CN210396675U

CN210396675U - Back-cleaning sieve bed and vibrating screen

Info

Publication number: CN210396675U
Application number: CN201921100969.0U
Authority: CN
Inventors: 马翠林; 杨智钰; 董学嵩; 姚远
Original assignee: Sinopec Oilfield Service Corp; Sinopec Zhongyuan Petroleum Engineering Co Ltd; Drilling Engineering Technology Research Institute of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Current assignee: Sinopec Oilfield Service Corp; Sinopec Zhongyuan Petroleum Engineering Co Ltd; Drilling Engineering Technology Research Institute of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-04-24
Anticipated expiration: 2029-07-12

Abstract

The application discloses anti-sieve bed and shale shaker that washs, wherein, anti-sieve bed that washs includes: a frame for being disposed in a screen box of a vibrating screen; the coil pipe is arranged in the frame and located below a screen of the vibrating screen, a plurality of spray holes facing the screen are formed in the coil pipe, and a pressure medium is introduced into the coil pipe. The vibrating screen can be used for screening drilling fluid while introducing pressure medium into the coil pipe, the pressure medium has certain pressure and is sprayed out from the lower part of the screen through the spray holes, solid-phase objects blocked on the screen are sprayed out, and reverse cleaning of the screen is realized. The process can not cause shutdown influence on the work of the vibrating screen, timely cleaning of the screen is realized, blocking of solid-phase objects on the screen is avoided, the problem of slurry leakage of the vibrating screen during drilling is effectively solved, manual cleaning from the top of the vibrating screen is not needed, and manpower is saved.

Description

Back-cleaning sieve bed and vibrating screen

Technical Field

The utility model relates to a drilling fluid processing technology field, in particular to anti-washing sieve bed. The utility model discloses still relate to a shale shaker that contains this backwashing sieve bed.

Background

The drilling fluid solid phase control equipment is an important component of petroleum drilling equipment, and the vibrating screen is a core device in the solid phase control equipment. The vibrating screen can remove solid phases such as large-particle rock debris and the like in the drilling fluid. When the vibrating screen operates, the cuttings-carrying drilling fluid returning from the bottom of the well enters the surface of the screen of the vibrating screen, rock cuttings particles and drilling fluid smaller than the aperture of the screen mesh fall into a drilling fluid circulating system through the screen mesh under the vibration action of the vibrating screen, and the rock cuttings particles larger than the aperture of the screen mesh are screened out.

When the bits drilling fluid is taken in the screening to the shale shaker, the rock debris that is close to the mesh size of screen meshes is very easy virtual card on the sieve mesh surface, perhaps blocks into in the sieve mesh, causes the sieve mesh to block up, makes the screen cloth area of overflowing reduce, and screening performance descends, causes partial drilling fluid to come too late to screen and just directly flows into useless thick liquid pond from the screen cloth surface, forms and runs the thick liquid, has wasted the drilling fluid.

Also, drilling fluids often contain high viscosity polymers. The blockage of the sieve pores leads the polymers to be pasted on the sieve for a long time, so that the vibration mass of the sieve is increased, and the sieve is easy to tear and damage. In addition, the polymers exist for a long time, and are easy to form hard blocks, thereby further blocking the sieve holes and shortening the service life of the sieve.

In the existing method for clearing the blockage of the sieve pores of the vibrating screen, operators wash the surface of the sieve downwards and forwards from the upper part of the sieve of the vibrating screen by using high-pressure clear water in the pump stopping gap of a drilling machine, and wash away rock debris and polymers accumulated on the surface of the sieve under the washing of water pressure. This method may function to clean the screen of a vibrating screen. However, the method can only be carried out in the interval of stopping the pump, the cleaning is not timely, the problem of slurry leakage of the vibrating screen during drilling cannot be effectively solved, and meanwhile, the method is time-consuming and labor-consuming.

In conclusion, how to solve the problem that the screen of the vibrating screen cannot be cleaned in time becomes a problem to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a reverse cleaning sieve bed to and the screen cloth of time clearance shale shaker.

Another object of the utility model is to provide a shale shaker that contains this backwashing sieve bed to and time wash the screen cloth.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a backwash sieve bed comprising:

a frame for being disposed in a screen box of a vibrating screen;

the coil pipe is arranged in the frame and located below a screen of the vibrating screen, a plurality of spray holes facing the screen are formed in the coil pipe, and a pressure medium is introduced into the coil pipe.

