Pressure-bearing sealing connection device of intelligent drill rod communication cable

Abstract

The invention discloses an intelligent drill rod communication cable pressure-bearing sealing connection device, which comprises a first assembly and a second assembly, and is characterized in that the first assembly comprises a magnetic core seat part, a pressure-bearing sealing cylinder base and a conical head pressure-bearing sealing cylinder, and the second assembly comprises a large-taper single-needle connector, a transition pipe, a double-end male needle connector, a flat head pressure-bearing sealing cylinder and a positioning pipe; the first section of communication line is inserted into one end of the conical head pressure-bearing sealing cylinder, the second section of communication line is respectively inserted into one end of the double-end male pin connector and the large-taper single-pin connector, and the other end of the double-end male pin connector is connected with the third section of communication line introduced from the flat head pressure-bearing sealing cylinder; the large-taper single-needle connector can be inserted into the conical head pressure-bearing sealing cylinder so as to achieve pressure-bearing sealing connection of the first assembly and the second assembly. The problem of sealing connection of communication lines is solved, and permeation and erosion of high-pressure and high-temperature drilling fluid are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of oil drilling equipment communications, and in particular to a pressure-bearing sealing connection device for an intelligent drill pipe communication cable. Background Art

[0002] As the most important fossil energy, oil occupies an important position in the world's energy consumption structure and is an essential material to support industry, economy and daily life. Among them, the exploration and exploitation of oil resources is particularly important.

[0003] During the oil exploration and production process, operators often find it difficult to accurately obtain the status of downhole drill tools and geological information, making it impossible to effectively control and adjust the drilling process, which may lead to damage to the drill tools or position deviations. The smart drill pipe is a downhole tool that integrates sensing, communication, and control functions. Through real-time data acquisition and analysis, it realizes the digitization, automation, and intelligence of the drilling process, and can transmit downhole information at high speed. The core of the smart drill pipe lies in the two-way information communication between the wellbore and the wellbore. Among them, magnetic coupling communication transmission is a high-speed communication method for smart drill pipe systems. The information transmission between the drill pipes is realized through the electromagnetic coupling effect of the magnetic coupler between the drill pipe joints. The magnetic coupler at one end of the drill pipe joint is connected to the magnetic coupler at the other end of the drill pipe joint by a communication line for signal transmission. The sealed connection of the communication line is particularly important to avoid the penetration and erosion of high-pressure and high-temperature drilling fluids.

[0004] At present, relevant research work in China mainly focuses on sealing connections under conventional pressure, and there is relatively little research on high-pressure sealing effects. The communication line connection methods used are mostly pipe thread sealing connections or O-ring sealing connections. Repeated operations cause deformation of pipe threads and damage to O-rings, which greatly reduces the pressure-bearing sealing effect.

[0005] Therefore, there is an urgent need for a pressure-bearing sealing connection device for intelligent drill pipe communication cables. Summary of the Invention

[0006] The present invention provides a pressure-sealed connection device for an intelligent drill pipe communication cable, which solves the problem that repeated operations of traditional communication cables cause deformation of pipe threads and damage to O-rings, thereby greatly reducing the pressure-sealing effect.

[0007] The present invention provides a pressure-sealed connection device for an intelligent drill pipe communication cable, comprising a first component and a second component, wherein the first component comprises a magnetic core seat component, a pressure-sealed cylinder base, and a tapered pressure-sealed cylinder; and the second component comprises a large-taper single-pin connector, a transition tube, a double-ended male pin connector, a flat-head pressure-sealed cylinder, and a positioning tube.

[0008] Wherein, the magnetic core seat component is connected to one end of the pressure-bearing sealing cylinder base through a thread, and the other end of the pressure-bearing sealing cylinder base is installed in the cone head pressure-bearing sealing cylinder;

[0009] One end of the large-taper single-pin connector is connected to one end of the transition pipe by a thread, the other end of the transition pipe is installed in the double-ended male pin connector, and the transition pipe is connected to the positioning pipe by a thread, the flat-head pressure-bearing sealing cylinder is installed in the positioning pipe, the positioning pipe is positioned by the second shoulder in the drill pipe joint, and the flat-head pressure-bearing sealing cylinder is engaged with the double-ended male pin connector to achieve sealing;

