomes the torsion spring force exerted by the spring 11 against the shaft 8 of the bolt and compresses them inwardly.The pipe 2 is moved from the fingerboard in the position where the grasping and holding device 1' of the device 1 is located. As the head 13 moves outwardly, while maintaining the locking bolt, the securing bolt is deflected from the unlocked position with the aid of the wedge-shaped rear portion of the head, leaving the pipe unobstructed for removal.

〔Effect of the invention〕

According to one invention, the pipe support device itself is used to operate the locking mechanism on the fingerboard 5 so that the locking mechanism works automatically. It is clear that the advantages of the present invention, due to the arrangement of the device and the function thereof, particularly of the locking device and the locking head, result in substantial economic savings and a simpler and more reliable fingerboard locking mechanism. be.

[Brief explanation of drawings]

Figure 1 is a perspective view of a pipe support device schematically shown in conjunction with an excavation derrick, a platform deck and a so-called fingerboard; Figures 2a and 2b respectively show details of the fingerboard of Figure 1; Horizontal and 1
3 is a top view of a portion of the finger boat of FIG. 1, and FIG. 4 is a sectional view taken along line IV--IV of FIG. Since the left and right fingerboard fixing devices are the same, only the right half is shown in its entirety, and Figure 5 is a plan view of the fixing device according to Figure 4, or in other words, an enlarged detailed view of Figure 3. It is. 1......Pipe support device 1'...
・・・・・・Grasping and holding device 2・・・・・・・・・・・・Pipe 3・・・・・・・・・Excavation center 5・・・・・・・・・・・・・Fingerboard 5′・・
......Finger 5"-...Gap 7...Fixing bolt 8...
...Welding shaft 9.10--Bearing

Claims (3)

[Claims] (1) Used especially on drilling platforms, where the pipe striations (2) are held in an active position above the excavation center (3) and the pipe sections are gathered in a vertical position, similar to a bear at the top. The device is arranged for movement between storage positions held in place with the aid of a so-called fingerboard, the teeth or fingers (5') of which pass through the ends of which the pipes are accommodated in the fingerboard. defining on each side an opening groove (5'') in which the pipe (2) is inserted or removed, the fingerboard is provided with a fixing device to prevent the pipe (2) from coming apart; At the level of the fingerboard (5), the gaps (5'') between the fingers (5') of the fingerboard are accessible and the fixing device (7) is likewise accessible while the pipe (2) is removed from the fingerboard. ) A pipe support device characterized in that it has a head shaped to release the fixing action of the pipe support device. (2) The fixing device consists of a number of springs (1) and an independent vertical shaft and a rotatable fixing bolt (7) of limited length extending only over a part of the width of said gap (5''), The bolts are arranged in pairs to secure the pipe (2) in a given position such that the force of the spring prevents it from leaving its stored position by holding the fixing bolt (7) in a fixed position adjacent to the stop (2). 2. The pipe support device according to claim 1, wherein the fixing bolts are arranged so as to open the gap by the action of the pipe itself when the pipe enters the pipe. (3) The head (13) has a front concave end (13') and a rear tapered wedge-shaped part (13''), the outer edge (13'') of the concave end being in the fingerboard gap. The inward movement of the head in (5") contacts and deflects the fixing bolt, and the tapered wedge-shaped part (13") is directed outward of the head (13) for pipe removal. A pipe support device according to claim 1, characterized in that the fixing bolt is kept in an unaffected, deflected, unfixed position during movement to the pipe support device.