JPH04505581A - Method for manufacturing formed pipes used in well structures and equipment for carrying out this method - 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] Method for manufacturing formed pipes used in well construction and equipment for carrying out this method Technical field TECHNICAL FIELD This invention relates to the processing of metals by the application of pressure, and more particularly to the processing of metals by the application of pressure. Method of manufacturing formed pipes of the type used in construction and carrying out this method The present invention relates to a device that can perform the following functions.

The present invention is useful for temporarily repairing difficult areas in well drilling. It can be most effectively used in the production of molded pipes used in

Conventional technology During the drilling of deep wells, some of the exposed rock layers absorb drilling mud to an extreme extent. It frequently happens that the fluid in the hole releases its own layer of fluid. This kind of layer The desired result is not achieved when isolated by known cementing techniques. There will be fewer things that aren't there. The method currently used in this case is to or other intermediate pipe strings - complete (i.e. starting from the well head) or abbreviated -. Ru.

However, repair equipment does not guarantee adequate fluid tightness to isolate troublesome areas. These repair devices cannot be applied in a wide range of fields, and furthermore, these repair devices are relatively It cannot be made to a large length, so its range extends to tens or hundreds of meters. It is not suitable for isolating troublesome areas with high efficiency.

full or shortened intermediate pipes) IJ rings when used for this purpose , this troublesome area will be reliably repaired. However, the operations involved are Consolidation of concrete into the well and excessive investment of metal, cement and time. It requires significant costs to purchase. In addition, each provided in the well Due to the new intermediate sl-ring, the diameter of the well is reduced, which improves production conditions. be disadvantageous.

The operation of forming the central section of a cylindrical pipe by drawing it through a forming device A method for producing molded pipes is known (USSR Patent No. 549196).

A device capable of carrying out this method consists of elastic rods interconnected by rings. A puller comprising a sleeve having a forming mold consisting of segmented forming elements mounted on the rod. It comprises a cutting die and a unit for applying an external load to the forming die. These bullets at a distance from the end face of the mold not less than two lengths of the forming elements of the mold; interconnected.

The main drawback of the above-mentioned known method and the equipment for carrying out this method is that the pipe before its formation The stock (material) has an outside diameter equal to the diameter of the poling hole or well in that troublesome area. This prevents the produced formed pipe from entering the well and It tightly engages the wall of the polling hole and is not installed in a troublesome area.

However, when the pipe was formed by the prior art method described above, the pipe The cylindrical ends of the pipe have a reduced diameter only over the central forming part of the It retains its original diameter and therefore cannot penetrate into the well. pipe diameter If is further reduced, the pipe wall can engage with the wall of the polling hole. This means that this pipe will not be installed correctly in sensitive areas of the well. . The above disadvantages are that polling in troublesome areas does not reduce the fluid passage of the well. Even more so when troublesome areas are repaired by extending the hole diameter beyond the well diameter. It becomes noticeable.

Another drawback of this known method and the device implementing it is that it makes it difficult to produce shaped pipes. Needless to say, it is complicated, expensive, and reduces productivity. The production process of formed pipes with two cylindrical ends is carried out in successive stages. It is.

It is further known how to produce formed pipes by drawing them through forming equipment. (A, 5hurupov, M, A, Freiberg.

"Proizvodstvo truboekenomichnykh pro filey”/Economical production of formed pipes/, Gosudarstvennoy e nauchno-tekhnicheskoyeizclatel'-5t vo po chernoi i tsvetnoi metalurgii /5verd Iovsk/, p. 146). According to this method, the location of the pipe The desired shape remains the same throughout its length.

The disadvantage of this technology is that the pipe produced by the above method has its ends welded together is joined into the string by It would be extremely complicated. Furthermore, entry into the well and installation requires special Use of complex equipment such as construction collet heads and burnishing (extension) heads It requires

The purpose of this invention is to repair troublesome areas of a well without reducing the fluid passageway of the well. To create a method of manufacturing pipes with cylindrical ends that are suitable for Ru.

