CN219910687U - Purifying device capable of cooling drilling fluid - Google Patents

Abstract

The utility model relates to a purifying device capable of cooling drilling fluid, which comprises an overflow output pipeline communicated with an overflow port of a drilling well, wherein the output end of the overflow output pipeline is connected with a first cooling component, the output end of the first cooling component is provided with a screening component, a screening cavity of the screening component is connected with an exhaust pipeline of a second cooling component, and the exhaust pipeline is arranged below a screen mesh of the screening component, so that cooling air flow directionally output by the second cooling component can cool the drilling fluid in the screening cavity while reversely blowing and dredging the screen mesh of the screening component; the first cooling component is characterized in that a plurality of parallel branch pipes and first cooling branch pipes wrapping the branch pipes are defined by the first cooling component and are distributed in an annular array arrangement mode, and second cooling branch pipes are further arranged in middle holes of a ring body formed by the branch pipes and the first cooling branch pipes.

Description

Purifying device capable of cooling drilling fluid

Technical Field

The utility model relates to the technical field of circulating drilling fluid treatment equipment, in particular to a purifying device capable of cooling drilling fluid.

Background

Drilling fluid is a circulating flushing medium used in the hole during drilling. Drilling fluid is the blood of a well, also known as a drilling fluid. The drilling fluid can be divided into clear water, slurry, clay-free phase flushing fluid, emulsion, foam, compressed air and the like according to the components. When returning from the wellhead, the drilling fluid can carry a large amount of heat, so in order to ensure that the recycled drilling fluid can be subjected to purification treatment in the purification equipment, so that the high-temperature fluid is prevented from causing overheat damage to the purification device and the service life of parts is shortened abnormally, and the returned drilling fluid is usually required to be subjected to cooling treatment.

For example, the prior art patent with publication number CN113775307a discloses a drilling mud liquid cooling device, including sieve fill, receiving fill and cooling device, receiving fill and sieve fill are cell body shape and notch all up, the sieve fill is located the top of receiving fill, the lower extreme of receiving fill is equipped with the grout outlet rather than inside intercommunication, the sieve mesh that runs through from top to bottom is covered on the diapire of sieve fill, cooling device sets up one side between receiving fill and the sieve fill, the drilling mud thick liquid that well drilling well head overflowed discharges to in the sieve fill to fall through the sieve mesh after filtering the particulate dregs in the drilling mud thick liquid by the sieve fill in the receiving fill, cooling device is used for cooling down to the drilling mud thick liquid of whereabouts, so can filter the drilling mud thick liquid by the sieve fill, and the filter hole on the sieve fill makes the drilling mud thick liquid take the line form to flow through between sieve fill and the receiving fill, again is cooled down to the drilling mud thick liquid after filtering, and its cooling effect is good, and the drilling mud thick liquid disperses evenly between sieve fill and receiving fill. However, the cooling device still has uneven refrigeration, especially the part of the cooling liquid falling near one side of the fan can realize better cooling effect, and the air flow contacted with the cooling liquid far away from the fan in the falling process is heated, so that the cooling effect is poor, and the cooling requirement cannot be met. In addition, the fan of the patent only utilizes air in natural environment to form air flow, but the environment temperature of equipment is generally higher, and the temperature of the air flow led out by the fan can not meet the requirement of cooling drilling fluid. Finally, the sieve bucket provided by the patent is not provided with a cleaning mechanism, and the chamber is filled with debris such as rock debris carried by the drilling fluid, so that the drilling fluid cannot be continuously filtered. In addition, the existing coiled drilling fluid cooling system has uneven cooling effect, especially the drilling fluid in the central area of the cooling cavity cannot be contacted with the cooling coiled tube, and heat carried by the drilling fluid cannot be effectively transferred.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, as the inventors studied numerous documents and patents while the present utility model was made, the text is not limited to details and contents of all that are listed, but it is by no means the present utility model does not have these prior art features, the present utility model has all the prior art features, and the applicant remains in the background art to which the rights of the related prior art are added.

