CN212428629U - Temperature control drill rod - Google Patents
Temperature control drill rod Download PDFInfo
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- CN212428629U CN212428629U CN202022116142.8U CN202022116142U CN212428629U CN 212428629 U CN212428629 U CN 212428629U CN 202022116142 U CN202022116142 U CN 202022116142U CN 212428629 U CN212428629 U CN 212428629U
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Abstract
The utility model provides a accuse temperature drilling rod relates to oil drilling mechanical equipment field, and this accuse temperature drilling rod is the tubulose and has the water conservancy diversion chamber that the axial link up, and accuse temperature drilling rod includes inner tube, insulating layer and the outer tube that the cover was established from inside to outside in proper order, and the inner chamber of inner tube forms the water conservancy diversion chamber, and the coefficient of heat conductivity of insulating layer is less than the coefficient of heat conductivity of outer tube. The utility model provides a accuse temperature drilling rod can reduce the transmission of stratum heat to the drilling fluid in the drilling rod, reduces bottom hole temperature.
Description
Technical Field
The utility model relates to an oil drilling mechanical equipment field, in particular to accuse temperature drilling rod.
Background
Drill pipe is an essential component of drill strings, which plays a very important role in oil drilling. The main functions of the drill pipe are to transmit torque and convey drilling fluid, and the borehole is continuously deepened by gradually lengthening the drill pipe. The drill pipe is a conveying channel of the drilling fluid, and the drilling fluid descends along an inner cavity of the drill pipe, passes through the drill bit after reaching the bottom of the well, then ascends along an annular space formed between the outer surface of the drill pipe and the borehole, and returns to the wellhead. As the depth of the well bore is deepened, the temperature of the stratum is gradually increased, and therefore during the descending process of the drilling fluid, the heat of the stratum is transmitted to the drilling fluid in the inner cavity of the drill rod through the wall of the well bore, the annular space and the tube body of the drill rod, so that the temperature of the drilling fluid is gradually increased. For some deep wells and ultra-deep wells, the excessively high bottom temperature has great harm to the performance of drilling fluid, downhole tools and instruments. Specifically, the viscosity, density and rock-carrying performance of the drilling fluid are reduced along with the increase of temperature, the stability of the well wall is reduced, the service life of a downhole tool, particularly a screw drill containing a rubber member, is reduced along with the increase of temperature, the precision and the service life of a downhole instrument are also reduced due to high temperature, the drilling efficiency and safety are finally influenced, and the operation cost is increased. In addition, for some extra-deep wells (the bottom temperature reaches more than 260 ℃) and geothermal wells (the dry heat rock is more than 350 ℃), the ultrahigh temperature of the bottom of the well means that the prior art cannot realize drilling operation and is the bottleneck of drilling, so that the exploration, development and utilization of underground resources are restricted.
In view of the above, the inventor designs a temperature control drill rod through repeated experiments according to production design experiences in the field and related fields for many years, so as to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a accuse temperature drilling rod can reduce the transmission of stratum heat to the drilling fluid in the drilling rod, reduces the shaft bottom temperature.
In order to achieve the above object, the utility model provides a accuse temperature drilling rod, wherein, accuse temperature drilling rod is the tubulose and has the water conservancy diversion chamber that the axial link up, accuse temperature drilling rod includes inner tube, insulating layer and the outer tube that the cover was established from inside to outside in proper order, the inner chamber of inner tube forms the water conservancy diversion chamber, the coefficient of heat conductivity of insulating layer is less than the coefficient of heat conductivity of outer tube.
The temperature-control drill pipe as described above, wherein the thermal conductivity of the thermal insulation layer is smaller than the thermal conductivity of the inner pipe.
The temperature-control drill rod is characterized in that an annular accommodating space is formed between the inner pipe and the outer pipe in a surrounding manner at intervals, two ends of the accommodating space are closed, and the heat insulation layer is filled in the accommodating space.
