CN105089644A - Data transmission system and method for transmitting underground measurement-while-drilling data to ground - Google Patents

Abstract

The invention discloses a data transmission system and method for transmitting underground measurement-while-drilling data to the ground. The data transmission system comprises a drill stem equipped with a well-logging-measurement-while-drilling tool, and a throwing-while-drilling pup joint accommodating a microstorage, wherein the throwing-while-drilling pup joint comprises a housing, a control circuit and a wireless transmit-receive device; the drill stem is sleeved with the housing, and a clearance space is formed between the drill stem and the housing; and under the action of a microstorage release command sent by the control circuit, the throwing-while-drilling pup joint releases the microstorage loaded with the underground measurement data to the ground. The data transmission system for transmitting the underground measurement-while-drilling data to the ground greatly improves the data transmission rate and the communication reliability; and as only slurry is used as a transmission medium of the microstorage, extra cost is not needed, and the normal drilling process is not influenced.

Description

Data transmission system and method for transmitting downhole measurement data while drilling to the surface

technical field

The invention relates to the field of oil and gas development and exploration, in particular to a data transmission system and method for transmitting downhole measurement data while drilling to the ground.

Background technique

With the rapid growth of offshore drilling and the continuous development of horizontal well technology, the application of logging while drilling technology is becoming more and more extensive. The main difference from conventional wireline logging lies in the real-time data acquisition of logging while drilling. That is, formation data are obtained with little or no drilling fluid invasion, and thus are closer to undisturbed formations. Since the test of the formation data is completed while drilling and transmitted to the surface for on-site analysis and interpretation, it not only saves the drilling cycle, but also can guide the drilling, adjust the drilling trajectory and improve the drilling process. Therefore, how the signal at the bottom of the well is transmitted to the surface It is a key link of LWD technology and also one of the "bottlenecks" restricting the development of LWD technology.

At present, there are real-time transmission methods and storage transmission methods for transmitting bottom-hole signals to the ground. The real-time transmission method is to transmit the data of the measurement while drilling to the ground in time through various wired or wireless data transmission methods. This method is very important for guiding drilling, especially geosteering during drilling, but at present, various data transmissions are difficult to meet the requirements of timely and effective transmission of a large amount of downhole data to the surface. The storage transmission method means that the logging-while-drilling data is directly stored in the measurement tool. When the drill is pulled out, when the drilling tool is lifted to the ground, the data is read out through the cable. This method can complete a large amount of data. collection, but the real-time performance is not enough.

In the wired transmission mode, it includes cable transmission mode, optical fiber transmission mode and drill pipe transmission mode. Document 1 ("Research on Intelligent Drill String Information and Power Transmission System, Petroleum Drilling Technology" 2006, 34 (5): 10-13.) discloses the following content: the method of cable while drilling signal transmission is to enter the drill pipe inside Armored cable, which in turn transmits the signal. But along with deepening of drilling depth, when adding a single cable, the cable and the instrument while drilling must be lifted out of the ground, or the cable is inserted in the inner hole of the drill pipe in advance. Document 2 ("New Technology of Data Transmission While Drilling". Petroleum Instruments, 2004, 18 (6): 26-31.) discloses the following content: the optical fiber transmission mode is to put the optical fiber with protective layer into the well, and the optical fiber The bottom-while-drilling instrument is connected to the ground, and then the drilling data is transmitted through the optical fiber. Since fiber optics act like cables, the problems that arise are the same. Document 3 ("The Development Status and Prospects of Rotary Steerable Drilling Technology". Petroleum Machinery, 2006, 34(4): 66-70) discloses the following content: the drill pipe transmission method is to install the conductor in the drill pipe so that it becomes a drill pipe As a part of the whole, the special connection module assembled on the drill pipe joint makes the whole drill string form an electrical signal channel, and then realizes data transmission.

Since the above methods adopt wired connection, the advantage is that the transmission speed is very fast, which is much higher than that of the wireless method. However, cables, optical fibers, and special drill pipe connectors all need to be installed on the entire wellbore. During drilling, these wired media are easily damaged due to the high-speed rotation of the drill pipe. Therefore, these existing technologies mostly have the following common disadvantages: poor reliability, relatively complicated manufacturing process, and often affect the normal drilling process. Therefore, the above existing technologies are rarely used in the actual LWD production process.