Disclosure of Invention

The utility model aims to provide a cooling treatment device for a drilling fluid, which can cool the drilling fluid in a split-flow and multi-cooling mode, and can finish dredging of a screen mesh through directional flowing air flow and continuously transfer impurities by an output assembly in a secondary cooling process so as to improve the continuous working efficiency of a screening mechanism for purifying the drilling fluid.

The technical scheme adopted by the utility model is as follows: the utility model provides a purifier of coolable drilling fluid, includes the overflow output pipeline that is linked together with the overflow mouth of well drilling, the output of overflow output pipeline is connected with first cooling module, the output of first cooling module is provided with screening subassembly, screening cavity and the exhaust piping of second cooling module of screening subassembly are connected, and the exhaust piping sets up the below of the screen cloth of screening subassembly, so that the cooling air current of the directional output of second cooling module can cool off the drilling fluid that is in the screening cavity when carrying out the reverse blow to the screen cloth of screening subassembly and leading; the first cooling component is characterized in that a plurality of parallel branch pipes and first cooling branch pipes wrapping the branch pipes are defined by the first cooling component and are distributed in an annular array arrangement mode, and second cooling branch pipes are further arranged in middle holes of a ring body formed by the branch pipes and the first cooling branch pipes.

According to a preferred embodiment, the first cooling assembly further comprises a conical input pipe and a conical output pipe, which are respectively in communication with the input ends and the output ends of a plurality of branch pipes distributed in an annular array, so that the branch pipes, the conical input pipe and the conical output pipe form a conveying pipe capable of splitting and converging drilling fluid; the axial lower end of the first cooling branch pipe is communicated with the output end of the refrigerating unit through an outer ring pipe, the axial upper end of the first cooling branch pipe is communicated with the axial upper end of the second cooling branch pipe through a U-shaped return pipe, and the outlet of the axial lower end of the second cooling branch pipe is communicated with the input end of the refrigerating unit, so that a cooling loop is constructed.

According to a preferred embodiment, the inlet end of the conical inlet pipe communicates with the outlet end of the overflow outlet pipe and the outlet end of the conical outlet pipe communicates with the inlet opening of the axial upper section of the screening chamber of the screening assembly; the side wall of the screening cavity is obliquely provided with the screen capable of filtering impurities in drilling fluid, an output assembly capable of discharging filtered impurities is arranged below the lower end of the screen in an inclined mode, part of the pipe body is inserted into the screening cavity, the exhaust pipeline array of the screening cavity is arranged in the screening cavity, and the jet opening of the exhaust pipeline is arranged in a mode of facing the mesh of the screen.

According to a preferred embodiment, the output assembly comprises a conveyor belt, a supporting wheel, a collecting trough and a scraper blade, wherein the lower end of the conveyor belt, which is defined by the supporting wheel in an inclined state, is located below the end of the screen, the collecting trough is provided at the upper end edge of the conveyor belt 331 outside the screening chamber, and the scraper blade mounted at the notch edge of the collecting trough is arranged against the surface of the conveyor belt in such a way that impurities present at the surface of the conveyor belt can be scraped off.

According to a preferred embodiment, the upper surface of the screen is further provided with a scraper mechanism, the scraper mechanism comprises a scraper, an end connection block, a rotating shaft rod, a positioning block and a rotating motor, wherein the two ends of the scraper are connected with the end connection block, the end connection block is arranged on the rotating shaft rod parallel to the screen in a penetrating mode, one end of the rotating shaft rod is inserted into the positioning block arranged on the inner cavity wall of the screening cavity in a positioning mode, and one end, far away from the positioning block, of the rotating shaft rod penetrates through the side wall of the screening cavity and is in transmission connection with the rotating motor arranged on the outer side of the screening cavity.

According to a preferred embodiment, the two rotating shafts respectively connected to the end connection blocks to which the two ends of the scraper are attached are arranged in parallel with each other, and the plane defined by the two shafts is parallel with the plane defined by the screen.

According to a preferred embodiment, both the support wheel and the collection trough are suspended by a support frame.

