Device and method of heat dissipation in well tool

FIELD: oil and gas industry.

SUBSTANCE: device includes hold-down unit having inlet fluid medium opening, which is connected in detachable manner to outlet fluid medium opening of well tubular element, outlet fluid medium opening, which is connected in detachable manner to inlet fluid medium opening of well tubular element, and channel passing between inlet fluid medium opening of hold-down unit and outlet fluid medium opening of hold-down unit and including the inward passing projection intended for heat transfer from the heat-generating element to fluid medium flowing through the channel.

EFFECT: increasing heat dissipation efficiency in well tool.

13 cl, 10 dwg

 

The technical FIELD of the INVENTION

The present description relates, in General, to systems downhole tool and, more particularly, to a device and method of heat dissipation in the downhole tool.

BACKGROUND of INVENTION

The construction of wells in the reservoir involves the drilling of subterranean formations and the monitoring of various parameters of subsurface strata. Drilling and monitoring typically includes the use of downhole tools with powerful electronic devices. During operation, the electronic device form heat, which often heats the downhole tool. Heat can be detrimental to the operation of the downhole tool. The traditional method of heat dissipation involves the use of thepopularity in the downhole tool. Another conventional method involves the use of a heat pipe cycle of evaporation-condensation with passive capillary flow action for the discharge of heat from the heat source. In the cycle of evaporation-condensation of the fluid in the heat pipe of the closed loop evaporates when spreading the heat. Gaseous vapor carries heat with passive capillary flow action. After cooling, the steam condenses in the fluid, which again you can vaporize for transmission of dopolnitelnogo in the gas state.

The INVENTION

According to a variant of the present invention heavy-weight drill pipe tool includes a housing with a first outer surface, a first inlet fluid and the first outlet of the fluid. Heavy-weight drill pipe tool also has a passage therein, the second inlet pipe fluid contact with the first outlet of the fluid housing, the second outlet fluid contact with the first inlet of the fluid housing and the first inner surface with at least one protrusion is held in the channel.

According to another variant of the invention the device for heat dissipation includes a housing and the first channel of the flow passing along part of the building. The first channel of the flow skips the first part of the fluid to the first heat generating element. The first channel of the flow has a surface channel and at least one projection extending from the surface of the channel in the first channel of the tributary. The device also includes an exhaust channel connected to the first channel of the flow, to move the first part of the fluid from the heat generating element.

According to another variant of the invention, the method of heat dissipation includes moving the fluid through the channel and the heat transfer is t heat generating elements in the fluid. The method also includes mixing the fluid in the channel using at least one protrusion, made in the channel, and the dissipation of the fluid.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 shows a drilling rig and drill string, which may use the devices and methods described in this document.

Figure 2 shows the cross section of the borehole with the tool on wireline suspended in the wellbore, which can use the devices and methods described in this document.

Figure 3 shows a block diagram of a variant of the device that can be used in the drill string 1 and/or the tool on wireline 2 for dissipating heat from heat generating components.

On figa shows the longitudinal section, and figv shows the cross-section of a device that can be used to dissipate heat from heat generating devices, by moving the fluid to the heat generating devices and from them.

Figure 5 shows an isometric view of the device figa and 4B.

On figa shows an isometric view of the clamping unit chassis, which is an example of a device figa, 4B and 5.

On FIGU shows the cross section of the clamping unit chassis figa, 4B, 5, 6A.

On figs shows the longitudinal slashing the Oia clamping unit chassis figa, 4B, 5, 6A, 6B.

On figa shows the longitudinal section, and figv shows the cross-section of another variant of the device with the extension of the heat exchanger for dissipating heat from heat generating devices.

On Fig shows an isometric view of a variant of the extension of the heat exchanger figa and 7B.

Figure 9 shows a graph of the relationship between the temperature of the heat generating device and the flow rate of fluid through the device of figure 4.

Figure 10 shows the precedence diagram method, which can be used to dissipate heat from a device 4 and 7.

DETAILED description of the INVENTION

The above figures shows some variations of the invention are described below. When describing these options, the same or identical reference position used to specify shared or identical elements. The figures are not necessarily made to scale, and certain features and certain views of the figures may be shown in the modified scale or be a schematic for simplicity and/or clarity.

Figure 1 shows a variant of the drilling rig 110 and the drill string 112, in which variants of the devices and methods described herein can be used to dissipate heat from heat generating components. Land drilling rig 10 has a base and tower, installed over the barrel W wells, revealing a subterranean formation F. In the example shown, the barrel W well done rotary drilling of a well known manner. However, specialists in the art who successfully exploited this description, it should be clear that the present invention can be used for directional drilling, and the devices and methods described herein are not limited to, land drilling rigs.

Drill string 112 is suspended in the wellbore W wells and contains at its lower end of the drill bit 115. Drill string 112 is rotated by the rotor 116 in contact with the leading drill pipe 117 at the upper end of the drill string 112. Drill string 112 is suspended on the hook 118 traveling block (not shown) through the leading drill pipe 117 and the swivel 119, providing rotation of the drill string 112 relative to the hook 118.

Drilling fluid 126 is stored in a reservoir 127, performed at the wellsite. The pump 129 is designed to supply drilling fluid 126 in the inner volume of the drill string 112 through a hole (not shown) in the swivel 119 through which the drilling fluid 126 is introduced into the drill string 112 to pass through it in the direction indicated by the arrow 109. Drilling fluid 126 exits the drill string 112 through openings (not shown) in boroondara 115 and then circulates upward through the annular space 128 between the outer surface of the drill string 112 and the barrel wall W of the well in the direction the arrows 132. In this mode, the drilling fluid 126 lubricates the drill bit 115 and makes the cuttings of the formation to the surface, where the solution is returned to the tank 127 for re-circulation.

