CN215890010U - Position measuring device - Google Patents

Abstract

The utility model discloses a position measuring device, comprising: the short section tandem, the receiving and transmitting unit, the control unit and/or the signal acquisition unit are used for penetrating a high-curvature well section with a curvature radius within a preset range, and detecting the position relation between the instrument accommodating well and a target well; the nipple tandem includes: at least one receiving and dispatching short section and a plurality of transmission short sections which are connected in a hinged mode; the receiving and transmitting short section is provided with a signal receiving and transmitting unit for receiving and transmitting detection signals; the device also comprises a control unit and/or a signal acquisition unit, wherein the control unit is used for controlling the signal transceiving unit to transmit signals, and the signal acquisition unit is used for acquiring detection signals received by the signal transceiving unit; and the plurality of transmission short sections are used for serially connecting high-trafficability short section series or connecting the receiving short section and the receiving short section. The utility model can realize the operation of double parallel wells or communicated wells in the high-curvature well section and the extension well section thereof.

Description

Position measuring device

Technical Field

The utility model relates to the technical field of oil and gas exploration, in particular to a position measuring device.

Background

The development of underground resources requires the use of downhole instruments to communicate one well with another or to drill one well parallel to another. The prior art can be directed to vertical wells, deviated wells, branched wells for communicating wells or dual parallel well drilling. However, the existing communicated well instrument or double parallel well instrument cannot pass through a high-curvature well section or branch well section with a curvature radius smaller than 30 meters, particularly cannot pass through an extremely short-radius well section with a curvature radius smaller than 10 meters or an extremely short-radius branch well section, so that the operation of the communicated well or double parallel wells of a high-curvature well bore is limited, the difficulty is increased, and the development and evaluation of resources beside the well are hindered. The main application in the double parallel wells described in the technical background is in the double horizontal wells, with a large number of applications in thick oil development. The utility model mainly solves the technical problem of realizing parallel drilling of a certain high-curvature branch well and another target well, and the technology can realize a plurality of high-curvature branch wells which are parallel to each other and contact with a reservoir layer to the maximum extent in the process of geothermal exploitation and other underground resource development. In addition, the technology can also realize the communication between a certain high-curvature branch well and other well bores.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a position measuring device which is used for realizing the communication operation of a high-curvature branch well and a target channel or the drilling operation of double parallel wells. Can improve the economic benefits of underground resources development, reduce the operation degree of difficulty of construction well section, the device includes:

the pup joint tandem, the control unit and/or the signal acquisition unit are used for penetrating a borehole with the curvature radius within a preset range;

the pup joint string comprises: at least one receiving and transmitting short section and a plurality of transmission short sections which are connected in an articulated mode;

the receiving and transmitting short section is provided with a signal receiving and transmitting unit for receiving and transmitting detection signals;

the control unit and/or the signal acquisition unit are electrically connected with the signal transceiving unit through a cross-over measurement circuit, and are used for controlling the signal transceiving unit to transmit signals when the control unit and/or the signal acquisition unit is the control unit, and are used for acquiring detection signals received by the signal transceiving unit when the control unit and/or the signal acquisition unit is the signal acquisition unit;

the system also comprises a position calculating unit, the relative position relation between the target well and the instrument containing well can be calculated by utilizing the collected detection signals, and the position calculating unit is connected with the control unit and/or the signal collecting unit through communication lines.

Optionally, the apparatus further comprises: the drill string is arranged above the nipple string and used for conveying the nipple string into the well hole;

the receiving short sections are used for receiving the control unit and/or the signal acquisition unit and are connected in series at any position in the short section serial in a hinged mode, or the receiving short sections are arranged above the short section serial or below the short section serial;

the drill string is arranged in the main well bore and used for conveying a short section string arranged at the lower end of the drill string into the branch well, the length of the short section string is greater than the axial length of a section to be measured in the branch well section, the branch well section comprises a high-curvature deflecting well section and an extension well section thereof, and the curvature radius range of the high-curvature deflecting well section is 0-60 m.

Optionally, at least one receiving short section is used for receiving the position calculating unit, and the receiving short section for receiving the position calculating unit is connected in series to any position in the short section series in a hinged manner, or the receiving short section for receiving the position calculating unit is arranged above the short section series, or the receiving short section for receiving the position calculating unit is arranged below the short section series;

the axial length of the receiving and sending short section, the accommodating short section and the conveying short section is less than or equal to 5 times of the outer diameter of the conveying short section.

Optionally, the apparatus further comprises: the lower communication circuit, the jumper wire, the upper communication circuit and the mud pulser are electrically connected in sequence;

the lower communication circuit is electrically connected with the control unit and/or the signal acquisition unit;

the lower communication circuit is used for transmitting detection signals from the control unit and/or the signal acquisition unit to the upper communication circuit through the jumper line and transmitting the detection signals to a slurry pulser arranged above the short section serial through the upper communication circuit;

the mud pulser is used for sending detection signals to a receiving end at the wellhead through a drill string.

