CN217151884U - Hairbrush speed-increasing type ice-sealing core-taking mechanism for accelerating formation of ice valve - Google Patents

Abstract

The utility model discloses a brush speed-increasing formula is with higher speed and is formed ice-sealed mechanism of getting core of ice valve belongs to sandstone uranium deposit drilling tool technical field, including the core barrel, the outer tube of mechanism is got to ice-sealed, the bit body, the refrigerant circulation pore, the ice valve pipe, the evaporation chamber, adiabatic heat preservation, the sealing washer, hinder thermal joint, brush and brush ring, in core barrel and ice valve pipe, outer union coupling, leave refrigerant circulation pore on the ice valve pipe outer tube, low temperature after the capillary throttle, the liquid refrigerant of low pressure gets into the evaporation chamber and evaporates the refrigeration, brush and brush ring are joined in marriage and are fixed in ice valve pipe and hinder the thermal joint bottom, guarantee to creep into in-process rock core and can get into in the core barrel smoothly, and obstruct the natural convection who produces because of temperature change through the brush device, weaken the vertical to cold volume loss of ice valve pipe department, the formation of ice valve pipe department ice valve with higher speed.

Description

Hairbrush speed-increasing type ice-sealing core-taking mechanism for accelerating formation of ice valve

Technical Field

The utility model belongs to the technical field of sandstone uranium deposit drilling tool technique and specifically relates to a hairbrush speed-increasing formula is with higher speed and is got core mechanism to ice that forms ice valve.

Background

Most sandstone uranium ores are argillaceous conglomerates and sandstone formations, the cementation degree is generally poor, even some conglomerates and sandstone formations are very loose, and a rock core is easy to be eroded by flushing fluid in the drilling and coring process, so that the problem of low rock core sampling rate is caused; when the sand bed of weak gluing, gravel rock stratum and boulder layer were used, the loose breakage of rock core, it is difficult to avoid the rock core to drop to adopt current rock core card to get the mode, causes to get the rhythm of the heart not high, and it is difficult to guarantee to get the heart. At present, the ice valve has good sealing performance and a simple generation principle, and gradually replaces a traditional mechanical coring device, but the ice valve is obviously influenced by heat when generated, so that the ice valve is slow in growth and development due to excessive cold loss, the operation time at the bottom of a well is prolonged, and the risk of underground accidents is increased.

SUMMERY OF THE UTILITY MODEL

To ordinary ice valve generate device ice valve growth rate slow, receive environmental impact big, when not freezing rock core easily drop the scheduling problem completely, the utility model aims to provide a novel can be used to solve ordinary ice valve generate device ice valve growth rate slow, receive environmental impact big, when not freezing rock core easily drop the scheduling problem the brush speed-up formula of brush of problem get core mechanism with higher speed formation ice valve.

In order to achieve the purpose, the utility model is realized by the following technical scheme: brush acceleration formula is accelerated to form ice of ice valve and is got core mechanism, get core mechanism outer tube and bit body including core barrel, ice and seal, the outer tube of core mechanism is got with the coaxial and threaded connection of bit body to the ice and seals, and the work end of bit body is provided with the drill bit tooth, and the water jet hole has been seted up to the inside of bit body, its characterized in that, the ice seals and gets core mechanism still includes: the device comprises a copper pipe pore passage, a first capillary pore passage, a second capillary pore passage, an ice valve pipe outer pipe, a heat insulation layer, an ice valve pipe inner pipe, a heat resistance joint, a brush and a brush ring, wherein the ice valve pipe outer pipe and a core pipe are coaxially arranged and are in threaded connection with the lower end of the core pipe, the ice valve pipe outer pipe and the ice valve pipe inner pipe are coaxially and concentrically arranged, the ice valve pipe outer pipe and the ice valve pipe inner pipe are matched through a sealing ring, the ice valve pipe outer pipe and the ice valve pipe inner pipe jointly form an ice valve pipe, an annular gap between the ice valve pipe outer pipe and the ice valve pipe inner pipe is an evaporation cavity, two groups of different pore passages are arranged on the ice valve pipe outer pipe, the first group of pore passages is a first capillary pore passage, and the first capillary pore passage is communicated with the evaporation cavity; the second group of the pore passages consist of a copper pipe pore passage and a second capillary pore passage positioned below the copper pipe pore passage, the diameter of the copper pipe pore passage is larger than that of the second capillary pore passage, and the copper pipe pore passage and the second capillary pore passage are communicated with the evaporation cavity in sequence; the heat insulation layer is coated outside the outer pipe of the ice valve pipe; the heat-resistant joint is used for connecting the ice valve pipe and the bit body, the heat-resistant joint, the ice valve pipe outer pipe, the ice valve pipe inner pipe and the bit body are coaxially arranged, the heat-resistant joint is in threaded connection with the ice valve pipe outer pipe, and the bottoms of the ice valve pipe outer pipe and the ice valve pipe inner pipe are tightly abutted against steps in the heat-resistant joint; the brush and the brush ring are tightly matched through compaction to form a brush device, the whole brush device is in a circular ring shape, and the brush device and the drill bit body are coaxially arranged.