Preferably, in the above-mentioned backwashing sieve bed, a nozzle disposed on the nozzle hole is further included.

Preferably, in the backwash sieve bed described above, the coil is a serpentine.

Preferably, in the backwashing sieve bed, the coil pipes are arranged in parallel.

Preferably, in the above-mentioned backwashing sieve bed, the frame includes a coaming and a rib plate disposed in the coaming, and the coil pipe support is connected to the rib plate and the coaming.

Preferably, in the backwashing sieve bed, the pressure medium in the coil is a liquid or a gas with a certain pressure.

The utility model also provides a vibrating screen, including sieve case and screen cloth, still include as above arbitrary the anti-sieve bed that washs.

Preferably, in the above vibrating screen, the number of the back-cleaning sieve beds is plural, and the back-cleaning sieve beds are arranged in the sieve box.

Preferably, in the above vibrating screen, one screen is provided on a frame of each of the backwashing screen beds.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a reverse cleaning sieve bed includes frame and coil pipe, and the frame sets up in the sieve case of shale shaker, and the coil pipe sets up in the frame and lies in the screen cloth below of shale shaker, and a plurality of orifices towards the screen cloth are seted up to the coil pipe. The vibrating screen can be used for screening drilling fluid while introducing pressure medium into the coil pipe, the pressure medium has certain pressure and is sprayed out from the lower part of the screen through the spray holes, solid-phase objects blocked on the screen are sprayed out, and reverse cleaning of the screen is realized. The process can not cause shutdown influence on the work of the vibrating screen, timely cleaning of the screen is realized, blocking of solid-phase objects on the screen is avoided, the problem of slurry leakage of the vibrating screen during drilling is effectively solved, manual cleaning from the top of the vibrating screen is not needed, and manpower is saved.

The utility model provides a shale shaker is owing to adopted the anti-washing sieve bed in this application, consequently, has realized carrying out reverse washing to the screen cloth, and this process can not produce the shut down influence to the work of shale shaker, has realized the timely washing of screen cloth, has avoided the jam of solid phase object on the screen cloth, has effectively solved the shale shaker that appears in creeping into and has run thick liquid problem, does not need the manual work to wash from the top of shale shaker simultaneously, has saved the manpower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a vibrating screen according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a backwashing sieve bed provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of another backwashing sieve bed according to an embodiment of the present invention.

Wherein, 1 is a sieve box, 2 is a sieve net, 3 is a back-cleaning sieve bed, 31 is a frame, 311 is a coaming plate, 312 is a rib plate, 32 is a coil pipe, and 33 is a nozzle.

Detailed Description

The core of the utility model is to provide a reverse cleaning sieve bed, which can clean the screen of the vibrating screen in time.

The utility model also provides a shale shaker that contains this anti-washing sieve bed, can in time wash the screen cloth.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an embodiment of the present invention provides a backwashing sieve bed 3, including a frame 31 and a coil 32, wherein the frame 31 is configured to be disposed in a sieve box 1 of a vibrating sieve; the coil pipe 32 is arranged in the frame 31 and located below the screen 2 of the vibrating screen, the coil pipe 32 is provided with a plurality of spray holes facing the screen 2, the coil pipe 32 is provided with an inlet, and pressure medium with certain pressure is introduced into the coil pipe 32 through the inlet.

This backwashing sieve bed 3 during operation can let in pressure medium to coil pipe 32 when the shale shaker carries out the drilling fluid screening, and pressure medium spouts from the below of screen cloth 2 through the orifice, erodees the screen cloth 2 back, rushes out the detritus of card income in the screen hole to screen cloth 2 surface, discharges by the shale shaker, has realized carrying out reverse washing to screen cloth 2. The process can not cause shutdown influence on the work of the vibrating screen, timely cleaning of the screen 2 is realized, blocking of solid-phase objects on the screen 2 is avoided, the problem of slurry leakage of the vibrating screen during drilling is effectively solved, waste of drilling fluid is reduced, manual cleaning from the top of the vibrating screen is not needed, and manpower is saved. The service life of the screen 2 is prolonged, and the drilling cost is saved.

Further, in this embodiment, the backwashing sieve bed 3 further includes the nozzles 33 disposed on the nozzle holes, the nozzles 33 have a scattering effect, and the pressure medium can be better sprayed to the back surface of the sieve net 2 by disposing the nozzles 33, so as to improve the flushing effect. Of course, it is also possible to dispense with the nozzle 33 and to carry out the jet flushing directly through the nozzle openings.