Optionally, the apparatus further comprises: the beacon is arranged in the target well, a transducer, a motor, a magnet, a coil or an antenna is arranged in the beacon, and the beacon can transmit an acoustic signal, an electric field, a magnetic field or an electromagnetic wave and can assist the position measuring device in detecting information of the target well.

Optionally, the signal transceiver unit includes: at least two transceiver coils for transmitting and/or receiving signals in the form of electromagnetic waves;

and each transmitting and receiving coil is arranged on a corresponding position measuring device on the transmitting and receiving short section.

Optionally, the signal transceiver unit includes: at least two transducers, which transmit and/or receive signals in the form of sound waves;

and each transducer is arranged on a corresponding position measuring device on the transceiver short section.

Optionally, the electromagnetic wave receiving device comprises at least one electromagnetic wave transmitting unit and at least two electromagnetic wave receiving units; the electromagnetic wave transmitting unit is used for generating an electromagnetic field and generating an induction signal on a metal casing or a metal drilling tool in a target well, and the electromagnetic wave receiving unit is used for receiving a signal fed back by the metal casing or the metal drilling tool in the target well;

the electromagnetic wave transmitting unit comprises a transmitting coil, and the electromagnetic wave receiving unit comprises an electromagnetic wave receiving coil.

Optionally, the signal transceiving unit includes an electrode, and transmits and/or receives signals in the form of transmitting and receiving current;

the position measuring device comprises at least two signal transceiving units carrying electrodes.

Optionally, the device comprises a plurality of control units and/or signal acquisition units electrically connected to each other;

the plurality of control units and/or signal acquisition units are used for cooperatively controlling the plurality of signal transceiving units.

Optionally, the apparatus further comprises: and the elastic piece penetrates through the short section serial and is used for enabling the receiving and transmitting short sections to be in a coaxial state.

Optionally, the apparatus further comprises: and the attitude measurement unit is arranged on the receiving and transmitting short section and/or the accommodating short section.

Optionally, the attitude measurement unit includes: the system comprises at least one accelerometer and one magnetometer, wherein the accelerometer and the magnetometer are arranged on the axis of the transceiver sub and used for measuring the inclination angle and the azimuth angle of the transceiver sub.

Optionally, the control unit and/or the signal acquisition unit are prepared by a thick film circuit process.

Optionally, in the pup joint string, the maximum deflectable angle between the axes of two adjacent pup joints is controlled by two adjacent pup joints through a structural dead point of the hinge structure, and when the position of the structural dead point between two adjacent pup joints is reached, the maximum deflectable angle is 2-10 degrees.

The embodiment of the utility model also provides a position measuring method, which is used for measuring the relative position relation between the target well and the instrument containing well, improving the economic benefit and reducing the operation difficulty of the construction well section and comprises the following steps:

passing a pup joint string with a position measurement function through a borehole with a radius of curvature within a preset range, the pup joint string comprising: at least one receiving and transmitting short section and a plurality of transmission short sections which are connected in an articulated mode;

the control unit and/or the signal acquisition unit on the accommodating short section are/is used for controlling the signal receiving and transmitting unit to transmit signals; the detection signal is reflected by the target well or generates electromagnetic induction with the target well;

acquiring the detection signal received by the signal transceiving unit by using the control unit and/or the signal acquisition unit;

and the position calculating unit judges the relative position relationship between the instrument dissolving well and the target well according to the signals acquired by the control unit and/or the signal acquisition unit.

In the embodiment of the utility model, the plurality of receiving and transmitting short sections, the plurality of accommodating short sections and the plurality of conveying short sections which are connected in a hinged manner are arranged, so that the short sections can smoothly penetrate through a borehole with a curvature radius within a preset range in a serial mode, the subsequent position measurement operation is smoothly carried out, the economic benefit is improved, and the operation difficulty of a construction well section is reduced. The signal receiving and transmitting unit is arranged on the receiving and transmitting short section, so that the detection signals can be received and transmitted. Through setting up the control unit and/or signal acquisition unit, can control signal transceiver unit transmission signal to and gather the detection signal that signal transceiver unit received, guarantee going on smoothly of position measurement operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:

FIG. 1 is a schematic view of a position measuring device detecting a target well being drilled in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a position measuring device for detecting a drilled target well according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a position measuring device according to an embodiment of the present invention;

FIG. 4 is a first partial schematic view of a position measurement device in an embodiment of the utility model;

FIG. 5 is a second partial schematic view of a position measuring device in accordance with an embodiment of the present invention;

FIG. 6 is a third partial schematic view of a position measuring device in an embodiment of the present invention;

FIG. 7 is a fourth partial schematic view of a position measuring device in an embodiment of the present invention;

fig. 8 is a schematic diagram of a beacon operating state of a position measuring device according to an embodiment of the present invention.

