CN210530775U - Purifier and system for recovering drilling fluid - Google Patents

Abstract

The utility model discloses a clarifier is used in drilling fluid recovery, including actuating mechanism, shell body, centrifugal body and enclosing cover, its characterized in that: the centrifugal part of the centrifugal body is externally provided with a matched backwashing body, the inner wall of the backwashing body is randomly distributed and provided with a plurality of flow deflectors, an isolating ring is arranged between the centrifugal body and the backwashing body, the isolating ring, the centrifugal body and the filter screen are sequentially sleeved on one side part of an annular step at the free end of the rotating shaft and are tightly pressed and connected by a fixing head. The purification system for recovering the drilling fluid is provided with one or more purifiers which are used independently, in parallel or in series. The utility model provides a drilling fluid is clarifier and system for recovery, on the one hand through the function combination, simplify equipment structure, reduced equipment manufacturing cost, on the other hand through the backwash structure that self has, the jam that can significantly reduce has reduced the plant maintenance cost.

Description

Purifier and system for recovering drilling fluid

Technical Field

The utility model relates to a drilling tool technical field especially relates to drilling fluid is clarifier and system for recovery.

Background

In the oil drilling process, drilling fluid is generally used to cool the drill bit and clean the bottom of the well. The drilling fluid returned from the well bottom contains a plurality of rock debris and sand mud which must be subjected to solid-liquid separation by a purification system and further purified for recycling. The drilling fluid purification system comprises a vibrating screen, a sand remover, a centrifugal machine and other equipment. Along with the continuous improvement of the requirements on the drilling process, the purification system of the drilling fluid is larger and more complex, and because the purification system is provided with a plurality of purification systems, the blocking phenomenon happens occasionally, the equipment is overhauled and maintained for a plurality of times, and therefore the drilling cost is also improved. Therefore, simplifying the drilling fluid purification system and reducing the drilling cost are urgent problems to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the problem that prior art exists, provide a drilling fluid is clarifier and system for recovery, pass through the function combination on the one hand, simplify equipment structure, reduced equipment manufacturing cost, on the other hand is through the backwash structure that self has, and the jam that can significantly reduce has reduced the equipment maintenance cost.

The utility model adopts the technical proposal that:

drilling fluid is clarifier for recovery, including actuating mechanism, shell body, centrifuge and enclosing cover, the drive structure includes driving motor and has the pivot of annular step, driving motor fixes outside the shell body bottom, inside the shell body was stretched into to the pivot along shell body axial direction, the shell body comprises inner tube and the urceolus that is concentric structure and inner tube bottom is outstanding outside the urceolus bottom and is equipped with the fluid-discharge tube, and the top is less than the urceolus top, the centrifuge is the cap form, and surface attachment installs the filter screen, including centrifuge portion and ring lid portion, a plurality of through-holes have been seted up on the centrifuge portion, the ring lid edge is located inner tube top outside below, the enclosing cover lid closes at the outer casing top, middle part opening, its characterized in that: the centrifugal part of the centrifugal body is externally provided with a matched backwashing body, the inner wall of the backwashing body is randomly distributed and provided with a plurality of flow deflectors, an isolating ring is arranged between the centrifugal body and the backwashing body, the isolating ring, the centrifugal body and a filter screen are sequentially sleeved on one side part of an annular step at the free end of a rotating shaft and are tightly pressed and connected by a fixed head, and the axial centers of the backwashing body, the isolating ring and the centrifugal body coincide with the axial center of the outer shell and the rotation center of the driving motor.

Furthermore, the central position of the bottom of the inner cylinder is sunken to the inner side of the inner cylinder in a circular truncated cone shape to form a sunken area, and the liquid discharge pipe is positioned on the outer side of the sunken area, so that separated liquid parts can be collected conveniently.

Furthermore, the free end of the flow deflector on the inner wall of the backwashing body faces the axial center direction of the backwashing body, part of liquid is guided to the centrifugal body under the action of the flow deflector, backwashing in the filtering process is carried out, and the blocking risk is reduced.

Furthermore, a circle of circumferential wall is integrally formed on the lower surface of the cover changing part, the axial center of the circumferential wall is superposed with the center of the centrifugal body, and the lower end of the circumferential wall extends to the lower position of the inner side of the top of the inner cylinder body, so that liquid centrifugally discharged from the backwashing body can completely enter the inner cylinder.

