CN207296922U - Drilling fluid two-step purification system - Google Patents

Abstract

The drilling fluid two-step purification system that the utility model is created, by vibrating screen+centrifugal chiller into solving the problems, such as that conventional solid controlling system flow complexity, power consumption are big；Vibrating screen realizes 200 mesh sieve net partition sizes of API, and the drilling fluid total amount that processing well head returns out, can use single sieve structure of multilayer compass screen surface, three kinds of measures such as sieve parallel connection, high-strength filaments sieve more, improve vibrating screen treating capacity and clean-up effect；According to the specific requirement of weighted mud and non-weighted mud, centrifuge flow in series or in parallel is adjusted in due course, and the waste of barite material is reduced while reaching more preferable purification efficiency.

Description

Drilling fluid two-step purification system

Technical field

The invention belongs to oil-well drilling equipment field of engineering technology, more particularly, to drilling fluid two-step purification system.

Background technology

Petroleum geology probing drillng operation in, shaft bottom by drill bit fractured rock in the form of landwaste as drilling fluid follows Then ring is separated landwaste by the Solids control for drilling fluids equipment on ground, drilling fluid is pumped by drilling pump after separation to ground It is sent in pit shaft and continues cycling through use, landwaste is most important harmful solid phase in drilling fluid, it influences density, the viscosity of drilling fluid Etc. performance, the harmful solid phase removed in drilling fluid of being tried one's best under normal conditions using solid control equipment.In the prior art, use " is shaken more The level Four cleaning systems such as dynamic sieve+desander+desilter+centrifuge ", this routine solid controlling system flow is complicated, device configuration kind Class is more, and installation, care and maintenance are cumbersome, and except sand pump and except dredge pump power consumption is big, directly affects drilling efficiency and cost.

The content of the invention

The invention will solve the problems, such as to be to provide drilling fluid two-step purification system, using " multi-joint sieve+centrifuge " system System, realizes the purpose of energy saving wound effect.

In order to solve the above technical problems, the technical solution that the invention uses is：

Drilling fluid two-step purification system, including vibration screen banks, centrifugal chiller, 1# tank bodies, 2# tank bodies；

The vibration screen banks includes some vibrating screens, and the centrifugal chiller includes some centrifuges, some vibrating screens Parallel connection is fixedly installed in 1# tank bodies top, and the liquid outlet of vibrating screen is connected with 1# tank bodies；

Some centrifuges are fixedly installed in 2# tank bodies top, and by Valve controlling some centrifuges string simultaneously Connection, the 2# tank interiors are equipped with some centrifuges being correspondingly arranged with some centrifuges and suck storehouse；

The 1# tank bodies are connected with 2# tank bodies by pipeline；

The vibrating screen is multilayer compass screen surface structure, and each layer of compass screen surface selects the sieve of 190~250 mesh.

Further, including the vibration screen banks includes 3~5 vibrating screens；The centrifugal chiller includes 1# centrifuges and 2# Two desk centrifuge of centrifuge；

2# tank bodies include 1# centrifuges suction storehouse and 2# centrifuges suction storehouse, and 1# centrifuges suction storehouse and 2# centrifuges are inhaled Top of putting in storage is installed with 1# centrifuges and 2# centrifuges respectively；

1# tank bodies suck storehouse with the 1# centrifuges of 2# tank bodies by pipeline and are connected.

Further, the vibrating screen is 200 mesh sieve nets.

Further, the vibrating screen is 240 mesh sieve nets.

It should be noted that the system is made of multi-joint sieve module and centrifuge module.

Multi-joint sieve module is installed on 1# tanks face, using 3-5 platform Multilayer vibrating screens, is installed in parallel on a base, handles The drilling fluid that well head returns out.Because vibrating screen uses multilayer compass screen surface structure, it singly sieves disposal ability equivalent to former 2-3 platforms vibrating screen. More sieves sieve in parallel that can be applied more than 200 mesh of API, to remove 75 microns of bore meal particles.In the prior art, it is micro- to remove 75 Rice bore meal particles, 200 mesh sieve nets of API are also only installed in desanding, desilter cleaner bottom, if vibrating screen application API 200 Mesh sieve net, you can with without setting desander and desilter this two-step purification equipment.