Drill string 112 additionally includes layout 100 of the bottom of the drill string near the drill bit 115 (for example, at a distance of several times the length of the drill from the drill bit 115). The layout 100 of the bottom of the drill string includes a heavy-weight drill pipe, described below, with equipment for measurement, processing and maintaining information, and ground/local Podkopaeva 140 data.

In the example shown, the drill string 112 is additionally equipped with a heavy-weight drill pipe 134 with the centralizer. Heavy-weight drill pipe centralizers are used to counteract the desire of the drill string to the "beat" and the deviation from the center of rotation in the barrel W wells, resulting in the deviation direction of the barrel W wells from the assigned trajectory (e.g., straight line). Such deviations may be due to the influence of excessive lateral effort into sections (for example, heavy-weight drill pipe of the drill string 112, and drill bit 115, producing accelerated wear. This effect can be overcome about what nasanam one or more heavy-weight drill pipe centralizer for centering the drill bit 115 and, to some extent, the drill string 112 in the shaft W of wells. Examples of centering tools known in the art include couplings to protect the pipe connections and other tools in addition to units with rigid blades. Variations of the devices and methods described herein can preferably be used in the dissipation of heat produced by the components, devices or elements that produce heat, such as electrical systems.

In the shown embodiment, the arrangement 100 of the bottom of the drill string equipped with a probing tool 150 with retractable probe 152 for sampling formation fluid from the formation F into the exhaust line probing tool 150. A pump (not shown) is equipped, for example, in another heavy-weight drill pipe 160 with a tool for sampling formation fluid through the probe tool 150. In the shown example, to supply power to pump heavy-weight drill pipe tool 160 is equipped with an AC generator (i.e., a generator) and the corresponding electrical components 162. The alternating current generator 162 is connected to the pump and the turbine (not shown)that receives the energy from the flow of drilling fluid 126, equipped with heavy-weight drill pipe 160 tool to bring in de is due to generator 162 AC. During the time when the generator 162 AC generates an electrical current, generator and related components 162 generate heat. The devices and methods described herein can preferably be used to dissipate the heat produced by the alternator and/or associated components 162 during operation. In addition, the devices and methods described herein can be used to dissipate heat directly from electrical components or other heat generating sources, or from telopeptide connected to the electrical components or produce heat sources.

The devices and methods described herein are not limited to drilling operations. The devices and methods described herein, preferably can be used during, for example, testing or servicing in the well. Additionally, the methods and devices can be implemented with reference to tests conducted in wells, revealing the subsurface, and in relation to methods relating to the use of assessment tools layer deployed on the bottom of a well known devices.

In figure 2, which shows an example of the tool 200 on wireline, suspended on a wireline 202 in the trunk W well vplate F. As the hoist cable 202 can use multi-conductor cable 202 connected to the electrical system 206, which may include a subsystem of the receiver, the processor, the recording device and the transmitter subsystem. The tool 200 on wireline includes an elongated housing having a few heavy-weight drill pipe. In the example shown, the tool 200 on wireline also includes a downhole system 208 electrical control in one of the drill to control the operation of the tool 200 on wireline 200 and the supply of electric power to various electrical subsystems of the tool 200 on wireline. Wireline 202 can be used to supply electrical power from the electrical system 206 to the downhole system 208, electrical control and other electrical parts of the tool 200 on wireline. In addition, the logging cable 202 can be used to transfer information between systems 206 and 208. The devices and methods described herein can be used to dissipate the heat generated by the downhole system 208 electrical control during operation.

In the shown example, the tool 200 is a tool side-coring, which can be implemented according to U.S. patent No. 6412575, vidan the mu assignee of the present invention. The tool 200 is provided with one or more support arms 210 to compress the trunk W wells, and the tool 200 is made with the possibility of selection of core samples from the formation F using the drilling crown 212 for drilling, pull-out tool 200 wireline logging into the formation F. the Samples can then be tested and analyzed in the tool 200, or save in the tool 200, and bring it to the surface for testing and analysis.

For rotation of the crown 212 for core drilling tool 200 is equipped with a motor (not shown), and for extension of the support arms 210 of the tool 200 are equipped with actuators (not shown). The power supply and/or control of a motor and actuators can perform downhole system 208 electrical control. During operation of the downhole system 208 electrical control generates heat when exercising power and/or engine management and Executive mechanisms. The devices and methods described herein can preferably be used to dissipate the heat generated by the downhole system 208 electrical control.

Although the tool 200 on wireline shows how the tool side of coring, the devices and methods described herein can be implemented with respect to any the other type of downhole tool.

Figure 3 shows a block diagram of a variant of the device 300, which may be included in the drill string 112 1 and/or tool 200 on wireline 2 for dissipating heat from heat generating components with the use of induced flow convective heat transfer. In the shown embodiment, the lines connecting the blocks, are hydraulic or electrical connections that may contain one or more hydraulic lines (e.g. lines of the working fluid of the hydraulic system or the reservoir fluid) or one or more wires or conductive channels, respectively.

The device 300 is equipped with the system 302 electronic equipment and the battery 304 to the power supply system 302 electronic equipment. The system 302 electronic equipment is arranged to control the operation of device 300 dissipate heat from heat generating components. In addition, the system 302 electronic equipment may also be performed to control other operations of the drill string 112 and/or tool 200 on wireline, which includes, for example, the operation of the sampling reservoir fluid, operations, testing and analysis, data transfer operations, and the like, for Example, the system 302 electronic equipment you can use to enter in is actually the components, used to control the generator 162 AC 1, and/or can be used for commissioning of the downhole system 208 electrical control figure 2. In the shown embodiment, the battery 304 is connected to the bus 306 of the tools is made for the transmission of power and signals data.

