RU178253U1 - TELEMETRIC DEVICE WITH HYDRAULIC COMMUNICATION CHANNEL - Google Patents

Abstract

The utility model relates to geophysical equipment for accompanying directional drilling of wells in order to determine the parameters of a well trajectory by magnetometric inclinometry, rock composition by gamma-ray logging, rock porosity by neutron-neutron logging with a radionuclide source of neutron radiation and saturation of rocks by high-frequency induction logging, as well as the transfer of measurement results to the earth's surface using the method of hydro-pulse telemetry About post wash liquid in real time. The technical result of the claimed utility model is to increase the accuracy of determining the parameters of the well trajectory and rock properties in the near-wellbore space. A telemetry device with a hydraulic communication channel contains a cylindrical body made of non-magnetic material, inside of which a rotor-type pulsator module, an autonomous electrical power module, an inclinometry module and gamma-ray logging module, a resistivity meter and a neutron logging module are rigidly fixed in series with each other in height. At the same time, a circulation sub is located in the upper part of the housing, containing a saddle with a drilling fluid supply channel rigidly fixed to the inner surface of the circulation sub. At the same time, a rotor-type pulsator module is rigidly fixed in the saddle, containing a shaft configured to open / close the valve in the drilling fluid supply channel when the shaft rotates, at the upper end of which a trap is rigidly fixed, which ensures complete removal of the modules from the well.

Description

FIELD OF TECHNOLOGY

The utility model relates to geophysical equipment for accompanying directional drilling of wells in order to determine the parameters of a well trajectory by magnetometric inclinometry, rock composition by gamma-ray logging, rock porosity by neutron-neutron logging with a radionuclide source of neutron radiation and saturation of rocks by high-frequency induction logging, as well as the transfer of measurement results to the earth's surface using the method of hydro-pulse telemetry About post wash liquid in real time.

BACKGROUND

Known downhole telemetry system disclosed in RU 152446 U1, publ. 05/27/2015. The disadvantage of the device is the following:

1. Unrecoverable structure, in the event of an emergency while drilling a well, well modules cannot be removed to the surface, and they may be lost when the accident is liquidated.

2. The measuring modules do not allow to determine the saturation and porosity of the rocks, only the direction of the well, the zenith angle and the composition of the surrounding rocks.

3. Intermodular connection is carried out using a flexible cable, the insulation of which may be violated during operation due to vibration during drilling and friction against the inner wall of the sealed enclosure where the specified cable is located.

4. The transfer of control commands from the earth's surface to the downhole telemetry system is carried out by turning on / off the circulation according to a certain algorithm, and due to the high level of interference from the pumps of the drilling rig, situations may arise when the built-in sensor is triggered by the pressure signal in the flushing fluid supply line interference, there is a false recognition of control commands and unauthorized switching of the operating modes of the downhole telemetry system.

The closest solution is a partially retrievable downhole telemetry system of a modular design with an oil-filled pulsator of a rotor type (www.aps-tech.com and http://www.qeotrend.ru/destinations/telemetry_system/geotrend_pulse/), the main disadvantages of this system are:

1. The borehole modules of the telemetry system are only partially removed, the resistivity meter module is made in the form of a power pipe of the drilling assembly and cannot be removed.

2. An oil-filled rotary pulsator to compensate for external pressure, which reduces its reliability, reduces interoperational service time and requires expensive equipment for pulsator maintenance and oil pumping.

3. The measurement modules lack a neutron logging module for measuring rock porosity.

4. The transfer of control commands from the surface is carried out by sequentially turning on / off the circulation of flushing fluid and rotating the drilling tool with the rotor of the drilling rig, while there are only two options for simultaneously changing the operating mode of the telemetry system - changing the width of the pressure pulse from the rotary pulsator and changing the data transfer protocol to surface and there is no way to change the composition of the data packet for transmission to the earth's surface by hydro-pulse telemetry.

DISCLOSURE OF A USEFUL MODEL

The objective of the claimed utility model is the development of a telemetry device with a hydraulic communication channel, which allows it to be completely removed in case of an emergency and sticking of a drilling tool.

The technical result of the claimed utility model is to reduce distortion in determining the parameters of the well path and rock properties, increasing the reliability and accuracy of determining and transmitting the parameters of the well path and rock properties.