[0010] The first section of the communication line led out through the magnetic core seat component is inserted into one end of the cone head pressure-bearing sealing cylinder, the end of the large-taper single-pin connector is provided with a first single-pin terminal, and the two ends of the double-ended male pin connector are respectively provided with a second single-pin terminal and a third single-pin terminal, the two ends of the second section of the communication line are respectively connected to the first single-pin terminal and the second single-pin terminal, and the third single-pin terminal is connected to the third section of the communication line introduced from the flat head pressure-bearing sealing cylinder;

[0011] The cone-head pressure-bearing sealing cylinder, the large-taper single-pin connector, the double-end male pin connector and the flat-head pressure-bearing sealing cylinder all include a conductive layer and an insulating layer, and the insulating layer covers the conductive layer;

[0012] The large-taper single-pin connector is engaged with the cone head pressure-bearing sealing cylinder to achieve sealing, so as to realize the pressure-bearing and sealed connection between the first component and the second component.

[0013] The pressure-bearing sealing connection device of the intelligent drill pipe communication cable is preferably provided with a connecting convex ring on the large-taper single-pin connector, and a connecting groove is provided in the cone head pressure-bearing sealing cylinder. The large-taper single-pin connector and the cone head pressure-bearing sealing cylinder are sealed by the engagement of the connecting convex ring and the connecting groove.

[0014] The pressure-bearing sealing connection device of the intelligent drill pipe communication cable is preferably provided with a groove on the flat-head pressure-bearing sealing cylinder, and the double-ended male pin connector is provided with a convex ring. The flat-head pressure-bearing sealing cylinder and the double-ended male pin connector are sealed by the engagement of the convex ring and the groove therebetween.

[0015] The pressure-bearing sealing connection device of the intelligent drill pipe communication cable, preferably, the magnetic core seat component includes a magnetic core seat and a magnetic core seat threaded tube, the magnetic core seat is arranged on the end face of the drill pipe joint, the magnetic core seat, the magnetic core seat threaded tube and the pressure-bearing sealing tube base are connected in sequence by threads, and the first section of the communication line is led out from the magnetic core seat and inserted into one end of the cone head pressure-bearing sealing tube.

[0016] The pressure-bearing sealing connection device of the intelligent drill pipe communication cable is preferably provided with a first shoulder in the base of the pressure-bearing sealing cylinder, and the first shoulder positions the cone head pressure-bearing sealing cylinder.

[0017] The pressure-bearing sealing connection device of the intelligent drill pipe communication cable is preferably provided with a first O-ring between the large-taper single-pin connector and the transition pipe.

[0018] The pressure-bearing sealing connection device of the intelligent drill pipe communication cable is preferably provided with a second O-ring between the transition pipe and the double-ended male pin connector.

[0019] The beneficial effects are:

[0020] The present invention adopts the coordinated use of a tapered head pressure-bearing sealing cylinder with a large-tapered single-pin connector, a double-ended male pin connector and a flat-head pressure-bearing sealing cylinder, and O-rings are respectively provided between the large-tapered single-pin connector and the transition pipe, and between the transition pipe and the double-ended male pin connector, thereby realizing a pressure-bearing and sealed connection of the communication line. The double-ended male pin connector and the flat-head pressure-bearing sealing cylinder are used in combination and can withstand a maximum pressure of 20,000 psi. They will not be damaged in the case of repeated plugging and unplugging operations, thereby solving the sealing connection problem of the communication line and avoiding the penetration and erosion of high-pressure and high-temperature drilling fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a structural diagram of a flat-head pressure-bearing sealing cylinder;

[0023] Figure 3 This is a structural diagram of the cone head pressure-bearing sealing cylinder.

[0024] In the picture:

[0025] 1. Threaded tube of magnetic core seat; 2. Base of pressure-bearing sealing cylinder; 3. Cone-shaped pressure-bearing sealing cylinder;

[0026] 4. Large-taper single-pin connector; 5. Transition tube; 6. Double-ended male pin connector;

[0027] 7. Flat-head pressure-bearing sealing cylinder; 8. Positioning tube; 9. Magnetic core seat; 10. Drill pipe joint;

[0028] 11. The first section of the communication line; 12. The second section of the communication line; 13. The third section of the communication line;

[0029] 14. First shoulder; 15. Second shoulder; 16. First O-ring; 17. Second O-ring;