The system 302 electronic equipment equipped with a controller 308 (e.g., Central processor and memory unit) for commissioning of control programs, such as programs control the operation of the heat dissipation device 300, program management, test and measurement, etc. In the shown embodiment, the controller 308 may be implemented to receive data from various sensors in the device 300 and execute different instructions, depending on the received data. To save various instructions that when executed by the controller 308 causes the commissioning of the controller 308 management programs or other processes, the system 302 electronic equipment equipped with the electronically erasable programmable continually storage device 310.

For the preservation, analysis, processing and/or data compression test and measurement, or any types of data collected by the device 300, the system 302 electronic equipment equipped with the flash memory 312. To implement synchronize avannah events and/or generate information with a time stamp system 302 electronic equipment equipped with a generator 314 clock. To transmit information, which is an example when the device 300 is at the bottom, the system 302 electronic equipment equipped with a modem 316 connected to data bus 306 of the tool and subcomponents 140 (Fig 1). In this mode, the device 300 may transmit data to the surface and/or receive data from the surface through subcomponent 140 and the modem 316.

The device 300 is configured to dissipate heat from the heat generating source 322. In the shown embodiment, heat generating source 322 is placed in heavy-weight drill pipe, which can be used as the equipment of the drill string 112 1 and/or tool 200 on wireline 2. Produce heat source 322 may consist of one or more components, devices or systems that produce heat (for example, perform some other basic functions or operations). For example, heat generating source 322 may be a synchronous alternating current generator and associated components 162, discussed above with reference to figure 1, or produce heat source 322 may be a downhole system 208 electrical control discussed above in relation to figure 2. In some examples, the equipment generates heat source 322 may be a system 302 electronically the equipment. In any case, produce heat source 322 generates heat, and the device 300 is able to dissipate this heat from the heat generating source 322.

For removal of heat from the heat generating source 322 of the device 300 is equipped with block 326 chassis. Block 326 chassis has a surface 328 thermal contact with a heat generating source 322 to provide heat transfer from the heat generating source 322 to block 326 chassis. To dissipate the heat from block 326 chassis and heat generating source 322 block 326 chassis is equipped with a channel 330 of the fluid made to ensure passage of the fluid flow through the block 326 chassis for removal from the heat and supplying heated fluid from block 326 chassis and heat generating source 322. In the shown embodiment, fluid passes through the channel 332 inflow in block 326 chassis via the inlet port 334 of the fluid in the unit chassis and exits the block 326 chassis through the outlet 336 of the fluid. To dissipate the heat from the heat generating source 322 fluid included in the input hole 334 has a temperature lower than the temperature of the block 326 chassis that provides heat from the heat generating source 322. Thus, heat in block 326 chassis has to be relatively cold fluid passing through the channel 30 of the passage. In this mode, when the fluid passes through the channel 330, the fluid removes heat from the block 326 chassis, providing the ability to block 326 chassis to dissipate more heat from the heat generating source 322. Fluid then exits the block 326 chassis into the exhaust channel 340 to dissipate its heat in other areas. For example, the heat in the fluid can dissipate in the trunk W wells, surrounding which is an example of the device 300.

For additional heat dissipation from the heat generating source 322 of the device 300 is equipped with a radiator 344. The radiator 344 has a surface 346 for thermal contact with the block 326 chassis to ensure heat transfer from block 326 chassis in the radiator 344. The radiator 344 is open trunk W wells, so that the radiator 344 may dissipate heat from block 326 chassis in the trunk W wells. For example, the radiator 344 can dissipate heat into the air, drilling mud and/or stratiform the fluid in the trunk W wells. In some implementations of the radiator 344 may be a casing or sleeve heavy-weight drill pipe tool, thus increasing the amount of material of the radiator 344, which may remove heat from block 326 chassis, and also increasing the surface area of the radiator 344, heat dissipation in the trunk W wells. In some implementations of the radiator 344 may in addition or alternative, be placed in the internal cavity of heavy-weight drill pipe or tool to open it, dissipating heat into the air or drilling fluid passing through the internal cavity. Shown in figa, 4B, 5, 6A-6C, 7A, 7B, 8 options can be used to implement device 300 figure 3.

To move the fluid through the channels 330, 332, 340 and block 326 chassis device 300 is equipped with a pump 348. The pump 348 may be driven by an electric motor or any other suitable device. In the shown embodiment, the operation of the pump 348 controlled by the controller 308. For example, the controller 308 can be made to start and stop the pump 348 and/or changes in flow rate on the pump 348.

For temperature measurement unit 326 chassis device 300 is provided with a temperature sensor 352. To measure the temperature of the barrel W wells, the device 300 is equipped with another temperature sensor 354. In the shown embodiment, the sensors 352 and 354 are connected to the controller 308. Thus, the controller 308 may collect temperature information from sensors 352 and 354 and to use the temperature information to control the pump 348. For example, the controller 308 can be made to start the pump 348, when the temperature of the block 326 chassis matches or exceeds the predetermined temperature threshold, and stopping the pump 348, when the temperature of the block 326 chassis falls below the same threshold and the other threshold. In addition, the controller 308 may be performed by increasing the flow rate on the pump when the temperature increase block 326 chassis and reduce the performance of the pump when the temperature reducing unit 326 chassis. In some implementations, the temperature of the block 326 chassis can be characterized by the temperature of the heat generating source 322.

The controller 308 may also be used to start the pump 348, when the temperature of the barrel W wells (measured using a sensor 354) exceeds the temperature of the block 326 chassis or some other temperature value based on the temperature of the unit chassis. In addition, the controller 308 can stop the pump 348 on the basis of the temperature of the barrel W wells. In this mode, when the temperature of the block 326 chassis below the temperature of the barrel W wells, block 326 chassis can use the radiator 344 for heat dissipation in the trunk W wells. However, when the temperature of the block 326 chassis equal to or higher than the temperature of the barrel W wells, the heat should dissipate from block 326 chassis in the trunk W wells. Instead, the controller 308 can run the pump 348 and/or increase the flow rate on the pump 348 to increase the flow rate of the fluid passing through the block 326 chassis for heat dissipation from block 326 chassis through a fluid medium.