Centrifuge module is installed on 2# tanks face, and centrifuge system is formed using 2 variable frequency centrifuges, real by valve transfer Now two kinds of purification processes in parallel and serial.During non-weighted mud condition, two desk centrifuges are in parallel to remove more than 2 microns drilling cuttings Grain, achievees the purpose that to remove harmful solid phase in drilling fluid；During weighted mud condition, the series connection of two desk centrifuges, removes 2-15 microns Harmful bore meal particles, and ensure that 15-75 microns of barite particles return to the circulatory system, the drilling fluid for saving costliness aggravates material Material.

The advantages of the invention and good effect are：

(1) it is big that conventional solid controlling system flow complexity, power consumption are solved into two-step purification system by vibrating screen+centrifugal chiller The problem of；

(2) vibrating screen realizes 200 mesh sieve net partition sizes of API, and the drilling fluid total amount that processing well head returns out, can use more Three kinds of measures such as single sieve structure of layer compass screen surface, more sieve parallel connections, high-strength filaments sieve, improve vibrating screen treating capacity and purification are imitated Fruit；

(3) according to the specific requirement of weighted mud and non-weighted mud, centrifuge flow in series or in parallel is adjusted in due course, The waste of barite material is reduced while reaching more preferable purification efficiency.

Brief description of the drawings

Fig. 1 is " multi-joint sieve+centrifuge " system layout figure in embodiment；

Fig. 2 is the structure diagram of 200 mesh sieve nets in embodiment, wherein string diameter 0.052mm, mesh 0.075mm, perforate face Product ratio 17%；

Fig. 3 is the structure diagram of 240 mesh sieve nets in embodiment, wherein string diameter 0.03mm, mesh 0.075mm, perforate face Product ratio 50%.

In figure：1-1# tank bodies, 2-2# tank bodies, 21-1# centrifuges suction storehouse, 22-2# centrifuges suction storehouse, 3- vibrating screens, 4-1# centrifuges, 5-2# centrifuges, 6-1# solution feed pumps, 7-2# solution feed pumps.

Embodiment

It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the invention can To be mutually combined.

In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ", The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are Based on orientation shown in the drawings or position relationship, it is for only for ease of description the invention and simplifies description, rather than instruction Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that For the limitation to the invention.In addition, term " first ", " second " etc. are only used for description purpose, and it is not intended that instruction Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined Feature can express or implicitly include one or more this feature.In the description of the invention, unless separately It is described, " multiple " are meant that two or more.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the invention Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition State concrete meaning of the term in the invention.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments creates.

Embodiment：

1st, it is laid out：

3-5 platform Multilayer vibrating screens are installed in parallel on 1# tank bodies, 2 desk centrifuges are installed on 2# tank bodies, 2# tank bases There are two solution feed pumps of 1# solution feed pumps and 2# solution feed pumps to give the drilling fluid pump that centrifuge is sucked in storehouse to corresponding centrifuge.

2nd, the selection of vibrating screen：

Measure 1 sieves screen area for selection bigger list.Total screen area of every vibrating screen is more than 6 ㎡, using multi-deck screen Face structure, the compass screen surface are more than 1 times bigger than the screen area that conventional vibration sieves.

Measure 2 is by the way of more sieves are in parallel.Limited according to tank space of planes, as far as possible more options vibrating screen number of units, one As be more than 4 vibrating screens.

Measure 3 is the sieve of selection high-strength filaments, improves sieve aperture perforated area ratio.General nominal sieve mesh number is per English Very little braiding twine number, and mesh wire diameter difference partition size difference.In order to reach 200 mesh of API (75 microns of mesh size) Separating effect, the standard network bolting silk net of nominal 200 mesh sieve net can be selected, nominal 240 mesh wire mesh can also be selected, though So it is 75 microns of partition size, but allows the mud amount of processing widely different.Such as the conventional common twine of 200 mesh, Partition size is 75 microns, perforated area ratio only 17%, it is difficult to handle well head and return out whole mud amounts；Sieved using 240 mesh filaments Net, partition size are 75 microns, and perforated area ratio brings up to 50%, can handle well head and return out whole mud, referring to Fig. 2, figure 3。

3rd, during fast drilling (drilling well early period, 1-1500 meters of depth) purification process：

Multi-shaker vibration sieve uses at the same time, installs 150 mesh above detailed catalogue sieves of API, the drilling well that purified treatment well head returns out Liquid, purified mud flow to 2# tank bodies.