The reference numbers are as follows:

1, a short conveying section is conveyed,

2, a short section is arranged in the containing groove,

3, receiving and sending the short section,

4 a signal receiving and sending unit for receiving and sending signals,

5 a signal acquisition unit is arranged on the base,

6 a lower communication circuit is arranged on the lower part of the device,

7 the line is bridged by a jumper wire,

8 a communication circuit is arranged on the base station,

9 a mud pulse machine,

10 are connected across the measuring line or lines,

11-a tuning circuit for the electronic circuit,

12 of a torque-transmitting structure, and,

13 the ball head is arranged at the back of the ball head,

14 a ball and socket,

15 of the torque-transmitting pins, and 15 of the same,

16 of the torque-transmitting grooves are formed,

17 of the elastic member, and a spring member,

the guide pipe nipple of 18 is guided to the drill pipe nipple,

19 a position-resolving unit for determining the position of the object,

at the 20-point beacon, the beacon is,

an X drill string is arranged in the drill pipe,

y short sections are connected in series.

A instrument accommodating well

B target well

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

In a first aspect, an embodiment of the present invention provides a position measurement apparatus, as shown in fig. 3, the apparatus includes: the short section string Y is used for penetrating a borehole with a curvature radius within a preset range, the signal transceiving unit 4 and the control unit and/or the signal acquisition unit 5. Wherein, the nipple tandem includes: at least one transceiver sub 3 and a plurality of transfer subs 1 connected in an articulated manner. And the transceiving short section 3 is provided with a signal transceiving unit 4 for transceiving detection signals. At least one holding nipple 2 is used for holding the control unit and/or the signal acquisition unit 5, and holding nipple 2 concatenates in nipple tandem Y optional position with articulated mode, or, holding nipple 2 sets up in nipple tandem Y's top, or, holding nipple 2 sets up in nipple tandem Y's below. The accommodating short section 2 is provided with a control unit and/or a signal acquisition unit 5, and the control unit and/or the signal acquisition unit 5 is electrically connected with the signal transceiving unit 4 through a cross-over measuring line 10;

when the control unit and/or the signal acquisition unit 5 is a control unit, the control unit and/or the signal acquisition unit 5 is used for controlling the signal transceiver unit 4 to transmit a detection signal, and when the control unit and/or the signal acquisition unit 5 is a signal acquisition unit, the control unit and/or the signal acquisition unit is used for acquiring a feedback signal received by the signal transceiver unit 4 from another target well B;

still including position calculating unit (19), can utilize the detection signal of gathering to calculate the relative position relation of target well (B) and instrument holding well (A), position calculating unit (19) and the control unit and/or signal acquisition unit (5) adopt communication line to be connected, position calculating unit (19) and control unit and/or signal acquisition unit (5) can set up inside same holding nipple joint, also can separately set up. In this embodiment, the position calculating unit (19) and the control unit and/or the signal acquisition unit (5) are disposed in different short sections.

It should be noted that the borehole includes a main borehole and a branch borehole, the pup joint string Y, the signal transceiver unit 4, and the control unit and/or the signal acquisition unit 5 are used for passing through a borehole with a radius of curvature within a preset range, that is, for sequentially passing through the main borehole and the branch borehole with a radius of curvature within a preset range (mainly, the junction of the main borehole and the branch borehole is passed through by using the flexibility of the hinge structure, and the junction may be specifically referred to as a separation curve between the main borehole and the branch borehole in fig. 1).

When the accommodating short section 2 is connected in series in the short section serial Y in a hinged mode, the length of the accommodating short section 2 is required to be generally consistent with the length of the receiving and transmitting short section 3 or the length of the transmission short section 1. When the containing short section 2 is arranged above the short section serial Y, the length of the containing short section 2 is not limited.