To maintain the pressure of the fluid in the channels 330, 332 and 340, there is TSS equal to the atmospheric pressure inside the heavy-weight drill pipe tool drill or tool on wireline, which implemented the device 300, the device 300 is equipped with a compensator 358. In the shown embodiment, the compensator 358 includes the arrangement of a spring and piston, working together to regulate the pressure of the fluid in the channels 330, 332, 340. Maintaining the pressure of the fluid is essentially equal to the surrounding atmospheric pressure, reduces the requirements for structural strength of the block 326 chassis and channels 330, 332, 340, which, in turn, reduces the space required for the device 300, and increase the space available in the drill string or tool on wireline or heavy-weight drill pipe for other purposes. Although the compensator 358 in the embodiment shown in figure 3 is implemented using a layout with a spring and a piston, compensator 358 can alternatively implement any other suitable system pressure compensation, which includes, for example, one or more flexible diaphragms, one or more membrane boxes, etc.

On figa shows the longitudinal section, and figv shows the cross-sectional variations of the device 400, which can be used to dissipate heat from heat generating devices 402a, 402b, 402c, for example, produce heat East is cnica 322 3, by moving the fluid to the heat generating devices 402a, 402b, 402c, and from them through the channel 404 of the fluid. In the shown embodiment, the device 400 is installed in heavy-weight drill pipe 406, which can be used in connection with the drillstring 112 (1) or tool 200 on wireline (figure 2).

The device 400 is equipped with a casing or base 408, having a clamping blocks 412a, 412b chassis installed in it. Produce heat devices 402a, 402b installed on prijemnom block 412a chassis, and a heat generating device 402c installed on prijemnom block 412b chassis. The functions of clamping blocks 412a, 412b chassis are essentially the same or identical to those described above with respect to blocks 326 chassis 3. The presser block 412a chassis includes a channel a fluid, and the presser block 412b chassis includes another channel 414b fluid medium to provide moving fluid through the pressure block 412a, 412b of the chassis. As shown, the channels 414a, 414b of the fluid to form a section of the channel 404 of the fluid to provide moving fluid medium through which the example device 400 dissipate heat from heat generating devices 402a, 402c. To increase the heat transfer coefficient, in the example shown, the clamping blocks 412a, 412b chassis is made using a material with relatively is relatively high thermal conductivity. In addition, fluid may be a working fluid of the hydraulic system or any other fluid medium suitable for transmission of heat from heat generating devices 402a, 402b.

Fluid is moved through the channel 404 using a pump, such as pump 348 figure 3. To move the fluid through the channel 404, the housing 408 is an example of a device 400 is equipped with inlet 416 of fluid and the outlet 418 fluid. The inlet 416 of the fluid can be connected to a channel (not shown)connected to the output connection of the pump (e.g. pump 348 figure 3), and the outlet 418 fluid may be connected to another channel (not shown)connected to the inlet side of the pump. In the example shown, the pump makes a relatively colder fluid medium to enter into the inlet 416 of the fluid, the fluid moves through the channel 404, removing heat from the clamping blocks 412a, 412b chassis (which remove heat from heat generating devices 402a, 402b, 402c), thus raising the temperature of the fluid, and the fluid then exits the housing 408 via the outlet port 418 fluid medium for heat dissipation. Fluid is then drained by the pump and is injected back through the channel 404 for further dissipation of heat from the heat generating device is in 402a, 402b, 402c. In some implementations, the flow rate of the fluid supplied by the pump can be adjusted to adjust the coefficient of heat transfer device 400.

In the shown embodiment, the clamping blocks 412a, 412b of the chassis is also designed to transfer heat out in the trunk W wells and the formation F. In the illustrated embodiment, the clamping blocks 412a, 412b chassis is installed on the housing 408 on the respective springs 422a, 422b and 424a, 424b compression preload clamping blocks 412a, 412b of the chassis to the casing 428 (e.g., sleeve) heavy-weight drill pipe 406. Specifically, springs 422a, 422b are located between the housing 408 and the holding block 412a chassis for applications outward force to the clamping block 412a chassis, causing thermal contact or heat connection surface 432 of the clamping block 412a chassis with the inner surface 434 of the housing 428. In a similar way, spring 424a, 424b are located between the housing 408 and the holding block 412b chassis for applications outward force to the clamping block 412b, determining thermal contact or heat the connection outer surface 436 of the clamping block 412b chassis with the inner surface 434 of the housing 428. In this way, the housing 428 can be used as a heat sink (e.g., radiator 344 described above in relation to figure 3) for heat dissipation from the clamping blocks 412a, 412b of the chassis in the trunk W SLE the new well and reservoir F.

In the shown example, the channels 414a, 414b with corresponding protrusions 442 (i.e. obstacles) to improve the coefficient of heat transfer from the clamping blocks 412a, 412b of the chassis to the fluid passing through the channels 414a, 414b, and the overall efficiency of the heat transfer device 400, when the fluid passes through the channel 404 to remove heat from heat generating devices 402a, 402b, 402c. In the shown embodiment, the protrusions 442 is made in the form of partitions. To improve the rate and efficiency of heat transfer baffles 442 prevent the flow of fluid to increase the intensity of mixing that occurs in the fluid by passing the fluid through the channels 414a, 414b. For example, when the partition 442 interrupt the flow of a fluid medium, the fluid medium is mixed, as shown by the position 444, causing a mixing of the fluid of higher temperature fluid medium with a lower temperature and, thus, lowering the overall temperature of the fluid to provide greater heat transfer from the clamping blocks 412a, 412b of the chassis in the fluid. As described below, with reference to figs, the sizes of the partitions 442 you can choose to modify the action of the mixing fluid. For example, the dimensions of the baffles 442 can, in some implementations, to choose to maximize actions paramasivan is.

