阅读说明：本技术 一种存储设备及包含其的钻铤 (Storage device and drill collar comprising same ) 是由 曾义金 李三国 李继博 张卫 朱祖扬 倪卫宁 李永杰 于 2019-10-18 设计创作，主要内容包括：本发明提出了一种存储设备及包含其的钻铤,该存储设备包括密封室、设置在密封室中的控制器、密封舱、能设置在密封舱中的微存储器和动力装置,其中,微存储器能与控制器连接,以在控制器读取LWD数据或者随钻中控模块中的数据后将数据传送到微存储器,并且该控制器能发送指令使得动力装置促动密封舱打开而令微存储器脱落到井筒中该存储设备用于实现快速稳定地将LWD测量数据或者随钻中控模块中的转存至微存储器,然后在井底将微存储器从钻铤中有效释放至环空,该微存储器随钻井液循环返回地面,在地面被回收并读取数据,由此大大提高了精细化大数据量的随钻测量数据应用时效。(The invention provides a storage device and a drill collar comprising the same, the storage device comprises a sealed chamber, a controller arranged in the sealed chamber, a sealed cabin, a micro-storage device and a power device, wherein the micro-storage device and the power device can be arranged in the sealed cabin, wherein the micro memory can be connected with the controller to transmit data to the micro memory after the controller reads LWD data or data in the while drilling central control module, and the controller can send instructions to enable the power device to actuate the sealed cabin to open so as to drop the micro memory into the shaft, the storage device is used for realizing the fast and stable storage of LWD measurement data or the storage in the while-drilling central control module into the micro memory, and then the micro memory is effectively released from the drill collar to the annulus at the well bottom, the micro-memory is recycled back to the ground along with the circulation of well drilling fluid, and data are recovered and read on the ground, so that the application timeliness of refined large-data-volume measurement data along with drilling is greatly improved.)

1. A memory device for time-shared data transmission downhole, comprising:

the chamber is sealed and the air-tight chamber,

a controller disposed in the sealed chamber,

the sealed cabin is a sealed cabin, and the sealed cabin is a sealed cabin,

a micro-memory capable of being disposed in the capsule,

a power device arranged in the sealed chamber,

wherein the micro-memory is connectable to the controller to transfer data to the micro-memory after the controller reads LWD data or data in the center while drilling module, and the controller is operable to send instructions to operate the power plant and actuate the capsule to open to allow the micro-memory to be dropped into the wellbore.

2. The storage device of claim 1, comprising:

an outer cylinder provided with an opening on a wall thereof,

an inner push rod arranged in the inner cavity of the outer cylinder, an inner groove is arranged on the wall of the inner push rod, the inner push rod can be connected with the power device to be actuated to move relative to the outer cylinder,

wherein, during the process that the inner push rod moves relative to the outer cylinder, the inner groove can selectively form the sealed cabin with the wall of the outer cylinder or can be opposite to the opening.

3. The storage device of claim 2, wherein the power plant has:

a power source for supplying power to the motor,

one end of the lead screw is fixedly connected with the power source, the other end of the lead screw can penetrate through the wall of the sealing chamber to be connected with the inner push rod,

and the lead screw support can be matched with the lead screw and is fixed on the corresponding wall of the sealing chamber.

4. The storage device of claim 2, comprising a transmission data line for connecting the micro memory with the controller, a portion of the transmission data line extending in the inner ram along an axis of the inner ram.

5. The memory device according to claim 4, wherein high-voltage pins are sealingly provided on the wall of the hermetic chamber for connecting the transmission data lines at both ends of the wall of the hermetic chamber,

and/or a spring contact is arranged on the inner push rod and used for connecting the transmission data line and the micro memory.

6. The memory device of claim 2, wherein a snap assembly is provided on the micro memory between the corresponding inner recess to define the micro memory.

7. The memory device of claim 6, wherein the clamping assembly comprises:

a first positioning groove provided on an end wall of the inner groove,

a second positioning groove provided on the other end wall of the inner groove,

a first protrusion disposed at one end of the micro memory, the first protrusion capable of extending into the first positioning groove in a matching manner,

the second bulge is arranged at the other end of the micro-memory and can extend into the second positioning groove in a matching manner, and the width of the first positioning groove is different from that of the second positioning groove.