In specific operation, as shown in fig. 1, the drilled borehole is an instrument-accommodating well a, the borehole being drilled is a target borehole B, the position measuring device may be disposed in the drilled borehole a, and the position measuring device may be used to detect the form of the drilled target borehole B or a metal drilling tool, so as to further obtain the relative position relationship between the target borehole B and the instrument solute well a. As shown in fig. 2, the drilled borehole is a target borehole B, the borehole being drilled is an instrument-receiving well a, and the position measuring device is connected behind the guided drilling nipple 18 to directly detect the target borehole B during the drilling of the branch well. And (3) enabling a plurality of receiving and transmitting short sections 3, a plurality of containing short sections 2 and a plurality of conveying short sections 1 which are connected in an articulated mode to penetrate through the borehole with the curvature radius within a preset range. And the signal transceiving unit 4 on the transceiving short section 3 is used for transceiving the detection signal. The control unit on the accommodating short section 2 is used for controlling the signal transceiving unit 4 to transmit detection signals, the signal acquisition unit 5 is used for acquiring the detection signals received by the signal transceiving unit 4 through the cross-over measurement circuit 10, specifically, when the control unit and/or the signal acquisition unit 5 is the control unit, the signal transceiving unit 4 is controlled to transmit signals, and when the control unit and/or the signal acquisition unit 5 is the signal acquisition unit, the detection signals received by the signal transceiving unit 4 are acquired. It should be noted that the pup joint string includes: a plurality of receiving and dispatching short sections 3, a plurality of containing short sections 2 and a plurality of conveying short sections 1 which are connected in a hinged mode. The receiving-transmitting short section 3, the accommodating short section 2 and the conveying short section 1 can be connected according to working requirements, the tail end of the short section serial Y can be connected with drilling equipment, and the head end of the short section serial Y can be connected with a mud pulser 9 at a wellhead. In order to guarantee the detection effect, the receiving-transmitting short joint 3 and the accommodating short joint 2 can be arranged at the position, close to the well bottom, of the branch well section. For example, one accommodating short section is used for accommodating the control unit and/or the signal acquisition unit, and the accommodating short section is arranged below the short section serial;

according to the position measuring device provided by the embodiment of the utility model, the plurality of receiving and transmitting short sections 3, the plurality of accommodating short sections 2 and the plurality of conveying short sections 1 which are connected in a hinged manner are arranged, so that the short section serial Y can smoothly pass through a borehole with the curvature radius within a preset range, the smooth operation of subsequent position measuring operation is ensured, the economic benefit is improved, and the operation difficulty of a construction well section is reduced. The signal receiving and transmitting unit 4 is arranged on the receiving and transmitting short section 3, so that the detection signals can be received and transmitted. By arranging the control unit and/or the signal acquisition unit 5, the signal transmitting and receiving unit 4 can be controlled to transmit signals, and detection signals received by the signal transmitting and receiving unit 4 can be acquired, so that smooth position measurement operation is guaranteed.

Wherein, the function of a plurality of transmission nipples 1 is to form the nipple tandem Y in a series connection mode or to connect a plurality of receiving and transmitting nipples 3. The number of the receiving and transmitting short sections 3 is at least two, so that an array detection system is formed, and the position measurement operation precision can be greatly improved.

In addition, the position measuring device comprises at least two control units and/or signal acquisition units 5 which cooperatively control two or more signal transceiving units, and the at least two control units and/or signal acquisition units 5 are electrically connected. It should be noted that, in order to ensure that the detection signal is not disturbed by vibration, the jumper measurement line 10 is fixed to the pup joint string Y by a fixing member.

In addition, the receiving and transmitting unit 3 and the control unit and/or the signal acquisition unit 4 are isolated from each other and arranged at different short joints which are hinged with each other, and the electric connection between the control unit and/or the signal acquisition unit and the signal receiving and transmitting unit is realized through the bridging measurement circuit 10, so that the trafficability of the position measuring device is greatly improved, and the technical feasibility is ensured. Bending moment is isolated in a hinged mode, so that a sensor on the transmission short section 1 is not easy to damage.

In the embodiment of the present invention, the method further includes: the drill string X is arranged above the nipple string Y and used for conveying the nipple string Y into the well; the length of the short section string Y is greater than that of the branch well section.

The drill string is arranged in a main well bore and used for conveying a short section string arranged at the lower end of the drill string into a branch well, the length of the short section string is greater than the axial length of a section to be measured in a branch well section, and the branch well section comprises a high-curvature deflecting well section and an extension well section thereof. The branch well section comprises a high-curvature deflecting well section and an extension well section thereof, and the curvature radius range of the high-curvature deflecting well section is 0-60 m. For example, it may be a short radius well having a radius of curvature of 10m to 60m, or an extremely short radius well having a radius of curvature of 0 to 10 m. The drill string X may be a high rigidity drill string, which may be formed by serially connecting two drill rods made of continuous steel pipes provided with threads. It should be noted that the purpose of the high-curvature deflecting well section is to deviate the extension direction of the branch borehole from the main borehole with as few footings as possible to achieve the preset extension direction. Therefore, during the construction of the short-extremely short radius multilateral well, the curvature radius of the high curvature deflecting well section is between 0 and 60 meters, but the extending well section is often a steady deflecting well section. The present invention is intended to solve the problem of not being able to achieve relative position measurements of a target well within a short-very short radius multilateral well, and therefore must enable the position measurement device to pass through high curvature deviated intervals.

In the application of the branch well, the drill string conveying position measuring device is adopted in the main well bore, so that the length of the short section serial Y can be greatly reduced, and the accident risk is reduced.