Another object of the invention is to simplify the manufacturing technique of formed pipes and reduce their costs. That is.

Another object of the invention is to improve the productivity of formed pipe manufacturing.

The principal object of the invention is to provide a diameter substantially equal to the diameter of the circumscribed circle of the formed portion of the pipe. A well construction capable of producing formed pipes with cylindrical sections having large diameters. to create a method for manufacturing formed pipes used in construction and equipment for carrying out this method. Is Rukoto.

Disclosure of invention The above purpose is to construct a well by drawing a cylindrical pipe through a forming device. A method for manufacturing formed pipes used in The shape is carried out over part of its length and this method reduces the diameter of the cylindrical part of the pipe By making the diameter substantially equal to the diameter of the circumscribed circle of the formed section of the pipe, A method of manufacturing formed pipe that involves reducing the pipe over its entire length. and be achieved.

The formed part and cylindrical part of the formed pipe manufactured by the above method are all cut. Due to the substantially equal surface dimensions, the sl-IJ song rows of these formed pipes are ) can enter troublesome areas of the well without obstruction, thereby increasing the hole enlargement. Ensure that this area is repaired after large or expanded areas to ensure tight engagement with the walls of the polling hole. I'm going to growl.

It is further an object of the invention that the pull-out mold housed in the housing be mounted thereon. Method of manufacturing a formed pipe with a drawn-off stand and a drawn-off carriage In an apparatus capable of performing It is equipped with cams located in front of the pull-out type on both sides of the running path of the pipe, and these cams are has a deformation roller attached to one end and a portion attached to the other end. a branching lever, the branching lever receiving a cooperating lock bin therein; is operatively connected to the pull-out carriage via a connecting rod having a groove that further A pressurized tube mounted on the housing parallel to the running path of the pipe being manufactured. A pivoting lever having a roller is provided, one arm of the pivoting lever is connected to a pressure roller. The other arm engages the pipe made through the cam, and the other arm engages with the cam periodically. This is accomplished by means of a device carrying pivoting stops adapted to cooperate. Ru.

The disclosed structure of this device allows the forming device to be retracted after forming its central portion. cylindrical end This method simplifies, speeds up and makes the process of making formed pipes with Continuing and automating processes, simplifying the work of operators and improving overall productivity. I can do it.

In a preferred embodiment thereof, the device of the invention further comprises a common shaft with the cam. A disc mounted on the top and one arm of the disc rotate above the housing. The other arm is rotatably connected to these discs. a double arm lever, the discs being operatively connected to the cam, A heavy arm lever is operatively connected to the stop.

The construction of this device reduces the load on the stopper and therefore increases the service life of the stopper. It will extend your life.

Drawing summary Other objects and advantages of the invention are described with reference to the accompanying drawings. It will become clear from the description below.

here FIG. 1 is a schematic part of an apparatus for carrying out the method of manufacturing a formed pipe according to the present invention. cross section, Figure 2 is a plan view of the device in Figure 1; 3 is a plan view of the cam of the device shown in FIG. 1, FIG. 4 is a side view of the cam of FIG. 3, Fig. 5 is a plan view of the disk of the device shown in Fig. 1, and Fig. 6 is a side view of the disk of Fig. 5. , Figure 7 shows the double ring with disc and cam in its initial position before forming the pipe. 8 is a schematic diagram of the mechanism shown in FIG. 7 in the operating position, and FIG. 9 is a schematic diagram of the mechanism shown in FIG. A schematic diagram of the mechanism in Figure 8 at the final stage of pipe forming action; FIG. 10 is a schematic diagram of the relative positions of the arms of the double link articulation mechanism.

Preferred implementation The method of manufacturing a formed pipe disclosed herein includes the following main steps: Ru.