According to a preferred embodiment, the side wall of the screening chamber is provided with an opening for the conveyor belt to pass through, and the opening is provided with an extension cavity plate along the extension direction of the conveyor belt, and the cavity space defined by the extension cavity plate is communicated with the screening chamber.

According to a preferred embodiment, the second cooling assembly comprises the exhaust pipeline, an airflow conveying pipe, a gas storage unit and a pressurizing unit, wherein a plurality of exhaust pipelines which are arranged in an array are communicated with the gas storage unit through the airflow conveying pipe, and a valve is arranged on the pipeline of the airflow conveying pipe; the input end of the gas storage unit is provided with the pressurizing unit.

According to a preferred embodiment, a plurality of cooling cannulas are arranged in the gas storage unit, and the cooling cannulas form a closed loop with the refrigeration unit through a communication pipeline.

The beneficial effects of the utility model are as follows:

the circulating diversion branch pipes designed by the utility model can effectively and uniformly realize diversion of drilling fluid, and the first cooling branch pipes which are configured one to one with the diversion branch pipes can finish cooling of the drilling fluid in the diversion branch pipes with approximately equal heat absorption capacity, so that the drilling fluid output by each diversion branch pipe is effectively cooled, the cooling effect is approximately equal, and further, the drilling fluid is effectively and uniformly cooled. In addition, the second cooling branch pipe provided by the utility model can be mutually matched with the first cooling branch pipe to wrap the branch pipe, so that the branch liquid flow in the branch pipe can be effectively subjected to heat exchange. The structure setting of reposition of redundant personnel has avoided the center liquid stream of cooling cylinder can't contact with the cooling coil on the section of thick bamboo wall and can't effectively dispel the heat the defect. According to the utility model, the cooling unit is arranged to directly cool the cooling liquid, so that the cooling liquid can be cooled to a low enough temperature, and the cooling unit can effectively cool the drilling liquid in the branch pipe.

The output assembly provided by the utility model can continuously transfer impurities filtered out by the screen to the outside of the screening cavity, so that the defect that the impurities fill the screening cavity and block the screen and need to be cleaned regularly is avoided, and the problem that the conventional screening purification device cannot continuously work for a long time is effectively solved, so that the cleanliness in the screening cavity can be improved by the arrangement of the output assembly, and the screening efficiency of the screening assembly is improved to a certain extent.

The scraper mechanism provided by the utility model can effectively remove impurities accumulated on the screen, and can effectively complete impurity transfer by matching with the output assembly, so that the screen is prevented from being blocked by the accumulated impurities, and the screening efficiency is ensured. The cooperation of the cooling air flow that scraper mechanism and exhaust pipe export can be further dredged the mesh that the screen cloth was plugged up by impurity under the circumstances that the impurity that the screen cloth was piled up was cleared up to make the screen cloth can keep a high-efficient screening efficiency for a long time.

According to the utility model, the actually flowing-out cooling air flow of the second cooling assembly from bottom to top can be used for intermittently backflushing and dredging the screen according to the requirements, so that sundries are prevented from blocking meshes of the screen, the screen can continuously filter drilling fluid, the process steps of periodically shutting down and cleaning the screen to ensure the filtering efficiency are reduced, and the device can continuously perform drilling fluid screening and purifying treatment, so that the efficiency and the treatable capacity of the device are improved, and the time cost and the labor cost required by maintenance are reduced.

Drawings

FIG. 1 is a schematic view of a preferred coolable drilling fluid cleaning device embodying the present utility model;

FIG. 2 is a schematic view of the structure of part A of a preferred coolable drilling fluid cleaning device in accordance with the present utility model;

FIG. 3 is a schematic plan view of a preferred screed mechanism for cooling drilling fluid in accordance with the present utility model;

fig. 4 is a schematic cross-sectional view of a first cooling manifold area of a preferred coolable drilling fluid purification device embodying the present utility model.

