RU19091U1 - BOTTOM TELEMETRY SYSTEM - Google Patents

Abstract

1. Downhole telemetry system containing a transmitting device and electronic equipment mounted in the form of modules and including: a power supply unit, sensors of measured parameters, data processing electronics, characterized in that the modules with electronic equipment are installed after the transmitting device directly in the drill pipe, between centralizers are installed by separate modules, and each module is fixed from rotation by a movable sleeve mounted on the centralizer and pressed against the end of the module case by a nut. 2. The downhole telemetry system according to claim 1, characterized in that the teeth are made at the ends of the movable sleeve and the housing of the modules. The downhole telemetry system according to claims 1 and 2, characterized in that the movable hubs of the centralizers are only able to axially move and are fixed from turning by guide screws or pins. 4. Downhole telemetry system according to claims 1 to 3, characterized in that the centralizer on both sides has connecting threads, connecting sockets and concentric grooves for the sealing rings. 5. The downhole telemetry system according to claims 1 to 4, characterized in that the lower centralizer is closed on the free side by a lid having the same teeth on the end face as on the ends of the movable sleeve and the module housings.

Description

BOTTOM TELEMETRY SYSTEM

The utility model relates to technology for drilling for oil, gas and for other purposes. Specifically, the utility model is intended to determine the spatial orientation of the layout of the bottom of the drill string, as well as the operational management of the drilling of directional and horizontal wells.

Known telemetry system "Slaughter according to the report of VNIIGIS, 1993, having a modular layout and containing modules of technological, geophysical and inclinometric converters, a turbogenerator, a transmitter module, an electrical separator. The disadvantage of the telemetry system is the presence of body parts, the design of which has high rigidity, limiting the radius of the trajectory when drilling directional wells.

Known telemetry system according to the patent of the Russian Federation No. 2105880, MKP6 E2Sh47M2 including a drill string, a housing, a power supply, measuring modules, a transmitter module, an electrical splitter. The diameters of the housing of the measuring modules and the power supply are made smaller than the inner diameter of the drill string. The individual modules are interconnected by flexible in the radial direction and rigid in the longitudinal direction of the bonds. As a connection between the modules, radially flexible metal pipes with a diameter smaller than the diameter of the module casing were used. Centralizers are located on the pipes at the base of the modules, and inside the pipes are electric wires that provide electrical communication between the modules. The complexity of the design leads to a decrease in reliability and increases the time to prepare the telemetry system for work. A significant disadvantage of telemetry

MCP 6 Е21В47Х12

The system is also the lack of fixation of modules and centralizers from a turn, which reduces the accuracy of measuring inclinometric parameters, as well as depressurization of the module housing and failure of electronic equipment. The tasks of creating a utility model are:

securing and protecting downhole equipment from high pressure,

ensuring uninterrupted operation of downhole equipment,

improvement of measurement accuracy,

providing convenience in work,

increasing the speed of mounting and dismounting the telemetry system as part of the drill string,

These tasks are solved by the new layout of the downhole telemetry system.

The downhole telemetry system contains: a transmitting device and electronic equipment including: a power supply, sensors of measured parameters, data processing electronics. The electronic equipment is mounted in the form of modules that are installed directly after the transmitter in the drill pipe, and centralizers are installed between the individual modules. Each module is fixed from rotation by a movable sleeve mounted on a centralizer and pressed against the end of the module housing by a nut. At the ends of the movable sleeve and the module housings, teeth are made that engage during assembly. The movable hubs of the centralizers can only axially move and are secured against rotation by guide screws or pins. The centralizer has connecting threads, connecting sockets and concentric grooves for sealing rings on both sides, which ensures the electrical connection of individual modules and the tightness of electronic equipment.

The lower centralizer is closed on the free side by a cover having the same teeth on the end face as on the ends of the movable sleeve and the module housings.

The use of these components and parts made it possible to reliably mount electronic equipment and ensure its operability in downhole conditions at high pressure and temperature, as well as reliably center and fix a module with inclinometric sensors from a turn, which made it possible to increase the measurement accuracy.

