JPS6018793B2 - Pipe device for drilling work and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for removing valuable fluids such as oil or gas from drilling operations, such as drilling operations during drilling, or from wells formed by holes formed through pongee or gas-containing geological formations. This invention relates to a pipe device used to continuously produce .

The pipe system of the invention is utilized as a string through which electrical signals are transmitted.

This signal represents a value measured below the hole, for example the obliquity of the hole being drilled, which helps to optimize the drilling operation. Electrical signals are then transmitted to the surface by an electrical telemeter carried by the drill pipe apparatus and drill collar of the drill string. In oil recovery operations, the signals include data regarding the pressure within the well, which data is continuously recorded in order to obtain information regarding the behavior of the well. In this operation, signals are transmitted to the surface via a telemeter held in a pipe system of the production tube suspended in the well. Pipe systems utilized in pipe strings capable of transmitting electrical signals consist of pipe sections provided at both ends with mechanical coupling devices, such as pin tool joints and box tool joints.
An electrode is mounted near the coupling device and insulated from the metal body of the pipe device. The electrodes of adjacent pipe devices are brought into signal-transmitting relationship when two identical pipe devices are connected by a mechanical coupling device. The electrodes at each end of each pipe device are electrically connected by an insulated conductive cable passing through the pipe section of the device. To protect the insulated conductive cable, the cape runs within a metal conduit that extends through the piping system.

The metal conduit must be mechanically retained to the interior wall of the piping system in a manner that does not impede the passage of drilling fluid or wire tools. For example, if a pipe system of 9 skin length is bent with a constant curvature over its entire length (in this case the pipe system has an inner conduit of about 10 arcs, and is attached at both ends an internal conduit with an outer diameter of about 1 skin). ), when the curvature of the pipe reaches 4.46° per 9° (15° per 30°), the conduit, even if held straight, crosses the interior of the pipe to the opposite side of the inner pipe wall. comes into contact with the part. Curvatures of this magnitude are particularly common in offshore wells where multiple drilling operations are performed from a single platform. Furthermore, it is clear that smaller curvatures can cause the conduit to move away from adjacent walls, potentially entangling the strands passing through the pipe. An object of the present invention is to provide a pipe device comprising an electrical signal transmission device of the form described above, in which the conduit protecting the insulated conductor has a small stress concentration within the pipe device and is capable of passing a linear tool. It is an inexpensive and reliable method for installation within pipe equipment.

Yet another object of the invention is to provide a method for manufacturing a pipe arrangement in which said conduits are connected as a pipe arrangement in a manner that is inexpensive, reliable, and allows a liquid-tight passage of electrical conductors through the pipe arrangement. It is to provide.

The pipe device of the present invention is a helical conduit comprising a pipe section, a pinwheel joint and a box tool joint disposed at both ends of the pipe section, and a straight end section, the pipe having an outer diameter of a conduit formed in each tool joint and having dimensions such that the conduit is dimensioned to securely engage an inner wall of the pipe section when the conduit is placed within the pulp section; a sealing device disposed in each passageway to form a liquid-tight seal between the conduit and the passageway and to mechanically lock the conduit within the passageway; , and an electrode held to the tool joint via an isolation device and electrically coupled by an electrical conductor extending through the conduit and passageway in both tool joints.

The pipe device resin structure of the present invention is formed in a helical shape with a conductor-like end portion, a passage is formed in the end portion of the pipe device, and the end portion of the conduit is connected to a passage in the end portion of the pipe device. The conduit is mounted inside a pipe device such that the outer diameter of the helix is shaped to fit the inner wall of the pipe device, and the end of the conduit is kept liquid-tight (airtight). , the step of locking within the passage of the pipe device.

The invention will be explained in detail below with reference to the drawings showing embodiments thereof.

The pipe device (section) 1 shown in FIG. 1 consists of a pipe section 2 with a pin tool joint 3 and a box tool joint 4.

The tool joint is known as an X-hole tool joint, but has a reduced inner diameter. For example, 11.
6 for a 3 toga (4.5 inch) diameter drill string
．． An X-hole tool joint with a minimum diameter through hole 5 of 2.5 inches is utilized. The tool joint is
This holds electrodes for sending signals to the electrodes of the same pipe device as the pipe device 1 when the pipe devices are connected.

In the embodiment of FIG. 1, these electrodes are connected to the contact ring 6.
and 7, and these rings are attached to both ends of the pipe device 1 by an insulating material such as epoxy resin. Referring to FIG. 2 which shows a detail of the annular contact element 6, it is surrounded by an insulating material 8 which fills a groove 9 provided in the face of the sealing shoulder 10 of the pinwheel joint 3. When connecting the same pipe arrangement 1 by means of a tool joint, as shown in FIGS. 1 and 2, the contact elements and the insulating material are isolated from within or around the drill string by the metal-to-metal connection of the sealing shoulder.

Contact elements 6 and 7 are electrically connected by an electrical circuit through passages 11 and 12, conduit 13 and passages 14 and 15.

