Well logging short section

Abstract

The utility model relates to a well logging short section which comprises a screwed plug, a first outer cylinder, a first connector, a second outer cylinder, an adapter, a first joint, a second joint, a third joint, an adapter sleeve, a second connector and a protective sleeve. The adapter is hinged to the first joint, the first joint is hinged to the second joint, the second joint is hinged to the third joint, the third joint is hinged to the reducing sleeve, a corrugated pipe assembly is arranged in a cavity among the adapter, the first joint and the second joint, a corrugated pipe assembly is arranged in a cavity among the second joint, the third joint and the reducing sleeve, and a needle type socket is arranged in a cavity of the first joint. The outer end of the pin-type socket is provided with a pressure-bearing disc which is movably sealed with the outer cylinder I, the two sides of the pressure-bearing disc are fixedly connected with contact pins, the pressure-bearing disc is in sealed insertion connection with the pin-type socket through the contact pins, a connector socket is arranged in the cavity of the joint II, and the pin-type socket is connected with the connector socket through a wire. When descending into a well, the device can be bent in any direction, so that the reliability of well logging is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum engineering, in particular to a well logging sub. Background Art

[0002] When multiple logging instruments are used for logging, they need to be connected into an instrument string using a logging sub. Since the borehole has bends, the instrument string may be damaged in the wellbore portion with a small slope.

[0003] The flexible short section is installed in the middle section of the instrument string. It not only plays the role of mechanical connection between the instruments at both ends, but also has standard plugs and sockets at both ends to complete the electrical connection, so that the electrical signals and data instructions of the instruments at both ends can flow smoothly.

[0004] The existing flexible short section has a small change in angle. The pins of the connector plug inside the short section are protruding and are vulnerable parts. The connector plug is made of non-pressure-resistant material. The connector plug is easily damaged when working under pressure underground. Once damaged, the short section needs to be returned to the factory to replace the connector plug and rewire, which has a long maintenance cycle and a large workload. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a well logging short joint with a large bending angle and convenient maintenance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A logging pup joint comprises a thread plug, an outer tube 1, a joint 1, an outer tube 2, an adapter, a joint 1, a joint 2, a joint 3, an adapter sleeve, a joint 2 and a protective sleeve which are connected in sequence; the adapter is hinged to the joint 1, the joint 1 is hinged to the joint 2, the joint 2 is hinged to the joint 3, the joint 3 is hinged to the adapter sleeve, a bellows assembly is arranged in the cavity between the adapter, the joint 1 and the joint 2, a bellows assembly is arranged in the cavity between the joint 2, the joint 3 and the adapter sleeve, a pin socket is arranged in the cavity of the joint 1, a pressure plate which is movably sealed with the outer tube 1 is arranged at the outer end of the pin socket, pins are fixed on both sides of the pressure plate, the pressure plate is sealed and plugged with the pin socket through the pins, a connector socket is arranged in the cavity of the joint 2, and the pin socket and the connector socket are connected by a wire.

[0008] A sealing disc is arranged inside the adapter sleeve to seal the end of the second joint.

[0009] The shell of the second outer cylinder is provided with a vent hole connected with the cavity, the cavity of the second outer cylinder is provided with a piston seat, the outer circle of the piston seat is slidably connected with the piston, and the outer periphery of the piston seat is provided with a spring connected with the piston.

[0010] The bellows assembly comprises a bellows, both ends of the bellows are connected with end sleeves, and the end sleeves are connected with a short-axis tube.

[0011] The thread plug is connected to the outer tube in a threaded manner.

[0012] The sheath is connected to the joint by two threaded detachable connections.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] 1) Pins are fixed on both sides of the pressure plate of the utility model. The pressure plate is sealed and plugged with the pin socket through the pins. The pressure plate has a sealing function to prevent mud from entering and damaging the pin socket, and also has a plug function, which can be connected to other logging instruments without obstacles. In addition, the pressure plate can be disassembled and replaced conveniently, shortening the maintenance time.

[0015] 2) The utility model adopts a multi-link articulation, in which the adapter is hinged with joint 1, joint 1 is hinged with joint 2, joint 2 is hinged with joint 3, and joint 3 is hinged with the adapter sleeve, so that the short section has a large bending degree. A bellows assembly is provided in the cavity between the adapter, joint 1 and joint 2, and a bellows assembly is provided in the cavity between joint 2, joint 3 and the adapter sleeve, so that the short section has a flexible bending function.

[0016] The utility model can be bent freely, so that it can be bent in any direction when lowered into the well, so that the instrument string can move freely up and down in the well, prolonging the practical life of the logging instrument and improving the reliability of logging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model.

[0018] Figure 2 It is an internal schematic diagram of the utility model.

[0019] Figure 3 Schematic diagram of the bellows assembly.

[0020] Figure 4 It is a structural schematic diagram of the pressure plate.

