CN106481292B - Drilling rig solid control and environmental protection integrated circulation system - Google Patents
Drilling rig solid control and environmental protection integrated circulation system Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 98
- 239000007787 solid Substances 0.000 title claims description 24
- 230000007613 environmental effect Effects 0.000 title claims description 22
- 239000007791 liquid phase Substances 0.000 claims abstract description 53
- 239000007790 solid phase Substances 0.000 claims abstract description 35
- 238000004062 sedimentation Methods 0.000 claims description 62
- 239000002002 slurry Substances 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 52
- 238000000926 separation method Methods 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 7
- 238000001556 precipitation Methods 0.000 abstract 3
- 239000007788 liquid Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 12
- 238000000746 purification Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
- E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
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- Environmental & Geological Engineering (AREA)
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Abstract
Description
技术领域Technical Field
本发明涉及钻井辅助技术领域，特别涉及一种钻机固控环保一体化循环系统。The invention relates to the technical field of drilling assistance, and in particular to a drilling rig solid control and environmental protection integrated circulation system.
背景技术Background technique
钻井液是用于钻井的一种循环流体，是钻探过程中，孔内使用的循环冲洗介质。钻井液具有携带和悬浮井筒中的岩屑、平衡地层压力、冷却润滑钻头和钻具、保护井壁和油气层以及提高钻井速度等功能，在钻井过程中具有非常重要的作用。Drilling fluid is a circulating fluid used for drilling. It is a circulating flushing medium used in the hole during the drilling process. Drilling fluid has the functions of carrying and suspending cuttings in the wellbore, balancing formation pressure, cooling and lubricating the drill bit and drilling tools, protecting the well wall and oil and gas layer, and increasing the drilling speed. It plays a very important role in the drilling process.
钻井废液(泥浆)是一种多相稳定胶态悬浮体系,含有多种无机盐、有机处理剂、聚合物、表面活性剂等物质，其中所含油类、盐类、钻井液添加剂以及一些可溶性的重金属离子污染土壤、水体，影响动植物生长，危害人类健康，需要及时对钻井废液进行处理。常规的钻井液循环系统仅仅依靠钻井平台循环系统自身的振动筛，除砂器，除泥器以及离心机将从井眼中循环出来的钻井液进行处理。具体地，自井口返出的带有大量岩屑(有害固相)的钻井液，通过井口高架纵横钻井液槽(带有一定坡度)在重力作用下流到第一级净化设备-振动筛的入口，经过振动筛的筛分将较大的有害固相颗粒筛出并排走。当钻井液出现气浸时，通过振动筛得到净化的钻井液净化罐的沉淀罐内，利用除气器真空泵的抽吸作用，在真空罐内造成负压，钻井液在大气压的作用下进入除气器内进行分离，分理出的气体排往井架顶部放空，除气后的钻井液在排空腔转子的驱动下排进钻井液2号罐中。在钻井液不含气体的情况下，可以将除气器作为大功率的钻井液搅拌器使用，保持净化罐内的钻井液不沉淀。通过振动筛得到净化的钻井液进入钻井液罐的沉淀罐内，利用除砂砂泵将钻井液加压进入第二级净化设备-联合清洁器的除砂器内，利用旋流原理进行再次分离，将分离中点d50≥70的有害固相清除。除砂后的钻井液经过除砂器的溢流管线排进钻井液3号罐中。根据钻井液净化系统的总体要求，除砂器的处理量达到正常钻井液循环量的125％以上，使得在净化罐内的钻井液能够得到充分的反复净化，减少钻井液的含沙量。通过除砂器得到净化的钻井液利用除泥砂泵将钻井液加压进入第三级净化设备-联合清洁器的除泥器内，利用旋流原理进行再次分离，将分离中点d50＝36um以上的有害固相清除。除泥后的钻井液经过除泥器的溢流管线排进钻井液4号罐中。除砂器和除泥器排出的底流中含有一定的钻井液，二者的底流会合后进入联合清洁器的振动筛内进行再次筛分，钻井液回收进钻井液罐，砂泥排出。经过三级净化的钻井液中仍含有大量的有害固相，当钻井液为非加重状态时，利用两台离心机并联使用，将钻井液中的大于5um的有害固相进行清除，处理后的钻井液排进钻井液净化罐的第五仓中。Drilling waste fluid (mud) is a multiphase stable colloidal suspension system, containing a variety of inorganic salts, organic treatment agents, polymers, surfactants and other substances. The oils, salts, drilling fluid additives and some soluble heavy metal ions contained therein pollute the soil and water, affect the growth of plants and animals, and endanger human health. It is necessary to treat the drilling waste fluid in a timely manner. The conventional drilling fluid circulation system only relies on the vibrating screen, desander, desilter and centrifuge of the drilling platform circulation system to treat the drilling