Furthermore, the diameter of the copper pipe pore canal is 2 mm-4 mm, so that the copper pipe pore canal is matched with a refrigeration system pipeline, and the smooth circulation of a refrigerant is ensured.

Furthermore, the diameters of the first capillary channel and the second capillary channel are equal, and are 0.5 mm-1.5 mm, so that the capillary channel can smoothly enter the capillary channel, the capillary channel in the device is protected, and the first capillary channel and the second capillary channel can guarantee the precision through electric spark machining.

Further, the outer edge of the first capillary channel and the outer edge of the evaporation cavity are on the same straight line; the outer edge of the copper pipe pore passage, the outer edge of the second capillary pore passage and the outer edge of the evaporation cavity are on the same straight line, so that the radial size is reduced, the circulation of a refrigerant in the refrigeration process is not hindered, and the flow loss caused by the change of the flow cross-sectional area is reduced.

Furthermore, annular grooves are formed in the inner wall of the outer pipe of the ice valve pipe and the outer wall of the inner pipe of the ice valve pipe, and the thread pitch of the annular grooves is 6-10 mm. The refrigerant is ensured to be fully evaporated in the circulating process, and the poor refrigeration effect and the uneven growth of the ice valve caused by incomplete evaporation of the liquid refrigerant are prevented. Meanwhile, the refrigerant oil and the like can be close to one side of the outer wall of the ice valve pipe under the action of centripetal force, the refrigerant close to the inner wall side of the ice valve pipe can be evaporated more fully, and the refrigeration efficiency is improved.

Further, adiabatic heat preservation adopts aerogel heat insulation material layer, and thickness is 1.5mm ~ 2mm, and adiabatic heat preservation thickness is crossed low and can't play the effect that prevents cold volume loss, and too high also can't continue to improve the heat preservation ability, and can increase radial dimension, is unfavorable for the equipment.

Furthermore, the sealing rings are distributed on the upper side and the lower side of the evaporation cavity and are symmetrically arranged.

Further, the brush ring is the ring annular structure, is provided with the annular that is used for holding the brush root along circumference at the inner wall of brush ring, and the root of brush closely cooperates through the compaction with the brush ring, and the point portion of brush is the free end.

Furthermore, the inner diameters of the drill bit body, the heat-resistant joint, the inner pipe of the ice valve pipe and the brush ring are kept consistent, and the fit clearance is small, so that the core can smoothly enter the core pipe, and blockage or incapability of entering the core can be avoided.

Further, the thickness of the brush ring is 5mm, the thickness of the brush is 2.5 mm-3 mm, the thickness of the brush ring is basically consistent with the gap between the heat-resistant joint and the drill bit, and the brush ring are compacted by utilizing the force between the heat-resistant joint and the drill bit subsequently, so that the effect of accelerating the generation of the ice valve is achieved.

Through the above design scheme, the utility model discloses following beneficial effect can be brought: the utility model discloses can accelerate the formation of ice valve, can effectively solve ordinary ice valve and generate device ice valve growth rate slow, receive the environmental impact big, when not freezing totally rock core easily drop the scheduling problem to reduce borehole operation's time, improve borehole operation benefit.