8. The storage device of claim 1, wherein the sealed chamber is filled with a non-conductive hydraulic oil.

9. The storage device as claimed in any one of claims 2 to 8, wherein a plurality of axially spaced inner grooves are provided in the inner pushrod, one or more of the inner grooves being in a group, and a seal ring is fitted over the inner pushrod at each end of the group of inner grooves.

10. A drill collar comprising a storage device as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the field of measurement while drilling in the field of oil drilling while drilling, in particular to a storage device and a drill collar comprising the same.

Background

Downhole measurement-while-drilling techniques have been vigorously developed. LWD data generated by a downhole measurement tool or data in a while-drilling central control module are increasing day by day, such as refined imaging data, acoustic measurement data, magnetic resonance measurement data and the like, which accurately reflect various physical and oil gas information of underground strata, and play an important role in the aspects of understanding and evaluating reservoirs, geosteering operation and the like. However, the capacity of these data is very large, but the current wireless real-time transmission means from the downhole to the uphole is limited, the downhole data uploading mode mainly adopts a mud or electromagnetic wave mode, the data transmission rate is several bits per second (bps), in the real-time transmission, the bandwidth of the data transmission rate can hardly and completely upload downhole fine measurement data, only basic data can be selectively uploaded, and in the actual drilling process, the role of the downhole measuring instrument in recognizing the reservoir and drilling engineering is limited. Reading downhole measurement data after tripping out severely lags the application of measurement information, thus limiting the application of downhole measurement tools.

Thus, there is a need for an efficient storage device to enable time-shared data transfer downhole.

Disclosure of Invention

In view of some or all of the above technical problems in the prior art, the present invention provides a storage device and a drill collar including the same. The storage device is used for rapidly and stably transferring LWD (logging while drilling) measurement data or data transferred from a while-drilling central control module to the micro memory, then the micro memory is effectively released to an annulus from the drill collar at the bottom of a well, well fluid of the micro memory is circularly returned to the ground while drilling, and the data are recovered and read on the ground, so that the application time of refining large data volume is greatly improved.

According to an aspect of the present invention, there is provided a storage device including:

the chamber is sealed and the air-tight chamber,

a controller disposed in the sealed chamber and having a control,

the sealed cabin is a sealed cabin, and the sealed cabin is a sealed cabin,

a micro-memory that can be disposed in the capsule,

a power device, a power device and a control device,

wherein the micro-memory is connectable to the controller to transfer data to the micro-memory after the controller reads the LWD data or the data in the center while drilling module, and the controller is operable to send instructions to cause the power plant to actuate the capsule to open to allow the micro-memory to be tripped into the wellbore.

In one embodiment, the method comprises the following steps:

an outer cylinder, an opening is arranged on the wall of the outer cylinder,

an inner push rod arranged in the inner cavity of the outer cylinder, an inner groove arranged on the wall of the inner push rod, the inner push rod can be connected with a power device to be actuated to move relative to the outer cylinder,

wherein, in the process that the inner push rod moves relative to the outer cylinder, the inner groove can selectively form a sealed cabin with the wall of the outer cylinder or can be opposite to the opening.

In one embodiment, a power plant has:

a power source for supplying power to the motor,

one end of the screw rod is fixedly connected with the power source, the other end of the screw rod can penetrate through the wall of the sealing chamber to be connected with the inner push rod,

the lead screw support can be matched with the lead screw and is fixed on the corresponding wall of the sealing chamber.

In one embodiment, a transmission data line for connecting the micro memory and the controller is included, a portion of the transmission data line extending in the inner ram along an axis of the inner ram.

In one embodiment, high-voltage pins are hermetically arranged on the wall of the sealed chamber and used for connecting transmission data lines at two ends of the wall of the sealed chamber,

and/or a spring contact is arranged on the inner push rod and used for connecting the transmission data line and the micro memory.

In one embodiment, a clamping assembly is provided on the micro memory device between the micro memory device and the corresponding inner recess to define the micro memory device.