A cylindrical pipe stock (stock) is drawn through a forming device, which forms the pipe. The central section is shaped and this pipe is reduced throughout its length, reducing the the cylindrical end section is reduced substantially to the diameter of the circumscribed circle of the shaped section of the pipe; The end of the pipe is then threaded to connect the formed pipe into the string. match.

Where it is appropriate to join certain sections of formed pipe by welding, one end Only a portion remains cylindrical in forming this pipe. cylinder of pipe material The action of reducing the shaped end may be performed either before or after the forming action.

The device for carrying out this method consists of a housing 1 on which a drawing die 2 is attached, and a spout. It is biased by a ring 3 and is mounted vertically in the housing 1 and has a sprue at its end. The shaft 4 has a line (not shown) cut. cylindrical The lower ends of these shafts 4 on both sides of the running path of the pipe material 5 are for deformation or formation. A cam 6 having a roller 7 for use is attached, and the upper end of the shaft 4 is connected to each branched lever. 8, these branching levers 8 are connected to the shaft of a withdrawal carriage (not shown). Each rod is rotatably mounted in the groove 10 of the connecting rod 11 mounted on the foot 12. It is attached so as to engage with the cubin 9.

The deformation roller 7 is mounted on the shaft 13 in the groove 4 (Fig. 4) of each cam 6. attached and by the overhang 15 (FIG. 5) on the protruding end of the disc 16. and the disc 16 is held in its operating position by the cylindrical projection 17 (the fourth (Fig. 3) is mounted so as to rotate on the abutment surface 18 (Fig. 3) and its play. At this point, the thrust surface 19 (FIG. 6) of the disk 16 is engaged with the abutment surface 20 of each cam 6. I try to match it. The angle of rotation of the disc 16 is limited by the pivots 24 and 25. The two arms or ribs are rotatably connected to the housing 1 and each disk 16. A double arm lever 21 consisting of links 22 and 23 (Figs. 1, 2 and 8) brought to you. Links 22 and 23 reciprocate vertically to housing 1 A rod type having a tapered surface 27 (FIG. 1) at its lower end, mounted as shown in FIG. The rotation is suppressed by the stopper 26 . These stoppers 26 are shackle Its central part is attached to the housing 1 by a pivot 30 via 28 The pivot lever 29 has an upper portion rotatably connected to one end of the pivot lever 29. The other end of the bar 29 carries a pressure roller 31. Lever 29 is this device is rotatable relative to the housing 1 in a plane parallel to the longitudinal axis of the The length of that arm on the side of the roller 31 corresponds to the cylindrical shape of the pipe 5 that engages with the suppression roller 31. Define the length of the rear end portion. This device consists of a thrust ring 33 and a bolt 34 (first ) is fixed in advance to a mounting base 32 of a pull-out base (not shown). The most In the initial position, the end of the pivot lever 29 with the stop 26 is raised and the stop The acting force of the puller 3 spreads the deformation roller 7.

The device operates as follows.

The cylindrical pipe blank 5 to be formed is introduced into the drawing die 2, while the pipe The front end of the material is pre-aligned (completely (by reduction). Pressure roller 3 due to engagement with pipe material 5 1 is raised as shown in FIG. The other end of the arm 29 contacts the tapered end 27 of each stopper 26. It will be lowered like this. The action of the spring 3 (Fig. 1) causes the deformation roller 7 to move as shown in Figs. Spread and separate as shown in Figure 7.

A pull-out carriage (not shown) is then moved toward the device to remove the pipe. of the connecting rod 11 which engages the prepared front edge of the blank 5 and attaches the locking pin 9. Cylindrical front end portion 5 of the pipe 5 whose front portion passes through each branching lever 8 and is to be formed protrudes from the lever 8 over a predetermined length defining the length '. Pull-out cap The subsequent actuation stroke of the ridge (not shown) causes the pipe blank 5 to move as shown in FIG. By pulling in the direction of arrow A, the cylindrical front end portion 5' of the pipe material 5 passes through the drawing die 2. and then reduced to the desired diameter. The predetermined length of the cylindrical front end portion 5' of the pipe material 50 is After being contracted, the locking pin 9 of the connecting rod 11 engages with each branch lever 8 and pulls it. The direction is changed in the pulling direction, and the branching lever 8 similarly moves the cam 6 and the deformation roller 7. and invert each shaft 4. Therefore, the deformation roller 7 is in contact with the cam 6. The contact surface 18 (FIG. 3) is engaged with the protrusion 15 (FIG. 5) of each disk 16. is forced into the surface of the pipe material 5 to deform it within the limits defined by and.