The temperature control drill rod comprises an outer pipe, a first installation part, an outer pipe main body and a second installation part, wherein the outer pipe comprises the first installation part, the outer pipe main body and the second installation part which are axially arranged, the inner diameter of the first installation part and the inner diameter of the second installation part are respectively smaller than the inner diameter of the outer pipe main body, two ends of the inner pipe are respectively connected with the first installation part and the second installation part in a sealing mode, the inner pipe and the outer pipe main body are enclosed to form an accommodating space, and the heat insulation layer is filled in the accommodating space.
The accuse temperature drilling rod as above, wherein, first installation department has spacing boss, the internal diameter of spacing boss is less than the internal diameter of first installation department forms spacing step, the one end top of inner tube is supported on the spacing step, wear to be equipped with the spacing ring in the second installation department, the spacing ring top is supported on the other end of inner tube, just the outer wall of spacing ring with the inner wall interference fit of second installation department.
The temperature control drill rod comprises an outer pipe body, wherein two through holes communicated with the accommodating space are formed in the outer walls of the two ends of the outer pipe body, plugging pieces are detachably mounted in the through holes, and the corresponding through holes can be sealed by the plugging pieces.
The temperature control drill rod is characterized in that the first installation part and the second installation part are respectively provided with a joint for connection.
The temperature-control drill rod is characterized in that the thermal insulation layer is made of resin or fiber reinforced resin composite material.
The temperature control drill rod is characterized in that the thermal conductivity coefficient of the thermal insulation layer is 0.1-0.5W/m.K.
The temperature-control drill rod is characterized in that the thickness of the heat-insulating layer is 2-10 mm.
Compared with the prior art, the utility model has the following characteristics and advantages:
the utility model provides a accuse temperature drilling rod, it has set up the insulating layer between outer tube and inner tube. Because the thermal conductivity of the heat-insulating layer is lower, the total thermal conductivity of the whole temperature-control drill rod is reduced, and the heat transfer resistance of the temperature-control drill rod is increased. Due to the existence of the heat insulation layer, the temperature control drill rod can block the heating of the formation heat to the downlink drilling fluid in the diversion cavity so as to reduce the temperature of the circulating drilling fluid, particularly greatly reduce the temperature of the drilling fluid at the bottom of the well, solve the technical problems caused by high temperature and ultrahigh temperature at the bottom of the well, overcome the technical bottleneck and widen the drilling range in the prior art.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.
Fig. 1 is a schematic structural view of a temperature-controlled drill rod according to the present invention;
fig. 2 is a schematic view of the accommodating space formed by the inner tube and the outer tube;
fig. 3 is a schematic structural view of the middle and outer tube of the present invention;
FIG. 4 is the structure of the inner tube of the present invention'
Fig. 5 is a sectional view of the medium temperature control drill rod of the present invention.
Description of reference numerals:
100. controlling the temperature of the drill rod; 10. A flow guide cavity;
20. an inner tube; 30. A thermal insulation layer;
40. an outer tube; 41. A first mounting portion;
42. an outer tube body; 43. A second mounting portion;
44. a through hole; 45. A blocking member;
46. a limiting step; 50. An accommodating space;
60. a limit ring.
Detailed Description
The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may be present.
As shown in fig. 1 to 5, the utility model provides a accuse temperature drilling rod 100 is the tubulose and has the water conservancy diversion chamber 10 that the axial link up, and accuse temperature drilling rod 100 includes inner tube 20, insulating layer 30 and the outer tube 40 of establishing from inside to outside in proper order, and the inner chamber of inner tube 20 forms water conservancy diversion chamber 10, and the coefficient of heat conductivity of insulating layer 30 is less than the coefficient of heat conductivity of outer tube 40.
The present invention provides a temperature-controlled drill pipe 100 having a thermal insulation layer 30 disposed between an outer pipe 40 and an inner pipe 20. Because the thermal conductivity of the thermal insulation layer 30 is low, the total thermal conductivity of the whole temperature control drill rod 100 is also reduced, and the heat transfer resistance of the temperature control drill rod 100 is increased. Due to the existence of the heat insulation layer 30, the temperature control drill rod 100 can prevent the heat of the formation from heating the downward drilling fluid in the diversion cavity 10 so as to reduce the temperature of the circulating drilling fluid, particularly greatly reduce the temperature of the drilling fluid at the bottom of the well, solve the technical problems caused by high temperature and ultrahigh temperature at the bottom of the well in the drilling process, overcome the technical bottleneck and widen the drilling range in the prior art.