Furthermore, the fixed head comprises a fixed part in threaded connection with the rotating shaft and a conical part which is integrally formed, the conical part is matched with the annular step to compress and fix the backwashing body, the isolating ring, the centrifugal body and the filter screen, and the conical part can also play a role in guiding flow.

And a discharge hole and a matched discharge door are arranged on the circumferential side wall of the outer barrel, and three support legs are uniformly arranged at the edge of the bottom surface.

Furthermore, the purifier also comprises a cleaning pipe, one end of the cleaning pipe is positioned outside the inner cylinder, the other end of the cleaning pipe is positioned in the area between the bottom of the backwashing body and the bottom of the centrifugal body, the surface of the cleaning pipe is not contacted with the backwashing body and the centrifugal body, and the cleaning pipe can be used for washing the backwashing body.

Furthermore, on the cleaning pipe part between the backwashing body and the centrifugal body, a plurality of flushing holes are respectively arranged on two sides facing the backwashing body and the centrifugal body, and the backwashing body and the centrifugal body can be flushed by utilizing the cleaning pipe to remove attached crops and blockage.

Drilling fluid recovery clean system, including advancing the thick liquid pipe, its characterized in that: the system also comprises at least one purifier for recovering the drilling fluid, wherein each purifier is mutually independent, and the slurry inlet pipes correspond to the purifiers one by one and extend into the purifiers.

Drilling fluid recovery clean system, including advancing the thick liquid pipe, it is also lieing in: the system also comprises at least two purifiers for recovering the drilling fluid, wherein each purifier is sequentially connected in series, a slurry pump is arranged on a connected pipeline, and the slurry inlet pipe extends into the first purifier.

The utility model has the advantages that:

the utility model discloses a solve the clean system of drilling fluid among the prior art also more and more huge, complicated, and because be equipped with many, the blocking phenomenon takes place occasionally, and the number of times of overhaul of the equipments maintenance is also more, therefore the problem that the drilling cost also improved thereupon, the utility model discloses having carried out the function combination, simplifying equipment structure, designed the clarifier, the clarifier makes up according to actual conditions, can one or more, the exclusive use, parallelly connected use or series connection use constitution clean system, reduced equipment manufacturing cost on the whole. Meanwhile, due to the backwashing structure, the blocking phenomenon can be greatly reduced, and the equipment maintenance cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a drilling fluid recovery purifier according to the first embodiment.

Fig. 2 is an exploded schematic view of a drilling fluid recovery purifier according to the first embodiment.

Fig. 3 is a schematic structural diagram of a drilling fluid recovery and purification system in the first embodiment.

Fig. 4 is a schematic sectional view along the direction of a-a in fig. 3.

Fig. 5 is a schematic structural diagram of a drilling fluid recovery and purification system in the second embodiment.

Fig. 6 is a schematic structural diagram of a drilling fluid recovery and purification system in the third embodiment.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention.

Embodiments of the present invention/utility model will be described in detail below with reference to the drawings.

Example one

As shown in fig. 1-4, the drilling fluid recovery and purification system comprises a purifier 100 and a slurry inlet pipe 200, wherein the drilling fluid to be recovered and purified is introduced into the purifier 100 from the slurry inlet pipe 200 which is installed outside the top of the purifier 100 in a hanging manner, under the action of rotary centrifugation, the separation of liquid from solids such as drill cuttings, silt and the like is realized, the separated solid part can be buried after being treated, and the separated liquid part is regulated and then reused for drilling operation, so that the risk of environmental pollution is greatly reduced.

Specifically, the purifier 100 includes a driving mechanism 110, an outer casing 120, a backwashing body 130, a centrifugal body 140, and an outer cover 150.

The driving mechanism 110 includes a driving motor 111 and a rotating shaft 112 connected to the driving motor 111. The diameter of the free end of the rotating shaft 112 is smaller than that of the end connected with the driving motor 111 to form an annular step 113, and the end of the free end of the rotating shaft 112 is provided with a threaded assembling hole 114. The rotation speed of the driving motor 111 is adjusted according to the content and particle size of the solid such as drill cuttings and silt.