The further beneficial effects are that:

1. the utility model discloses a thermal insulation layer adopts aerogel thermal insulation material, sets up thickness and is 1.5mm ~ 2mm, has guaranteed that the cold volume scatters and disappears to the outside in the ice valve generation process and reduces, has avoided the icebound to get and has produced the phenomenon of freezing between core mechanism outer tube and the wall of a well.

2. The utility model discloses the internal diameter of drill bit body, hinder hot joint, ice valve intraductal pipe and brush ring keeps unanimous, and the fit clearance has little guaranteed that the rock core gets into the core pipe smoothly, can not appear blocking or the unable entering of rock core.

3. The utility model discloses adopt the forced structure between brush ring and the brush, the brush that can change different length, material satisfies different demands.

4. The utility model discloses the precision is guaranteed through spark-erosion machining in capillary, and the refrigerant adopts R134a, receives environmental impact little, and system stability is high.

5. The utility model discloses hinder thermal-insulated joint and brush ring and all adopt stainless steel, and coefficient of thermal conductivity is low, avoids cold volume transmission to lead to hindering thermal-insulated joint and brush ring department to freeze, leads to cold volume loss.

Drawings

The principles and features of the present invention are further explained below in conjunction with the appended drawings, which form a part of this application, wherein the illustrated embodiments are only used to assist in understanding the present invention, and are not intended to limit the scope of the invention, in which:

fig. 1 is a schematic structural view of the brush speed-increasing type ice-sealing core-taking mechanism for accelerating the formation of the ice valve.

The respective symbols in the figure are as follows: 1-a core tube, 2-an outer tube of an ice-sealing core-taking mechanism, 3-a copper tube channel, 4-a first capillary channel, 5-a second capillary channel, 6-an outer tube of an ice valve tube, 7-an evaporation cavity, 8-a heat-insulating layer, 9-a sealing ring, 10-an inner tube of the ice valve tube, 11-a heat-resistant joint, 12-a bit body, 13-a hairbrush, 14-a hairbrush ring, 15-a water jet hole and 16-bit teeth.

Detailed Description

In order to more clearly illustrate the present invention, the present invention will be further described with reference to the preferred embodiments and the accompanying drawings. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention. In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, the brush speed-increasing type ice-sealed core-taking mechanism for forming an ice valve in an accelerating manner comprises a core barrel 1, an ice-sealed core-taking mechanism outer tube 2, a copper tube hole 3, a first capillary hole 4, a second capillary hole 5, an ice valve outer tube 6, an evaporation cavity 7, a heat insulation layer 8, a sealing ring 9, an ice valve inner tube 10, a heat-resistant joint 11, a bit body 12, a brush 13, a brush ring 14, a water jet hole 15 and bit teeth 16.