fluid circulating from the wellbore. Specifically, the drilling fluid with a large amount of rock cuttings (harmful solid phase) returned from the wellhead flows to the entrance of the first-level purification equipment-vibrating screen under the action of gravity through the wellhead elevated vertical and horizontal drilling fluid tank (with a certain slope), and the larger harmful solid phase particles are screened out and discharged after screening by the vibrating screen. When gas leaching occurs in the drilling fluid, the drilling fluid purified by the vibrating screen is placed in the sedimentation tank of the purification tank. The vacuum pump of the degasser is used to create negative pressure in the vacuum tank. The drilling fluid enters the degasser under the action of atmospheric pressure for separation. The separated gas is discharged to the top of the derrick for venting. The degassed drilling fluid is discharged into the drilling fluid tank No. 2 under the drive of the exhaust cavity rotor. When the drilling fluid does not contain gas, the degasser can be used as a high-power drilling fluid agitator to keep the drilling fluid in the purification tank from settling. The drilling fluid purified by the vibrating screen enters the sedimentation tank of the drilling fluid tank. The desander pump is used to pressurize the drilling fluid into the desander of the second-stage purification equipment-the combined cleaner. The cyclone principle is used for re-separation to remove the harmful solid phase with the separation midpoint d50≥70. The desandered drilling fluid is discharged into the drilling fluid tank No. 3 through the overflow pipeline of the desander. According to the overall requirements of the drilling fluid purification system, the processing capacity of the desander reaches more than 125% of the normal drilling fluid circulation volume, so that the drilling fluid in the purification tank can be fully and repeatedly purified, reducing the sand content of the drilling fluid. The drilling fluid purified by the desander is pressurized by the desilter pump to enter the third-level purification equipment-the desilter of the combined cleaner, and the cyclone principle is used for re-separation to remove the harmful solid phase above the separation midpoint d50=36um. The desilted drilling fluid is discharged into the drilling fluid tank No. 4 through the overflow pipeline of the desilter. The bottom flow discharged by the desander and desilter contains a certain amount of drilling fluid. After the bottom flow of the two meets, it enters the vibrating screen of the combined cleaner for re-screening, and the drilling fluid is recovered into the drilling fluid tank, and the sand and mud are discharged. The drilling fluid after three-stage purification still contains a large amount of harmful solid phase. When the drilling fluid is in a non-weighted state, two centrifuges are used in parallel to remove harmful solid phases larger than 5um in the drilling fluid. The treated drilling fluid is discharged into the fifth compartment of the drilling fluid purification tank.
传统的钻井岩无害化处理及资源化利用工艺只能够在钻井平台上实现泥浆的简单过滤和固液分离，处理能力较低，且固液分离不彻底，回收的液态成分杂质较多，影响钻井液的再利用效果。The traditional drilling rock harmless treatment and resource utilization process can only achieve simple filtration and solid-liquid separation of mud on the drilling platform. The processing capacity is low, and the solid-liquid separation is not thorough. The recovered liquid components contain more impurities, which affects the reuse effect of the drilling fluid.