The outer shell 120 is composed of an inner cylinder 121 and an outer cylinder 122 which are concentric, the inner cylinder 121 is located inside the outer cylinder 122, and the top of the outer cylinder 122 is higher than the top of the inner cylinder. The bottom of the inner cylinder 121 protrudes out of the bottom of the outer cylinder 122, the center of the bottom of the inner cylinder 121 is recessed toward the inner side of the inner cylinder 121 in a truncated cone shape to form a recessed area 1211, and a first mounting hole 1212 is formed at the center of the top of the recessed area 1211. When the inner cylinder 121 is installed, the driving motor 111 is fixed outside the bottom of the inner cylinder 121, the rotating shaft 112 passes through the first installation hole 1212 and extends into the inner cylinder 121, the annular step 113 is located inside the inner cylinder 121, and a sliding contact seal is formed between the rotating shaft 112 and the first installation hole 1212. Outside the recessed area 1211, a drain pipe 1213 is disposed near the bottom edge of the inner cylinder 121, and the drain pipe 1213 is in communication with the inside of the inner cylinder 121. A discharge port 1221 and a matched discharge door are arranged on the circumferential side wall of the outer cylinder 122, and three support legs 1222 are arranged at the edge of the bottom surface. The lower edge of the outlet 1221 is flush with the bottom surface of the outer cylinder 122, so that the substance between the inner cylinder 121 and the outer cylinder 122 can be conveniently taken out. The three legs 1222 are uniformly arranged in a circumferential manner, are perpendicular to the bottom surface of the outer cylinder 122, and have upper ends welded to the bottom surface of the outer cylinder 122, so as to increase the height of the purifier 100 and provide stable support.

The backwash body 130 is in the shape of an inverted truncated cone, has a hollow interior, a large top and a small bottom, an open top, and a closed bottom. A plurality of flow deflectors 131 are randomly installed on the inner wall of the backwashing body 130, and the flow guide directions of the flow deflectors 131 are randomly set and preferentially set to face the central axis direction in the backwashing body 130. The bottom surface of the backwashing body 130 is provided with a second mounting hole, when the backwashing body 130 is assembled, the bottom of the backwashing body 130 is fixed on the annular step 113, and the free end of the rotating shaft 112 passes through the second mounting hole.

The centrifuge 140 is in the form of a cap, and includes a centrifuge 141 and a ring cover 142 having a shape similar to that of the backwash body 130, and both are integrally molded. A layer of side screen (not shown) is attached to the entire upper surface of the centrifuge body 140. The bottom and the side wall of the centrifugal part 141 are provided with circular or strip-shaped through holes, and the center of the bottom is provided with a third mounting hole. A circle of circumferential wall 144 is integrally formed on the lower surface of the annular cover part 142, the circumferential wall 144 is perpendicular to the lower surface of the annular cover part 142, the axial center of the circumferential wall is overlapped with the center of the centrifugal body 140, and the lower end position of the circumferential wall is lower than the edge extending downwards outside the annular cover part. When the centrifugal backwashing device is assembled, the free end of the rotating shaft 112 provided with the backwashing body 130 is provided with the matched isolating ring 160, then the free end passes through the third mounting hole and is fixed by the fixing head 170, namely the centrifugal body 140 and the backwashing body 130 are firmly fixed on the rotating shaft 112 through the fixing head 170, the isolating ring 160 and the annular step 113, and the centrifugal part 141 of the centrifugal body 140 extends into the backwashing body 130. The thickness of the isolation ring 160 is suitable so that there is a gap between the centrifuge 140 and the backwash body 130, the free end of the baffle 131 does not contact with the outer wall of the centrifuge 140, there is a gap between the top end of the backwash body 130 and the annular cover 142, the top of the inner cylinder 121 is located in the region between the downward extending edge of the annular cover 142 and the circumferential wall 144, and the top of the inner cylinder 121 is higher than the outer edge of the annular cover 142. The fixing head 170 has a fixing portion 171 fitted into the assembly hole 114 and an integrally molded tapered portion 172. The diameter of the bottom surface of the conical part 172 is larger than that of the third mounting hole, and the conical part 172 contacts with the end surface of the free end of the rotating shaft 112 and the filter screen on the bottom surface of the centrifugal body 140 to implement pressing and fixing, the conical part 172 also has a flow guiding function, and the outlet end of the pulp inlet pipe 200 is arranged right above the conical part 172. After the slurry enters the lower part of the centrifuge 140, under the centrifugal action, the liquid part will pass through the filter screen and enter the backwashing body 130, and solids such as drill cuttings, silt and the like are intercepted by the filter screen and remain in the centrifuge 140. Due to the impact of the ordered slurry and the centrifugal action, solids such as cuttings, silt, etc. slide along the inner wall of the centrifuge 140 and are eventually thrown into the area between the outer drum 122 and the inner drum 121. Part of the liquid in the backwashing body 130 is centrifugally thrown out into the inner cylinder 121 due to the blocking of the circumferential wall 144, and part of the liquid moves to the centrifugal body 140 due to the action of the flow deflector 131 to backwash the centrifugal body 140, so that the blockage of a filter screen is reduced.