The outer tube 2 of the ice-sealing core-taking mechanism is coaxially connected with the bit body 12 through threads; the core tube 1 and the ice valve outer tube 6 are coaxially arranged, and the lower end of the core tube 1 is in threaded connection with the ice valve outer tube 6; two groups of different pore channels are arranged on the outer tube 6 of the ice valve tube, the first group of pore channels are first capillary pore channels 4, the outer edge of the first capillary pore channels 4 is consistent with the outer edge of the evaporation cavity 7, and the capillary tubes can enter the evaporation cavity 7 through the first capillary pore channels 4, so that liquid refrigerants can be sprayed. The second group of the pore passages consist of a copper pipe pore passage 3 and a second capillary pore passage 5 positioned below the copper pipe pore passage 3, the outer edge of the copper pipe pore passage 3 is consistent with the outer edge of the second capillary pore passage 5, the outer edge of the second capillary pore passage 5 is consistent with the outer edge of the evaporation cavity 7, the copper pipe enters the copper pipe pore passage 3 and then reaches the bottom of the pore passage, the second capillary pore passage 5 is a refrigerant circulation passage, the size of the refrigerant circulation passage is consistent with the inner diameter of the copper pipe, and the refrigerant after evaporation can enter the second capillary pore passage 5 from the evaporation cavity 7 and finally enters the interior of the copper pipe in the copper pipe pore passage 3 to enter refrigeration circulation; the outer pipe 6 of the ice valve pipe is coaxially arranged with the core pipe 1 and is in threaded connection with the lower end of the core pipe 1, meanwhile, the outer pipe 6 of the ice valve pipe and the inner pipe 10 of the ice valve pipe are coaxially and concentrically arranged, the outer pipe 6 of the ice valve pipe and the inner pipe 10 of the ice valve pipe are matched through a sealing ring 9, the outer pipe 6 of the ice valve pipe and the inner pipe 10 of the ice valve pipe jointly form the ice valve pipe, an annular gap between the two is an evaporation cavity 7, and the sealing rings 9 are symmetrically arranged on the upper side and the lower side of the evaporation cavity 7; the heat-insulating layer 8, the ice valve pipe inner pipe 10 and the ice valve pipe outer pipe 6 are coaxially arranged, the heat-insulating layer 8 is made of aerogel, the aerogel is coated on the outer side of the ice valve pipe outer pipe 6, the radial size is trimmed after the heat-insulating layer is shaped, and the size of the outer edge of the heat-insulating layer 8 is ensured to be consistent with the maximum size of the outer side of the ice valve pipe outer pipe 6; the thickness of the heat-insulating layer 8 is 1.5-2 mm, so that the loss of the cooling capacity to the outside in the ice valve generating process is reduced, and the freezing phenomenon between the outer pipe 2 of the outer pipe ice-sealing core-taking mechanism and the well wall is avoided. The heat-resistant joint 11 is used for connecting the ice valve pipe with the bit body 12, the heat-resistant joint 11, the ice valve pipe outer pipe 6, the ice valve pipe inner pipe 10 and the bit body 12 are coaxially arranged, the heat-resistant joint 11 is in threaded connection with the ice valve pipe outer pipe 6, and the bottoms of the ice valve pipe outer pipe 6 and the ice valve pipe inner pipe 10 are tightly abutted against steps in the heat-resistant joint 11; the brush 13 is a close fit with the brush ring 14 by compaction and is arranged coaxially with the bit body 12. The inner diameters of the drill bit body 12, the heat-resistant joint 11, the ice valve pipe inner tube 10 and the brush ring 14 are kept consistent, and the fit clearance is small, so that the core can smoothly enter the core tube 2, and blockage or incapability of entering the core can be avoided. The brush ring 14 and the brush 13 are of a press-in type structure, brushes with different lengths and materials can be replaced to meet different requirements, and the brush 13 is made of nylon materials in the embodiment and has a low heat conductivity coefficient and good elasticity. The refrigerant circulation pore passage comprises a copper pipe pore passage 3, a first capillary pore passage 4 and a second capillary pore passage 5, the copper pipe pore passage 3, the first capillary pore passage 4 and the second capillary pore passage 5 are all subjected to electric spark machining to ensure the precision, the refrigerant adopts R134a, the influence of the environment is small, and the system stability is high.

The brush ring 14 is of a circular ring structure, an annular groove used for accommodating the root of the brush 13 is formed in the inner wall of the brush ring 14 along the circumferential direction, the root of the brush 13 is tightly matched with the brush ring 14 through compaction, and the tip of the brush 13 is a free end. The hairbrush 13 is trimmed to a specified length as required, the root of the hairbrush 13 is contacted with the outer edge of the ring groove of the hairbrush ring 14, and the central hole-shaped clearance of the hairbrush device is ensured to be approximate to a circle; the heat-resistant joint 11, the brush ring 14 and the bit body 12 are compressed through threads between the bit body 12 and the outer tube 2 of the ice-sealing core-taking mechanism, so that the brush ring 14 and the inner brush 13 are compacted, and the brush 13 is prevented from falling off in the using process.