This engagement ensures that any rotation of the disc 16 in this position is prevented by each stop 26. Since the rotation (relative to the material 5) is prevented by the restrained link 23, the deformation roller While holding the roller 7 (FIG. 8) in its operating position, taper one end 27 ( (FIG. 1) is therefore subjected to a significantly lighter load than the forming force. deformation bifurcated with its shaft 4 over an angle defining the required operating position of the roller 7; As the lever 8 is rotated, the branching lever 8 locks each lock pin 9 of the connecting rod 11. be removed from The subsequent movement of the pipe material 5 is performed by moving the pipe 5 using the drawing die 2. resulting in simultaneous shaping and reduction of the central section, thereby forming the shaped central part of the pipe 5. The diameter of the circumscribed circle of the section is equal to the diameter of its cylindrical reduced end section 5'.

The rear end edge of the pipe material 5 overlaps the lower side of the pressure roller 31, so the pressure roller 31 It falls under its own weight, detaches the stopper 26 from each link 23, and The hook 23 rotates on a pivot 25 so as to separate from the pipe material 5 (Fig. 9), and each The cam 6, which is operatively connected to the link 22 via the disc 16, rotates in the withdrawal direction. The forming roller 7 is thereby retracted from the pipe blank 5. pipe material The unformed cylindrical rear end portion of No. 5 passes through the drawing mold 2 and is reduced. The diameter of the cylindrical front end portion 5' is substantially reduced (FIG. 1). spring 3 returns the cam 6 together with the roller 7 to the initial position (FIG. 7).

This completes the forming process of the pipe blank 5 combined with the shrinking process.

Industrial applicability This invention is useful for repairing troublesome areas in well drilling and well casing repair. It can be used to manufacture molded pipes used in

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Claims (3)

[Claims] 1. Used in well construction, including the action of drawing a cylindrical pipe through a forming device. In a method of manufacturing a molded pipe of a type, Each pipe is shaped over a portion of its length, and over its entire length. Reduce the pipe so that the diameter of the cylindrical part of the pipe is the circumcircle of the formed part of the pipe. of a shaped pipe, characterized in that the formed pipe is substantially equal in diameter to Production method. 2. Apparatus for carrying out the method according to claim 1, the apparatus being housed in a housing (1). It is equipped with a pull-out stand and a pull-out carriage to which a pull-out die (2) is attached. In the equipment for producing a cam (6) located in front of the (2), the cam (6) being attached to one end of the cam (6); a deforming roller (7) and a branching lever (8) attached to the other end; The branching lever (8) receives a locking pin (9) that cooperates with the branching lever (8). The pull-out carriage is actuated via a connecting rod (11) provided with a groove (10) for The housing is parallel to the running path of the pipe (5) which is also being manufactured. a pivoting lever (29) with a suppression roller (31) mounted on the ring (1); one arm of the pivot lever (29) is provided with a pressure roller (31); The other arm engages with the manufactured pipe (5) and the other arm engages with the cam (6). It is characterized by carrying a pivot stopper (26) adapted to cooperate with the Manufacturing equipment for molded pipes. 3. Device according to claim 2, mounted on a common shaft with a cam (6). one disc (16) rotatably connected to the housing (1); The other arm (22) is rotatably connected to the arm (23) and the disk (16). ), and the disc (16) has a cam ( 6), and the double arm lever (21) is operatively connected to the stopper (26). Apparatus characterized in that they are operatively connected.