The circuit consists of a conductor 16 substantially disposed in the passageway 11, a conductor cable 17 disposed substantially in the conduit 13, and a conductor (not shown) disposed substantially in the passageway 15. The conductor cable 17 is electrically connected to two other conductors. The insulated conductor used in the pipe device of this invention can be selected from commercially available conductors.

It is preferred to have a relatively low capacitance between the wire and other conduits and a high resistance between the wire and the conduit (ground). The flexibility and diameter of insulated conductor 17 are selected so that it can slide relatively easily within conduit 13 during installation. Conduit 13 is connected to passageways 12, 1 formed in pin and box tool joints 3, 4, respectively.
4, two substantially straight parts 20, 21 and an intermediate part 22.

The intermediate section 22 is designed to be elastically supported against the inner wall of the pipe section 2. For this purpose, conduit 13
The middle part 22 of the pipe arrangement 1 is bent substantially helically, which causes the part of the pipe arrangement 1 to be bent when installed in the pipe arrangement.
It is elastically biased to expand to a diameter at least substantially equal to the inner diameter of the pipe section 2. Therefore, when the intermediate section of the conduit 13 is elastically deformed and installed in the pipe arrangement 1, , substantially all parts of this conduit become elastically pressed against the inner wall of the pipe device 1. In a pipe device consisting of about 9 skin lengths, the conduit 1
The straight sections 20, 21 of 3 have a length of approximately 30 to 60 skins, and the interturn distance or "lead" of the helix is approximately 90 to 150 skins, with 120 skins/turn being particularly suitable in this case. End portions 18, 19 of conduit 13 are secured to passageways 12 and 14, as illustrated in more detail in FIG.

The tool joints 3 and 4 are shaped such that the end portions 18 and 19 can be easily inserted into the passages 12 and 14, respectively. The diameter of the bore 5 of the tool joint is smaller than the inner diameter of the helical intermediate section 22 of the conduit 13. Any linear tool that passes through the tool joint can therefore also pass through the rest of the pipe system. FIG.
The state shown is that it is attached to 2.

End portion 18 carries a small flange member 23, which may be a split ring secured to conduit end portion 18 by any suitable method such as welding. The end of the conduit section 18 is threaded and retains a nut 24. By threading a nut 24 onto the threaded end of the section 18 of the conduit, the section 18 is drawn into the passageway 12 and simultaneously pulled through the sealing ring 25 to provide a sealing engagement to the conical shoulder formed in the passageway 12. will be combined. The other end of the conduit 13 is attached to the passage 14 of the box tool joint 4 (see Figure 1).
This is done in the same manner as described in connection with the attachment of the end of the conduit to the .

After the ends of the conduit 13 have been securely secured in place in the aforementioned conditions, an insulated conductive cable 17 is introduced into the conduit 13 via the passage 12 and connected to the tool joints 3 and 4, respectively.
It is attached to conductive wires provided in passages 11 and 15 provided in the. The method of connecting the conductor cable 17 to the conductor 16 provided in the passageway 11 will be described in detail below with reference to FIG. One end of the conductor of the insulated cable blue 6 is connected to a contact ring 6 provided at the sealing shoulder of the pin joint 3, and a big tail 26 is provided at the other end. This other end of the conductor is electrically connected to the conductor 27 of the cable 17 by means of a clip connector 28, with an insulating cap 29 being provided over the connection. The end of the passage 12 formed in the tool joint 3 is closed by a threaded sealing plug 30.

A small radial recess 31 forms the passage 1 of the tool joint 3
2, this forms a place for the end 26 of the conductive cable 16 when it is necessary to remove the conduit 13 from the pipe arrangement 1 when replacing the conduit due to wear or similar problems. In this case, between the conductors 16 and 17 (
Similarly, the connection between the electrical conductor 17 and the electrical conductor in the channel 15 provided in the box tool joint 4 is broken, and the end of the electrical conductor 16 is positioned in the radial recess 31. , the conduit 1 without disturbing the position of the conductor 16.
Nut 24 can be removed from end portion 18 of 3. This facilitates replacement of the cable 17 and/or the conduit 13, since the contact rings 6, 7 do not have to be removed from the tool joint. If the contact ring is to be removed, which is a difficult task as it is glued in place, the tool joint groove must be thoroughly cleaned before the insulating ring and contact ring are re-glued in place. This requires a long period of reattachment work. Usually an epoxy adhesive is used, which is difficult to remove without re-machining the groove. Since the wear is limited to the helical portion 22 of the conduit 13, almost all that has to be replaced is the conduit, which is a relatively simple task. The pipe device is therefore reusable and has the same lifespan as a normal drill string. As is clear, the invention is not only applicable to the particular annular contact elements 6 and 7 shown.

Other forms of contact elements or electrodes are also available, adapted to transmit electrical signals to contact elements or electrodes of the same pipe arrangement connected by connecting elements forming a pipe string. Furthermore, the invention is not limited to the use of the particular metal-to-metal seal ring 25 shown in FIG.

Any other form of sealing device can also be applied, such as a compression seal. In order to minimize the pressure drop through the tool joints of the pipe apparatus of the invention, the inlet angle 32 of the pin joint 3 and the outlet angle 33 of the box joint 4 are designed such that the pressure drop across the joint is minimized.