The ice valve pipe is constituteed jointly with ice valve intraductal pipe 10 to ice valve pipe outer tube 6, and annular space between the two is evaporation chamber 7, and the refrigerant evaporates here, adopts the components of a whole that can function independently design can conveniently change the intraductal pipe 10 of ice valve of different materials and refrigerant circulation passageway, and the design of ice valve outside of tubes pipe 6 has refrigerant circulation passageway, and the outside scribbles adiabatic heat preservation 8, plays the effect that prevents cold volume loss.

The diameter of the copper pipe pore passage 3 is 2 mm-4 mm, the diameters of the first capillary pore passage 4 and the second capillary pore passage 5 are equal, and the diameters are 0.5 mm-1.5 mm, so that the refrigerant can smoothly circulate in the system, the liquid refrigerant can generate phase change heat absorption due to volume and temperature change after entering the evaporation cavity 7, the temperature can be reduced to about minus 25 ℃, the rock core and the internal liquid are frozen and tightly adhered to the contact surface of the ice valve pipe inner pipe 10 and the frozen liquid, and the successful coring is ensured.

The brush 13 and the brush ring 14 jointly form a brush device, and the core firstly passes through the brush device after passing through the bit body 12 and then sequentially enters the heat insulation resistance joint 11, the interior of the ice valve pipe inner pipe 10 and the core pipe 1.

The utility model discloses the work process that the brush acceleration formula forms the ice of ice valve with higher speed and seals the mechanism of getting the core as follows: the refrigeration system is kept closed in the drilling process, when a rock core begins to be collected, the rock core begins to enter the drill bit body 12, the brush device, the heat resistance joint 11, the ice valve pipe inner pipe 10 and the rock core pipe 1, the brush 13 is bent due to the material property of the brush in the process and cannot hinder the entry of the rock core, the drill tool is slightly lifted after the rock core enters the rock core pipe 1, the bottom of the rock core is clamped off at the moment, the brush 13 rebounds due to the elasticity of the brush to play a certain supporting and lifting role, the loose rock core is guaranteed not to fall off from an annular gap among the rock core pipe 1, the ice valve pipe, the heat resistance joint 11 and the like, then the refrigeration system is started, the refrigerant firstly enters the evaporation cavity 7 through the first capillary channel 4 under the action of the compressor to perform phase change heat absorption, the low-temperature liquid refrigerant is converted into the low-temperature low-pressure gaseous refrigerant, and the gaseous refrigerant can enter the return pipeline and the compressor through the second capillary channel 5 and the copper pipe channel 3 to complete refrigeration and refrigeration in the compressor Circulation, the phenomenon of natural convection takes place for the cold volume because the density increase in refrigeration process, brush 13 department can be assembled along vertical direction to a large amount of cold volumes, because brush 13 itself has good adiabatic property, cold volume can't pass through brush 13, and brush ring 14 has lower coefficient of heat conductivity equally, the low coefficient of heat conductivity that the stainless steel material that utilizes the nylon material that brush 13 adopted and brush ring 14 adopted has, cold volume can't continue downward transmission again, will concentrate on the inside of brush 13 and ice valve pipe inner tube 10, the formation of ice valve can be accelerated to more cold volume, reduce borehole operation's time.

Claims (10)