2 solution feed pumps aspirate the drilling fluid in two centrifuges suction storehouse of 2# tank bodies at the same time, while supply 2 desk centrifuges Clean drilling liquid.

Purification process when the 4th, normally creeping into (drilling well intermediary and later stages)：

Multi-shaker vibration sieves, and installs 200 mesh above wire mesh of API, the drilling fluid that purified treatment well head returns out, after purification Mud flow to 2# tank bodies.

2# centrifuges are opened according to mud situation in due course, adjust the performance such as slope soil content and proportion, viscosity in drilling fluid.

It should be noted that the flow normally crept into and fast drilling flow are essentially the same, difference is only opens One desk centrifuge.

5th, purification process during weighted mud：

Multi-shaker vibration sieves, and installs 200 mesh above detailed catalogue sieves, the drilling fluid that purified treatment well head returns out, purified mud Slurry flows to 2# tank bodies.

After drilling fluid proportion is more than 1.4, adjustment centrifuge flow is considered as, the barite reduced in drilling fluid wastes.

Drilling fluid in the 1# centrifuges suction storehouse of 1# feed flow pumping 2# tank bodies, supplies 1# centrifuges.1# centrifuge tune 1000rpm-1500rpm rotating speeds are made into, the fluidised form solid phase of its ash pit outlet (containing most of barite and drilling cuttings in drilling fluid, 15-75 microns of particle size) enter circulatory system recycling.Its overflow port come out liquid phase (in drilling fluid containing 15 microns with Lower barite and drilling cuttings), drain into the suction storehouses of the 2# centrifuges of 2# tank bodies.

The mud in the 2# centrifuges suction storehouse of 2# feed flow pumping 2# tank bodies, is pumped to 2# centrifuges.2# centrifuges adjust Into 2200rpm-2800rpm rotating speeds, the solid phase (2-15 micron particles) that its ash pit comes out drains into mud sump, its overflow port comes out Cleaning liquid phase return the circulatory system.I.e. while drilling cuttings is excluded, the waste of barite is reduced.

One embodiment of the invention is described in detail above, but the content is only the invention Preferred embodiment, it is impossible to be construed as limiting the practical range of the invention.It is all to be made according to the invention application range All the changes and improvements etc., shall remain within the patent scope covered by the invention.

Claims (4)

1. drilling fluid two-step purification system, it is characterised in that including vibration screen banks, centrifugal chiller, 1# tank bodies, 2# tank bodies；

The vibration screen banks includes some vibrating screens, and the centrifugal chiller includes some centrifuges, and some vibrating screens are in parallel 1# tank bodies top is fixedly installed in, the liquid outlet of vibrating screen is connected with 1# tank bodies；

Some centrifuges are fixedly installed in 2# tank bodies top, and by Valve controlling some centrifuges connection in series-parallel, institute State 2# tank interiors and be equipped with some centrifuges suction storehouse being correspondingly arranged with some centrifuges；

The 1# tank bodies are connected with 2# tank bodies by pipeline；

The vibrating screen is multilayer compass screen surface structure, and each layer of compass screen surface selects the sieve of 190~250 mesh.

2. drilling fluid two-step purification system according to claim 1, it is characterised in that include 3 including the vibration screen banks ~5 vibrating screens；The centrifugal chiller includes two desk centrifuge of 1# centrifuges and 2# centrifuges；

2# tank bodies include 1# centrifuges suction storehouse and 2# centrifuges suction storehouse, 1# centrifuges suction storehouse and 2# centrifuges suction storehouse Top is installed with 1# centrifuges and 2# centrifuges respectively；

1# tank bodies suck storehouse with the 1# centrifuges of 2# tank bodies by pipeline and are connected.

3. drilling fluid two-step purification system according to claim 1, it is characterised in that the vibrating screen is 200 mesh sieve nets.

4. drilling fluid two-step purification system according to claim 1, it is characterised in that the vibrating screen is 240 mesh sieve nets.