Wireless transmission methods include mud (ie, drilling fluid) pulses, electromagnetic waves and sound waves. Among them, the mud pulse and electromagnetic wave methods have been applied to the actual LWD production, and the mud pulse method is the most widely used. Patent 1 ("A High-speed Transmission and Launching Device for Measurement While Drilling", Publication No.: 201020298582.3) discloses the following content: The mud pulse signal generator is mainly composed of a discharge valve or a throttle valve. Next, due to changes in the flow rate of drilling fluid flowing into the annulus in the drill string, the pressure wave of the drilling fluid in the drill string will generate a series of pulses. By opening and closing the valve and loading the data on these pulses, the data can be transmitted to the ground. However, the mud wave is equivalent to a mechanical wave, and its modulation method greatly limits the rate. The highest transmission speed reported by the current technology can only reach a few tens of bits per second, which is difficult to meet the rapid upload of downhole measurement data. Patent 2 ("An Electromagnetic Wave Signal Transmission Method and System for Measurement While Drilling", publication number: 102251769A) discloses an electromagnetic wave measurement while drilling method using the formation as the transmission medium or the drill string as the transmission conductor. Specifically, the downhole instrument modulates the measured data onto the electromagnetic wave carrier, and the electromagnetic wave transmitter emits it downhole, and transmits it to the ground through various channels. Then, the ground detector processes the detected electromagnetic wave signal modulated with the measured data The circuit demodulates the measurement data in the electromagnetic wave signal. Document 3 ("Application of Acoustic Wave Transmission Testing Technology in Oilfield". Measurement and Control Technology, 2005, 24(11): 76278) uses sound waves or seismic waves to transmit signals through drill pipes or formations. Specifically, the acoustic wave emission system is installed on the drill pipe, and the system modulates various measurement data onto the acoustic vibration signal. The vibration signal is demodulated. The sound wave transmission is the same as the electromagnetic wave transmission, no mud circulation is required, the realization method is simple and the cost is low. The disadvantage is that the attenuation is too fast, and it is greatly affected by the environment. The low-intensity signal generated by the wellbore and the acoustic and electromagnetic wave interference generated by the drilling equipment make it very difficult to detect the signal, and the transmission speed is slow.

Therefore, there is an urgent need for a fast and low-cost data transmission scheme for transmitting downhole measurement data to the ground to solve the above problems.

Contents of the invention

One of the technical problems to be solved by the present invention is to provide a data transmission system for transmitting downhole measurement data to the ground with fast transmission speed and low cost.

In order to solve the above technical problems, the present invention provides a data transmission system for transmitting downhole measurement data while drilling to the surface, comprising: a drill string equipped with a logging while drilling measurement tool; A throwing sub, which houses the micro memory. The throwing-while-drilling sub-joint includes: a shell set on the outside of the drill string and forming a gap space therebetween; a control circuit arranged in the gap space, which is used to receive and send the MWD The downhole measurement data measured by the well measurement tool; and the wireless transceiver device connected with the control circuit, which is used to write the downhole measurement data received by the control circuit into the micro memory; Under the action of the micro-memory release instruction sent by the control circuit, the drill throwing sub-section releases the micro-memory loaded with the downhole measurement data to the surface.

In one embodiment, a micro-memory release hole is provided on the housing side wall of the throwing-while-drilling sub, wherein the micro-memory loaded with the downhole measurement data is released to the In the annular space between the drill string and the well wall, the micro-memory is returned to the ground following the mud circulation.

In one embodiment, the throwing-while-drilling sub also includes: a power mechanism connected to the control circuit, which acts under the action of the micro-memory release command sent by the control circuit; a micro-memory release mechanism, which can The micro-memory is kept in the first state, and is switched to the second state under the action of the power mechanism, so that the micro-memory loaded with the downhole measurement data can be released to the ring via the micro-memory release hole in space.

In one embodiment, the micro-memory release mechanism includes a micro-memory temporary storage compartment, and when the micro-memory release mechanism is in the first state, the micro-memory temporary storage compartment can temporarily store the micro-memory data loaded with downhole measurement data. memory, when the micro-memory release mechanism is in the second state, the micro-memory temporary storage compartment rotates to communicate with the micro-memory release hole under the action of the power mechanism.