The utility model provides a accuse temperature drilling rod 100 can reduce the temperature of circulation drilling fluid to guarantee the stability of drilling fluid performance, improved the rock-carrying performance of drilling fluid.
The utility model provides a accuse temperature drilling rod 100 reduces shaft bottom drilling fluid temperature by a wide margin and has expanded the application range of instrument and instrument in the pit, improves the precision and the life-span of instrument and instrument in the pit, reduces the drilling cost.
In an alternative embodiment of the present invention, the thermal conductivity of the thermal insulation layer 30 is also less than the thermal conductivity of the inner tube 20.
In an alternative embodiment of the present invention, the inner tube 20 and the outer tube 40 may be steel tubes, and the thermal insulation layer 30 may be made of a material having a thermal conductivity lower than that of steel.
In an alternative embodiment of the present invention, the thermal insulation layer 30 is a resin thermal insulation layer or a fiber reinforced resin composite thermal insulation layer. In an optional embodiment of the present invention, the thermal conductivity of the thermal insulation layer 30 is 0.1-0.5W/(m · K).
According to the known theory of thermodynamics, the smaller the thermal conductivity of the thermal insulation layer 30 is, the larger the total heat transfer resistance of the temperature control drill rod is, and the better the thermal insulation effect is. When the thermal conductivity of the thermal insulation layer 30 is lower than that of the drill pipe by more than one data magnitude, the temperature control drill pipe can block most of heat from being transferred between the inner surface and the outer surface of the drill pipe.
In an alternative example of this embodiment, the material of the thermal insulation layer 30 is epoxy resin, and the thermal conductivity thereof is about 0.2W/(m · K).
In another alternative example of this embodiment, the thermal insulation layer 30 is a composite material of epoxy resin and glass fiber, and has a thermal conductivity of about 0.4W/(m · K), in which the epoxy resin is used as a matrix material and the glass fiber is used as a reinforcement material.
In an optional embodiment of the present invention, if the thickness of the thermal insulation layer 30 is 2 to 10mm and the thermal insulation requirement of the temperature control drill rod 100 is high, the thickness of the thermal insulation layer 30 is selected to be a large value; if the requirement for thermal insulation of the temperature-controlled drill rod 100 is not high, the value of the thermal insulation layer 30 is selected to be small.
The utility model discloses in, the material and the thickness of insulating layer 30 can be selected according to the control temperature requirement, and the thermal insulation material of different thermal conductivity can be selected according to the needs of actual construction to the technical personnel in the field to design suitable thickness, do not describe herein repeatedly.
In an optional embodiment of the present invention, an annular accommodating space 50 is formed between the inner tube 20 and the outer tube 40, two ends of the accommodating space 50 are sealed, and the heat insulation layer 30 is filled in the accommodating space 50.
In an alternative example of this embodiment, the outer tube 40 includes a first mounting portion 41, an outer tube main body 42 and a second mounting portion 43 sequentially arranged along an axial direction thereof, an inner diameter of the first mounting portion 41 and an inner diameter of the second mounting portion 43 are respectively smaller than an inner diameter of the outer tube main body 42, two ends of the inner tube 20 are respectively connected with the first mounting portion 41 and the second mounting portion 43 in a sealing manner, an accommodating space 50 is defined between the inner tube 20 and the outer tube main body 42, and the accommodating space 50 is filled with the heat insulating layer 30.