因此，提供一种钻机固控环保一体化循环系统，以期具有较强的固液分离处理能力，减少回收液态中的固态杂质，提高钻井液的再利用效果，进而提高资源利用化程度和环保性能，就成为本领域技术人员亟需解决的问题。Therefore, providing a drilling rig solid control and environmental protection integrated circulation system with a strong solid-liquid separation and processing capability, reducing solid impurities in the recovered liquid, improving the reuse effect of drilling fluid, and further improving the resource utilization degree and environmental protection performance has become a problem that technical personnel in this field need to solve urgently.
发明内容Summary of the invention
本发明的目的是提供一种钻机固控环保一体化循环系统，以期具有较强的固液分离处理能力，减少回收液态中的固态杂质，提高钻井液的再利用效果，进而提高资源利用化程度和环保性能。The purpose of the present invention is to provide a drilling rig solid control and environmental protection integrated circulation system, so as to have a strong solid-liquid separation and processing capability, reduce solid impurities in the recovered liquid, improve the reuse effect of drilling fluid, and further improve the resource utilization degree and environmental protection performance.
为解决上述技术问题，本发明提供一种钻机固控环保一体化循环系统，包括以其进口端与钻井平台相连通的高架管，所述高架管的出口端连通有沉淀罐；In order to solve the above technical problems, the present invention provides a drilling rig solid control and environmental protection integrated circulation system, comprising an elevated pipe whose inlet end is connected to the drilling platform, and the outlet end of the elevated pipe is connected to a sedimentation tank;
所述沉淀罐的液相出口与钻井平台的二号罐相连通，其固液相出口与设置于所述二号罐上方的两联筛相连通；The liquid phase outlet of the sedimentation tank is connected to the No. 2 tank of the drilling platform, and the solid and liquid phase outlets thereof are connected to the two-combination screen arranged above the No. 2 tank;
所述两联筛的液相出口与所述沉淀罐相连通，其固相出口连通有甩干机，所述甩干机设置于所述二号罐内，形成于所述二号罐的末节罐体，所述甩干机的液相出口与钻井平台的三号罐中的离心机相连通，其固相出口通过螺旋输送机与堆放区相连通；The liquid phase outlet of the two-stage screen is connected to the sedimentation tank, and the solid phase outlet thereof is connected to a drier, which is arranged in the No. 2 tank and formed in the last tank body of the No. 2 tank. The liquid phase outlet of the drier is connected to the centrifuge in the No. 3 tank of the drilling platform, and the solid phase outlet thereof is connected to the stacking area through a screw conveyor;
所述二号罐的液相出口与所述三号罐相连通，所述三号罐的液相出口与所述离心机相连通，所述离心机的液相出口与所述三号罐相连通，所述离心机的固相出口与所述螺旋输送机相连通。The liquid phase outlet of the No. 2 tank is connected to the No. 3 tank, the liquid phase outlet of the No. 3 tank is connected to the centrifuge, the liquid phase outlet of the centrifuge is connected to the No. 3 tank, and the solid phase outlet of the centrifuge is connected to the screw conveyor.
进一步地，还包括旋流器，所述二号罐的固相出口通过抽砂泵与所述旋流器相连通，所述旋流器的液相出口与所述二号罐相连通，其固相出口与所述沉淀罐相连通。Furthermore, it also includes a cyclone, the solid phase outlet of the No. 2 tank is connected to the cyclone through a sand pump, the liquid phase outlet of the cyclone is connected to the No. 2 tank, and its solid phase outlet is connected to the sedimentation tank.
进一步地，还包括分配器，所述沉淀罐通过所述分配器与所述高架管的出口端相连通。Furthermore, it also includes a distributor, and the sedimentation tank is connected with the outlet end of the elevated pipe through the distributor.
进一步地，所述沉淀罐包括并列设置的第一沉淀罐和第二沉淀罐，所述分配器的第一出口与所述第一沉淀罐相连通，其第二出口与所述第二沉淀罐相连通。Furthermore, the sedimentation tank comprises a first sedimentation tank and a second sedimentation tank which are arranged in parallel, the first outlet of the distributor is connected to the first sedimentation tank, and the second outlet of the distributor is connected to the second sedimentation tank.
