CN218467574U

CN218467574U - High-concentration low-density solid-content mud collecting loop of drilling fluid negative pressure vibrating screen

Info

Publication number: CN218467574U
Application number: CN202221971241.7U
Authority: CN
Inventors: 何德麟; 赵振林; 宋良斌; 郑强; 谭培
Original assignee: Chengdu West Petroleum Equipment Co ltd
Current assignee: Chengdu West Petroleum Equipment Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2023-02-10
Anticipated expiration: 2032-07-28

Abstract

The utility model discloses a high-concentration low-density solid mud-containing collecting loop of a negative pressure vibrating screen for drilling fluid, which comprises a liquid phase groove arranged on a base below a negative pressure bin, a negative pressure pipe communicated with the negative pressure bin and the liquid phase groove, a middle bottom valve arranged at a discharge port at the middle section of the liquid phase groove, and an overflow plate and an external bottom valve arranged at a discharge port at the side edge of the liquid phase groove; the device also comprises an externally-matched collecting tank and an overflow pipe, wherein the height of the externally-matched collecting tank is lower than the setting height of a discharge port at the side edge of the liquid phase groove; the overflow pipe is communicated with the side discharging port of the liquid phase groove, and the output end of the overflow pipe is connected with the externally-matched collecting tank. The utility model discloses a from the overflow mode send into the high-concentration mud of negative pressure storehouse export special mud collection tank, centrifuge only handles this part account for the high-concentration mud that total circulation volume is at most less than 5%. Therefore, the startup time of the centrifuge can be reduced from 24 hours to less than 2 hours, and the startup time of leaving the centrifuge is greatly reduced.

Description

High-concentration low-density solid-content mud collecting loop of negative pressure vibrating screen for drilling fluid

Technical Field

The utility model relates to a technical field is collected to drilling fluid shale shaker mud, especially relates to a low dense mud that contains of drilling fluid negative pressure shale shaker high concentration collects return circuit admittedly.

Background

In recent years, a drilling fluid negative pressure vibrating screen is widely concerned and favored as a new generation vibrating screen developed on the basis of a conventional vibrating screen, and has a relatively obvious effect of reducing the liquid content of rock debris on the screen. The working principle of the drilling fluid negative pressure sieve is that the vibration of oversize products enables solid-liquid separation and negative pressure suction, so that the liquid content of oversize rock debris is lower. However, due to secondary crushing caused by vibration and suction of negative pressure, more tiny solid-phase particles are sucked into the liquid phase, so that the solid content of the screened mud in the negative pressure bin is high, the viscosity is high, and particularly, the screened mud has high-concentration low-density solid-phase substances. The previous negative pressure vibrating screen directly leads the part of high-depth low-density solid mud to directly enter a vibrating screen tank, which may cause the change of the components and parameters of the whole circulating drilling fluid. The current solution adopted in the drilling field is to increase the running time of the next-stage processing equipment centrifuge. Because of the large volume of drilling fluid that is circulated, i.e., the large volume that needs to be processed, the centrifuge must be run continuously to remove the low density solids from the mud.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve prior art problem, disclose a drilling fluid negative pressure shale shaker high concentration low density contains mud collection return circuit admittedly.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a low close solid mud that contains of drilling fluid negative pressure shale shaker high concentration collects return circuit, is including setting up the liquid phase groove on negative pressure storehouse below base, the negative pressure pipe of intercommunication negative pressure storehouse and liquid phase groove, setting up the middle bottom valve of discharging the mouth in liquid phase groove middle section and setting up at the overflow pipe and the external bottom valve of discharging the mouth of liquid phase groove side, the overflow pipe is linked together with liquid phase groove side discharge mouth, the overflow pipe output is connected with the external collection tank that joins in marriage.

The liquid phase groove is of a single-channel structure or a multi-channel structure;

the liquid phase groove with the single-channel structure is arranged right below the single-sieve negative pressure bin and is communicated with the sieve box negative pressure bin through a negative pressure pipe arranged on the bottom surface in the groove;

the liquid phase groove of the channel structure of the multi-connected negative pressure vibrating screen is arranged under the negative pressure bin of the multi-connected negative pressure vibrating screen box, and the negative pressure tube is communicated with the negative pressure bin of the multi-connected negative pressure vibrating screen box through a plurality of liquid phase grooves arranged on the bottom surface in the groove. Because the liquid level in the groove has a certain height (the height of the overflow plate), the negative pressure pipe keeps not to suck empty.