[0030] 18. Insert into groove; 19. Groove. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "one end" and "the other end" and other designations, such as orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the systems or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the use of terms such as "first," "second," and "third" to define components is intended solely to facilitate distinction between such components. Unless otherwise stated, these terms have no special meanings and should not be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] The present invention provides a pressure-bearing sealing connection device for an intelligent drill pipe communication cable, comprising a first component and a second component, wherein the first component comprises a magnetic core seat component, a pressure-bearing sealing cylinder base and a cone-head pressure-bearing sealing cylinder, and the second component comprises a large-taper single-pin connector, a transition tube, a double-ended male pin connector, a flat-head pressure-bearing sealing cylinder and a positioning tube; wherein the magnetic core seat component is connected to one end of the pressure-bearing sealing cylinder base through a threaded connection, and the other end of the pressure-bearing sealing cylinder base is installed in the cone-head pressure-bearing sealing cylinder; one end of the large-taper single-pin connector is connected to one end of the transition tube through a threaded connection, and the other end of the transition tube is installed in the double-ended male pin connector, and the transition tube is connected to the positioning tube through a threaded connection, and the flat-head pressure-bearing sealing cylinder is installed in the positioning tube. The positioning tube is positioned by the second shoulder in the drill pipe joint, and the flat-head pressure-bearing sealing cylinder is engaged with the double-ended male pin connector to achieve sealing; the first section of the communication line led out through the magnetic core seat component is inserted into one end of the cone-head pressure-bearing sealing cylinder, the end of the large-taper single-pin connector is provided with a first single-pin terminal, and the two ends of the double-ended male pin connector are respectively provided with a second single-pin terminal and a third single-pin terminal, the two ends of the second section of the communication line are respectively connected to the first single-pin terminal and the second single-pin terminal, and the third single-pin terminal is connected to the third section of the communication line introduced from the flat-head pressure-bearing sealing cylinder; the large-taper single-pin connector can be inserted into the cone-head pressure-bearing sealing cylinder to achieve a pressure-bearing sealing connection between the first component and the second component. The pressure-bearing sealing connection device of the intelligent drill pipe communication cable is preferably provided with a groove on the flat-head pressure-bearing sealing cylinder, and the double-ended male pin connector is provided with a convex ring, and the flat-head pressure-bearing sealing cylinder and the double-ended male pin connector are sealed by engaging the convex ring and the groove between the two. The present invention adopts the coordinated use of a tapered head pressure-bearing sealing cylinder with a large-tapered single-pin connector, a double-ended male pin connector and a flat-head pressure-bearing sealing cylinder, and O-rings are respectively provided between the large-tapered single-pin connector and the transition tube, and between the transition tube and the double-ended male pin connector, thereby realizing a pressure-bearing sealed connection of the communication line.

[0035] The entire technical process is described in detail below using a pressure-sealed connection device for an intelligent drill pipe communication cable as an example.

[0036] Example 1

[0037] like Figure 1 、 Figure 2 and Figure 3 As shown, a pressure-sealed connection device for an intelligent drill pipe communication cable includes a first component and a second component. The first component includes a magnetic core seat component, a pressure-sealed cylinder base 2, and a tapered pressure-sealed cylinder 3. The second component includes a large-taper single-pin connector 4, a transition tube 5, a double-ended male pin connector 6, a flat-head pressure-sealed cylinder 7, and a positioning tube 8.

[0038] The core seat component is connected to one end of the pressure-bearing sealing cylinder base 2 through a threaded connection, and the other end of the pressure-bearing sealing cylinder base 2 is installed into the cone head pressure-bearing sealing cylinder 3;

[0039] One end of the large-taper single-pin connector is connected to one end of the transition tube 5 by a thread, the other end of the transition tube 5 is installed in the double-ended male pin connector 6, and the transition tube 5 is connected to the positioning tube 8 by a thread, the flat-head pressure-bearing sealing cylinder 7 is installed in the positioning tube 8, and the positioning tube 8 is positioned by the second shoulder 15 in the drill pipe joint 10. The flat-head pressure-bearing sealing cylinder 7 is provided with a groove, and the double-ended male pin connector 6 is provided with a convex ring. The flat-head pressure-bearing sealing cylinder 7 and the double-ended male pin connector 6 are sealed by the convex ring and the groove 19 between the two.