In the present embodiment, as shown in fig. 2, the coil 32 has an inlet and the other end is sealed, and the coil 32 is a series of coils connected in series, which is simple in structure.

As shown in fig. 3, the present embodiment provides another coil 32, in which the coil 32 is a parallel row of pipes, and specifically, the coil has a main pipe and a plurality of branch pipes connected to the main pipe, the ends of the branch pipes are sealed, the inlets are disposed on the main pipe, and the main pipe is connected to the branch pipes through a tee. The structure of the coil 32 may be other structures, and is not limited to the structure form exemplified in the embodiment.

In this embodiment, the frame 31 includes a shroud 311 and a rib 312 disposed in the shroud 311, and the coil 32 is supported and connected to the rib 312 and the shroud 311, specifically, the coil 32 passes through the rib 312 and the shroud 311, and the support firmness of the coil 32 is improved by the rib 312. The rib plate 312 is plural in number and arranged side by side in the shroud 311. The shroud 311 is intended to be secured to the side wall of the screen box 1.

Further, in this embodiment, pressure medium is the liquid or the gas that have certain pressure, and liquid is preferably clear water, and gas is preferably the air, because can let in compressed gas in the coil pipe 32, has avoided using the adverse effect of clear water to oil-based drilling fluid, consequently the utility model discloses still be applicable to the washing to oil-based drilling fluid.

Based on the anti-washing sieve bed 3 that any embodiment described above, the embodiment of the utility model provides a shale shaker is still provided, including sieve case 1 and screen cloth 2, still include the anti-washing sieve bed 3 as described in any embodiment above.

Because this shale shaker has adopted anti-washing sieve bed 3 in this application, consequently, can wash the washing to the back of screen cloth 2 when the shale shaker normally works, realized the real-time washing of screen cloth 2, avoided the jam of solid phase object on screen cloth 2, effectively solved the shale shaker that appears in creeping into and run the thick liquid problem, reduced the waste of drilling fluid, do not need the manual work to wash from the top of shale shaker simultaneously, saved the manpower. The service life of the screen 2 is prolonged, and the drilling cost is saved.

Further, in this embodiment, the quantity of backwashing sieve bed 3 is a plurality of, and backwashing sieve bed 3 arranges and sets up in sieve case 1, preferably, is provided with 3 ~ 5 backwashing sieve beds 3 on a shale shaker. Adopt a plurality of anti-forms of arranging that wash sieve bed 3, conveniently maintain anti-sieve bed 3 that washs, when a certain anti-sieve bed 3 that washs goes wrong, can change it alone, reduced cost of maintenance. Of course, the vibrating screen may also employ a large backwash screen bed 3.

Further, when the number of the backwashing sieve beds 3 is plural, one sieve mesh 2 is provided on the frame 31 of each backwashing sieve bed 3. Every anti-sieve bed 3 that washs corresponds a screen cloth 2 promptly to convenient maintenance to screen cloth 2 and anti-sieve bed 3 that washs, when a certain screen cloth 2 goes wrong, can change screen cloth 2 alone, reduced cost of maintenance, go wrong as a certain anti-sieve bed 3 simultaneously, can open the screen cloth 2 that should anti-sieve bed 3, take out anti-sieve bed 3 that washs, compare with adopting a big screen cloth 2, need not open whole screen cloth 2, conveniently change.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A backwash sieve bed comprising:

a frame for being disposed in a screen box of a vibrating screen;

2. The backwashing sieve bed of claim 1 further comprising a nozzle disposed on said spray aperture.

3. The backwash sieve bed of claim 1 wherein the coil is a serpentine tube.

4. The backwash sieve bed of claim 1 wherein said coil is a row of tubes connected in parallel.

5. The backwashing sieve bed of claim 1 wherein said frame includes a shroud and a web disposed in said shroud, said coil support being connected to said web and said shroud.

6. The backwash sieve bed of claim 1 wherein the pressure medium in the coil is a liquid or a gas under pressure.

7. A vibrating screen comprising a screen box and a screen mesh, further comprising a backwash screen bed as claimed in any one of claims 1 to 6.

8. The vibratory screen of claim 7, wherein the back-cleaning screen bed is a plurality of back-cleaning screen beds arranged in the screen box.

9. The vibratory screen of claim 8, wherein one of the screens is disposed on the frame of each of the backwash screen beds.