Figure 5 shows an isometric view of the device 400 figa and 4B. The body 408 includes a recessed surface 502 with holes 504 to accommodate springs 422a, 422b, s, 422d compression. Hole 506 is executed in a recessed surface 502 for placement of heat generating devices 402a, 402b (figa). In addition, the hole 512 and the input hole 514 is executed in a recessed surface 502 to ensure the passage of the fluid in the clamping block 412a of the chassis and out of it. In the example shown clamping block 412a chassis includes an inlet pipe 516 clamping unit chassis and the outlet 518 clamping unit chassis, hydraulically connected to the channel 414a clamping block 412a chassis, shown in figa. When the presser block 412a chassis connected to the housing 408 on the recessed surface 502, the output hole 512 of the housing 408 posted by inlet pipe 516 clamping block 412a chassis and the input hole 514 of the housing 408 posted by outlet 518 clamping block 412a chassis. In addition, when the presser block 412a chassis connected to the housing 408, the presser block 412a chassis is in contact with the springs 422a, 422b, s, 422d compression. When the assembled housing 408 and the presser block 412a chassis placed or inserted into the housing 406, the said compression spring exerting directed outward force to the clamping block 412a chassis so that the presser block 412a Sass which is in thermal contact with the housing 406, as discussed above in relation to figa, to dissipate the heat in the trunk W wells and the reservoir F through the housing 406, because the body functions as a radiator (for example, the radiator 344 figure 3).

Although it is not shown in detail, the housing has another recessed surface 522 with symptoms similar to those described in relation to the recessed surface 502 of the notch. In the shown embodiment, the housing 408 is configured to accommodate the clamping block 412b (figa) on the recessed surface 522.

On figa shows an isometric view of the clamping block 412a chassis of the device shown in figa, 4B, and 5. On figa shows the inlet 516 and the outlet 518 clamping block 412a chassis. In addition, the heat generating devices 402a, 402b shown installed (or in contact) on prijemnom block 412a chassis. In some implementations of heat generating devices 402a, 402b can be connected without removal or removable connected with the clamping blocks 412a chassis. In other examples of implementation of heat generating devices 402a, 402b can be installed in housing 408 (figa and 5), and when the presser block 412a chassis gather with the body 408 or install it, heat generating devices 402a, 402b are in thermal contact with the clamping block 412a chassis for heat transfer from heat generating devices 402a, 402b, the secure unit 412a chassis.

On FIGU shows the cross section along the line C-C of the clamping block 412a chassis figa, 4B, 5 and 6A. In the shown example, the channel 414a accomplished through education of the camera in prijemnom block 412a chassis, occupying a large portion of the clamping block 412a chassis. One of the protrusions 442 (figa) is shown passing into the channel 414a. The first wall 602 of the clamping unit chassis has an outer surface 604, configured to accommodate the heat generating devices 402a, 402b and having a suction inlet 516 and the outlet 518 performed on it. The inner surface 606 of the first wall 602 of the clamping unit chassis open channel 414a and has protrusions 442 performed on it. When the heat generating device 402a, 402b generate heat, the heat is dissipated in the first wall 602 of the clamping unit chassis and is transmitted from the outer surface 604 of the inner surface 606 and the protrusions 442. When fluid passes through the channel 414a, fluid medium is in contact with the inner surface 606 and the protrusions 442 of the heat from the first wall 602 of the clamping unit chassis. In this mode, when a fluid passes through the channel 414a, heat is transferred from the heat generating devices 402a, 402b in the fluid.

The presser block 412a chassis equipped with a second wall 608 of the clamping unit chassis that can be connected (for example, prepare is a, connected by bolts and the like) or made as one piece with the first wall 602 of the clamping unit chassis for education channel 414a. In the example shown, the wall 608 of the clamping unit chassis is implemented as a curved wall to maximize surface area in thermal contact with the housing 406 (figa and 5). However, in other example implementations wall 608 of the clamping block may be performed using any other form of wall, suitable for a particular application. When fluid passes through the channel 414a, some of the heat taken from the heat generating devices 402a, 402b, carries fluid and part of the heat is transferred to the second wall 608 of the clamping unit chassis. In this mode, the wall 608 of the clamping unit chassis may dissipate some of the heat in the trunk W wells and the reservoir F (figa) through the housing 406 (figa, 4B, 5), which can function as a heat sink, for example the radiator 344 3.

On figs shows a longitudinal section of the clamping unit chassis figa, 4B, 5, 6A, 6B. The height of thehprotrusion and the width of thewprojections or baffles 442 is shown relative to the height of theHchannel and the overall size of the channel 414a. In addition, baffles 442 shown spaced at a distancedone from the other. In the example shown, the height of thehhanging baffles 442 is less than the total height ofHchannel. Dimensionshandwis errordoc 442 and step dbetween the baffles 442 can be selected to achieve the necessary efficiency or coefficient of heat transfer by modifying the surface area available for heat transfer from the clamping block 412a in the fluid, and modification number of obstacles to the flow of fluid created by the baffles 442. For example, the height of thehlip and/or width of thewcan be increased to increase the surface area open to the influence of the fluid passing through the channel 414a so that more surface area of each partition 442 had to transfer heat from heat generating devices 402a, 402b in the fluid. However, too much increase heighthlip and/or width of thewcan prevent the passage of fluid through the channel 414a and reduce the effect of mixing the fluid. In some implementations, the height of thehbaffles 442 relative to the height of theHchannel 414a preferably has a magnitude which must provide an acceptable pressure drop. Increase heighthwalls 442, in turn, increases the amount of mixing of the fluid, which in turn improves the heat transfer coefficient in the fluid. However, increasing the height of thehbaffles 442 also increases the resistance to fluid flow, therefore, the smaller the pressure of the fluid. In some implementations the width of thewbaffles 442 preferably kept to a minimum and is determined by the possibilities of making the partitions 442 on the basis of, for example, the material used and the height of thehbaffles 442. On the wider septum can cause unnecessary reduction of pressure fluid. Thus, in some implementations partition 442 can be performed such thin, which allows the requirements of structural strength for a particular application.