[0040] The first section of the communication line 11 led out through the magnetic core seat component is inserted into one end of the cone head pressure-bearing sealing cylinder 3. The end of the large-taper single-pin connector is provided with a first single-pin terminal, and the two ends of the double-ended male pin connector 6 are respectively provided with a second single-pin terminal and a third single-pin terminal. The two ends of the second section of the communication line 12 are respectively connected to the first single-pin terminal and the second single-pin terminal, and the third single-pin terminal is connected to the third section of the communication line 13;

[0041] The large-taper single-pin connector 4 can be inserted into the cone-head pressure-bearing sealing cylinder 3 to achieve a pressure-bearing and sealing connection between the first component and the second component.

[0042] The cone-head pressure-bearing sealing cylinder 3, the large-taper single-pin connector 4, the double-end male pin connector 6, and the flat-head pressure-bearing sealing cylinder 7 all include a conductive layer and an insulating layer, wherein the insulating layer covers the conductive layer;

[0043] The large-taper single-pin connector 4 is engaged with the cone-head pressure-bearing sealing cylinder 3 to achieve sealing, thereby realizing a pressure-bearing and sealed connection between the first component and the second component.

[0044] Among them, a connecting convex ring is provided on the large-taper single-pin connector 4, and a connecting groove 18 is provided in the cone head pressure-bearing sealing cylinder 3. The large-taper single-pin connector 4 and the cone head pressure-bearing sealing cylinder 3 are sealed by the engagement of the connecting convex ring and the connecting groove 18.

[0045] The core seat component includes a core seat 9 and a core seat threaded tube 1. The core seat 9 is arranged on the end face of the drill pipe joint 10. The core seat 9, the core seat threaded tube 1 and the pressure-bearing sealing tube base 2 are connected in sequence through threads. The first section of the communication line 11 is led out from the core seat 9 and inserted into one end of the cone head pressure-bearing sealing tube 3.

[0046] A first shoulder 14 is provided in the pressure-bearing sealing cylinder base 2 , and the first shoulder 14 positions the cone-head pressure-bearing sealing cylinder 3 .

[0047] A first O-ring 16 is provided between the large-taper single-needle connector 4 and the transition pipe 5 .

[0048] A second O-ring 17 is provided between the transition pipe 5 and the double-ended male needle connector 6 .

[0049] Example 2

[0050] The method for using the pressure-sealed connection device of the intelligent drill pipe communication cable in Example 1 comprises the following steps:

[0051] S1: Install the second O-ring 17 on the double-ended male pin connector 6;

[0052] S2: The third section of the communication line 13 passes through the positioning tube 8 and the flat-head pressure-bearing sealing cylinder 7;

[0053] S3: One end of the second communication line 12 is connected to the second single-pin terminal at one end of the double-ended male pin connector 6;

[0054] S4: The double-ended male pin connector 6 is connected to the flat-head pressure-bearing sealing cylinder 7;

[0055] S5: The third single-pin terminal at the other end of the double-ended male pin connector 6 is connected to the third communication line 13;

[0056] S6: Install the first O-ring 16 on the large-taper single-pin connector 4;

[0057] S7: The other end of the second communication line 12 is connected to the first single-pin terminal of the large-taper single-pin connector 4;

[0058] S8: The transition pipe 5 is connected to the positioning pipe 8 by threads;

[0059] S9: The transition tube 5 is connected to the large-taper single-pin connector 4 through threads;

[0060] S10: Push the second assembly consisting of the large-taper single-pin connector 4, transition tube 5, double-ended male pin connector 6, flat-head pressure-bearing sealing cylinder 7, and positioning tube 8 to the shoulder of the drill pipe joint hole for positioning;

[0061] S11: One end of the core seat threaded tube 1 is connected to the core seat 9 on the end face of the drill pipe joint 10 through a threaded connection;

[0062] S12: The other end of the core seat threaded tube 1 is connected to one end of the pressure-bearing sealing cylinder base 2 through a threaded connection;

[0063] S13: The first section of the communication line 11 led out from the magnetic core seat 9 is inserted into the cone head pressure-bearing sealing cylinder 3;

[0064] S14: The pressure-bearing sealing cylinder base 2 is installed into the cone-head pressure-bearing sealing cylinder 3, and the first shoulder 14 in the hole of the pressure-bearing sealing cylinder base 2 positions the cone-head pressure-bearing sealing cylinder 3;