The middle bottom valve comprises a valve plate and a rotating shaft which are connected, the rotating shaft is opened and closed in two states within a 90-degree range, and liquid phase in the time slot is directly discharged into the tank body below the screen when the rotating shaft is opened.

The high-concentration low-density solid-content mud collecting loop of the drilling fluid negative pressure vibrating screen further comprises an externally-matched collecting tank, and the height of the externally-matched collecting tank is lower than the height of a discharging opening at the side edge of a liquid phase groove.

A high-concentration low-density solid-content mud collecting loop of a drilling fluid negative pressure vibrating screen also comprises an overflow plate fixed at a discharge port on the side edge of a liquid phase groove; the height of the overflow plate is smaller than that of the liquid phase groove, and high-concentration slurry flowing down from the negative pressure bin overflows after the accumulation height of the high-concentration slurry exceeds the height of the overflow plate and is discharged to an external collection tank through the overflow pipe.

The utility model has the advantages that:

the utility model discloses collect through special album dressing trough with the high-concentration mud of single sieve or the negative pressure storehouse export that allies oneself with the negative pressure shale shaker undersize, through getting into special mud collection tank from the overflow mode, centrifuge only accounts for the high-concentration mud that total circulation volume can not reach 5% to this part and handles. Therefore, the startup time of the centrifuge can be reduced from 24 hours to less than 2 hours, and the startup time of leaving the centrifuge is greatly reduced.

Drawings

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

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of the structure of the present invention;

in the figure: 1-liquid phase groove, 2-negative pressure tube, 3-middle bottom valve, 4-external bottom valve, 5-overflow tube.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

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 efforts belong to the protection scope of the present invention. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The invention provides a good solution, high-concentration slurry at an outlet of a negative pressure bin below a single-screen or multi-connected negative pressure vibrating screen is collected by a special slurry collecting groove and enters a special slurry collecting tank in a self-overflow mode, and a centrifugal machine only processes the high-concentration slurry accounting for less than 5% of the total circulating amount. Therefore, the startup time of the centrifuge can be reduced from 24 hours to less than 2 hours, and the startup time of leaving the centrifuge is greatly reduced

As shown in fig. 1-2, a high-concentration low-density solid mud collecting loop of a drilling fluid negative pressure vibrating screen comprises a liquid phase groove 1 arranged on a base below a negative pressure bin, a negative pressure pipe 2 communicating the negative pressure bin with the liquid phase groove 1, a middle bottom valve 3 arranged at a discharge port at the middle section of the liquid phase groove 1, an overflow pipe 5 arranged at a discharge port at the side edge of the liquid phase groove 1, an overflow plate and an external bottom valve 4; the overflow pipe 5 is communicated with a discharge port on the side edge of the liquid phase groove 1, and the output end of the overflow pipe 5 is connected with an externally-matched collecting tank; the height of the overflow plate is less than that of the liquid phase groove 1, and the high-concentration slurry flowing down from the negative pressure bin overflows after the accumulation height of the high-concentration slurry exceeds the height of the overflow plate and is discharged to an externally-matched collecting tank through an overflow pipe 5.

The high-concentration low-density solid-content mud collecting loop of the drilling fluid negative pressure vibrating screen further comprises an externally-matched collecting tank, and the height of the externally-matched collecting tank is lower than the setting height of a discharging opening at the side edge of the liquid phase groove 1. Still include overflow pipe 5, overflow pipe 5 is linked together with the mouth is arranged to the liquid phase groove 1 side, and 5 outputs of overflow pipe are connected with the outer collecting tank that joins in marriage. The overflow plate is fixed at the discharge outlet on the side of the liquid phase groove 1; the height of the overflow plate is less than that of the liquid phase groove 1, and the high-concentration slurry flowing down from the negative pressure bin overflows after the accumulation height of the high-concentration slurry exceeds the height of the overflow plate and is discharged to an external collection tank through an overflow pipe 5.

The lowest end of the negative pressure bin is provided with a liquid phase outlet which is connected with a hose (the hose is the negative pressure tube 2), the other end of the negative pressure bin is placed on the bottom surface in the liquid phase groove, a liquid level with a certain height is formed in the groove along with the outflow of the liquid phase, and negative pressure is formed in the bin after the outlet of the negative pressure tube is submerged due to continuous air draft in the negative pressure bin; when the liquid level exceeds the height of the overflow plate, the redundant liquid can cross the overflow plate and is discharged to an external slurry preparation collecting tank from the overflow pipe by means of self weight.