Further, first installation department 41 has spacing boss, and the internal diameter of spacing boss is less than the internal diameter of first installation department and forms spacing step 46, and the one end top of inner tube 20 is supported on spacing step 46, wears to be equipped with spacing ring 60 in the second installation department 43, and spacing ring 60 top is supported at the other end of inner tube 20, and the outer wall of spacing ring 60 and the inner wall interference fit of second installation department 43. The limiting step 46 and the limiting ring 60 play a role in axially limiting the inner pipe 20, so that the inner pipe 20 and the outer pipe 40 are prevented from axially moving, and the normal use of the temperature control drill rod 100 is ensured.
In an alternative example of this embodiment, two through holes 44 communicating with the accommodating space 50 are formed in the outer walls of both ends of the outer tube main body 42, a plugging member 445 is detachably mounted in each through hole 44, and each plugging member 45 can close the corresponding through hole 44.
Furthermore, the through hole 44 is a threaded hole, the plugging member 45 is a screw and is in threaded fit with the threaded hole, and the threaded hole can be closed by tightening the screw.
In an alternative example of this embodiment, first mounting portion 41 and second mounting portion 43 each form a joint for connection to facilitate connection of a plurality of temperature controlled drill rods 100 in series, connection of temperature controlled drill rods 100 to other downhole tools.
In an alternative example of this embodiment, the first and second mounting portions 41 and 43 are respectively connected to the outer tube main body 42 by welding.
The utility model discloses still relate to a manufacturing approach of accuse temperature drilling rod for make as above accuse temperature drilling rod 100, this manufacturing approach of accuse temperature drilling rod includes:
step 1, providing an outer tube 40 and an inner tube 20, wherein the inner tube 20 is arranged in the outer tube 40 in a penetrating manner, so that an accommodating space 50 with two closed ends is formed between the inner tube 20 and the outer tube 40 in a spaced and enclosing manner, and two through holes 44 communicated with the accommodating space 50 are formed in the outer wall of the outer tube 40;
step 2, the heat insulating material is in a flowing state and is injected into the accommodating space 50 through a through hole 44;
and 3, after the heat insulation material is injected, closing the two through holes 44, and gradually solidifying the heat insulation material after cooling to form the heat insulation layer 30.
The utility model provides a manufacturing approach of accuse temperature drilling rod assembles outer tube 40 and inner tube 20 earlier, injects thermal insulation material into the accommodation space 50 between outer tube 40 and the inner tube 20 again, waits to form insulating layer 30 after the thermal insulation material solidification. By adopting the method, the thermal insulation layer 30 is prevented from being damaged and extruded when the outer pipe 40 and the inner pipe 20 are assembled, the integrity of the thermal insulation layer 30 is ensured, and the thermal insulation effect of the whole temperature control drill rod 100 is further ensured. The manufacturing method of the temperature control drill rod provided by the utility model has simple steps, and can quickly and conveniently manufacture the temperature control drill rod.
In an alternative embodiment of the present invention, in step 2, the heat insulating material is a liquid resin or a fiber-reinforced resin, and when the resin is a fiber-reinforced resin, the resin is followed by a fluid-solid mixture (the fiber is in a solid state).
In an alternative embodiment of the present invention, in step 2, the heat insulating material is injected into the accommodating space 50 through one through hole 44, and the accommodating space 50 is evacuated through the other through hole 44, so that the heat insulating material is accelerated to fill the accommodating space by means of evacuation and pressurization.
Further, in step 2, the accommodating space 50 is filled with a heat insulating material.
In an optional embodiment of the present invention, in the step 2, the curing agent is mixed into the heat insulating material to form a mixed solution, and then the heat insulating material mixed with the curing agent is injected into the accommodating space 50.
In an alternative example of this embodiment, the curing agent may be a common curing agent known to those skilled in the art, so as to ensure that the heat insulating material can be cured in the accommodating space 50 to form a heat insulating layer, which will not be described herein.
In an alternative embodiment of the present invention, the thermal insulation material forming the thermal insulation layer 30 is a resin or fiber reinforced resin matrix composite.
In an alternative example of this embodiment, the material of the thermal insulation layer 30 is epoxy resin, and the thermal conductivity is about 0.2W/(m · K).
