RU2184227C2 - Device for connection of individual modules of telemetric system - Google Patents

Abstract

FIELD: drilling for gas, oil and other purposes. SUBSTANCE: device for connection of individual modules of telemetric system includes part in the form of internal bushing with thread resting with its butt against thrust semi-rings which are held by retaining semi-rings fixed by lock ring that joins modules. One of modules houses member that secures axial fixation and prevents turn of modules. Thrust semi-rings carry bosses that enter under bushing. Modules are tightened one to another and to internal bushing. EFFECT: provision for reliable connection, accelerated mounting and dismounting of modules, prevention of parts matched to modules from injury. 2 cl, 4 deg

Description

 The invention relates to a technology for providing drilling for oil, gas and for other purposes. Specifically, the invention can be used to securely mount a generator or individual parts of a downhole tool as part of a downhole telemetry system.

 A device is known for connecting individual modules of the telemetric system (the attachment point of the generator in the telemetric system) [1].

 The device for connecting the individual modules of the system is combined with a unit for controlling the flow of drilling fluid. This mechanism is quite complex and contains many details. In addition, it is low-tech in the manufacture and assembly. This design reduces the flow area of the drilling fluid, which leads to an increase in the speed of the drilling fluid and rapid abrasive wear of parts intended for fixing the generator.

 A device is known for connecting individual modules of a system (generator connection unit) [2], comprising a sub and a fastener mounted in the guard of the generator mounted on the end of the sub by means of a flange connection on one side and interfaced with the generator on the other side.

The disadvantages of this device:
- low reliability of the connection of the modules included in the telemetry system,
- the complexity of connecting modules
- the occurrence of cavitation due to changes in the hydraulic section during the passage of the drilling fluid,
- a decrease in the bore, which leads to an increase in hydraulic resistance and intensive abrasive wear,
- the need for great efforts for dismantling. In this regard, a special puller is required to disassemble the connection, and when removing the module, the possibility of damage to mating parts: seals and connectors of electrical connections is not ruled out.

 As the closest analogue, a device for connecting individual modules of the telemetric system was selected [3]. The connection is achieved through a module-connecting part, including an internal adapter sleeve, seals, and a flange connection.

 The disadvantages of this device almost repeat the disadvantages of the previous one.

 The objectives of the invention are to ensure reliable fastening (with the provision of axial and circumferential fixation of the modules), reduce its diametrical dimensions, accelerate the installation and dismantling of the module, eliminating damage to the parts mating with the module.

 These tasks are achieved due to the fact that in the device for connecting individual modules of the telemetry system containing a component connecting the modules, including an inner sleeve, the connecting module is equipped with retaining half rings, persistent half rings and a locking ring, while the inner sleeve is threaded and abuts against its end persistent half rings, retained by retaining half rings, fixed by a locking ring, and in one of the modules an element is installed that provides axial fixation and prevents yuschy cranking modules. In this case, the persistent half-rings may contain a protrusion that enters under the sleeve.

 Modules can be sealed together and with an internal sleeve.

 The proposed technical solution has novelty, industrial applicability and inventive step, i.e. satisfies the criteria of the invention.

The invention is illustrated by drawings, where:
in FIG. 1 shows a diagram of the connection node of the modules of the telemetry system,
figure 2 shows the semicircular thrust 7,
figure 3 - retaining half rings 8,
figure 4 - locking ring 9.

 The device for connecting individual modules of the telemetry system contains the first module 2 and the second module 3 installed in the drill pipe string. Inside the modules 2 and 3, electronic blocks 4 are installed. An electrical connector 5 is installed at the end of module 2. The component connecting the modules is designed as an internal sleeve with thread 6, abutting against its end in half rings resistant 7 (figure 2), which are held by locking rings half 8 and fixed by a locking ring 9. The outer collar of the inner sleeve with thread 6 is adapted for s key. The persistent half rings 7, the retaining half rings (Fig. 3) and the locking ring 9 (Fig. 4) are installed in the annular groove 10 made on the first module 2. An element is provided on the second module 3, which provides axial direction and prevents rotation. This element can be made in the form of a pin 11, which is included in the groove 12, located on the first module 2. The persistent half rings 7 comprise a protrusion 13, which enter under the inner sleeve with thread 6. The inner sleeve with thread 6 is sealed along the cylindrical surfaces of modules 2 and 3 seals 14. Modules 2 and 3 are also sealed with rings 15.

 The connection of modules 2 and 3 is as follows. Seals 14 and rings 15 are pre-installed. An internal sleeve with a thread 6 is installed on the first module 2. Thrust rings 7 are installed in the annular groove 10 (figure 2), so that their protrusions 13 fit under the inner sleeve with a thread 6. The half rings are thrust 7 are fixed by retaining half rings 8 (FIG. 3), compressed by the locking ring 9 (FIG. 4). After that, the first module 2 is inserted into the second module 3 and they are pulled together by an internal sleeve with a thread 6.

 The device operates as follows. When the drilling fluid passes between the drill pipe string 1 and the device, due to the fact that the first, second modules 2, 3 and the inner sleeve with thread 6 are made of the same diameter and assembled without steps, the hydraulic resistance and abrasive wear of the parts are reduced. This will improve the operating conditions of a downhole motor using drilling fluid energy (not shown in FIG.).

The application of the invention allowed:
1. To ensure the reliability of the installation of modules in the telemetry system and their fixation in the circumferential and axial directions.

 2. Accelerate and facilitate the installation and dismantling of modules.

 3. Improve the operating conditions of the system.

 4. To prevent damage to parts interfaced with the modules, including the connecting electrical connector.

 5. To prevent the rotation of the modules during assembly, which made it possible to ensure the assembly of the electrical connector without twisting the wires.

 6. To reduce hydraulic resistance and abrasive wear due to the constant cross-section for the passage of drilling fluid and small diametrical dimensions of the device.

Sources of information
1. RU 2109940 C1, IPC E 01 B 47/00, publ. 04/27/1996.

 2. SU 1006738 A, IPC E 21 V 47/022, publ. 03/23/1983.

 3. Molchanov AA, Measurement of geophysical and technological parameters in the process of drilling wells, M., Nedra, 1983, p. 150.

Claims (3)

 1. A device for connecting individual modules of the telemetric system, comprising a component connecting the modules, including an inner sleeve, characterized in that the connecting modules the part is equipped with retaining half rings, persistent half rings and a locking ring, while the inner sleeve is threaded and thrust against its end face, held by retaining half rings, fixed by a locking ring, and in one of the modules an element is installed that provides axial fixation and prevents the modules from turning.  2. The connection device according to claim 1, characterized in that the persistent half rings contain a protrusion that enters under the sleeve.  3. The connection device according to claim 1 or 2, characterized in that the modules are sealed together and with an internal sleeve.

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