In one embodiment, the clamping assembly comprises:

a first positioning groove arranged on one end wall of the inner groove,

a second positioning groove arranged on the other end wall of the inner groove,

a first protrusion arranged at one end of the micro memory and capable of extending into the first positioning groove in a matching manner,

the setting is at the second protrusion of the other end of little memory, and the second protrusion physical stamina match formula extends to in the second constant head tank to the width of first constant head tank is inequality with the second constant head tank.

In one embodiment, the sealed chamber is filled with a non-conductive hydraulic oil.

In one embodiment, a plurality of axially spaced inner grooves are formed in the inner push rod, one or more inner grooves form a group, and the inner push rod at two ends of the group of inner grooves is sleeved with a sealing ring.

According to another aspect of the invention, there is provided a drill collar including the storage device described above.

Compared with the prior art, the storage device has the advantages that the storage device is arranged on the drill collar, can collect LWD measurement data or be in a while-drilling central control module and stored into the micro-memory as well as effectively release the micro-memory from the sealed cabin to the annular space at the well bottom along with the descending of a drilling tool into a well bore through the control of the controller. The micro-memory returns to the ground along with the drilling fluid to transmit imaging and other fine LWD data to the ground for fine evaluation of the formation during the drilling process.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 shows a drill collar according to one embodiment of the present invention;

FIG. 2 shows a sealed chamber of a storage device according to one embodiment of the invention;

FIG. 3a shows a schematic view of a closed state of a capsule according to an embodiment of the invention;

FIG. 3b shows a schematic view of the open state of the capsule according to one embodiment of the invention;

FIG. 4 shows a top view of the outer barrel according to one embodiment of the present invention;

FIG. 5 shows a top view of an outer barrel according to another embodiment of the present invention;

FIG. 6 shows a cross-sectional view of an outer barrel according to another embodiment of the present invention;

FIG. 7 shows a top view of an inner ram according to an embodiment of the present invention;

fig. 8 shows a top view of an inner ram according to another embodiment of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

The invention will be further explained with reference to the drawings.

FIG. 1 shows a drill collar 200 according to one embodiment of the invention. As shown in FIG. 1, a storage device 100 is disposed on a drill collar 200. And the storage device 100 comprises a sealed chamber 7, a controller 1, a sealed capsule 2, a micro-memory 3 (shown in figure 3 a) and a power means 8. Wherein, seal chamber 7 is used for storing controller 1 and power device 8 etc. to avoid contacting drilling fluid etc. guarantee controller 1 and power device 8 can normally work. The controller 1 can read LWD data or data in the while drilling central control module, and the micro memory 3 can be connected with the controller 1 so that data can be transferred and saved to the micro memory 3. Meanwhile, at the beginning of the drill collar running, the micro storage 3 is stored in the capsule 2. And the controller 1 can also send commands to operate the power plant 8. And the power means 8 is used to drive the capsule 2 open to release the micro reservoir 3 into the wellbore.

Therefore, the storage device 100 of the present application can complete data exchange between the micro memory 3 and the downhole measurement tool, and store the refined measurement-while-drilling data with large data volume into the micro memory 3. In the process of drilling, if refined data needs to be acquired, an instruction can be sent, the micro-memory is released from the sealed cabin 2 into the annulus of the drilling shaft, well fluid while drilling circularly returns to the ground, the data is recovered and read on the ground, and the application timeliness of refined large-data-volume measurement information while drilling is greatly improved. Although the data can not be acquired online, the underground data can be acquired in real time according to the requirement without stopping drilling in the drilling process, and the application efficiency of the underground measurement while drilling tool is improved. In addition, the storage device 100 completes data transmission in a short distance in the well, and is high in transmission rate and simple in structural layout.

It should be noted that, as shown in fig. 1, the seal chamber 7 may be formed by a first groove 201 formed on the drill collar 200 and an end cap 202 that is sealed to cover an opening of the first groove 201, and the seal chamber 7 may also be an external component disposed on the drill collar 200. The purpose of the sealed chamber 7 is to contain some components such as the controller 1 and protect it from normal operation. Meanwhile, electronic components and the like can be dispersedly arranged in different sealed chambers 7 according to different structural spaces of the drill collar 200. Also, the sealed chamber 7 may be an integrated chamber, or may be two or more chambers divided. In fig. 1, the sealed chamber 7 comprises two chambers, one for the controller 1 and the other for the deployment of the power means 8.