In some implementations of lengthdbetween the baffles 442 are preferably chosen exceeding the height of thehbaffles 442 more than six times, but less than eight times, because turbulent flow in the fluid re-attached (or decreases) at a distance from the walls, equal to about six heightshseptum. Thus, the height of thehand the width of theweach partition 442 can be selected to achieve a desired value of an area of the surface 602 of the clamping block of the chassis, under the influence of fluid, while also getting necessary fluid flow and mixing effect of the fluid in the channel 414a. In addition, the length of the channels 414a, 414b can be selected to change the heat transfer coefficient in the fluid, prog is handled through channels 414a, 414b.

In the shown embodiment, the baffles 442 are rectangular design with a constant step. However, in other example implementations, the baffles 442 can be implemented using a variety of forms, and each partition can be implemented using a shape different from the shape of other partitions. In addition, baffles 442 may alternatively be posted using different distances between the partitions. In some implementations of partitions can be constructed perpendicular to the fluid flow. However, in other examples of implementation of the partitions may be not perpendicular to the fluid flow.

On figa shows the longitudinal section, and figv shows the cross-section of another embodiment of a device 700 having the extension 702 of the heat exchanger for dissipating heat from heat generating devices 704a, 704b, 704c by moving the fluid through the multiple channels of the fluid. In the example shown is an example device 700 is equipped with a housing 708 and clamping blocks 712a, 712b of the chassis connected to the housing 708. Clamping blocks 712a, 712b of the chassis can be made essentially similar or identical to the clamping blocks 412a, 412b chassis figa. Each clamping block 712a, 712b chassis includes relevant is the overall channel a and 714b of the fluid, through which the circulation of the fluid in which the example device 700.

Extension 702 of the heat exchanger is designed to improve the coefficient of heat transfer from the fluid in the barrel W wells and the formation F by increasing the surface area of the channels in contact with the fluid medium to which heat can be transferred from the fluid, and the increase in the total length of the path of flow, where fluid can be mixed with relatively more efficiently. The length of the extension tube heat exchanger 702 and channels it can choose to increase the effective heat transfer. In the shown example, the extension 702 of the heat exchanger includes a housing 716, equipped with a ring cavity 718 flow executed in the housing 716. The annular cavity 718 inflow hydraulically connected to the channel a passage of fluid pressure block 712a chassis and channel 714b passage of the fluid pressure unit 712b chassis. On an isometric view of the housing 716 on Fig shows the implementation of the annular cavity 718 inflow in the housing 716.

As shown in figa, housing 716 also includes an inlet opening 722 of the fluid and an outlet opening 724 of the fluid. When fluid flows into the inlet 722, fluid passes through the extension 702 of the heat exchanger to the clamping blocks 712a, 712b chassis black the C ring cavity 718 inflow (figa, 7B, 8) in the direction, in General, the arrows 726 (figa). Fluid is then rejected in two channel 730a and 730b (figa, 8) for entry into the housing 708 and passes through the channel 714a, 714b clamping blocks 712a, 712b of the chassis in which the fluid removes heat from heat generating devices 704a, 704b, 704c when passing through the clamping blocks 712a, 712b.

To move the fluid from the housing 708 and from heat generating devices 704a, 704b, 704c housing 708 is equipped with an outlet channel 732 fluid, connected to the channel 714a, 714b, and housing 716 extension 702 of the heat exchanger is equipped with other outlet channel 734 fluid connected to the outlet channel 732 fluid. Channels 732 and 734 can be implemented using thin-walled tubes. When fluid comes out of the channel 714a, 714b, fluid is combined to pass through the outlet channels 732 and 734 of the fluid and on the exit of the extension 702 of the heat exchanger via the outlet port 724 of the fluid. Fluid may then pass through other channels (not shown) for cooling fluid through the heat transfer in the trunk W wells and the reservoir F before injection of the fluid (through, for example, pump 348 figure 3) back into the input hole 722 of the fluid. Fluid passing through the annular cavity 718 inflow of relatively colder fluid, ahadada through the exhaust channel 734 fluid. However, the relatively cooler fluid in the annular cavity 718 may still have some heat, which may optionally be dispersed radially to the shaft W of the well and the reservoir F through one or more radiator sites 738 or the housing 716.

In the shown embodiment, exhaust ports 732 and 734 of the fluid is placed coaxially with blocks 708 and 716. However, in other example implementations exhaust ports 732 and 734 of the fluid can be laid through the housing 708 and 716 otherwise. In addition, although the fluid channel 714a, 714b described uniting in the exhaust channel 732 and 734 of the fluid, in other embodiments of the respective exhaust ports of the fluid can be created for each channel 714a, 714b, to fluid channel 714a, 714b are not United in buildings 708 and 716 or merged into some other point 708 buildings and/or 716.

Relative to the clamping block 712a, 712b of the chassis connected to the housing 708, to improve the heat transfer coefficient from the clamping blocks 712a, 712b of the chassis in the fluid passing through the channels 714a, 714b, and the overall efficiency of heat transfer which is an example of a device 700, the channel 714a, 714b is equipped with the corresponding protrusions 742, essentially identical, or identical to the protrusions 442 figa, 6B, 6C. In addition, extension 702 of the heat exchanger is equipped with what istupati 746, essentially the same or identical to the protrusions 742 and 442. On Fig shows an isometric view of one of the protrusions 746, designed as an annular ledge in the annular cavity 718 flow.