Further, the containing short section 2 is connected in series in a short section series Y in a hinged mode, and the length of the axes of the receiving and sending short section 3, the containing short section 2 and the conveying short section 1 is less than or equal to 5 times of the outer diameter of the conveying short section 1.

The signal transceiving unit 4 includes: at least two receiving and transmitting coils which adopt the electromagnetic wave form to transmit and/or receive the signal position measuring device, and each receiving and transmitting coil is arranged on a corresponding receiving and transmitting short section 3. As a more preferable configuration, the receiving nipple 2 is further provided with a tuning circuit, and the tuning circuit is used for driving the transceiver coil to transmit or receive electromagnetic waves. The tuning circuit may be a tuning circuit board, which comprises at least a capacitor, which can form an oscillating circuit with a transmitting or receiving coil, which can excite an electromagnetic wave. It should be noted that, because every transceiver coil all sets up on a corresponding transceiver nipple 3, and all have between every two adjacent signal transceiver nipples 3 and predetermine the interval, through so setting up, can guarantee position measurement's effect, and then pass high camber well and realize array electromagnetic wave induction detection or array induction detection. Specifically, the device comprises at least one electromagnetic wave transmitting unit and at least two electromagnetic wave receiving units; the electromagnetic wave transmitting unit and the electromagnetic wave receiving unit are respectively arranged in different signal transceiving short sections 3, the electromagnetic wave transmitting unit is used for generating an electromagnetic field and generating an induction signal on a metal casing pipe or a metal drilling tool in a target well, and the electromagnetic wave receiving unit is used for receiving a signal fed back by the metal casing pipe or the metal drilling tool in the target well;

the electromagnetic wave transmitting unit comprises a transmitting coil, and the electromagnetic wave receiving unit comprises an electromagnetic wave receiving coil. The electromagnetic wave transmitting and/or receiving coil and the electromagnetic array probe used as the passing-by type are used for detecting the metal casing or the metal drilling tool in the target well, the space position relation resolving principle is the prior art, and the details are not repeated in the utility model.

The signal transceiving unit 4 includes: at least two transducers, which are used for transmitting and/or receiving signals in the form of sound waves, and each transducer is arranged on a corresponding transceiver short section 3. The transducer is preferably a piezoelectric ceramic or magnetostrictive transducer position measuring device. When the signal transceiver unit 4 is used for acoustic detection, the signal transceiver unit 4 is a transducer and is used for transmitting or receiving an acoustic signal, the articulated short section needs to be sent into a branch well section first, acoustic detection is realized in the reverse pulling-out process, a partial schematic diagram of the position measuring device at this time can be seen in fig. 7, and the signal transceiver unit 4 in fig. 7 is the transducer at this time. It should be noted that, because every transducer all sets up on a corresponding receiving and dispatching nipple joint 3, and all have between every two adjacent receiving and dispatching nipple joints 3 and predetermine the interval, through so setting up, can guarantee the effect of array detection, and then pass high camber well and realize array sound detection, especially realize reflection sound through a plurality of receiving and dispatching nipple joints 3 that are provided with the transducer and survey. And judging the relative position relationship between the instrument accommodating well A and the target well B through the reflected signal of the target well B.

The signal transceiving unit 4 may comprise electrodes for transmitting and/or receiving signals in the form of transmitting and receiving currents, and the position measuring device comprises at least two signal transceiving units 4 carrying electrodes.

The control unit and/or the signal acquisition unit 5 may be a control circuit board and/or a signal acquisition circuit board. Based on the characteristics of the thick film circuit, such as low noise, high stability and the like, the control unit and/or the signal acquisition unit 5 can be prepared by adopting a thick film circuit process.

In the short section serial Y, the maximum deflectable angle between the axes of two adjacent short sections is controlled by two adjacent short sections through a structural dead point of a hinged structure, and when the position of the structural dead point between two adjacent short sections is reached, the maximum deflectable angle is 2-10 degrees. It should be noted that the dead point position of the structure is an angular position at which the active spaces of the input end and the output end of the hinge structure are used up. The larger the preset maximum deflectable angle value is, the better the trafficability of the pup joint string Y is, but the easier buckling occurs, so that the preset maximum deflectable angle value can meet the curvature of a well section through which an instrument can pass.

In the embodiment of the present invention, the hinge structure used between any two short joints may be a universal joint and a joint structure capable of transmitting axial force, for example, a universal joint capable of transmitting axial force, or a combination of any universal joint and a spherical hinge. The universal energy-saving function of the universal cross shaft can be realized by transmitting axial force and realizing universal transmission, and the function of being equal to hinging is realized.