The specified technical result is achieved due to the fact that the telemetry device with a hydraulic communication channel contains a cylindrical body made of non-magnetic material, inside of which a rotor-type pulsator module, an autonomous electrical power module, an inclinometry module and a gamma-ray logging module are rigidly sequentially fixed in height along each other resistivity meter and neutron logging module. At the same time, a circulation sub is located in the upper part of the housing, containing a saddle with a drilling fluid supply channel rigidly fixed to the inner surface of the circulation sub. At the same time, a rotor-type pulsator module is rigidly fixed in the saddle, containing a shaft configured to open / close the valve in the drilling fluid supply channel when the shaft rotates, while longitudinal slots are made in the area of the resistivity meter module in the body, filled with sealed inserts of radiolucent material, this neutron logging module contains a capsule made with the possibility of lateral loading of a radionuclide radiation source.

The shaft in the pulsator module is rigidly fixed by means of a thrust bearing and stuffing box seal.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be more clear from the description, which is not restrictive and given with reference to the accompanying drawings, which depict:

FIG. 1 - Section telemetry device.

FIG. 2 - Enlarged section of the circulation sub

FIG. 3a - An enlarged longitudinal section of a telemetry device in the area of the resistivity meter module.

FIG. 3b is a cross-sectional view of a telemetry device in the region of a resistivity meter module.

FIG. 4 - Enlarged section of the neutron logging module.

FIG. 5 - intermodular connection modules telemetry device

1 - housing; 2 - module pulsator rotary type; 3 - module autonomous electrical power; 4 - inclinometry module and gamma ray logging; 5 - resistivity meter module; 6 - neutron logging module; 7 - circulation sub; 8 - a saddle; 9 - trap; 10 - valve; 11 - rubber centralizers; 12 - shaft; 13 - screw; 14 - stuffing box seal; 15 - thrust bearing; 16 - bus power wires and communication lines; 17 - capsule; 18 - multi-pin connector; 19 - a rubber ring; 20 - receiving coil; 21 - transmitting coil; 22 - channel for supplying drilling fluid; 23 — longitudinal slots 24 — insert of radiolucent material.

IMPLEMENTATION OF A USEFUL MODEL

A telemetry device with a hydraulic communication channel contains a cylindrical body (1) made of non-magnetic material, inside of which, in series with each other, a rotor-type pulsator module (2), an autonomous electric power module (3), inclinometry module (4) and gamma are rigidly fixed to each other in height logging, resistivimeter module (5) and neutron logging module (6). At the same time, in the upper part of the casing there is a circulation sub (7) containing a saddle (8) with a channel (22) for supplying drilling fluid rigidly fixed to the inner surface of the circulation sub (7). At the same time, in the saddle (8), the rotor-type pulsator module (2) is rigidly fixed, comprising a shaft (12) configured to open / close the valve (10) in the drilling fluid supply channel (22) when the shaft (12) rotates, on the upper at the end of which a trap (9) is rigidly fixed, which ensures complete extraction of modules (2-6) from the well.

The cylindrical housing (1) is made integral in the form of pipes of non-magnetic material. The length of the housing pipes (1) corresponds to the length of the modules (2-6). The pipes are rigidly interconnected by means of a threaded connection.

The shaft (12) in the pulsator module (2) is rigidly fixed by means of a thrust bearing (15) and an stuffing box seal (14). The implementation of the shaft, rigidly fixed in the pulsator module using a thrust bearing and stuffing box seal, ensures the absence of external pressure compensation in the pulsator module, which ensures the reliability of the device and the transmission of information without distortion with high accuracy of the measured parameters by the modules.

Three longitudinal slots with a length corresponding to the length of the coils (20, 21) and evenly spaced along the circumference of the circumference of the housing (1), while the longitudinal slots (23) are filled with sealed inserts (24) of radiolucent material. This embodiment allows to reduce the distortion of the electromagnetic signal, which provides improved measurement accuracy.

The neutron logging module (6) comprises a capsule (17) configured to laterally load a radionuclide radiation source. Lateral loading of the radionuclide source into the neutron logging module allows the power bus and digital data to be transited through the module, which makes it possible to install the neutron logging module in the telemetry device arrangement above the inclinometry module and gamma-ray logging; thereby, measurements from the induced gamma-ray radionuclide source are eliminated on measurements of the natural radioactivity of rocks by the gamma method.

