RU2801729C1 - Geosteering complex combined with a near-bit module for measuring force parameters - Google Patents

Abstract

FIELD: oil and gas.

SUBSTANCE: complex contains a processing and visualization unit in the form of a computer connected to a monitor, a downhole telemetry system located in close proximity to the downhole motor, and a tool for inclinometric measurements. The near-bit module for measuring force parameters is located above the bit and is equipped with a sensor to start measurements. The body of the bit module is formed by the upper and lower subs, a strain gauge transducer in the lower part of the lower sub with resistance strain gauges glued to its inner surface. The internal cavity of the strain gauge transducer is filled with an inert liquid and the channel communicates with the pressure compensator. Inside the case, in a container on shock absorbers, a power supply unit and an electronic unit with a transmitting module connected by a wireless channel to a telemetry system transmitting the measured power parameters to the surface along with the results of inclinometric measurements are installed.

EFFECT: prevention of deviation of the wellbore from the specified direction.

1 cl, 2 dwg

Description

The invention relates to the drilling of oil and gas wells and is intended for operational control of the drilling of directional and horizontal wells. The complex is used in conjunction with devices for measuring parameters to orient the well during drilling and determine the power parameters in the drill string, including above the bit.

Known information technology geo-navigation complex (Pat. RF No. 2208154, E21B 44/00), containing a driller's console, a processing and visualization unit, made in the form of interconnected converter complex and a computer with a monitor, downhole telemetry system, torque sensor, ground a gas analyzer, a flow sensor and a pressure sensor, and an inclinometer unit and an axial load sensor installed in the body of the downhole telemetry system. The complex is equipped with a surface density sensor and a gas phase presence sensor, a drilling fluid level sensor installed in the receiving tank, and control system actuators connected to the computer output. Surface flow sensor, pressure sensor, density sensor and gas phase sensor are installed in the drilling fluid injection line. The torque sensor is installed in the body of the downhole telemetry system.

The disadvantage of this device is the lack of measurement of the bending moment over the bit during drilling, the action of which on the drill string in the lower section can lead to spontaneous deviation of the wellbore from a given direction.

Known bit module (Pat. RF No. 2633884, E21V 47/00), containing a housing with a central flushing hole, as well as placed in the recesses of the housing, in its sealed part, separated by sealing elements, electronic boards and a power source. The wire connecting the electronic boards with the nipple part of the housing is fixed with a contact screw on the nipple part of the housing. The housing is formed from the pin and coupling parts interconnected by a conical helical surface, in the gap of which an electrical insulating material is placed between the threaded surfaces of the mating parts. Insulators are placed on a part of the outer cylindrical surface along the length of the body and in the inner channel of the nipple part of the body. On the outer surface of the coupling part of the housing, in the area of the electronic boards and power supply, there is a protective sleeve, one end of which is fixed by means of protrusions and grooves, and the other end - by screws. The coupling and nipple parts are equipped with interlocking threads for connection with the bit and downhole motor shaft, respectively.

The disadvantage of this device is the lack of measurements of torque and bending moments on the bit during drilling.

The objective of the invention is to combine a downhole telemetry system and a downhole device for measuring power parameters, which allow measuring during drilling and transmitting to the daylight surface the readings of the zenith angle and azimuth of the well, axial weight on bit, torque and bending moments of the bottom of the drill string.

The task is achieved by the fact that in the geosteering complex with a downhole device for measuring power parameters, containing a processing and visualization unit, made in the form of interconnected converter complex and a computer with a monitor, a downhole telemetry system located in close proximity to the downhole motor, a torque sensor , according to the proposed solution, an over-the-bit module for measuring force parameters is additionally installed, located directly above the bit, the body of which is formed by the upper and lower subs, in the lower part of the sub, a strain gauge is made with strain gauges glued to its inner surface, the inner cavity of the strain gauge is filled with an inert liquid and the channel communicates with a pressure compensator, inside the body in a special container on shock absorbers, a power supply unit and an electronic unit with a transmitting module connected by a wireless channel with a telemetry system are installed;

To solve this problem, two additional devices are included in the drill string: Fig. 1 - telemetry system and Fig. 2 - bit module for measuring power parameters, where the positions indicate: 1 - bit, 2 - bit module, 3 - downhole motor, - wireless communication channel, 5 - telemetry system, 6 - drill collars, 7 - drill string, 8 - top sub, 9 - bottom sub, 10 - strain gauge, 11 - electronic unit with a transmitting module, 12 - power supply, 13 - pressure compensator, 14 - start sensor for registration.

The geosteering complex contains a telemetry system 5, which is installed after the drill collars (DC) 6 as part of the drill string 7 above the downhole motor 3. Above the bit 1, a bit-on-bit module 2 is installed to measure power parameters. The results of measuring power parameters are transmitted via wireless communication channel 4 to telemetry system 5.

The near-bit module for measuring power parameters is installed above the drill bit 1 as part of the drill string. The body of the bit module is formed by the upper 8 and lower 9 subs. The use of standard tool joints 3-117 allows you to install the module anywhere in the drill string. In the lower part of the sub 9, a strain gauge 10 is made with strain gauges glued to its inner surface to measure the axial load, torque and bending moment. The bending moment is measured in two mutually perpendicular directions, which makes it possible to determine the vector of the total action of the bending moment on the bit. The internal cavity of the strain gauge 10 is filled with an inert liquid and the channel communicates with the pressure compensator. Blocks electronic 11 and power supply 12 are installed inside the module case in a special container on shock absorbers. The start of the near-bit module for measurement is carried out by sensor 14, which is triggered by a pressure drop across the drilling tool. The measurement results are transmitted wirelessly to the telemetry system 5 using a transmitter module located in the electronic unit 11.

The geosteering complex with a downhole device for measuring power parameters works as follows: during drilling, the near-bit module 2 measures the power parameters of the bottom of the drill string: axial load, torque and bending moments, stores them in its own non-volatile memory and transmits them to the telemetry system 5 wirelessly communication channel 4. Telesystem 5 transmits to the surface the results of measurement of force parameters together with the results of inclinometric measurements. On the surface, the computer software of the processing and visualization unit builds in the polar coordinate system a graph of the total action of the bending moment over the sectors of the bottom hole depending on the axial load on the bit and combines it with the position of the deflector determined from the inclinometry data.

Claims (1)

A geosteering complex with a downhole device for measuring force parameters, containing a processing and visualization unit in the form of a computer connected to a monitor, a downhole telemetry system located in close proximity to the downhole motor, a means for inclinometric measurements, characterized in that it is equipped with a bit-on-bit module for measurement of force parameters, located directly above the bit, with a sensor for starting the above-bit module for measurement, triggered by a pressure drop on the drilling tool, while the body of the above-bit module is formed by the upper and lower subs, in the lower part of the lower sub there is a strain gauge with strain gauges glued to its inner surface , the internal cavity of the strain gauge is filled with an inert liquid and the channel communicates with the pressure compensator, inside the housing in a container on shock absorbers there is a power supply unit and an electronic unit with a transmitting module connected by a wireless channel with a telemetry system, configured to transmit to the surface the results of measurements of force parameters along with the results inclinometric measurements.