And an outer cover 150 covering the top of the outer cylinder 122, the middle of which is recessed toward the inner cylinder 122 and penetrates through the inner cylinder to form a feed inlet 151, and the outer cover 150 can be removed during maintenance. The slurry inlet pipe 200 extends into the centrifugal body 140 through the feed inlet 151 and below.

In order to further improve the self-cleaning function, the shutdown maintenance times are reduced. The purifier 100 is further provided with a cleaning pipe 180. One end of the cleaning pipe 180 is positioned outside the inner cylinder 121 and the other end is positioned in the region between the bottom of the backwashing body 130 and the bottom of the centrifugal body 140, and the cleaning pipe 180 cannot collide with the backwashing body 130 and the centrifugal body 140. On the part of the cleaning pipe 180 located between the backwashing body 130 and the centrifugal body 140, a plurality of flushing holes are respectively opened towards the two sides of the backwashing body 130 and the centrifugal body 140. In the auxiliary cleaning, the backwashing body 130 and the centrifugal body 140 are cleaned by the high-pressure gas or the drilling fluid level cleaning medium, and the cleaning medium ejected at a high speed from the cleaning holes and the end of the cleaning pipe 180, thereby removing the clogging substances.

The utility model discloses a theory of operation is:

the drilling fluid to be recovered and purified is introduced into the purifier 100 from the slurry inlet pipe 200 according to a set flow rate, and the drilling fluid is uniformly distributed at the bottom in the centrifugal body 140 due to the diversion effect of the conical part 172. The liquid part rapidly passes through the filter screen and enters the backwashing body 130 under the rotating action of the centrifugal body 140. Due to the action of the deflector 131, part of the liquid changes direction under the centrifugal action, flows to the centrifugal body 140 for continuous back washing in a circulating way, and the rest of the liquid enters the inner cylinder 121 and then is discharged from the liquid discharge pipe 1213 for subsequent treatment. Solids such as cuttings and silt in the drilling fluid slide along the inner wall of the centrifuge 140 and are eventually thrown into the area between the outer drum 122 and the inner drum 121. Compared with the prior treatment equipment, the utility model discloses carry out the function combination, simplified equipment structure for clarification plant manufacturing cost reduces by a wide margin, can satisfy the operation requirement simultaneously.

Example two

In this embodiment, the drilling fluid recovery and purification system is composed of a plurality of purifiers 100 and a plurality of slurry inlet pipes 200, and the plurality of purifiers 100 are not connected and operate independently. The structure of the purifier 100 is the same as that in the first embodiment. In this embodiment, three purifiers 100 are selected to accelerate the drilling fluid recovery and purification process, as shown in fig. 5. If one of the devices fails, the rest devices can be used continuously.

EXAMPLE III

The difference from the first embodiment is that the drilling fluid recovery and purification system is formed by connecting a plurality of purifiers 100 in series, namely, a slurry pump 300 is installed between two purifiers 100 which are connected with the liquid outlet end of the previous purifier 100 and the inlet of the next purifier 100 and are adjacently connected. Each of the purifiers 100 has a structure similar to that of the first embodiment except that the sizes of the filter holes attached to the surface of the centrifuge body 140 are different, and the sizes of the filter holes are gradually decreased in the order of connection. The pipe structure of the latter purifier 100 for liquid feeding is similar to that of the slurry inlet pipe 200, and the outlet position is also similar. In this example, two purifiers 100 are selected to be connected in series, as shown in fig. 6. This embodiment may be classified according to the particle size of the solid material in the drilling fluid to reduce the operating pressure of the purifier 100.