In the shown figa example, pinch blocks 712a, 712b of the chassis is installed on the housing 708 with the corresponding springs 752a, 752b and 754a, 754b compression. Specifically, springs 752a, 752b are located between the housing 708 and the holding block 712a chassis for applications outward force to the clamping block 712a chassis, causing thermal contact with the external surface 756 of the clamping block 712a chassis with the inner surface 758 of the housing 760. Similarly, springs 754a, 754b are located between the housing 708 and the holding block 712b chassis for applications outward force to the clamping block 712b chassis, causing thermal contact with the external surface 762 of the clamping block 712b chassis with the inner surface 758 of the housing 760. Thus, the housing 760 can be used as a heat sink (e.g., radiator 344 described above in relation to figure 3), heat dissipation from the clamping blocks 712a, 712b of the chassis in the trunk W wells and reservoir F.

Although the devices 400 and 700 described above as having respective clamping blocks 412a, 412b and 712a, 712b of the chassis, in other embodiments of the signs and designs (e.g., channels, ribs (partition walls), and the like) clamping the components is 412a, 412b and 712a, 712b of the chassis can be made as a single unit with the respective housings 408. Thus, is an example of a device to perform functions and operations described above can be implemented without a separate clamping units chassis.

Figure 9 shows a graph 900 of the relationship between the temperature of the heat generating device (for example, one of the heat generating devices 402a, 402b. 402c figure 4) and the flow rate of the fluid through which the example device 400 figure 4. Graph 900 has a curve 902 of the temperature dependence of the device, which is similar with the example device 400, but without walls 442, and a curve 904 temperature dependence which is an example of a device 400 with partitions 442. Both curves 902 and 904 of the temperature dependence shows that the temperature of the heat generating devices 402a, 402b, 402c decrease with increasing flow rate of the fluid through the appropriate device. However, curve 904 temperature dependence shows that the equipment walls 442 device 400 reduces the overall temperature of the device 400 to about 15-20C.

Figure 10 shows a diagram of a sequence of stages of a method that can be used to dissipate heat from a device 400 figure 4 and/or device 700 7. In some embodiments of the method of figure 10 can be real is sovan using machine-readable instructions, containing a program for execution by a processor or controller (for example, the controller 308 figure 3). The program may be implemented in software, stored on a tangible medium such as a compact disk, computer floppy disk, hard disk, digital versatile disk or storage device (e.g., electronically erasable programmable continually storage device/system 302 electronic equipment figure 3)associated with the controller 308 and/or implemented in hardware and the software and/or special hardware is well known manner. Additionally, although which is the example program described in the precedence diagram shown in figure 10, the specialist in the art it should be clear that many other ways of commissioning of the device 400 can be used alternatively. For example, you can change the execution order of blocks, and/or some of the described blocks can be edited, deleted or merged. Method figure 10 is described with reference to the device 400 figure 4 and the system 302 electronic equipment, pump 348 and temperature sensors 352 and 354 figure 3. However, the method of figure 10 can also be implemented with respect to the device 700 Fig.7.

As shown in detail in figure 10, initially, the controller 308 measures the temperature of the clamping blocks 412a, 412b of the chassis (figure 4) and the temperature of the barrel W wells at stage 1002 using, for example, temperature sensors 352 and 354. The controller 308 then determines the setting of flow rate on the pump 348 on the basis of the measured temperatures at the stage 1004. For example, the controller 308 can execute the instructions in the electronically erasable programmable continually storage device/system 302, causing the selection controller 308 is configured regarding poor performance, if the clamping blocks 412a, 412b chassis have a relatively low or relatively high flow adjustment, if the clamping blocks 412a, 412b chassis have a relatively high temperature.

At stage 1006, the controller 308 then adjusts the pump 348 (3) for pumping the fluid with a flow rate of the pump is determined at stage 1004. When the pump 348 operates, fluid is pumped into the device 400 through the inlet 416 of the fluid (figa and 4B) in the housing 408 (figa) and through the channels 414a, 414b of the clamping unit chassis at the stage 1008. In the example shown figa, 5, and 6A-6C fluid passes through the inlet 416 of the fluid in the housing 408, included in the channel 414a clamping unit chassis through the inlet 516 clamping unit chassis (figa, 5 and 6A-6C), out of the channel 414a clamping unit chassis through the outlet 518 clamping unit chassis (figa, 5 and 6A-6C) and uhodit channel 414b clamping block 412b chassis (figa).

When fluid passes through the channels 414a, 414b of the clamping unit chassis, heat is transferred from the heat generating devices 402a, 402b, 402c in the fluid at the stage 1010. For example, when fluid passes through the channel 414a of the clamping block, a wall 602 of the clamping block (FIGU, 6C) and partitions 442 (figa, 6B, 6C) transfer heat from heat generating devices 402a, 402b in the fluid. In addition, baffles 442 cause mixing of the fluid when passing through the channels 414a, 414b. When fluid passes through the channels 414a, 414b, some of the heat transferred to the fluid that is transferred from the fluid in the barrel W wells and the reservoir F through the mounting pressure blocks 412a, 412b chassis on stage 1012. For example, when fluid passes through the presser block 412a chassis, part of the heat is transferred from the fluid to the wall 608 of the clamping unit, which is in thermal contact with the casing 406. In this mode, the cover 406 functions as a radiator (for example, the radiator 344 figure 3), which transfers heat radially outward in the trunk W wells and reservoir F.