进一步地，所述第一沉淀罐的出料口与所述第二沉淀罐的进料口相连通。Furthermore, the discharge port of the first sedimentation tank is communicated with the feed port of the second sedimentation tank.
进一步地，所述沉淀罐内设置有三级锥形仓体，各锥形仓体在开口端相连通。Furthermore, three levels of conical bins are arranged in the sedimentation tank, and the conical bins are connected at the opening ends.
进一步地，还包括用于储存钻井浆液的储浆罐，所述储浆罐设置于所述钻井平台上。Furthermore, it also includes a slurry storage tank for storing drilling slurry, and the slurry storage tank is arranged on the drilling platform.
本发明所提供的钻机固控环保一体化循环系统包括以其进口端与钻井平台相连通的高架管，所述高架管的出口端连通有沉淀罐；其中，所述沉淀罐的液相出口与钻井平台的二号罐相连通，其固液相出口与设置于所述二号罐上方的两联筛相连通；所述两联筛的液相出口与所述沉淀罐相连通，其固相出口连通有甩干机，所述甩干机设置于所述二号罐内，形成于所述二号罐的末节罐体，所述甩干机的液相出口与钻井平台的三号罐中的离心机相连通，其固相出口通过螺旋输送机与堆放区相连通；所述二号罐的液相出口与所述三号罐相连通，所述三号罐的液相出口与所述离心机相连通，所述离心机的液相出口与所述三号罐相连通，所述离心机的固相出口与所述螺旋输送机相连通。The drilling rig solid control and environmental protection integrated circulation system provided by the present invention comprises an elevated pipe connected to the drilling platform at its inlet end, and the outlet end of the elevated pipe is connected to a sedimentation tank; wherein, the liquid phase outlet of the sedimentation tank is connected to the No. 2 tank of the drilling platform, and its solid and liquid phase outlets are connected to a two-unit screen arranged above the No. 2 tank; the liquid phase outlet of the two-unit screen is connected to the sedimentation tank, and its solid phase outlet is connected to a dryer, the dryer is arranged in the No. 2 tank and formed in the last tank body of the No. 2 tank, the liquid phase outlet of the dryer is connected to the centrifuge in the No. 3 tank of the drilling platform, and its solid phase outlet is connected to the stacking area through a screw conveyor; the liquid phase outlet of the No. 2 tank is connected to the No. 3 tank, the liquid phase outlet of the No. 3 tank is connected to the centrifuge, the liquid phase outlet of the centrifuge is connected to the No. 3 tank, and the solid phase outlet of the centrifuge is connected to the screw conveyor.
在施工过程中，通过高架管流出的将废弃钻井液不经过振动筛而是直接进入沉淀罐，钻井液的液相集中在沉淀罐的上部并进入振动筛，该振动筛是设置在二号罐上方的两联筛，经两联筛振动分离后的固相进入二号罐中的甩干机进行甩干，液相重新返回沉淀罐再次进行溢流沉淀处理，甩干机出来的液相进到三号灌顶上的离心机，二号灌流出来的液相进三号灌除泥，除泥后的液相也进入离心机，也就是说离心机两股液相流入(一个三号灌的、一个甩干机的)，在离心机里离心分离后的液相作为上清液进三号灌回用，甩干机和离心机出来的固相一起通过螺旋输送机输送到堆放区，并在堆放区内形成吨包，然后把吨包摆放摞起来，从而完成固液分离、液态回用、固态回收的过程。该循环系统通过多级分离、多层循环实现废弃钻井液的多级多次分离，具有较强的固液分离处理能力，减少了回收液态中的固态杂质，提高了钻井液的再利用效果，进而提高了资源利用化程度和环保性能。During the construction process, the waste drilling fluid flowing out through the overhead pipe does not pass through the vibrating screen but directly enters the sedimentation tank. The liquid phase of the drilling fluid is concentrated in the upper part of the sedimentation tank and enters the vibrating screen. The vibrating screen is a double screen arranged above the No. 2 tank. The solid phase after vibration separation by the double screen enters the spin dryer in the No. 2 tank for drying, and the liquid phase returns to the sedimentation tank for overflow sedimentation treatment again. The liquid phase coming out of the spin dryer enters the centrifuge on the top of the No. 3 tank, and the liquid phase flowing out of the No. 2 tank enters the No. 3 tank for mud removal. The liquid phase after mud removal also enters the centrifuge, that is to say, two liquid phases flow into the centrifuge (one from the No. 3 tank and the other from the spin dryer). The liquid phase after centrifugal separation in the centrifuge enters the No. 3 tank as the supernatant for reuse. The solid phases coming out of the spin dryer and the centrifuge are transported to the stacking area