As shown in fig. 3 and 5, the joint structure includes: a ball 13 and a socket 14. A torque transmission 12 is also provided between the ball 13 and the socket 14, the ball 13 being pivotable in the socket 14. The torque transmission structure 12 includes a torque transmission pin 15 and a torque transmission groove 16, the torque transmission pin 15 is disposed on the outer side of the ball 13, the torque transmission groove 16 is disposed on the inner side of the ball socket 14, or the torque transmission pin 15 is disposed on the inner side of the ball socket 14, and the torque transmission groove 16 is disposed on the outer side of the ball 13; the torque transfer pins 15 may be spherical, cylindrical; the torque transmission structure 12 is not limited to the form of the torque transmission pin 15 and the torque transmission groove 16, and does not exclude the case where torque is transmitted by means of teeth, grooves, or the like.

In order to avoid entering the branch well section when transferring with the equipment that nipple joint tandem head end is connected to send the card and pause, influence normal detection operation, can set up the length that the nipple joint is listed as being greater than the length of branch well section.

In the embodiment of the present invention, in order to ensure that the detection data is successfully transmitted to the well, as shown in fig. 3 and 5, the apparatus further includes: a lower communication circuit 6, a jumper circuit 7, an upper communication circuit 8 and a mud pulser 9 which are electrically connected from bottom to top. Wherein, the lower communication circuit 6 is electrically connected with the control unit and/or the signal acquisition unit 5. The lower communication circuit 6 is used for transmitting detection signals from the control unit and/or the signal acquisition unit 5 to the upper communication circuit 8 through the jumper 7, and transmitting the detection signals to the slurry pulser 9 arranged above the short section string Y through the upper communication circuit 8. The mud pulser 9 is used to send the detection signal through the drill string X to the receiving end at the wellhead. In this application, "up" refers to the uphole direction and "down" refers to the downhole direction.

In specific implementation, the detection signal acquired by the lower communication circuit 6 can be transmitted to the mud pulser 9 in the main borehole through the jumper 7 and the upper communication circuit 8, and the mud pulser 9 transmits the signal to the signal receiving end of the wellhead.

In order to complete the power supply and control of the downhole equipment, as shown in fig. 3 and 6, the apparatus further comprises: and the power supply unit 9 is arranged in the main borehole and is electrically connected with the upper communication circuit 8.

The power supply unit 9 may be connected in series to any position in the driving drill string, or connected to the upper end of the driving drill string, and may be a battery cartridge short section with an underground battery arranged therein, or may be an underground turbine generator.

Further, the lower communication circuit 6 includes a signal modulation circuit. The upper communication circuit 8 includes a signal demodulation circuit. The jumper lines 7 are used to transfer power and signals.

In specific implementation, the signal modulation circuit can load detection data into the jumper line 7 through alternating current components; the signal demodulation circuit can separate the signal from the jumper wire 7, the signal modulation circuit modulates the transmitted information into a form which is easy to be superposed on the power supply signal, the circuit modulation mode includes but is not limited to frequency modulation, amplitude modulation, phase modulation and pulse modulation, and the modulated signal is superposed on the power supply signal in the jumper wire; the signal demodulation circuit is arranged above or on the upper part of the short section serial, and can pick up the modulation component carrying information on the jumper 7 and demodulate the picked modulation component according to a modulation mode to form a digital signal which can be processed by the mud pulser. The mud pulser 9 further transmits the digital signal to a signal receiving end of the wellhead in the form of a mud pulse wave.

In the embodiment of the present invention, when the pup joint string needs to be lifted to the well, and then the detection data is acquired, the apparatus further includes: and a data storage unit. The data storage unit is electrically connected with the signal acquisition unit 5 and is used for storing the detection signals acquired by the signal acquisition unit 5.

Wherein the data memory comprises at least a memory chip.

In order to avoid the interference of vibration on the measurement and to increase the service life of the jumper 10, the control unit and/or the signal acquisition unit 5 can be connected to a tuning circuit 11 via the jumper 10, the jumper 10 being fixed to the stub string by a fixing element, and the tuning circuit being able to generate an electrical signal of a predetermined frequency and strength and to emit it in the form of an electromagnetic wave via a transmitter coil. See fig. 3 and 4.

For example, to facilitate installation and removal, the jumper measurement line 10 may be secured to the pup string by a bolt assembly.

Further, in order to improve the stability of the pup joint string in the branch well section, as shown in fig. 3 and 5, the device further comprises: and an elastic member 17. The elastic member 17 penetrates the short section string Y and is used for enabling the plurality of transceiving short sections 3 to be in a coaxial state. The elastic member 17 may be an elastic rod or an elastic tube.

In an embodiment of the present invention, the apparatus further includes: an attitude measurement unit. The attitude measurement unit is arranged on the receiving-transmitting short joint 3 and/or the accommodating short joint 2.

Specifically, the attitude measurement unit includes: the system comprises at least one accelerometer and one magnetometer, wherein the accelerometer and the magnetometer are arranged on the axis of the transceiver sub 3 and are used for measuring the inclination angle and the azimuth angle of the transceiver sub 3.