In one embodiment, the storage device 100 further comprises an outer barrel 4 and an inner push rod 5, as shown in FIG. 3 a. In which the outer cylinder 4 has an axially extending bore and is provided with an opening 41 in its wall to communicate with its bore, figure 6 shows a particular cross-section of the outer cylinder 4, in which case a second groove 203 may be provided in the wall of the drill collar 200, the outer cylinder 4 being able to be structurally fittingly inserted into the second groove 203. The inner push rod 5 is arranged in the inner cavity of the outer cylinder 4. Meanwhile, an inner groove 51 is provided on the wall of the inner push rod 5. When the inner push rod 5 is in the first position, the inner groove 51 and the opening 41 are completely staggered so that the inner groove 51 can form the capsule 2 with the wall of the outer cylinder 4, as shown in fig. 3 a. When the power device 8 pushes the inner push rod 5 to move along the axial direction relative to the outer cylinder 4, the inner groove 51 can correspond to the opening 41, which corresponds to the opening of the sealed cabin 2, as shown in fig. 3 b. At this point, the micro memory 3 located in the original capsule 2 can be released.

In a specific structure, one opening 41 may correspond to one inner groove 51, and of course, may correspond to a plurality of inner grooves 51. That is, the inner recesses 51 may be mounted in groups, as shown in fig. 7 and 8, respectively. In fig. 4, a plurality of axially spaced openings 41 may be provided in the wall of the outer barrel 4 to correspond one-to-one with the inner grooves 51 of fig. 7. This arrangement allows the stroke of the inner push rod 5 to be short, as the openings 41 communicate with the inner grooves 51 in a one-to-one mating fashion as the inner push rod 5 moves a certain distance relative to the outer cylinder 4. In fig. 5, on the other hand, an axially elongated opening 41 is provided in the outer tube 4 so as to oppose a plurality of inner grooves 51 grouped in fig. 8. The arrangement in which the inner recesses 51 of one set communicate with the openings 41 in turn during the movement of the inner push rod 5 relative to the outer cylinder 4 makes the construction of the inner push rod 5 relatively simple. Preferably, a plurality of, for example, 8, inner recesses 51 may be provided to simultaneously place a plurality of micro memories 3, and to make the data stored by each micro memory 3 identical, so as to ensure the success rate of the micro memory 3 going back out of the well at the drilling site.

It is easily understood that the effective diameter of the opening 41 is larger than that of the micro memory 3 to ensure the micro memory 3 to be released smoothly. In addition, structurally, the inner push rods 5 at both ends of the group of inner grooves 51 (one or more inner grooves 51 may be included in the group of inner grooves 51) are provided with sealing rings 6, so that during the movement of the inner push rods 5 relative to the outer cylinder 4, the sealing rings 6 at both ends are abutted against the inner wall of the inner cylinder 4, thereby forming the sealed cabin 2 between the outer cylinder 4 and the inner push rods 5. And the sealed cabin 2 is under the closed condition, and the sealed capsule 2 is airtight to sealing washer 6 has been realized, avoids drilling fluid etc. to get into sealed cabin 2 and influence the transmission of electric power and data.

In practical use, the outer cylinder 4 and the inner push rod 5 can be embedded in the second groove 203 of the drill collar 200 after being combined. Of course, the outer cylinder 4 may be a separate external member that can be fitted into the second groove 203, or may be a combined member formed by the second groove 203 and a cover plate or the like that is sealingly covered thereon. Additionally, for ease of deployment, the second slot 203 may be adjacent to the first slot 201 to simplify the deployment of the actuator. For example, the first and second slots 201 and 203 may be adjacent and correspond to a spacer 204 disposed intermediate the first and second slots 201 and 203.