through a screw conveyor, and form ton bags in the stacking area. Then the ton bags are stacked up, thereby completing the process of solid-liquid separation, liquid reuse, and solid recovery. The circulation system achieves multi-stage and multiple separation of waste drilling fluid through multi-stage separation and multi-layer circulation. It has strong solid-liquid separation and processing capabilities, reduces solid impurities in the recovered liquid, improves the reuse effect of drilling fluid, and thus improves the degree of resource utilization and environmental protection performance.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明所提供的钻机固控环保一体化循环系统一种具体实施方式的流程图；FIG1 is a flow chart of a specific implementation of the drilling rig solid control and environmental protection integrated circulation system provided by the present invention;
图2为图1所示循环系统中沉淀罐一种具体实施方式的结构示意图。FIG. 2 is a schematic structural diagram of a specific implementation of a sedimentation tank in the circulation system shown in FIG. 1 .
其中，图中箭头方向为各相成分流动方向。The arrow direction in the figure indicates the flow direction of each phase component.
具体实施方式Detailed ways
本发明的核心是提供一种钻机固控环保一体化循环系统，以期具有较强的固液分离处理能力，减少回收液态中的固态杂质，提高钻井液的再利用效果，进而提高资源利用化程度和环保性能。The core of the present invention is to provide an integrated circulation system for solid control and environmental protection of drilling rigs, so as to have a strong solid-liquid separation and processing capability, reduce solid impurities in the recovered liquid, improve the reuse effect of drilling fluid, and thus improve the degree of resource utilization and environmental protection performance.
为了使本技术领域的人员更好地理解本发明的技术方案，下面结合附图和具体实施方式对本发明作进一步的详细说明。In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
请参考图1，图1为本发明所提供的钻机固控环保一体化循环系统一种具体实施方式的流程图。Please refer to FIG. 1 , which is a flow chart of a specific implementation of the drilling rig solid control and environmental protection integrated circulation system provided by the present invention.
在一种具体实施方式中，本发明所提供的钻机固控环保一体化循环系统包括以其进口端与钻井平台相连通的高架管1，所述高架管1的出口端连通有沉淀罐2；其中，所述沉淀罐2的液相出口与钻井平台的二号罐3相连通，其固液相出口与设置于所述二号罐3上方的两联筛4相连通；所述两联筛4的液相出口与所述沉淀罐2相连通，其固相出口连通有甩干机5，所述甩干机5设置于所述二号罐3内，形成于所述二号罐3的末节罐体，所述甩干机5的液相出口与钻井平台的三号罐6中的离心机7相连通，其固相出口通过螺旋输送机与堆放区8相连通；所述二号罐3的液相出口与所述三号罐6相连通，所述三号罐6的液相出口与所述离心机7相连通，所述离心机7的液相出口与所述三号罐6相连通，所述离心机7的固相出口与所述螺旋输送机相连通。In a specific embodiment, the drilling rig solid control and environmental protection integrated circulation system provided by the present invention includes an elevated pipe 1 connected to the drilling platform at its inlet end, and the outlet end of the elevated pipe 1 is connected to a sedimentation tank 2; wherein the liquid phase outlet of the sedimentation tank 2 is connected to the No. 2 tank 3 of the drilling platform, and its solid-liquid phase outlet is connected to a two-piece screen 4 arranged above the No. 2 tank 3; the liquid phase outlet of the two-piece screen 4 is connected to the sedimentation tank 2, and its solid phase outlet is connected to a dryer 5, the dryer 5 is arranged in the No. 2 tank 3, formed in the last tank body of the No. 2 tank 3, the liquid phase outlet of the dryer 5 is connected to the centrifuge 7 in the No. 3 tank 6 of the drilling platform, and its solid phase outlet is connected to the stacking area 8 through a screw conveyor; the liquid phase outlet of the No. 2 tank 3 is connected to the No. 3 tank 6, the liquid phase outlet of the No. 3 tank 6 is connected to the centrifuge 7, the liquid phase outlet of the centrifuge 7 is connected to the No. 3 tank 6, and the solid phase outlet of the centrifuge 7 is connected to the screw conveyor.