Fluid then exits the housing 408 on stage 1014 via the outlet port 418 of the fluid and moves to step heat dissipation of the fluid. The heat is then dissipated from the fluid at the stage 1016. In some embodiments of the dissipation of the fluid can be the implemented using devices of the passive heat transfer, for example, extension 702 of the heat exchanger 7, to dissipate the heat in the trunk W wells and the reservoir F through, for example, radial heat transfer, directed outwards. In other embodiments of stage heat dissipation fluid medium may be implemented using a simpler configuration heat dissipation or a more complex configuration heat dissipation. In any case, after the dissipation of heat from the fluid, the pump 348 (3) again pumps the fluid to the inlet 416 of the housing (figa and 4B) and channels 414a, 414b on stage 1018 for re-circulation of fluid through the housing 408 to transfer additional heat from the heat generating devices 402a, 402b, 402c in the fluid. Then the stage 1008, 1010, 1012, 1014, 1016 and 1018 are repeated.

At stage 1008, 1010, 1012, 1014, 1016 and 1018, as described above, the controller 308 (3) monitors the temperature of the barrel W wells using a temperature sensor 354 and one or both clamping blocks 412a, 412b chassis using one or more sensors, essentially identical, or identical temperature sensor 352 (3) for capacity control of the pump 348. Specifically, the controller 308 performs stage 1020, 1022, 1024, 1026, 1028 and 1030, as described below. Initially, at stage 1020, the controller 308 determines whether to check the temperature STV the La W of the well and the pressure block 412a, 412b chassis. For example, the controller 308 may be performed to measure temperatures at predetermined intervals. If the controller 308 determines that there is no need to check the temperature regulation remains at the stage 1020, until the time of measurement of temperature.

When the controller 308 determines that you should check the temperature controller 308 measures the temperature at the stage 1022 and determines on the basis of a measurement of temperatures, whether to adjust the flow rate of the pump 348 at the stage of 1024. For example, the controller 308 may be performed to reduce the volume can be adjusted on the pump 348, when the temperature of the Chuck blocks 412a, 412b chassis are below the threshold values of the temperature increase of the discharge setting, when temperatures are higher than the same or a different threshold temperature. In addition, or alternatively, the controller 308 may be performed to increase the flow rate on the pump 348, when the temperature of the barrel W well above the threshold temperature, and reduce the flow when the temperature of the barrel W wells less than or equal to the same or a different threshold temperature value. The algorithm used to adjust the cost of the pump, can be implemented, as necessary, to match the specific implementation options and different configurations of the clamping blocks chassis and devices Russ is heat-air traffic management, which may be the same or different from the device 400 figure 4 or the device 700 Fig.7.

If the controller 308 determines at the stage of 1024, which should adjust the flow rate on the pump 348, the controller 308 adjusts the flow adjustment on the pump at the stage 1026. After adjustment, the controller 308 volume can be adjusted on the pump at the stage 1026, or if the controller 308 determines that there is no need to adjust the flow adjustment on the pump at the stage of 1024, the controller 308 determines whether to stop the pump 348 on stage 1028. If the controller 308 determines what is to stop the pump 348 should not, control passes back to the step 1020. Otherwise, if the controller 308 determines that it should stop the pump 348, the controller 308 stops the pump 348 on stage 1030. For example, the controller 308 may determine that it should stop the pump 348, if the controller 308 receives the stop command (from a timer or other signal or from the operator). After the controller 308 stops the pump 348, the method ends figure 10.

Although some methods, devices and conditions of manufacture described herein, the scope of this patent is not restricted by them. On the contrary, this patent covers all methods, apparatus and conditions of manufacture, clearly corresponding to the volume of the accompanying claims as literally, and according to the SNO doctrine of equivalents.

1. The device for heat dissipation in the downhole tool containing a clamping block having an inlet opening of the fluid Rethimno United with the outlet of the fluid downhole tubular element, the outlet of the fluid Rethimno connected with the inlet of the fluid downhole tubular element, and a channel passing between the inlet of the fluid pressure unit and the outlet of the fluid pressure unit and which includes passing inside ledge intended to transfer heat from the heat generating element in the fluid passing through the channel.

2. The device according to claim 1, additionally containing downhole tubular element.

3. The device according to claim 1 or 2, in which the clamping unit is connected to the heat generating element.

4. The device according to claim 1, in which the heat generating element includes at least one of the following: an electronic circuit, the engine and the AC generator.

5. The device according to claim 1, additionally containing a radiator and at least one compression spring, deflecting the retainer block to the radiator.

6. The device according to claim 5, in which the heat sink includes a sleeve surrounding the site of a housing of the downhole tubular element.

7. The device according to claim 1, additionally containing the pump, the guy who replicase associated with the channel.

8. The device according to claim 1, additionally containing a compensator for maintaining the pressure of the fluid in the channel, essentially equal to atmospheric pressure in a downhole tubular element.

9. The device according to claim 1, additionally containing the controller and the sensor, the controller configured to control the flow of fluid through the channel based on a specific temperature sensor.

10. Method of heat dissipation, containing the admission of fluid into the channel through the inlet of the fluid Rethimno United with the outlet of the fluid downhole tubular element;
heat transfer from the heat generating element in the fluid in the channel passing through the inside ledge of the channel;
the release of fluid from the channel through the outlet of the fluid Rethimno connected with the inlet of the fluid downhole tubular element.

11. The method according to claim 10, in which use heat generating element, which includes at least one of the following:
the electronic circuit, the engine and the AC generator.

12. The method according to PP and 11, in which the reception of a fluid medium in the channel and release the fluid from the channel contains an action pump for pumping the fluid in the channel and pumping the fluid out of the channel, respectively.

13. The method according to claim 10, further the part containing the definition of the temperature sensor and regulating the flow of fluid through the channel on the basis of a certain temperature.



 

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EFFECT: higher efficiency.

3 cl, 1 dwg, 1 tbl

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