During specific implementation, the attitude measuring unit can measure the inclination angle and/or the gravity tool face angle and/or the magnetic tool face angle of the high-flexibility detecting instrument underground and can provide the gravity tool face angle and/or the magnetic tool face angle information for the position measuring device, and the attitude measuring unit comprises at least one magnetometer and is made of nonmagnetic materials to form an accommodating short section nearby the magnetometer. The attitude of each transceiver unit, such as the orientation of a coil or an antenna, can be obtained, the orientation information of the transducer can be obtained, and the measurement error caused by the uncertainty of the orientation of the coil or the transducer due to the buckling of the pup joint array can be solved.

In order to avoid that two adjacent nipples are nipples with longer length and are difficult to pass through the main well and the branch well section, the distance between the two adjacent nipples can be enabled to have a preset difference value in a nipple string. Wherein, two adjacent nipples can be: the receiving and transmitting short section 3 and the containing short section 2, the containing short section 2 and the conveying short section 1, and the receiving and transmitting short section 3 and the conveying short section 1.

Specifically, for example, receiving and dispatching nipple 3, holding nipple 2 and conveying nipple 1 are connected in order, and the length of holding nipple 2 is 5m, then receiving and dispatching nipple 3 and conveying nipple 1 should all be less than 5m this moment, and as preferred, the length of receiving and dispatching nipple 3 and conveying nipple 1 this moment can set up to 3m-4m, is less than 80% of holding nipple 2 length promptly. The purpose of so setting up, guarantee that two adjacent and have the nipple joint length of test function are not totally longer promptly, avoid influencing the normal use of signal transceiver unit 4, the control unit and/or signal acquisition unit 5 on two nipple joints.

As shown in fig. 8, at least one beacon (20) disposed in the target well (B), the beacon having a transducer, motor, magnet, coil or antenna disposed therein, the beacon being capable of transmitting an acoustic signal, an electric field, a magnetic field or an electromagnetic wave, which can assist the position measuring device in detecting information of the target well; in this embodiment, the pup joint string carrying the signal transceiving unit can determine the spatial position relationship between the multilateral well and the target well (B) by detecting a signal generated by a beacon in the target well (B), when a transducer is arranged in the beacon, the beacon can emit an acoustic signal, the signal transceiving unit is a phased array acoustic signal transceiving unit, and the phased array acoustic signal transceiving unit can calculate the spatial position relationship between the multilateral well and the target well (B) by capturing the acoustic signal emitted by the beacon. In this embodiment, the branch well (a) is an instrument-receiving well.

In a second aspect, an embodiment of the present invention provides a method for performing position measurement by using the above position measurement apparatus, as shown in fig. 1, 2 and 3, the method includes:

step 101, enabling a pup joint string Y with a detection function to pass through a borehole with a curvature radius within a preset range, wherein the pup joint string comprises the following components: at least one receiving and transmitting short section 3 and a plurality of transmission short sections 1 which are connected in an articulated manner;

102, controlling a signal transceiving unit 4 to transmit signals by using a control unit and/or a signal acquisition unit 5 on the accommodating short section 2;

103, acquiring the detection signal received by the signal transceiver unit 4 by using the control unit and/or the signal acquisition unit 5;

and 104, judging the relative position relation between the instrument dissolving well (A) and the target well (B) by the position calculating unit (19) according to the signals collected by the control unit and/or the signal collecting unit (5).

By using the method, the short section string Y can smoothly pass through the main well and the branch well section with the curvature radius within the preset range, the subsequent position measurement operation is smoothly carried out, the economic benefit is improved, and the operation difficulty of the construction well section is reduced.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (15)

1. A position measuring device, comprising: the system comprises a pup joint string (Y) for penetrating a borehole with a curvature radius within a preset range, a control unit and/or a signal acquisition unit (5), and a position calculation unit (19);

the pup joint string comprises: at least one transceiver sub (3) and a plurality of transfer sub (1) connected in an articulated manner;

the signal transceiving unit (4) for transceiving the detection signal is arranged on the transceiving short section (3);

the control unit and/or the signal acquisition unit (5) is electrically connected with the signal transceiving unit (4) through a cross-over measurement line (10), and is used for controlling the signal transceiving unit (4) to transmit signals when the control unit and/or the signal acquisition unit (5) is a control unit, and is used for acquiring detection signals received by the signal transceiving unit (4) when the control unit and/or the signal acquisition unit (5) is a signal acquisition unit;

the system is characterized by further comprising a position calculating unit (19), wherein the relative position relation between the target well (B) and the instrument accommodating well (A) can be calculated by using the acquired detection signals, and the position calculating unit (19) is connected with the control unit and/or the signal acquisition unit (5) through communication lines.