List of reference numerals

1: an overflow output line; 2: a first cooling assembly; 3: a screen assembly; 4: a second cooling assembly; 21: a branch pipe; 22: a first cooling branch pipe; 23: a second cooling branch pipe; 24: a conical input tube; 25: a conical output tube; 26: an outer collar; 27: a refrigerating unit; 28: a U-shaped return pipe; 31: a sieving chamber; 32: a screen; 33: an output assembly; 34: a scraper mechanism; 41: an exhaust line; 42: an air flow conveying pipe; 43: a gas storage unit; 44: a pressurizing unit; 45: a valve; 46: cooling the cannula; 311: an opening; 312: an extension cavity plate; 331: a conveyor belt; 332: a support wheel; 333: a collection tank; 334: a wiper blade; 335: a support frame; 341: a scraper; 342: an end connection block; 343: a rotating shaft; 344: a positioning block; 345: a rotating electric machine.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

The technical solution provided by the present utility model will be described in detail by way of examples with reference to the accompanying drawings. It should be noted that the description of these examples is for aiding in understanding the present utility model, but is not intended to limit the present utility model. In some instances, some embodiments are not described or described in detail as such, as may be known or conventional in the art.

Furthermore, features described herein, or steps in all methods or processes disclosed, may be combined in any suitable manner in one or more embodiments in addition to mutually exclusive features and/or steps. It will be readily understood by those skilled in the art that the steps or order of operation of the methods associated with the embodiments provided herein may also be varied. Any order in the figures and examples is for illustrative purposes only and does not imply that a certain order is required unless explicitly stated that a certain order is required.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein, where appropriate (without making up a paradox), include both direct and indirect connections (couplings).

The following detailed description refers to the accompanying drawings.

Example 1

The utility model provides a purifying device capable of cooling drilling fluid, which comprises an overflow output pipeline 1, a first cooling assembly 2, a screening assembly 3 and a second cooling assembly 4.

According to a specific embodiment shown in fig. 1, the overflow outlet line 1 communicates with the overflow of the well. The output end of the overflow output pipeline 1 is connected with a first cooling component 2. The first cold zone component 2 promotes the contact area between the drilling fluid and the pipe wall by constructing a plurality of branched branch pipes, so that the heat carried by the drilling fluid can be transferred as far as possible, and the temperature of the drilling fluid is effectively reduced. The output of the first cooling module 2 is provided with a screen module 3. The screening assembly 3 can perform impurity separation on the drilling fluid subjected to preliminary cooling, so that the drilling fluid with improved purity is screened out. The chamber of the screen assembly 3 is combined with the relevant output end of the second cooling assembly 4, so that the cooling air flow output by the second cooling assembly 4 can dredge the impurity screening structure in the screen assembly 3 and simultaneously can perform secondary cooling treatment on the drilling fluid subjected to screening treatment in the screen assembly 3 by utilizing the low-temperature air flow which is directionally poured in, thereby further reducing the temperature of the drilling fluid, and returning the upward high-temperature drilling fluid to a room temperature state or even a lower temperature state after being subjected to multiple cooling.

Preferably, the first cooling assembly 2 comprises a branch pipe 21, a first cooling branch pipe 22, a second cooling branch pipe 23, a conical input pipe 24, a conical output pipe 25, an outer ring pipe 26 and a refrigerating unit 27. As shown in fig. 4, the plurality of parallel branch pipes 21 defined by the first cooling module 2 and the first cooling branch pipes 22 surrounding the branch pipes 21 are arranged in a circular array arrangement, and the second cooling branch pipes 23 are further provided in the middle holes of the ring body formed by the branch pipes 21 and the first cooling branch pipes 22. Specifically, the single first cooling branch pipe 22 forms a single combined branch pipe structure in such a manner as to wrap part of the side face of the branch pipe 21, and annular splicing of a plurality of such combined branch pipe structures forms a ring body structure. Preferably, the second cooling branch pipes 23 are inserted directly inside the ring structure, so that the second cooling branch pipes 23 and the first cooling branch pipes 22 are mutually matched to perform side wall wrapping on the branch pipes 21. Preferably, a turbulent flow propeller is provided in the second cooling branch pipe 23, so that the cooling liquid flowing through the second cooling branch pipe 23 can be disturbed by the turbulent flow propeller driven to rotate by the directional flowing liquid flow, thereby accelerating heat transfer between the cooling liquid and the branch pipe 21. The diversion branch pipes 21 designed in the utility model can effectively and uniformly realize diversion of drilling fluid, and the first cooling branch pipes 22 which are arranged one to one with the diversion branch pipes 21 can finish cooling of the drilling fluid in the diversion branch pipes 21 with approximately equal heat absorption capacity, so that the drilling fluid output by each diversion branch pipe 21 is effectively cooled, the cooling effect is approximately equal, and further, the drilling fluid is effectively and uniformly cooled. In addition, the second cooling branch pipe 23 provided by the utility model can wrap the branch pipe 21 in a manner of being matched with the first cooling branch pipe 22, so that the branch liquid flow in the branch pipe 21 can be effectively exchanged. The structure setting of reposition of redundant personnel has avoided the center liquid stream of cooling cylinder can't contact with the cooling coil on the section of thick bamboo wall and can't effectively dispel the heat the defect.