In another alternative example of this embodiment, the thermal insulation layer 30 is a composite material of epoxy resin and glass fiber, and has a thermal conductivity of about 0.4W/(m · K), wherein the epoxy resin is used as a matrix material and the glass fiber is used as a reinforcing material.
In the following description of the embodiments, the invention is described in detail, but the description is not to be construed as limiting the invention for any reason, and in particular, the features described in the different embodiments may be combined with each other as desired, thereby forming other embodiments, and the features are understood to be applicable to any one embodiment and not limited to the described embodiments unless explicitly described to the contrary.
Claims (10)
1. The utility model provides a accuse temperature drilling rod, its characterized in that, accuse temperature drilling rod is the tubulose and has the water conservancy diversion chamber that the axial is link up, accuse temperature drilling rod includes inner tube, insulating layer and the outer tube that from inside to outside overlaps in proper order and establishes, the inner chamber of inner tube forms the water conservancy diversion chamber, the coefficient of heat conductivity of insulating layer is less than the coefficient of heat conductivity of outer tube.
2. The temperature controlled drill pipe of claim 1, wherein the thermal insulation layer has a thermal conductivity less than a thermal conductivity of the inner pipe.
3. The temperature-control drill rod as claimed in claim 1, wherein a space is formed between the inner pipe and the outer pipe and surrounds the inner pipe and the outer pipe to form an annular accommodating space, two ends of the accommodating space are closed, and the heat-insulating layer is filled in the accommodating space.
4. The temperature-control drill rod as claimed in claim 3, wherein the outer tube comprises a first mounting part, an outer tube main body and a second mounting part which are axially arranged, the inner diameter of the first mounting part and the inner diameter of the second mounting part are respectively smaller than the inner diameter of the outer tube main body, two ends of the inner tube are respectively connected with the first mounting part and the second mounting part in a sealing manner, the inner tube and the outer tube main body are enclosed to form the accommodating space, and the accommodating space is filled with the heat-insulating layer.
5. The temperature-control drill rod as claimed in claim 4, wherein the first installation part is provided with a limit boss, the inner diameter of the limit boss is smaller than that of the first installation part to form a limit step, one end of the inner tube abuts against the limit step, a limit ring penetrates through the second installation part, the limit ring abuts against the other end of the inner tube, and the outer wall of the limit ring is in interference fit with the inner wall of the second installation part.
6. The temperature-control drill rod as claimed in claim 4, wherein two through holes communicated with the accommodating space are formed in outer walls of two ends of the outer tube main body, a plugging member is detachably mounted in each through hole, and each plugging member can close the corresponding through hole.
7. The temperature-controlled drill pipe according to claim 4, wherein the first and second mounting portions are each formed with a coupling for connection.
8. The temperature controlled drill pipe of claim 1, wherein the thermal insulation layer is made of a resin or fiber reinforced resin composite.
9. The temperature-controlled drill rod as claimed in claim 1, wherein the thermal conductivity of the thermal insulation layer is 0.1-0.5W/m-K.
10. The temperature-control drill rod as claimed in claim 1, wherein the thermal insulation layer has a thickness of 2-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022116142.8U CN212428629U (en) | 2020-09-24 | 2020-09-24 | Temperature control drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022116142.8U CN212428629U (en) | 2020-09-24 | 2020-09-24 | Temperature control drill rod |
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| Publication Number | Publication Date |
|---|---|
| CN212428629U true CN212428629U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022116142.8U Active CN212428629U (en) | 2020-09-24 | 2020-09-24 | Temperature control drill rod |
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| CN (1) | CN212428629U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293925A (en) * | 2021-12-30 | 2022-04-08 | 中海石油(中国)有限公司深圳分公司 | Ultra-large-diameter heat-insulating sleeve for offshore oil exploitation and production process thereof |
-
2020
- 2020-09-24 CN CN202022116142.8U patent/CN212428629U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293925A (en) * | 2021-12-30 | 2022-04-08 | 中海石油(中国)有限公司深圳分公司 | Ultra-large-diameter heat-insulating sleeve for offshore oil exploitation and production process thereof |
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