1. Brush acceleration formula is accelerated to form mechanism of coring of iced encapsulation of ice valve, get mechanism outer tube (2) and bit body (12) including core barrel (1), iced encapsulation is got mechanism outer tube (2) and is coaxial and threaded connection with bit body (12), and the work end of bit body (12) is provided with bit tooth (16), and water jet hole (15), its characterized in that have been seted up to the inside of bit body (12), the mechanism of coring of iced encapsulation still includes: the device comprises a copper pipe pore passage (3), a first capillary pore passage (4), a second capillary pore passage (5), an ice valve pipe outer pipe (6), a heat insulation layer (8), an ice valve pipe inner pipe (10), a heat resistance joint (11), a brush (13) and a brush ring (14), wherein the ice valve pipe outer pipe (6) and a core pipe (1) are coaxially arranged, and is in threaded connection with the lower end of the core tube (1), an outer tube (6) of the ice valve tube and an inner tube (10) of the ice valve tube are coaxially and concentrically arranged, the outer tube (6) of the ice valve tube and the inner tube (10) of the ice valve tube are matched through a sealing ring (9), the ice valve pipe outer pipe (6) and the ice valve pipe inner pipe (10) jointly form an ice valve pipe, an annular gap between the ice valve pipe outer pipe and the ice valve pipe inner pipe is an evaporation cavity (7), two groups of different pore passages are arranged on the ice valve pipe outer pipe (6), the first group of pore passages are first capillary pore passages (4), and the first capillary pore passages (4) are communicated with the evaporation cavity (7); the second group of the pore passages consist of a copper pipe pore passage (3) and a second capillary pore passage (5) positioned below the copper pipe pore passage (3), the diameter of the copper pipe pore passage (3) is larger than that of the second capillary pore passage (5), and the copper pipe pore passage (3) and the second capillary pore passage (5) are sequentially communicated with the evaporation cavity (7); the heat insulation layer (8) is coated outside the outer pipe (6) of the ice valve pipe; the heat-resistant joint (11) is used for connecting the ice valve pipe and the bit body (12), the heat-resistant joint (11), the ice valve pipe outer pipe (6), the ice valve pipe inner pipe (10) and the bit body (12) are coaxially arranged, the heat-resistant joint (11) is in threaded connection with the ice valve pipe outer pipe (6), and the bottoms of the ice valve pipe outer pipe (6) and the ice valve pipe inner pipe (10) are tightly abutted to steps inside the heat-resistant joint (11); the brush (13) and the brush ring (14) are tightly matched through compaction to form a brush device, the whole brush device is in a ring shape, and the brush device and the bit body (12) are coaxially arranged.

2. The brush accelerated speed ice-capping and core-picking mechanism for forming an ice valve according to claim 1, wherein: the diameter of the copper pipe pore canal (3) is 2 mm-4 mm.

3. The brush accelerated speed ice-capping and core-picking mechanism for forming an ice valve according to claim 1, wherein: the diameters of the first capillary channel (4) and the second capillary channel (5) are equal, and the diameters are 0.5 mm-1.5 mm.

4. The brush accelerated speed ice-capping and core-picking mechanism for forming an ice valve according to claim 1, wherein: the outer edge of the first capillary channel (4) and the outer edge of the evaporation cavity (7) are on the same straight line; the outer edge of the copper pipe channel (3), the outer edge of the second capillary channel (5) and the outer edge of the evaporation cavity (7) are on the same straight line.

5. The brush accelerated speed ice-capping and core-picking mechanism for forming an ice valve according to claim 1, wherein: annular grooves are formed in the inner wall of the outer pipe (6) of the ice valve pipe and the outer wall of the inner pipe (10) of the ice valve pipe, and the thread pitch of the annular grooves is 6-10 mm.

6. The brush accelerated speed ice-capping and core-picking mechanism for forming an ice valve according to claim 1, wherein: the heat insulation layer (8) is an aerogel heat insulation material layer with the thickness of 1.5-2 mm.

7. The brush accelerated speed ice-capping and core-picking mechanism for forming an ice valve according to claim 1, wherein: the sealing rings (9) are distributed on the upper side and the lower side of the evaporation cavity (7) and are symmetrically arranged.

8. The brush accelerated speed ice-capping and core-picking mechanism for forming an ice valve according to claim 1, wherein: the brush ring (14) is of a circular ring structure, an annular groove used for containing the root of the brush (13) is formed in the inner wall of the brush ring (14) along the circumferential direction, the root of the brush (13) is tightly matched with the brush ring (14) through compaction, and the tip of the brush (13) is a free end.

9. The brush speed-increasing type acceleration ice-sealing core-picking mechanism for forming the ice valve according to claim 1 or 8, characterized in that: the inner diameters of the drill bit body (12), the heat-resistant joint (11), the inner pipe (10) of the ice valve pipe and the brush ring (14) are kept consistent.

10. The brush accelerated speed ice-capping and core-picking mechanism for forming an ice valve according to claim 1, wherein: the thickness of the brush ring (14) is 5mm, and the thickness of the brush (13) is 2.5 mm-3 mm.

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