The rotor-type pulsator module (2) is configured to change the operation parameters of the downhole telemetry device when the drilling tool rotates the rotation tool on / off by the rotor of the drilling rig.

Rigid mounting of the rotor-type pulsator module in the seat of the circulation sub, which, in turn, is rigidly fixed on the inner surface of the circulation sub of the drilling assembly, ensures reliable electrical contact of the pipe of the resistivity meter module with the measuring "zero" of the potential of the resistivity meter module, which suppresses capacitive pickup on the antennas of the resistivity meter module located inside the pipe of the drilling tool, and thereby significantly increases the accuracy of measurements of specific electric on the resistance of rocks. At the same time, the implementation of a pulsator of exactly the rotary type allows it to shut off the drilling fluid supply channel by a controlled amount until the channel is completely blocked, which ensures the optimal level of the useful signal with respect to interference from the mud pumps and bits and improves the reliability of the transmission of information from the measuring modules telemetry device to the earth's surface.

In accordance with FIG. 1-5 downhole telemetry device with a hydraulic communication channel operates as follows.

Well modules of a telemetry device — a rotor-type pulsator module (2), an autonomous electrical power module (3), an inclinometry module and gamma ray logging module (4), a resistivity meter module (5) and a neutron logging module (6) are assembled at the receiving bridges of the drilling rig by inserting modules (2-6) into each other with rigid fastening by means of fasteners (screws). The intermodular connection is additionally sealed with rubber rings (19). The modules are electrically interconnected using the upper and lower multi-pin connectors (18) of the modules (2-6), and the multi-pin connectors (18) are interconnected using the bus (16) of the power wires and communication lines. After connecting the modules (2-6), the operability of the module assembly is checked by connecting the ground station to the lower multi-pin connector (18) of the neutron logging module (6). After checking the operability and programming the operating modes of the telemetry device, the interconnected modules (2-6) are lifted, while the installation of the radionuclide source in the neutron logging module (6) is carried out with lateral loading of the radionuclide source into the capsule (17). Then, interconnected modules (2-6) are installed in the housing (1) of the telemetry device made of non-magnetic material (non-magnetic Mn-Cr steel grades P550, P580, magnadur 501 and 601) and the module (2) of the rotary pulsator type in the saddle (8) inside the channel (22) for supplying drilling fluid located in the circulation sub (7). In this case, the modules (2-6) inside the housing (1) are centered along its height with the help of rubber centralizers (11) installed in each module (2-6). The saddle (8) and the rotor-type pulsator module (2) inserted into the saddle are fixed with screws (13), which provide a rigid fixation of the saddle (8) on the inner surface of the circulation sub (7) and the rotor-type pulsator module (2) in the saddle ( 8). At the upper end of the housing (1) - circulation sub (7), the first drill pipe is fixed (with screws or screws), and to the lower end of the housing (1) - to the drilling tool, after which the drilling equipment is lowered (telemetry device with drill pipes and drilling tool) by building drill pipe. After the drilling rig is lowered into the drilling area, the drilling rig pumps are turned on, the circulating drilling fluid is supplied through the drill pipes, the drilling fluid supply channel (22) and the space between the inner surface of the casing (1) and the modules (2-6) into the drilling tool and then the drilling fluid through the space between the casing (1) and the wall of the well with the help of the pump enters the surface. The supply of drilling fluid provides the launch of the drilling engine and the rotation of the bit, which ensures the drilling of the well. In this case, the downhole telemetry device independently determines the presence of drilling fluid circulation by the pressure sensor of the rotor-type pulsator module (2), and the measuring modules (4-6) are activated, which determine the well characteristics: the inclinometry module (4) and the gamma-ray log determine the trajectory data wells and rock composition; resistivimeter module (5) - electrical resistivity of rocks; neutron logging module (6) - rock porosity. In the downhole telemetry device, the power of the modules (2, 4-6) is carried out using the module (3) of an autonomous electric power supply via the bus (16) of the power wires and communication lines. The received data from the measuring modules (4-6) are sent to the data acquisition unit to the rotor-type pulsator module (2), which creates a sequence of pressure pulses by blocking the drilling fluid supply (10) valve for opening / closing the drilling fluid supply in accordance with received data from measuring modules (4-6). Due to the continuity of the flow of the drilling fluid above the valve (10), pressure pulses propagate to the wellhead. The channel of the drilling fluid supply is blocked by rotating the shaft (12) connected to the valve (10), rigidly fixed by means of a thrust bearing (15) and stuffing box packing (14) in the rotor-type pulsator module (2), which rotates the channel supply of drilling fluid by opening or closing the valve (10) during rotation of the shaft (12). A pressure sensor is mounted on the earth’s surface to the drilling fluid supply line, which receives pressure pulses from the rotor-type pulsator module (2) and transmits to the ground station decoding device, in which the information from the modules is decoded, processed and visualized (2, 4-6) downhole telemetry device, which allows you to make operational decisions on the choice of direction of well drilling.