Preferably, the conical input pipe 24 and the conical output pipe 25 are respectively communicated with the input ends and the output ends of a plurality of diversion branch pipes 21 distributed in an annular array, so that the diversion branch pipes 21, the conical input pipe 24 and the conical output pipe 25 form a conveying pipeline capable of diverting and converging drilling fluid. It is further preferred that the axially lower end of the first cooling branch 22 communicates with the output end of the refrigeration unit 27 through an outer collar 26. Specifically, the communication port size between the outer ring pipe 26 and the first cooling branch pipe 22 is gradually increased in accordance with the increase in length along the line from the input port of the outer ring pipe 26 to the first cooling branch pipe 22, so that the first cooling branch pipe 22 distant from the outer ring pipe 26 has a larger conductance, thereby enabling the plurality of first cooling branch pipes 22 arranged in parallel to branch the flow of the coolant inputted to the outer ring pipe 26 in a substantially uniform manner. By providing the communication ports with gradient changes, the flow of the first cooling branch pipe 22 near the input end of the outer ring pipe 26 can be limited, so that more flow can be forced to flow along the outer ring pipe 26, and a plurality of parallel first cooling branch pipes 22 can be branched into the cooling liquid flow with approximately equal flow from the outer ring pipe 26, so that the heat transferred by each branching pipe 21 by the first cooling branch pipe 22 is ensured to be approximately equal, and the drilling liquid is subjected to approximately equal temperature drop in different branching pipes 21. Preferably, the axial upper end of the first cooling branch pipe 22 communicates with the axial upper end of the second cooling branch pipe 23 through a U-shaped return pipe 28, so that the surface of the branch pipe 21 facing the second cooling branch pipe 23 is heated by the return cooling liquid, and the axial lower end outlet of the second cooling branch pipe 23 communicates with the input end of the refrigerating unit 27, thereby constructing a cooling circuit. Preferably, the refrigeration unit 27 is a chiller in a circulating refrigeration system. The cooling unit 27 capable of directly cooling the cooling liquid is arranged, so that the cooling liquid can be cooled to a low enough temperature, and the cooling unit can effectively cool the drilling liquid in the branch pipe 21.

Preferably, the inlet end of the conical inlet pipe 24 communicates with the outlet end of the overflow outlet pipe 1 and the outlet end of the conical outlet pipe 25 communicates with the inlet opening of the axial upper section of the screening chamber 31 of the screen assembly 3, so that the initially cooled drilling fluid can be filtered in the screening chamber 31. Preferably, a screen 32 capable of filtering impurities in the drilling fluid is obliquely installed on a sidewall of the screening chamber 31. It is further preferred that an output assembly 33 capable of discharging filtered impurities is provided in a space below a lower end of the obliquely disposed screen 32. Preferably, an array of exhaust pipes 41, part of which is inserted into the screening chamber 31, is arranged in the screening chamber 31, and the injection ports of the exhaust pipes 41 are arranged in such a manner as to face the mesh openings of the screen 32. Preferably, the screening chamber 31 of the screening assembly 3 is connected to the exhaust line 41 of the second cooling assembly 4 and the exhaust line 41 is arranged below the screen 32 of the screening assembly 3 so that the cooling air flow directed out of the second cooling assembly 4 can cool the drilling fluid in the screening chamber 31 while the screen 32 of the screening assembly 3 is being back-blow-led.