In one embodiment, the throwing-while-drilling sub also includes a micro-memory storage compartment arranged in the gap space, its upper end communicates with the drill string, and its lower end communicates with the micro-memory temporary storage compartment, so that all The micro-memory in the micro-memory storage compartment can enter the micro-memory temporary storage compartment under the action of drilling fluid from the drill string.

In one embodiment, the wireless transceiving device includes a data writing-in-while-drilling data line connected to the control circuit, and a data line connected to the data writing-in-while-drilling line and arranged in the micro-memory storage compartment. The antenna for writing data while drilling is designed to only write downhole measurement data to one grain of micro-memory stored in the micro-memory storage cabin at a time.

In one embodiment, the antenna for writing data while drilling is arranged in a region of the micro-memory storage compartment close to the micro-memory temporary storage compartment.

In one embodiment, the power mechanism includes a motor and a reducer.

In one embodiment, the micro-memory release mechanism further includes: a drilling fluid flow channel, which is set to communicate with the micro-memory storage compartment only in the second state, so that Drilling fluid can enter the micro memory temporary storage compartment to release the micro memory in the micro memory temporary storage compartment to the outside.

In one embodiment, the drilling fluid flow channel is formed as a flow pipe with branch pipes, and the branch pipes communicate with the micro-memory release buffer.

In one embodiment, said micro memory release mechanism is rotated 90 degrees in said second state relative to said first state.

In one embodiment, the control circuit regularly sends micro-memory release instructions.

In one embodiment, the throwing-while-drilling sub also includes: a signal receiving antenna connected to the control circuit, which receives a micro-memory release command from the ground, and transmits the micro-memory release command to the control circuit. in the circuit.

In one embodiment, the signal receiving antenna is an RFID tag antenna, which receives the micro memory release command from the RFID tag on the ground.

In one embodiment, it also includes: a surface receiving device, which receives and processes the downhole measurement data in the micro memory.

In one embodiment, the micro-memory is formed as a sphere or cylinder with a diameter in the range of 5 mm to 50 mm and a thickness in the range of 0.1 mm to 50 mm.

In one embodiment, the amount of data loadable by the micro-memory is in the range of 1 bit to 100 megabits.

According to another aspect of the present invention, there is also provided a method for using the above-mentioned system to transmit downhole measurement data, including: putting a plurality of micro-memory devices into the throwing nipple while drilling; receiving and sending the data while drilling through the control circuit The downhole measurement data measured by the logging measurement tool; the downhole measurement data of the control circuit is written into the micro memory through the wireless transceiver device; under the action of the micro memory release command sent by the control circuit, the The sub is thrown to release the micro-memory loaded with the downhole measurement data to the surface.

Compared with the prior art, one or more embodiments of the present invention may have the following advantages:

The data transmission system for transmitting the downhole measurement data to the surface of the present invention provides the micro memory with the downhole measurement data written to the ground through the throwing sub joint connected with the measurement while drilling tool, and then uploads the downhole measurement data to the ground. This data transmission system greatly improves the data transmission rate and communication reliability, and since only mud is used as the transmission medium of the micro memory, there is no additional cost and no influence on the normal drilling process.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

1 is a schematic diagram of a data transmission system for transmitting downhole measurement data to the ground according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of a throwing sub-joint while drilling according to an embodiment of the present invention;

Figure 3 is an enlarged schematic view showing the A region;

Fig. 4 is a schematic diagram of a micro memory rotation release mechanism in a first state according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of a micro memory rotation release mechanism in a second state according to an embodiment of the present invention;

Fig. 6 is an enlarged schematic view showing the region A'.

In the figures, the same parts are given the same reference numerals. The figures are not drawn to scale.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the directional terms mentioned in the present invention, such as: up and down, are only the directions of the drawings. Therefore, the directions used are only used to better illustrate the present invention, but not to limit the protection scope of the present invention.

Fig. 1 is a schematic diagram of a data transmission system for transmitting downhole measurement data to the surface according to an embodiment of the present invention.

As shown in Figure 1, the data transmission system includes: a drill string 40 connected to the drilling derrick 20 on the ground, on which a logging-while-drilling measurement tool 65 is installed; and a throwing sub while drilling installed on the drill string 40 71, which houses the micro memory 43. Wherein, the drill string 40 includes a longitudinal fluid channel 60 , and the outlet of the longitudinal fluid channel 60 communicates with the water hole 51 of the drill bit 50 . Drilling fluid flows through the longitudinal fluid channel 60 and is used for lubricating the drill bit 50 and flushing cuttings from the water hole 51 . Also, an annular space 201 is formed between the drill string 40 and the borehole wall 70 .