[0065] S15: Insert the first integrated component of the magnetic core seat 9, the magnetic core seat threaded tube 1, the pressure-bearing sealing cylinder base 2, and the cone head pressure-bearing sealing cylinder 3 until the cone head pressure-bearing sealing cylinder 3 and the large-taper single-pin connector 4 are connected.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pressure-sealed connection device for an intelligent drill pipe communication cable, characterized in that: The device comprises a first component and a second component, wherein the first component comprises a magnetic core seat component, a pressure-bearing sealing cylinder base and a cone-head pressure-bearing sealing cylinder, and the second component comprises a large-taper single-pin connector, a transition tube, a double-end male pin connector, a flat-head pressure-bearing sealing cylinder and a positioning tube; Wherein, the magnetic core seat component is connected to one end of the pressure-bearing sealing cylinder base through a thread, and the other end of the pressure-bearing sealing cylinder base is installed in the cone head pressure-bearing sealing cylinder; One end of the large-taper single-pin connector is connected to one end of the transition pipe by a thread, the other end of the transition pipe is installed in the double-ended male pin connector, and the transition pipe is connected to the positioning pipe by a thread, the flat-head pressure-bearing sealing cylinder is installed in the positioning pipe, the positioning pipe is positioned by the second shoulder in the drill pipe joint, and the flat-head pressure-bearing sealing cylinder is engaged with the double-ended male pin connector to achieve sealing; The first section of the communication line led out through the magnetic core seat component is inserted into one end of the cone head pressure-bearing sealing cylinder, the end of the large-taper single-pin connector is provided with a first single-pin terminal, and the two ends of the double-ended male pin connector are respectively provided with a second single-pin terminal and a third single-pin terminal, the two ends of the second section of the communication line are respectively connected to the first single-pin terminal and the second single-pin terminal, and the third single-pin terminal is connected to the third section of the communication line introduced from the flat head pressure-bearing sealing cylinder; The cone-head pressure-bearing sealing cylinder, the large-taper single-pin connector, the double-end male pin connector and the flat-head pressure-bearing sealing cylinder all include a conductive layer and an insulating layer, and the insulating layer covers the conductive layer; The large-taper single-pin connector is engaged with the cone head pressure-bearing sealing cylinder to achieve sealing, so as to realize the pressure-bearing and sealed connection between the first component and the second component.

2. The pressure-sealed connection device for the intelligent drill pipe communication cable according to claim 1, characterized in that: The large-taper single-needle connector is provided with a connecting convex ring, and the cone head pressure-bearing sealing cylinder is provided with a connecting groove. The large-taper single-needle connector and the cone head pressure-bearing sealing cylinder are sealed by the engagement of the connecting convex ring and the connecting groove.

3. The pressure-bearing sealing connection device of the intelligent drill pipe communication cable according to claim 2, characterized in that: The flat-head pressure-bearing sealing cylinder is provided with a groove, and the double-ended male needle connector is provided with a convex ring. The flat-head pressure-bearing sealing cylinder and the double-ended male needle connector are sealed by the engagement of the convex ring and the groove therebetween.

4. The pressure-sealed connection device for the intelligent drill pipe communication cable according to claim 3, characterized in that: The magnetic core seat component includes a magnetic core seat and a magnetic core seat threaded tube. The magnetic core seat is arranged on the end face of the drill pipe joint. The magnetic core seat, the magnetic core seat threaded tube and the pressure-bearing sealing tube base are connected in sequence through threads. The first section of the communication line is led out from the magnetic core seat and inserted into one end of the cone head pressure-bearing sealing tube.

5. The pressure-bearing sealing connection device of the intelligent drill pipe communication cable according to claim 4, characterized in that: A first shoulder is provided in the base of the pressure-bearing sealing cylinder, and the first shoulder positions the cone head pressure-bearing sealing cylinder.

6. The pressure-sealed connection device for an intelligent drill pipe communication cable according to any one of claims 1 to 5, characterized in that: A first O-type sealing ring is provided between the large-taper single-pin connector and the transition pipe.

7. The pressure-sealed connection device for the intelligent drill pipe communication cable according to claim 6, characterized in that: A second O-type sealing ring is provided between the transition pipe and the double-ended male needle connector.

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