Preferably, an opening 311 for the conveyor 331 to pass through is formed on the sidewall of the sieving chamber 31, and an extension cavity plate 312 is disposed on the opening 311 along the extending direction of the conveyor 331, and the cavity space defined by the extension cavity plate 312 is communicated with the sieving chamber 31, so that when the conveyor 331 transports impurities, drilling fluid precipitated from the impurities can flow back into the sieving chamber 31 along the extension cavity plate 332. The extending cavity plate 312 can effectively avoid the drilling fluid from overflowing from the opening 311 when the liquid level in the sieving chamber 31 is not passing through the sieving net 32.

As shown in fig. 2, the output assembly 33 includes a conveyor belt 331, a support runner 332, a collection trough 333, and a wiper 334. Preferably, the lower end of the conveyor belt 331, which is supported by the wheel 332 defining an inclined condition, is below the end of the screen 32, so that the conveyor belt 331 is able to transfer the impurities filtered out by the screen 32 to the outside of the screening chamber 31. Preferably, the support wheel 332 and the collection trough 333 are suspended by a support frame 335. It is further preferred that the high end edge of the conveyor belt 331 outside the screening chamber 31 is provided with a collecting trough 333, and that a doctor blade 334 mounted at the notch edge of the collecting trough 333 is arranged against the surface of the conveyor belt 331 in such a way that it is possible to scrape off impurities present at the surface of the conveyor belt 331. A squeegee mechanism 34 is also preferably provided on the upper surface of the screen 32. Specifically, the squeegee mechanism 34 is capable of directional movement along the plane defined by the screen 32 to scrape and transfer the foreign objects intercepted by the screen 32 onto the conveyor belt 331 of the output assembly 33. The output assembly 33 provided by the utility model can continuously transfer impurities filtered by the screen mesh 32 to the outside of the screening cavity 31, so that the defect that the impurities need to be cleaned regularly because the screening cavity 31 is filled with the impurities and the screen mesh 32 is blocked is avoided, and the problem that the conventional screening and purifying device cannot continuously work for a long time is effectively solved, therefore, the cleanliness in the screening cavity 31 can be improved by the arrangement of the output assembly 33, and the screening efficiency of the screening assembly 3 is improved to a certain extent.

As shown in fig. 2 and 3, the squeegee mechanism 34 includes a squeegee 341, an end connection block 342, a rotation shaft 343, a positioning block 344, and a rotation motor 345. Preferably, both ends of the scraping plate 341 are connected with end connection blocks 342, and the end connection blocks 342 are penetrated on a rotation shaft 343 parallel to the screen 32. Further preferably, one end of the rotating shaft 343 is inserted into a positioning block 344 fixed to the inner cavity wall of the sieving chamber 31, and the rotating shaft 343 is rotatable about its own axis relative to the positioning block 344. Specifically, the positioning block 344 is provided with a hole for accommodating a part of the shaft of the rotating shaft 343. It is further preferred that the end of the rotating shaft 343 remote from the positioning block 344 extends through the side wall of the sieving chamber 31 in driving connection with a rotating motor 345 mounted outside the sieving chamber 31. The rotating motor is a double-head driving motor, so that the double-head driving motor can synchronously drive the two parallel rotating shaft rods 343, and the rotation of the rotating shaft rods 343 drives the end connecting blocks 342 to reciprocate and translate along the axial direction of the rotating shaft rods 343, so that the scraping plates 341 are driven to scrape sundries accumulated on the screen 32. Preferably, two rotating shafts 343 connected to end connection blocks 342 mounted to both ends of the blade 341, respectively, are disposed in parallel with each other, and a plane defined by the two is parallel with a plane defined by the screen 32. The scraper mechanism 34 provided by the utility model can effectively remove impurities accumulated on the screen 32, and can effectively complete impurity transfer by matching with the output assembly 33, so that the screen 23 is prevented from being blocked by the accumulated impurities, and the screening efficiency is ensured. The cooperation of the scraper mechanism 34 and the cooling air flow output by the exhaust pipeline 41 can further dredge the mesh of the screen 23 blocked by the impurities under the condition that the impurities accumulated by the screen 23 are cleaned, so that the screen 23 can maintain high screening efficiency for a long time.