When performing drilling operations, the drilling derrick 20 placed on the ground and the drilling rig 30 arranged at one end of the drill string 40 (near the ground end) are used to drive the drill string 40 to rotate at a high speed, and then the drill string 40 drives the drill bit 50 to quickly drill underground. , to drill a wellbore in the formation. The drill bit 50 then cuts into the various geological formations in the subsurface. After the drill bit 50 cuts into different formations, the downhole measurement-while-drilling tool 65 arranged close to the drill bit 51 measures different geological information. Finally, the wireless transceiver device 63 in the throwing-while-drilling sub 71 writes the acquired downhole measurement data into the micro-memory 43 , and releases the micro-memory 43 loaded with downhole measurement data to the surface through the throwing-while-drilling sub 71 .

Fig. 2 is a schematic structural diagram of a throwing-while-drilling sub 71 according to an embodiment of the present invention.

As shown in Figure 2, the throwing while drilling sub-joint 71 includes: a shell sleeved on the outside of the drill string 40 and forming a gap space therebetween; a control circuit 901 arranged in the gap space, which is used to receive and send The downhole measurement data measured by the drilling and logging measurement tool 65; the wireless transceiver device connected with the control circuit 901, which is used to write the downhole measurement data received by the control circuit 901 into the micro memory. Wherein, the throwing-while-drilling sub 71 releases the micro-memory loaded with downhole measurement data to the ground under the action of the micro-memory release command sent by the control circuit 901 .

In the embodiment shown in FIG. 2 , the casing is fixedly set on the drill string 40 through the drill collar box 701 and the drill collar pin 93 . A micro-memory release hole 46 is provided on the side wall of the casing, wherein the micro-memory loaded with the measured data is released to the annular space between the drill string 40 and the well wall 70 (formation 101) through the micro-memory release hole 46. In the space 201, the micro memory is returned to the ground following the mud circulation. The control circuit 901 receives the downhole measurement data of the logging while drilling measurement tool 65 through the LWD data line 601 .

In addition, the throwing sub-joint 71 while drilling also includes: a power mechanism connected to the control circuit 901, which operates under the action of the micro-memory release command sent by the control circuit 901; a micro-memory release mechanism 47, which can maintain micro-memory (refer to FIG. 4 ), and switch to the second state under the action of the power mechanism, so that the micro-memory loaded with downhole measurement data can be released into the annular space 201 via the micro-memory release hole 46 (refer to FIG. 5 or FIG. 6 ).

In order to further illustrate the above-mentioned micro memory release mechanism 47, please also refer to FIG. 3 . As shown in Figure 3, the micro-memory release mechanism 47 includes a micro-memory temporary storage cabin 48. When the micro-memory release mechanism 47 is in the first state, the micro-memory temporary storage cabin 48 can temporarily store the micro-memory loaded with downhole measurement data, When the micro-memory release mechanism 47 is in the second state, the micro-memory temporary storage compartment 48 is rotated to communicate with the micro-memory release hole 46 under the action of the power mechanism (refer to FIG. 5 or FIG. 6 ).

Furthermore, the throwing-while-drilling sub 71 also includes: a micro-memory storage compartment 42 arranged in the clearance space, its upper end communicates with the drill string 40, and its lower end communicates with the micro-memory temporary storage compartment 48, so that the micro-memory storage compartment 42 in the micro-memory storage compartment 42 The memory can enter the micro memory temporary storage compartment 48 under the action of the drilling fluid 801 from the drill string 40 . In one embodiment, a filter 401 for circulating the drilling fluid 801 and a capillary drainage tube 41 are provided between the micromemory storage cabin 42 and the drill string 40 . The filter 401 can filter out impurities in the drilling fluid 801 , so that the drilling fluid flowing through the micromemory storage compartment 42 will not damage the micromemory.

Because this micro-memory 43 does not go out through the water eye 51, the micro-memory 43 made of transceiver circuit, storage circuit and other auxiliary mechanisms can be made very small. Preferably, the micro-memory 43 can be formed as a sphere or cylinder with a diameter in the range of 5mm-50mm and a thickness in the range of 0.1mm-50mm. Also, the data storage capacity of the micro memory 43 is in the range of 1 bit to 100 megabits.