An inlet angle of 30° and an exit angle of 100 give good results.

An inlet angle of 200° and an outlet angle of 6° provides the lowest pressure drop, but is slightly more complex to manufacture.

The passages 12 and 14 intersect at a transition section extending between the passage 5 and the inner wall of the pipe section 2. The conduit helix is wound in a left-handed or counterclockwise direction to minimize pressure losses within the pipe bore and mechanical loads at the conduit anchoring points.

This is in the form of a right-handed or clockwise rotating drill string. The conduit 13 is installed into the pipe arrangement 1 during its manufacture or during the replacement of a worn conduit 13.

The conduit 13 is bent in a conventional manner to obtain a helical shape in its middle section.

The outer diameter of the helix is then larger than the inner diameter of the pipe 2 of the pipe arrangement 1. Conduit 13 further has end portions that fit into passageways 12 and 14. These pilgrimages are formed in the woven portion of the pipe device 1. Subsequently preformed conduit 1
3 is introduced into the interior of the pipe arrangement, the outer diameter of the middle section of the conduit being pressed against the inner wall of the pipe arrangement. After installing the conduit into the pipe arrangement, the end portions 18, 19 of the conduit are locked into the passages 12, 14, respectively. This is done in a special manner as shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the pipe device of the present invention, and FIG.
The figure is an enlarged view of portion D in FIG. 2...Pipe part, 3...Pin joint, 4...Box tool joint, 6,7
... Electrode, 11, 12, 14, 15 ... Passage, 13
... Conduit, 16, 17 ... Electrode, 20
, 21... linear end portion, 25... sealing device. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A pipe device used for drilling work, the pipe device having a pipe portion, a pin tool joint and a box tool joint arranged at both ends of the pulp portion, and the joint has a the inner diameter is smaller than the pipe section, and the conduit is helical with a straight end section, the outer diameter of the helix dimension being such that the conduit is snug against the inner wall of the pipe section when placed within the pipe section. having a passageway formed in each of the tool joints dimensioned to engage, the ends of the conduit being formed to align with the passageway, and a liquid-tight seal between the ends of the conduit and the passageway; and further having a sealing device disposed in each of the passageways to physically lock the conduit within the passageway, and an electrode supported by a tool joint through the intermediary of the insulating device. has
A pipe arrangement, characterized in that the electrodes in the tool joints at both ends are electrically connected by an electrical conduit extending through the passageway and the conduit. 2. The pipe device according to claim 1, wherein the inner diameter of the tool joint is smaller than the inner diameter of the spiral portion. 3. Both tool joints include a transition portion for connecting their inner diameter to the inner diameter of the pulp section, and the transition angles of the cross-sections of the pin joint and box joint are 30° and 10°, respectively. A pipe device according to claim 1 or 2. 4. A patent characterized in that both said tool joints include a transition part for connecting their inner diameter to the inner diameter of said pipe section, the passages of said tool joints intersecting inside said transition part. A pipe device according to claim 1 or 2. 5. The sealing device for each passageway includes a shoulder formed in the passageway, a ring disposed at the associated end of the conduit, a seal disposed between the shoulder and the ring, and a seal disposed between the shoulder formed in the passageway and the associated end of the conduit; 5. A pipe arrangement according to any one of claims 1 to 4, characterized in that it comprises a drawing device for drawing the conduit into the passage so as to compress it into a sealing position. 6. The insulated conductor includes two insulated wires attached to the electrodes of each tool joint, a continuous insulated conductor extending through the conduit, and an end of the wire connected to an end of the continuous conductor. The pipe device according to claim 1, characterized in that the pipe device is connected to the pipe device. 7. The passageway of each tool joint has a recess for storing the end of the associated electrical wire when the conduit is installed in the pipe arrangement. The pipe device described in. 8 A pipe device used for drilling work, which has a pipe section, a pin tool joint and a box tool joint arranged at both ends of the pipe section, and the joint has an inner diameter larger than that of the pipe section. small and the conduit is helically shaped with a straight end portion, the outer diameter of the helix being dimensioned such that the conduit tightly engages the inner wall of the pipe section within which the conduit is disposed. , a passageway formed in each of the tool joints, the ends of the conduit being formed to align with the passageway, forming a liquid-tight seal between the ends of the conduit and the passageway, and further forming a passageway. a sealing device disposed in each of the passageways to physically lock the conduit within the passageway, and an electrode carried by a tool joint through the intermediary of the insulating device, with a A method of manufacturing a pipe device wherein the electrodes within a tool joint are in electrical communication with a passageway and an electrical conduit extending through the conduit, forming the conduit in a helical configuration having a straight end portion. forming a passageway in an end portion of said pipe arrangement; forming an end portion of said conduit to fit said passageway in said end portion of said pipe arrangement; attaching the conduit to the interior of the pipe device so as to tightly engage the inner wall of the pipe device; and locking an end portion of the conduit in a passageway of the pipe device in a liquid-tight manner. A method for manufacturing a pipe device.