[0021] In the figure: thread plug 1, outer tube 1 2, joint 1 3, outer tube 2 4, adapter 5, joint 1 6, joint 2 7, joint 3 8, adapter sleeve 9, joint 2 10, sleeve 11, bellows assembly 12, vent 13, piston seat 14, piston 15, spring 16, pin socket 17, pressure plate 18, pin 19, connector socket 20, sealing plate 21, bellows 22, end sleeve 23, short shaft tube 24. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means more than two.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] like Figure 1-Figure 4 A logging pup joint comprises a plug 1, an outer tube 2, a joint 3, an outer tube 4, an adapter 5, a joint 1 6, a joint 2 7, a joint 3 8, an adapter sleeve 9, a joint 2 10 and a sheath 11 which are connected in sequence; the adapter 5 is hinged to the joint 1 6, the joint 1 6 is hinged to the joint 2 7, the joint 2 7 is hinged to the joint 3 8, the joint 3 8 is hinged to the adapter sleeve 9, a bellows assembly 12 is arranged in the cavity between the adapter 5, the joint 1 6 and the joint 2 7, a bellows assembly 12 is arranged in the cavity between the joint 2 7, the joint 3 8 and the adapter sleeve 9, a pin socket 17 is arranged in the cavity of the joint 1 3, a pressure plate 18 which is movably sealed with the outer tube 1 is arranged at the outer end of the pin socket 17, the pressure plate 18 is made of metal, pins 19 are fixed on both sides of the pressure plate 18, and the pin arrangement on the outer side of the pressure plate 18 is consistent with the standard plug. The pressure plate 18 is sealed and plugged with the pin socket 17 through the inner pin 19. The pressure plate 18 has both pressure resistance and sealing function, and also has the function of a plug. In addition, the pressure plate 18 can be disassembled and replaced easily.

[0025] A connector socket 20 is provided in the cavity of the second connector 10 , and the pin socket 17 and the connector socket 20 are connected via a wire.

[0026] The adapter sleeve 9 is provided with a sealing disk 21 which is sealed at the end of the second connector 10. The sealing disk 21 seals the connector socket 20 in the second connector 10 to prevent mud from entering.

[0027] The shell of the outer cylinder 4 is provided with a vent hole 13 connected to the cavity, the cavity of the outer cylinder 4 is provided with a piston seat 14, the outer circle of the piston seat 14 is slidably connected to a piston 15, and the outer periphery of the piston seat 14 is provided with a spring 16 that is in contact with the piston 15.

[0028] The bellows assembly 12 comprises a bellows 22 , both ends of the bellows 22 are connected to end sleeves 23 , and the end sleeves 23 are connected to a short-axis tube 24 .

[0029] The thread plug 1 is threadably connected to the outer cylinder 2.

[0030] The sheath 11 is threadedly connected to the connector 2 10 .

[0031] In order to make the purpose, technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model is now described clearly and completely. However, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. In combination with the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Example

[0033] A logging pup joint includes a plug 1, an outer tube 2, a joint 3, an outer tube 4, an adapter 5, a joint 6, a joint 7, a joint 8, an adapter sleeve 9, a joint 10, and a sheath 11 connected in sequence; the plug 1 is threadedly connected to the outer tube 2. The sheath 11 is threadedly connected to the joint 10.

[0034] The shell of the outer cylinder 4 is provided with a vent hole 13 connected to the cavity. The cavity of the outer cylinder 4 is provided with a piston seat 14. The outer circle of the piston seat 14 is slidably connected to a piston 15. The outer periphery of the piston seat 14 is provided with a spring 16 that is in contact with the piston 15.

[0035] The adapter 5 is hinged to joint 1 6, joint 1 6 is hinged to joint 2 7, joint 2 7 is hinged to joint 3 8, joint 3 8 is hinged to adapter sleeve 9, a bellows assembly 12 is provided in the cavity between the adapter 5, joint 1 6 and joint 2 7, the bellows assembly 12 includes a bellows 22, both ends of the bellows 22 are connected to end sleeves 23, and a short axis tube 24 is connected inside the end sleeve 23.

[0036] A bellows assembly 12 is provided in the cavity between joint two 7, joint three 8 and the adapter sleeve 9, a pin socket 17 (32-core socket) is provided in the cavity of connector one 3, a pressure plate 18 movably sealed with the outer tube one is provided at the outer end of the pin socket 17, 32-core pins 19 are fixedly connected to both sides of the pressure plate 18, the pressure plate 18 is sealed and plugged with the pin socket 17 through the pins 19, a connector socket 20 (32-core socket) is provided in the cavity of connector two 10, and the pin socket 17 and the connector socket 20 are connected by a wire.

[0037] A sealing disk 21 is provided in the adapter sleeve 9 to seal the end of the second joint 10 .

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and basic spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A logging sub, characterized in that: It includes a wire plug, an outer tube 1, a joint 1, an outer tube 2, an adapter, a joint 1, a joint 2, a joint 3, an adapter sleeve, a joint 2 and a sheath which are connected in sequence; the adapter is hinged to the joint 1, the joint 1 is hinged to the joint 2, the joint 2 is hinged to the joint 3, the joint 3 is hinged to the adapter sleeve, a bellows assembly is provided in the cavity between the adapter, the joint 1 and the joint 2, a bellows assembly is provided in the cavity between the joint 2, the joint 3 and the adapter sleeve, a pin socket is provided in the cavity of the joint 1, a pressure plate which is movably sealed with the outer tube 1 is provided at the outer end of the pin socket, pins are fixed on both sides of the pressure plate, the pressure plate is sealed and plugged with the pin socket through the pins, a connector socket is provided in the cavity of the joint 2, the pin socket and the connector socket are connected by a wire.

2. A logging sub according to claim 1, characterized in that: A sealing disc is arranged inside the adapter sleeve to seal the end of the second joint.

3. A logging sub according to claim 1, characterized in that: The shell of the second outer cylinder is provided with a vent hole connected with the cavity, the cavity of the second outer cylinder is provided with a piston seat, the outer circle of the piston seat is slidably connected with the piston, and the outer periphery of the piston seat is provided with a spring connected with the piston.

4. A logging sub according to claim 1, characterized in that: The bellows assembly comprises a bellows, both ends of which are connected with end sleeves, and the end sleeves are connected with a short-axis tube.

5. A logging sub according to claim 1, characterized in that: The thread plug is connected to the outer tube in a threaded manner.

6. A logging sub according to claim 1, characterized in that: The sheath is connected to the joint by two threaded detachable connections.

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