The micro memory 43 in this embodiment is designed as a sphere with a diameter of only 1.2 cm and a thickness of only 0.2 cm. In this way, the volume of 1000 spheres is only about 226cm3, which can be well loaded on the tool while drilling. And, each micro-memory in this embodiment can load the data of 8KBytes, can load the data of 8MBytes altogether like this. Compared with mud pulse transmission, the amount of data that can be uploaded to the ground by the embodiment of the present invention is very large.

In addition, those skilled in the art can increase or decrease the number of micro-memory according to the amount of data to be uploaded. It is also possible to design the micromemory 43 to be larger, so that a higher throughput can be achieved. Or it is also possible to increase the data transmission capacity by cascading multiple throwing subs while drilling.

As for the working mode of the micro-memory, it can be a power supply mode or a power supply mode, which is not limited.

In addition, as shown in FIG. 3 , the micro-memory release mechanism 47 also includes: a drilling fluid flow passage 49, which is set to communicate with the micro-memory storage compartment 42 only in the second state, so that through the drilling fluid flow passage 49 Drilling fluid can enter the micro-memory temporary storage compartment 48 to release the micro-memory in the micro-memory temporary storage compartment 48 to the outside.

In the embodiment of the present invention, the drilling fluid flow passage 49 is formed as a flow pipe with branch pipes, and the branch pipes communicate with the micro memory release temporary storage chamber 48 . As shown in FIG. 3 , more preferably, the drilling fluid passage 49 can be formed as a structure in which branch pipes are perpendicular to the main pipe, which is roughly T-shaped. Furthermore, the micro memory release mechanism 47 is rotated by 90 degrees in the second state relative to the first state.

In the embodiment of the present invention, the wireless transceiver device 63 includes a data writing-in-while-drilling data line 44 connected to the control circuit 901 , and a data-while-drilling The data write-in antenna 45 and the data-while-drilling write-in antenna 45 are designed to only write downhole measurement data to one grain of micro-memory stored in the micro-memory storage cabin 48 at a time. Moreover, the antenna 45 for writing data while drilling is arranged in the area of the micro-memory storage compartment 42 close to the micro-memory temporary storage compartment 48 .

However, the above is only an example, and the wireless transceiver device 63 may also use other wireless communication transmission methods to write downhole measurement data into the micro memory, such as WiFi, Bluetooth or Zigbee. Since the transmission speed of this wireless communication transmission method is several orders of magnitude higher than the transmission speed of mud pulse, electromagnetic wave and acoustic wave, it can ensure fast and accurate transmission of real-time downhole data.

In one embodiment, the same downhole measurement data can also be written into multiple micro memories 43 . In this way, if the data inside a certain micro-memory 43 cannot be acquired or processed by the ground receiving device 12, then by acquiring or processing the data of other micro-memory loaded with the same data, the problem of missing data upload can be solved .

In addition, as shown in Figure 2, the power mechanism includes: a motor 511 connected with the control circuit 901, which generates rotational power according to the micro memory release instruction of the control circuit 901; connected with the motor 511, and arranged at the lower end of the micro memory release mechanism 47 The reducer 501 cooperates with the motor 511 to make the micro-memory release mechanism 47 rotate a certain angle so as to switch from the first state to the second state. In this embodiment, the control circuit 901 controls the execution action of the motor 511 through the motor control signal line 52 . Moreover, the battery 92 provided on the side of the control circuit 901 supplies power to the motor 511 and the control circuit 901 through the motor power line 53 and the control circuit power line 91 respectively.

In one embodiment of the present invention, the throwing sub-joint 71 while drilling also includes: a signal receiving antenna 301 (its two ends respectively have sealing rings 73) connected to the control circuit 901, which receives micro-memory release instructions from the ground, And transmit the micro memory release instruction to the control circuit 901.

Preferably, the signal receiving antenna is an RFID tag antenna, which receives the micro memory release command from the RFID tag on the ground. Of course, in one embodiment, the control program may be preloaded in the control circuit 901, so that the control circuit 901 sends the micro memory release instruction at regular intervals.

Next, the working process of the data transmission system of this embodiment will be described with reference to FIG. 4 to FIG. 6 . It should be noted that, in this embodiment, the throwing-while-drilling sub 71 sequentially releases the micro-memory one by one. It is easy to understand that in other embodiments, micro-memory with a set number of grains can also be sent out together.