Patent studies have shown that the proposed technical solution has novelty and industrial applicability, i.e. satisfies the criteria of a utility model.

The essence of the utility model is illustrated in FIG. 1 ... 3, where:

in FIG. 1 shows the downhole telemetry system,

figure 2 shows the connection of individual modules with a centralizer,

Fig. 3 shows an embodiment of the teeth that provide

fixing the module case with a movable sleeve from a turn,

figure 4 shows a view of the teeth from the side of the end.

The downhole telemetry system contains: a transmitting device 1 and electronic equipment including: a power supply, sensors of measured parameters, data processing electronics. The electronic equipment is mounted in the form of modules 2, which are installed immediately after the transmission device in the drill pipe 3, and centralizers 4 are installed between the individual modules. Each module is fixed against rotation by a movable sleeve 5 mounted on the centralizer 4 and pressed against the end of the module case by nut 6. On the ends of the movable sleeve and the module housings have teeth 7 and 8, which are engaged during assembly. Moving hubs of centralizers have the ability to only axial movement and are fixed from a turn

3

guiding screws or pins 9. The centralizer on both sides has connecting threads, connecting connectors 10 and concentric grooves for the snap rings 11. The lower centralizer is closed on the free side by a cover 12 having the same teeth on the end face as on the ends of the movable sleeve 5 and the module housings 2.

Downhole telemetry system works as follows. The sensors of the measured parameters record the temperature, pressure, magnetic field, etc. The received information goes to the data processing electronics, where the information is processed, and goes to the transmitting device 1, which generates a signal for transmission to the surface. The power supply provides electronic equipment with electricity. To reduce the error in measuring the magnetic field necessary to determine the azimuth of the well, the sensors of the measured parameters are located below, which corresponds to the maximum distance from the steel locks of the alloy drill pipe 3. Centralizers 4 connect the individual modules 2 to each other, orient the modules in the drill pipe. When assembling the module with a centralizer, an electrical connection is made to the connector allowing rotation and sealing of the connection of the module with the centralizer by the scraper rings 13. The movable sleeves 5 of the centralizers are fixed against rotation by the guide screws or pins 9. Each movable sleeve 5 mounted on the centralizer 4 engages its teeth 7 with teeth 8 are made at the end of the module and is fixed with a nut 6, which prevents its axial displacement, as well as the module’s turn. The angle a formed by the tooth is less than half the angle P formed by the tooth and the cavity, which provides free assembly of the module and the centralizer.

Application of the utility model allowed:

1. Ensure fastening and protection of downhole equipment from high pressure and temperature.

3. To ensure uninterrupted operation of downhole equipment.

4. To ensure the unification of the details of the telemetry system.

5. Reduce the complexity of maintenance during the operation of the telemetry system.

Authors: / fyy1 - “s / fVarlamov S.E.

72 8 O 2.

 - X Porval A.M.

/ LЈX f. 0%.

IB. o2.

Tokman A.V.

02 2001 g

Claims (5)

1. Downhole telemetry system containing a transmitting device and electronic equipment mounted in the form of modules and including: a power supply unit, sensors of measured parameters, data processing electronics, characterized in that the modules with electronic equipment are installed after the transmitting device directly in the drill pipe, between centralizers are installed by separate modules, and each module is fixed from rotation by a movable sleeve mounted on the centralizer and pressed against the end of the module case by a nut.  2. The downhole telemetry system according to claim 1, characterized in that the teeth are made at the ends of the movable sleeve and the housing of the modules.  3. The downhole telemetry system according to claims 1 and 2, characterized in that the movable hubs of the centralizers are only able to axially move and are fixed from turning by guide screws or pins.  4. Downhole telemetry system according to claims 1 to 3, characterized in that the centralizer on both sides has connecting threads, connecting connectors and concentric grooves for the sealing rings. 5. Downhole telemetry system according to claims 1 to 4, characterized in that the lower centralizer is closed on the free side by a lid having the same teeth on the end face as on the ends of the movable sleeve and the module housings.