The liquid phase tank 1 is of a single-channel structure or a multi-channel structure;

the liquid phase tank 1 with a single-channel structure is arranged right below the single-sieve negative pressure bin and is communicated with the sieve box negative pressure bin through the negative pressure pipe 2 which is arranged on the bottom surface in the tank;

the liquid phase groove 1 of the channel structure of the multi-connected negative pressure vibrating screen is arranged under the negative pressure bin of the multi-connected negative pressure vibrating screen box, and the negative pressure pipe 2 is communicated with the negative pressure bin of the multi-connected negative pressure vibrating screen box through a plurality of negative pressure pipes arranged on the bottom surface in the groove.

The liquid phase groove 1 is a groove body designed on the base, so that the liquid phase of the negative pressure bin of the sieve box flows into the groove through the negative pressure pipe 2 and can be reserved with a certain depth (the depth is used for forming a negative pressure liquid seal at a negative pressure pipe opening). Taking a duplex negative pressure sieve as an example, two single sieve bases are connected together, a liquid phase tank 1 is also communicated (an operation channel is arranged between the two bases), and a middle bottom valve 3 is designed in the middle, so that the liquid phase in the tank can be directly returned to a tank (the vibrating sieve base is arranged on the upper plane of the vibrating sieve tank).

The middle bottom valve 3 comprises a valve plate and a rotating shaft which are connected, the rotating shaft is opened and closed in two states within a 90-degree range, and liquid phase in the time slot is directly discharged into the tank body below the screen when the rotating shaft is opened.

The middle bottom valve 3 and the external bottom valve 4 are used for cleaning sediments in the tank in the drilling process or after drilling is finished, and the liquid in the tank can directly return to the tank by opening the middle bottom valve 3; the external bottom valve 4 is opened, so that liquid in the tank can be connected into a collection tank or other volumes through a hose, and the liquid in the tank can be discharged more completely by opening the external bottom valve 4.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A high-concentration low-density solid mud collecting loop of a drilling fluid negative pressure vibrating screen is characterized by comprising a liquid phase groove (1) arranged on a base below a negative pressure bin, a negative pressure pipe (2) communicated with the negative pressure bin and the liquid phase groove (1), a middle bottom valve (3) arranged at a discharge port at the middle section of the liquid phase groove (1), an overflow pipe (5) arranged at a discharge port at the side edge of the liquid phase groove (1), an overflow plate and an external bottom valve (4); the overflow pipe (5) is communicated with a discharge port on the side of the liquid phase groove (1), and the output end of the overflow pipe (5) is connected with an externally-matched collecting tank; the height of the overflow plate is less than that of the liquid phase groove (1), and high-concentration slurry flowing down from the negative pressure bin overflows after the accumulation height of the high-concentration slurry exceeds the height of the overflow plate and is discharged to an external collection tank through an overflow pipe (5).

2. The high-concentration low-density solid-containing mud collecting loop of the negative pressure drilling fluid vibrating screen is characterized in that the liquid phase groove (1) is of a single-channel structure or a multi-channel structure;

the liquid phase groove (1) with a single-channel structure is arranged right below the single-sieve negative pressure bin and is communicated with the sieve box negative pressure bin through the negative pressure pipe (2) arranged on the bottom surface in the groove;

the liquid phase groove (1) of the channel structure of the multi-connected negative pressure vibrating screen is arranged under the negative pressure bin of the multi-connected negative pressure vibrating screen box, and the negative pressure pipe (2) is communicated with the negative pressure bin of the multi-connected negative pressure vibrating screen box through a plurality of negative pressure pipes arranged on the bottom surface in the groove.

3. The high-concentration low-density solid mud collecting circuit of the drilling fluid negative pressure vibrating screen is characterized in that the middle bottom valve (3) comprises a valve plate and a rotating shaft which are connected, the rotating shaft is opened and closed in two states within a 90-degree range, and liquid phase in a time slot is directly discharged into a tank body below the screen when the rotating shaft is opened.

4. The high-concentration low-density solid mud collecting loop of the negative pressure vibrating screen for drilling fluid is characterized by further comprising an externally-matched collecting tank, wherein the height of the externally-matched collecting tank is lower than the height of a discharging opening on the side edge of the liquid phase groove (1).