2. The position measurement device of claim 1, further comprising: a drill string (X) arranged above the pup joint string (Y) and used for conveying the pup joint string (Y) into the well hole;

at least one holding nipple joint (2) is used for holding the control unit and/or the signal acquisition unit (5) and is used for holding the control unit and/or the signal acquisition unit (5) the holding nipple joint (2) is connected in series in a hinged mode at any position in the nipple joint serial (Y), or is used for holding the control unit and/or the signal acquisition unit (5) the holding nipple joint (2) is arranged above the nipple joint serial (Y), or is used for holding the control unit and/or the signal acquisition unit (5) the holding nipple joint (2) is arranged below the nipple joint serial (Y).

3. The position measuring device according to claim 2, characterized in that at least one receiving sub (2) is used for receiving the position calculating unit (19), the receiving sub (2) used for receiving the position calculating unit (19) is connected in series at any position in the sub string (Y) in a hinged manner, or the receiving sub (2) used for receiving the position calculating unit (19) is arranged above the sub string (Y), or the receiving sub (2) used for receiving the position calculating unit (19) is arranged below the sub string (Y);

the receiving and sending short section (3), the accommodating short section (2) and the conveying short section (1) are all smaller than or equal to 5 times of the outer diameter of the conveying short section (1).

4. The position measuring device according to claim 2 or 3, further comprising: a lower communication circuit (6), a jumper line (7), an upper communication circuit (8) and a mud pulser (9) which are electrically connected from bottom to top in sequence;

the lower communication circuit (6) is electrically connected with the control unit and/or the signal acquisition unit (5);

the lower communication circuit (6) is used for transmitting detection signals from the control unit and/or the signal acquisition unit (5) to the upper communication circuit (8) through the jumper line (7) and transmitting the detection signals to a mud pulser (9) arranged above the short section string (Y) through the upper communication circuit (8);

the mud pulser (9) is used for transmitting a detection signal to a receiving end at a well head through the drill string (X).

5. The position measurement device of claim 1, further comprising: at least one beacon (20) arranged in the target well (B), wherein a transducer, motor, magnet, coil or antenna is arranged, the beacon can send acoustic signals, electric fields, magnetic fields or electromagnetic waves and can assist the position measuring device to detect the information of the target well.

6. Position measuring device according to claim 1, characterized in that said signal transceiving unit (4) comprises: at least two transceiver coils for transmitting and/or receiving signals in the form of electromagnetic waves;

and each transceiver coil of the position measuring device is arranged on one corresponding transceiver short section (3).

7. Position measuring device according to claim 1, characterized in that said signal transceiving unit (4) comprises: at least two transducers, which transmit and/or receive signals in the form of sound waves;

each transducer is arranged on a corresponding position measuring device on the transceiving short section (3).

8. The position measurement device according to claim 6, comprising at least one electromagnetic wave transmission unit and at least two electromagnetic wave reception units; the electromagnetic wave transmitting unit is used for generating an electromagnetic field and generating an induction signal on a metal casing or a metal drilling tool in a target well, and the electromagnetic wave receiving unit is used for receiving a signal fed back by the metal casing or the metal drilling tool in the target well;

the electromagnetic wave transmitting unit comprises a transmitting coil, and the electromagnetic wave receiving unit comprises an electromagnetic wave receiving coil.

9. Position measuring device according to claim 1, characterized in that the signal transceiving unit (4) comprises electrodes, which transmit and/or receive signals in the form of transmit and receive currents;

the position measuring device comprises at least two signal transmitting and receiving units (4) carrying electrodes.

10. Position measuring device according to claim 1, characterized by comprising a plurality of said control units and/or signal acquisition units (5) electrically connected to each other;

the plurality of control units and/or signal acquisition units (5) are used for cooperatively controlling the plurality of signal transceiving units (4).

11. The position measurement device of claim 1, further comprising: and the elastic piece (17) penetrates through the short section tandem (Y) and is used for enabling the receiving and transmitting short sections (3) to be in a coaxial state.

12. The position measurement device of claim 2, further comprising: and the attitude measuring unit is arranged on the transceiving short section (3) and/or the accommodating short section (2).

13. The position measurement device according to claim 12, wherein the attitude measurement unit includes: the system comprises at least one accelerometer and one magnetometer, wherein the accelerometer and the magnetometer are arranged on the axis of the transceiver sub (3) and are used for measuring the inclination angle and the azimuth angle of the transceiver sub (3).

14. Position measuring device according to claim 1, characterized in that the control unit and/or the signal acquisition unit (5) are manufactured using thick-film circuit technology.

15. Position measuring device according to claim 1, characterized in that in said string of nipples (Y), two adjacent nipples control the maximum angle of deflection between the axes of two adjacent nipples through the structural dead point of the articulated structure, said maximum angle of deflection being between 2 ° and 10 ° when the structural dead point position is reached between two adjacent nipples.

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