Preferably, the second cooling assembly 4 includes an exhaust duct 41, an air flow delivery pipe 42, an air storage unit 43, and a pressurizing unit 44. Specifically, a plurality of exhaust pipelines 41 arranged in an array are communicated with a gas storage unit 43 through an air flow conveying pipe 42, and a valve 45 is arranged on the pipeline of the air flow conveying pipe 42. It is further preferred that the input end of the gas storage unit 43 is provided with a pressurizing unit 44 so that the gas in the gas storage unit 43 can be pressurized to a set pressure so that the gas flow delivered through the gas flow delivery pipe 42 has a specific flow rate. Preferably, the valve 45 can control the flow rate and flow rate of the cooling air flow actually flowing out through the exhaust pipeline 41, so that the cooling air flow actually flowing out of the exhaust pipeline 41 can periodically perform parameter adjustment, the cooling air flow can intermittently recoil and dredge the screen 32 according to requirements, so as to prevent sundries from blocking meshes of the screen 32, the screen 32 can continuously perform filtering of drilling fluid, process steps for periodically shutting down and cleaning the screen 32 to ensure filtering efficiency are reduced, the device can continuously perform drilling fluid screening and purifying treatment, the efficiency and the treatable capacity of the device are improved, and the time cost and the labor cost required by maintenance are reduced. Preferably, a plurality of cooling inserts 46 are disposed within the air storage unit 43. Specifically, the cooling insert 46 forms a closed circuit with the refrigeration unit 27 through a communication line. Preferably, the cooling insert 46 has a U-shaped tube body so that the U-shaped tube body placed in the chamber of the gas storage unit 43 can be heat-replaced with the gas in the chamber. The cooling insert 46 of the U-shaped pipe body can effectively cool the gas in the gas storage unit 43, so that the cooling gas which is outputted in a directional manner has a lower free temperature, and secondary cooling of the related drilling fluid can be completed efficiently.

The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the utility model is defined by the claims and their equivalents. Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.

Claims (10)

1. The utility model provides a purifier of coolable drilling fluid, includes overflow output pipeline (1) that is linked together with the overflow mouth of well drilling, characterized in that, the output of overflow output pipeline (1) is connected with first cooling module (2), the output of first cooling module (2) is provided with screening subassembly (3), screening cavity (31) and the exhaust pipeline (41) of second cooling module (4) of screening subassembly (3) are connected, and exhaust pipeline (41) set up in screening subassembly (3) below screen cloth (32), so that the cooling air current of the directional output of second cooling module (4) can be through carrying out reverse blow dredging screen cloth (32) of screening subassembly (3) the drilling fluid that is in screening cavity (31);

the plurality of parallel branch pipes (21) defined by the first cooling component (2) and the first cooling branch pipes (22) wrapping the branch pipes (21) are distributed in a ring-shaped array arrangement mode, and second cooling branch pipes (23) are further arranged in middle holes of a ring body formed by the branch pipes (21) and the first cooling branch pipes (22).

2. The device for purifying coolable drilling fluid according to claim 1, wherein the first cooling module (2) further comprises a conical inlet pipe (24) and a conical outlet pipe (25), the conical inlet pipe (24) and the conical outlet pipe (25) being in communication with the inlet and outlet ends of a plurality of branch pipes (21) arranged in an annular array, respectively, whereby the branch pipes (21), the conical inlet pipe (24) and the conical outlet pipe (25) form a conveying line capable of branching and converging drilling fluid;

the axial lower end of the first cooling branch pipe (22) is communicated with the output end of the refrigerating unit (27) through an outer ring pipe (26), the axial upper end of the first cooling branch pipe (22) is communicated with the axial upper end of the second cooling branch pipe (23) through a U-shaped return pipe (28), and the axial lower end outlet of the second cooling branch pipe (23) is communicated with the input end of the refrigerating unit (27), so that a cooling loop is constructed.