Also in the process of drilling a well, it becomes necessary to change individual parameters of the downhole telemetry device (pressure pulse width, data from measuring modules (4-6)). To do this, commands are transmitted from the earth's surface to the borehole modules (2, 4-6) of the downhole telemetry device for changing operating modes by turning on / off the rotation of the drilling tool with the rotor of the drilling rig, while the downhole telemetry device independently recognizes the presence of rotation of the drilling tool and the algorithm on / off rotation to switch the operation mode of the downhole telemetry device.

In the event of an emergency or seizure of the drilling tool, a fishing tool is lowered into the drilling rig with an overshot on a cable or on an armored load-carrying cable, which allows to capture the trap, after which a force is created that breaks the screws (13) and removes all the modules (2 -6) downhole telemetry device to the surface, including the neutron logging module (6) with a radionuclide source. This is extremely important, since the abandonment of a radionuclide radiation source in the well entails costly fishing operations, up to the elimination of the already drilled wellbore.

An important feature of the claimed utility model is the absence of external pressure compensation in the module (2) of the rotor-type pulsator, which can significantly increase the reliability of the module and simplify the design, and reduce maintenance costs of the module, because expensive equipment for pumping oil in the hydraulic system is eliminated. In the pulsator module (2), the shaft (12) of the valve actuator (10) and the inner cavity of the pulsator are protected from external hydrostatic pressure up to 80 MPa due to the use of stuffing box packing (14) without hydrocompensation of external pressure, while compensating for axial force on the shaft (12) caused by external pressure, it is supported by a thrust bearing (15).

The use of module (6) of neutron logging allows you to obtain additional information on the composition and porosity of rocks during drilling and to more accurately determine in combination with modules (4-5) the characteristics of rocks in the near-wellbore space in order to determine the optimal position of the wellbore in the reservoir .

The location of the inclinometry module (4) and gamma ray logging in the downhole telemetry device allows it to be located at a remote distance from the magnetic elements of the drilling tool, which distort the measurement of magnetometric inclinometry parameters.

The use of a resistivimeter in the case (1), in the area of the module (5), of longitudinal slots (23) filled with sealed inserts (24) of a translucent material (polyetheretherketone) allows to reduce the distortion of the electromagnetic signal, which ensures the accuracy of the measurement of the resistivity meter module (5).

A utility model has been disclosed above with reference to a specific embodiment. For specialists, other embodiments of the utility model that do not change its essence, as disclosed in the present description, may be obvious. Accordingly, a utility model should be considered limited in scope only below by the following claims.

Claims (2)

1. A telemetry device with a hydraulic communication channel, comprising a cylindrical body made of non-magnetic material, inside of which a rotor-type pulsator module, an autonomous electrical power module, an inclinometry module and gamma-ray logging module, a resistivity meter module and a neutron logging module are rigidly fixed in series with each other in height, at the same time, a circulation sub is located in the upper part of the casing, containing a saddle with a drilling fluid supply channel, rigidly fixed to the inner surface the surface of the circulating sub, with a rotor-type pulsator module rigidly fixed in the saddle, containing a shaft configured to open / close the valve in the drilling fluid supply channel when the shaft rotates, while longitudinal slots are made in the area of the resistivity meter module in the housing, filled with sealed inserts from radio-transparent material, while the neutron logging module contains a capsule made with the possibility of lateral loading of a radionuclide radiation source. 2. The device according to claim 1, characterized in that the shaft in the pulsator module is rigidly fixed by means of a thrust bearing and stuffing box seal.

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