As shown in fig. 2, the power unit 8 includes a power source 81, a lead screw 82, and a lead screw support (not shown). Wherein a power source 81 is provided in the sealed chamber 7 for providing power. One end of the screw 82 is fixedly connected to the power source 81 to receive power, and the other end thereof passes through the wall (partition 204 in fig. 1) of the hermetic chamber 7 to be connected to the inner push rod 5. The screw support can be engaged with the screw 82 and sealingly fixed to the corresponding wall of the seal chamber. During operation of the power source 81, the lead screw 82 is actuated to rotate, and during rotation of the lead screw 82, it can be screw-fitted with respect to the lead screw support, thereby completing axial movement of the inner push rod 5. The power device 8 is simple in structure and easy to realize. Of course, the power source 81 further includes a power motor 83 and a speed reducer 84 according to actual requirements. The motor transmission shaft 85 of the power motor 83 is used for outputting power to the speed reducer 84, and the power output shaft 86 of the speed reducer 84 is connected with the screw 82. The output torque is improved by arranging the speed reducer 84, and the release power is ensured. In the using process, when the micro memory 3 needs to be released, the micro memory 3 is disconnected from the controller 1, so that the micro memory 3 enters a non-electricity state, then a release instruction is sent to the power device 8, the power motor 83 is controlled to rotate, and the speed reducer 84 and the lead screw 82 are driven to move accordingly. The screw 82 actuates the inner push rod 5 to move along the axis of the outer cylinder 4, the micro-reservoir 3 reaching the release position after the inner groove 51 corresponds to the opening 41.

A transmission data line 9 is provided for connecting the controller 1 and the micro memory 3 to supply power and transfer data to the micro memory 3 through the transmission data line 9, as shown in fig. 3 b. During the actual installation of the transmission data line 9, if a plate or wall similar to the partition 204 is encountered, a high voltage pin (not shown) or other cable connector (not shown) may be sealingly disposed on the partition 204 for connecting the transmission data line 9 at both ends of the partition 204. And in the inner push rod 5 part, the transmission data wire 9 extends in the inner push rod and can be realized by slotting or perforating.

A spring contact 52 (shown in fig. 7) is provided on the inner push rod 5 for connecting the transmission data line 9. Meanwhile, a contact capable of connecting with the spring contact 52 is provided on the micro memory 3. That is, the contact of the micro memory 3 is connected to the spring contact 52, and the spring contact 52 provided in each inner recess 51 is connected to the transmission data line 9. This arrangement provides power to the micro memory 3 through the spring contact 52, which in turn transfers data to the micro memory 3. For example, each micro-memory 3 may have four contacts, two of which are powered, and two of which perform data exchange using a 485 bus protocol, which is consistent with the MWD data protocol. Accordingly, the transmission data line 9 and the spring contact 52 are arranged in a mating manner.

The arrangement adopts a wired data transmission mode, and the problem of data communication between the micro-memory 3 and the underground measuring tool is solved. Compared with wireless transmission, wired transmission can ensure that a large amount of data is stored in the micro-memory 3 quickly and stably, meanwhile, the influences of underground vibration, temperature and the like are not needed to be worried about, and better and more stable data transmission quality can be ensured. It should be noted that, in order to realize the electrical connection and the data connection between the micro memory 3 and the controller 1, the layout of the transmission data lines 9 may be adjusted according to the structure, for example, whether it is necessary to penetrate the solid wall. By providing the spring contact 52, the electrical and data signal connection of the micro memory 3 is facilitated. Meanwhile, in the process of releasing the micro storage device 3, the spring contact piece 52 can also play a role of urging the micro storage device 3 to leave the inner groove 51, so that the effective release of the micro storage device 3 is ensured.

The transmission data line 9 may be provided by drilling a mounting hole or a groove in the inner push rod 5. Meanwhile, after the transmission data line 9 penetrates or is arranged into the mounting hole or the groove, and after the spring contact piece 52 is connected with the transmission data line 9, sealant is arranged in the groove or the mounting hole for electrical sealing, so that electrical faults such as short circuit are prevented, and safety is guaranteed.