3. A coolable drilling fluid cleaning device as defined in claim 2, wherein the inlet end of said conical inlet pipe (24) communicates with the outlet end of said overflow outlet pipe (1) and the outlet end of said conical outlet pipe (25) communicates with the inlet opening of the axially upper section of the screening chamber (31) of said screen assembly (3);

the side wall of the sieving chamber (31) is obliquely provided with the screen (32) which can filter impurities in drilling fluid, an output assembly (33) which can discharge the filtered impurities is arranged below the lower end of the obliquely arranged screen (32),

the array of exhaust pipes (41) with parts of the pipes inserted into the screening chamber (31) is arranged inside the screening chamber (31), and the injection openings of the exhaust pipes (41) are arranged so as to face the mesh openings of the screen (32).

4. The coolable drilling fluid cleaning device as set forth in claim 3, wherein said output assembly (33) includes a conveyor belt (331), a support wheel (332), a collection trough (333), and a wiper blade (334), wherein,

the lower end of the conveyor belt (331) in an inclined state defined by the support wheel (332) is located below the end of the screen (32),

the high end edge of the conveyor belt (331) outside the sieving chamber (31) is provided with the collecting groove (333), and the scraping blade (334) mounted at the notch edge of the collecting groove (333) is arranged against the surface of the conveyor belt (331) in such a manner that impurities existing on the surface of the conveyor belt (331) can be scraped off.

5. The coolable drilling fluid cleaning device as set forth in claim 4, wherein a scraper mechanism (34) is further provided on the upper surface of said screen (32),

the scraper mechanism (34) comprises a scraper (341), an end connecting block (342), a rotating shaft lever (343), a positioning block (344) and a rotating motor (345), wherein,

the two ends of the scraping plate (341) are connected with the end connecting blocks (342), the end connecting blocks (342) are arranged on the rotating shaft rod (343) in a penetrating way, which is parallel to the screen (32),

one end of the rotating shaft lever (343) is inserted into the positioning block (344) positioned and installed on the inner cavity wall of the sieving chamber (31), and one end of the rotating shaft lever (343) far away from the positioning block (344) penetrates through the side wall of the sieving chamber (31) and is in transmission connection with the rotating motor (345) installed on the outer side of the sieving chamber (31).

6. A device for purifying coolable drilling fluid as in claim 5, wherein two of said rotating shafts (343) respectively connected to said end connection blocks (342) to which both ends of said blades (341) are attached are disposed in parallel with each other and the plane defined by both of them is parallel with the plane defined by said screen (32).

7. The coolable drilling fluid cleaning device of claim 6 wherein said support wheel (332) and said collection trough (333) are suspended by a support frame (335).

8. A coolable drilling fluid cleaning device as defined in claim 7, characterized in that an opening (311) is provided in a side wall of said screening chamber (31) for said conveyor belt (331) to pass through, and that said opening (311) is provided with an extension chamber plate (312) along the extension direction of said conveyor belt (331), the lumen space defined by said extension chamber plate (312) being in communication with said screening chamber (31).

9. The coolable drilling fluid cleaning device of claim 8, wherein said second cooling module (4) includes said exhaust conduit (41), an air flow duct (42), an air storage unit (43) and a pressurizing unit (44), wherein,

the exhaust pipelines (41) arranged in an array are communicated with the gas storage unit (43) through the gas flow conveying pipes (42), and valves (45) are arranged on the pipelines of the gas flow conveying pipes (42);

the input end of the gas storage unit (43) is provided with the pressurizing unit (44).

10. The device for purifying coolable drilling fluid as claimed in claim 9, characterized in that a plurality of cooling inserts (46) are arranged in the gas storage unit (43), the cooling inserts (46) forming a closed circuit with the refrigeration unit (27) via a communication line.