During the drilling operation, if the downhole measurement data needs to be uploaded to the ground, the staff or the ground throwing device will drop information tags, such as RFID tags, into the downhole. When the RFID tag passes through the signal receiving antenna 301, the signal receiving antenna 301 obtains the micro memory release instruction from the RFID tag. After the control circuit 901 receives the micro-memory release instruction from the signal receiving antenna 301, it uses the data-while-drilling data writing line 44 and the data-while-drilling antenna 45 to write data while drilling to the micro-memory 43 in the micro-memory storage cabin 42. write operation.

The micro-memory stored in the micro-memory storage compartment 42 is pushed downward by the pressure generated by the drilling fluid passing through the filter 401 and the drainage pipe 41, and then the micro-memory 43 loaded with downhole measurement data is pushed to the micro-memory release mechanism 47 In the temporary storage compartment 48 of the micro-memory (the first state shown in FIG. 4 ).

Specifically, in the above process, part of the drilling fluid flow 801 in the drill string 40 passes through the filter 401 arranged on the side wall of the casing, and flows through the capillary drainage tube 41 connected to the filter 401 to generate capillary pressure, and then the The bottommost micro-memory in the micro-memory storage compartment 42 is pushed into the temporary storage compartment 48 of the micro-memory.

Subsequently, the micromemory release mechanism 47 is rotated at a certain angle under the action of the power mechanism, so as to align the micromemory temporary storage compartment 48 inside it with the micromemory release hole 46 .

Specifically, in this stage, the control circuit 901 controls the motor 511 so that the motor 511 generates power, and the micro memory release mechanism 47 is rotated 90 degrees clockwise through the cooperation of the motor 511 and the reducer 501 (as shown in FIG. 4 Arrow z), and then the mouth of the internal micro memory release temporary storage compartment 48 is aligned with the micro memory release hole 46 (as shown in Figure 5).

Finally, the drilling fluid flow 801 in the drill string 40 enters the temporary storage compartment 48 of the micro storage unit through the filter 401, the capillary drainage tube 411, the micro storage compartment 42, and the drilling fluid passage 49, and the formed pressure can push the micro storage unit 43 Push from the micro memory release hole 46 into the annular space 201 (as shown in FIG. 6 ), so that the micro memory 43 rotates and returns to the ground following the mud circulation.

It should be noted that, since the mud is only used as the carrier of the micro-memory 43 here, and the downhole data is not modulated onto the mud pulse wave, the data transmission speed is greatly improved without increasing the cost. Moreover, since the micro-memory 43 is released according to the loading sequence of the measurement data, the continuous output and real-time performance of the measurement data can be guaranteed.

Finally, the control circuit 901 controls the action of the motor 511, and through the cooperation of the motor 511 and the speed reducer 501, the micro-memory release mechanism 47 is reversely rotated (counterclockwise here) by 90 degrees, and then it is ready for the next micro-memory release operation. Prepare.

In summary, the data transmission system for transmitting downhole measurement data to the surface in the embodiment of the present invention releases the micro memory loaded with downhole measurement data to the surface through the throwing nipple connected with the measurement while drilling tool. Then the downhole measurement data is uploaded to the surface. This data transmission system greatly improves the data transmission rate and communication reliability, and since only mud is used as the transmission medium of the micro memory, there is no additional cost and no influence on the normal drilling process.

The above is only a specific implementation case of the present invention, and the scope of protection of the present invention is not limited thereto. Any skilled person familiar with the technology should modify or replace the present invention within the technical specifications described in the present invention. Within the protection scope of the present invention.

Claims (18)

1. transmit the data transmission system of While-drilling down-hole measurement data to ground, comprising:

The drill string of well logging during survey tool is installed; With

Be arranged on and described drill string throws pipe nipple with brill, it accommodates microstorage, describedly throws pipe nipple comprise with boring: be sleeved on the outside of described drill string and define the housing of clearance space betwixt; Be arranged on the control circuit in described clearance space, it is for receiving and sending the underground survey data that the measurement of described well logging during survey tool obtains; And the wireless transmitter to be connected with described control circuit, it writes in microstorage for the described underground survey data received by described control circuit;

Wherein, described with under boring and throwing effect that pipe nipple releases order at the microstorage that described control circuit sends, the microstorage being loaded with described underground survey data is released into ground.