Claims (10)

1. Drilling fluid is clarifier for recovery, including actuating mechanism, shell body, centrifuge and enclosing cover, actuating mechanism includes driving motor and has the pivot of annular step, driving motor fixes outside the shell body bottom, inside the shell body was stretched into to the pivot along shell body axial direction, the shell body comprises inner tube and the urceolus that is concentric structure and inner tube bottom is outstanding outside the urceolus bottom and is equipped with the fluid-discharge tube, and the top is less than the urceolus top, the centrifuge is the cap form, and surface attachment installs the filter screen, including centrifuge portion and ring lid portion, a plurality of through-holes have been seted up on the centrifuge portion, the ring lid edge is located inner tube top outside below, the enclosing cover lid closes at the outer casing top, middle part opening, its characterized in that: the centrifugal part of the centrifugal body is externally provided with a matched backwashing body, the inner wall of the backwashing body is randomly distributed and provided with a plurality of flow deflectors, an isolating ring is arranged between the centrifugal body and the backwashing body, the isolating ring, the centrifugal body and a filter screen are sequentially sleeved on one side part of an annular step at the free end of a rotating shaft and are tightly pressed and connected by a fixed head, and the axial centers of the backwashing body, the isolating ring and the centrifugal body coincide with the axial center of the outer shell and the rotation center of the driving motor.

2. The purifier for drilling fluid recovery according to claim 1, wherein: the central position of the bottom of the inner cylinder is sunken to the inner side of the inner cylinder in a truncated cone shape to form a sunken area, and the liquid discharge pipe is positioned on the outer side of the sunken area.

3. The purifier for drilling fluid recovery according to claim 1, wherein: and the free end of the flow deflector on the inner wall of the backwashing body faces to the axial center direction of the backwashing body.

4. The purifier for drilling fluid recovery according to claim 1, wherein: and a circle of circumferential wall is integrally formed on the lower surface of the annular cover part, the axial center of the circumferential wall is superposed with the center of the centrifugal body, and the lower end of the circumferential wall extends to the position below the inner side of the top of the inner cylinder body.

5. The purifier for drilling fluid recovery according to claim 1, wherein: the fixed head comprises a fixed part in threaded connection with the rotating shaft and a conical part which is integrally formed, and the conical part is matched with the annular step to compress and fix the backwashing body, the isolating ring, the centrifugal body and the filter screen.

6. The purifier for drilling fluid recovery according to claim 1, wherein: be equipped with discharge gate and cooperation discharge door on the urceolus circumference lateral wall, bottom surface edge evenly is equipped with three stabilizer blades.

7. The purifier for drilling fluid recovery according to claim 1, wherein: the purifier also comprises a cleaning pipe, one end of the cleaning pipe is positioned outside the inner cylinder body, the other end of the cleaning pipe is positioned in the area between the bottom of the backwashing body and the bottom of the centrifugal body, and the surface of the cleaning pipe is not contacted with the backwashing body and the centrifugal body.

8. The purifier for drilling fluid recovery according to claim 7, wherein: and a plurality of flushing holes are respectively formed on the two sides facing the backwashing body and the centrifugal body on the cleaning pipe part between the backwashing body and the centrifugal body.

9. Drilling fluid recovery clean system, including advancing the thick liquid pipe, its characterized in that: the system also comprises at least one purifier for recovering the drilling fluid as claimed in any one of claims 1 to 8, wherein each purifier is independent, and the slurry inlet pipes correspond to the purifiers one by one and extend into the purifiers.

10. Drilling fluid recovery clean system, including advancing the thick liquid pipe, its characterized in that: the system also comprises at least two purifiers for recovering the drilling fluid as claimed in any one of claims 1 to 8, wherein each purifier is sequentially connected in series, a slurry pump is arranged on a connected pipeline, and the slurry inlet pipe extends into the first purifier.

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