A snap-in assembly is provided on the micro memory 3 between the two end walls of the respective inner recess 51. Specifically, as shown in fig. 7, the card assembly includes a first positioning groove 53 provided on one end wall of the inner groove 51, a second positioning groove 54 provided on the other end wall of the inner groove 51, a first protrusion (not shown) provided at one end of the micro storage device 3, and a second protrusion (not shown) provided at the other end of the micro storage device 3. Wherein the first protrusion can matingly extend radially into the first detent 53 and the second protrusion can matingly extend radially into the second detent 54. Preferably, the width of the first positioning slot 53 is different from that of the second positioning slot 53, and the first protrusion and the second protrusion are arranged in a matching manner. The arrangement can ensure quick and accurate installation and avoid faults caused by wrong installation for the installation and positioning between the micro memory 3 and the inner groove 51. Meanwhile, the stable position relation between the micro memory 3 and the inner push rod 5 can be ensured, and the stable transmission of data and the like is further ensured.

The sealed chamber 7 may be filled with a non-conductive hydraulic oil for reducing or equalizing downhole pressure and for ensuring insulation of the circuit electronics.

After the inner push rod 5 is put into the outer cylinder 4 and put together into the second groove 203, a space 10 is formed outside both ends of the inner push rod 5 in the axial direction together with the outer cylinder 4 and the second groove 203, respectively, as shown in fig. 3 b. This space 10 is compressed or enlarged during the axial movement of the inner push rod 5 relative to the outer cylinder 4. The pressure balancing hole 42 is formed in the wall of the outer cylinder 4 and is communicated with the space 10, so that the pressure of the space 10 and the borehole annulus can be balanced, the smooth sliding of the inner push rod 5 can be ensured, and the release performance of the micro storage device 3 can be ensured.

In use, the controller 1 is placed in the seal chamber 7, is close to the MWD central control sub of the drill collar 200, and is connected with the MWD central control system to receive data and instructions of the MWD central control system. According to the requirement, one or more storage devices 100 can be arranged on one drill collar 200, and a plurality of storage devices 100 can be arranged on different drill collars 200 so as to meet the requirements of various data storage and data time-sharing communication.

The method of use of the storage device 100 is described in detail below with respect to fig. 1 through 8.

First, the storage device 100 is placed on the drill collar 200 with the micro storage 3 inside the capsule 2. So that the collar 200 is lowered into the well with the drill string.

When the drill string works, the controller 1 detects the data flow of the LWD measuring instrument or the MWD underground central control system, and starts to detect the working state of the micro-memory 3. If the micro memory 3 is in a normal working state, the sealing cabin 2 is well sealed. Power supply to the micro memory 2 through the transmission data line 9 and the spring contact 52 is started and data is transmitted. If some micro memory 3 is not in normal working state, the connection channel of the micro memory 3 is disconnected.

When two states are satisfied, one is that the storage space of the micro memory 3 is zero (data is full), and the other is that the controller 1 receives the release command of the MWD, the controller will first disconnect the power supply and data transmission connection with the micro memory 3, so that the micro memory 3 enters the non-power state. The controller 1 then sends a release command to the power unit 8 to control the power motor 83 to rotate until the inner push rod 5 is pushed to move in the outer cylinder 4 to open the capsule until the opening 41 is opposite to the opening of the inner groove 51 and the micro memory 3 reaches the release position.

The micro reservoir 3 is released into the borehole annulus by the spring force of the spring contact 52, and the centrifugal force of the drill string rotation, returning to the surface while drilling fluid. And then the micro memory 3 is captured and data is read, so that the uploading of a large amount of data which cannot be uploaded by MWD (measurement while drilling) and the like is realized.

In the invention, through the structure of the sealed cabin 2, the success rate of the release of the micro memory 3 is effectively improved, and the stability and reliability of the release are enhanced; the micro memory 3 and the controller 1 are in a wired data transmission mode, so that the problem of data communication between the micro memory 3 and an underground measuring tool is solved, a large amount of data can be stored in the micro memory 3 quickly and stably, and the influence of underground vibration, temperature and the like on wireless data transmission is not worried; the storage device 100 is simple in structure, few in movable parts, and stability and reliability of the storage device 100 in underground work are improved; the outer cylinder 4 and the inner push rod 5 used for releasing and storing the micro-memory 3 are independent structures, and the underground drill collar can be customized according to needs, so that the installation number of the outer cylinder 4 and the inner push rod 5 is effectively expanded, the number of the micro-memories 3 is configured according to needs, and time-sharing transmission of underground data is guaranteed.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.