2. data transmission system according to claim 1, is characterized in that,

Described housing sidewall of throwing pipe nipple with brill is provided with microstorage release aperture, the microstorage being wherein loaded with described underground survey data is released in the annular space between described drill string and the borehole wall by described microstorage release aperture, makes described microstorage follow mud circulation and is back on ground.

3. data transmission system according to claim 2, is characterized in that, described with brill throw pipe nipple also comprise:

The actuating unit be connected with described control circuit, action under the effect that its microstorage sent at described control circuit releases order;

Microstorage relieving mechanism, it can keep described microstorage in a first state, and under the effect of described actuating unit, be transformed into the second state, the microstorage being loaded with described underground survey data can be released in described annular space via described microstorage release aperture.

4. data transmission system according to claim 3, it is characterized in that, described microstorage relieving mechanism comprises microstorage and keeps in cabin, when described microstorage relieving mechanism is under the first state, cabin kept in by described microstorage can temporarily deposit the microstorage being loaded with underground survey data, when described microstorage relieving mechanism is under the second state, described microstorage is kept in cabin and is gone at the effect backspin of described actuating unit and be communicated with described microstorage release aperture.

5. data transmission system according to claim 4, it is characterized in that, described with brill throw pipe nipple also comprise the microstorage holding bay be arranged in described clearance space, its upper end is communicated with described drill string, lower end is kept in cabin with described microstorage and is communicated with, and makes the microstorage in described microstorage holding bay can enter described microstorage under the effect of the drilling fluid from described drill string and keeps in cabin.

6. data transmission system according to claim 5, it is characterized in that, described wireless transmitter comprise be connected with described control circuit write data wire with boring data, and connect described with bore data write data wire and be arranged in described microstorage holding bay with brill data write antenna, the described write with boring data write antenna and be designed to only carry out the microstorage be stored in described microstorage storage cabin underground survey data at every turn.

7. data transmission system according to claim 6, is characterized in that, described region of keeping in cabin with the brill data write antenna close described microstorage be arranged in described microstorage holding bay.

8. data transmission system according to claim 3, is characterized in that, described actuating unit comprises motor and reducer.

9. data transmission system according to claim 5, it is characterized in that, described microstorage relieving mechanism also comprises drilling fluid flow channels, it is arranged to only just be communicated with described microstorage holding bay in the second condition, making the drilling fluid via described drilling fluid flow channels can enter described microstorage keeps in cabin, outwards discharges with the microstorage of being kept in cabin by described microstorage.

10. data transmission system according to claim 9, is characterized in that,

Described drilling fluid flow channels is formed as the runner pipe with arm, and described arm and described microstorage discharge temporary cabin is communicated with.

11. data transmission systems according to claim 9, is characterized in that,

Described microstorage relieving mechanism have rotated 90 degree relative to described first state in said second condition.

12. data transmission systems according to claim 1, is characterized in that,

Described control circuit timed sending microstorage releases order.

13. data transmission systems according to claim 1, is characterized in that, described with brill throw pipe nipple also comprise:

The signal receiving antenna be connected with described control circuit, it receives and releases order from the microstorage on ground, and is released order by described microstorage and be transferred in described control circuit.

14. data transmission systems according to claim 13, is characterized in that,

Described signal receiving antenna is RFID label antenna, and its reception is released order from the microstorage in the RFID label tag on ground.

15. data transmission systems according to claim 1, is characterized in that, also comprise:

Ground receiving wastewater facility, it receives and processes the underground survey data in described microstorage.

16. data transmission systems according to any one of claim 1 to 15, is characterized in that,

Described microstorage be formed as diameter in the scope of 5 millimeters-50 millimeters, the spheroid of thickness in the scope of 0.1 millimeter-50 millimeters or cylinder.

17. data transmission systems according to claim 16, is characterized in that,

The data volume that described microstorage can load is in the scope of 1 bit-100 megabit.

18. 1 kinds of methods using the system according to any one of claim 1 to 17 to transmit underground survey data, comprising:

Multiple microstorage is put into throwing in pipe nipple with brill;

Received by control circuit and send the underground survey data that the measurement of well logging during survey tool obtains;

By wireless transmitter, the underground survey data of described control circuit are write in microstorage;

Under the effect that the microstorage sent at described control circuit releases order, by throwing pipe nipple with brill, the microstorage being loaded with described underground survey data is released into ground.