在施工过程中，通过高架管1流出的将废弃钻井液不经过振动筛而是直接进入沉淀罐2，钻井液的液相集中在沉淀罐2的上部并进入振动筛，该振动筛是设置在二号罐3上方的两联筛4，经两联筛4振动分离后的固相进入二号罐3中的甩干机5进行甩干，液相重新返回沉淀罐2再次进行溢流沉淀处理，甩干机5出来的液相进到三号灌顶上的离心机7，二号灌流出来的液相进三号灌除泥，除泥后的液相也进入离心机7，也就是说离心机7两股液相流入(一个三号灌的、一个甩干机5的)，在离心机7里离心分离后的液相作为上清液进三号灌回用，甩干机5和离心机7出来的固相一起通过螺旋输送机输送到堆放区8，并在堆放区8内形成吨包，然后把吨包摆放摞起来，从而完成固液分离、液态回用、固态回收的过程。该循环系统通过多级分离、多层循环实现废弃钻井液的多级多次分离，具有较强的固液分离处理能力，减少了回收液态中的固态杂质，提高了钻井液的再利用效果，进而提高了资源利用化程度和环保性能。During the construction process, the waste drilling fluid flowing out through the overhead pipe 1 does not pass through the vibrating screen but directly enters the sedimentation tank 2. The liquid phase of the drilling fluid is concentrated in the upper part of the sedimentation tank 2 and enters the vibrating screen. The vibrating screen is a double screen 4 arranged above the No. 2 tank 3. The solid phase after vibration separation by the double screen 4 enters the spin dryer 5 in the No. 2 tank 3 for drying, and the liquid phase returns to the sedimentation tank 2 for overflow sedimentation treatment again. The liquid phase coming out of the spin dryer 5 enters the centrifuge 7 on the top of the No. 3 tank, and the liquid phase flowing out of the No. 2 tank enters the No. 3 tank for mud removal. The liquid phase after mud removal also enters the centrifuge 7, that is, two liquid phases flow into the centrifuge 7 (one from the No. 3 tank and the other from the spin dryer 5). The liquid phase after centrifugal separation in the centrifuge 7 is used as the supernatant and enters the No. 3 tank for reuse. The solid phases coming out of the spin dryer 5 and the centrifuge 7 are transported to the stacking area 8 through a screw conveyor, and form ton bags in the stacking area 8, and then the ton bags are stacked up, thereby completing the process of solid-liquid separation, liquid reuse, and solid recovery. The circulation system achieves multi-stage and multiple separation of waste drilling fluid through multi-stage separation and multi-layer circulation. It has strong solid-liquid separation and processing capabilities, reduces solid impurities in the recovered liquid, improves the reuse effect of drilling fluid, and thus improves the degree of resource utilization and environmental protection performance.
进一步地，该钻机固控环保一体化循环系统还包括旋流器9，所述二号罐3的固相出口通过抽砂泵与所述旋流器9相连通，所述旋流器9的液相出口与所述二号罐3相连通，其固相出口与所述沉淀罐2相连通。这样，在上述固液分离进行的同时，二号灌中的沉砂通过抽砂泵抽到旋流器9，过旋流器9旋流分离后，液相重新回到二号罐3，而固相继续进沉淀罐2重新进行循环，以便进一步提高固液分离效果。Furthermore, the integrated circulation system for solid control and environmental protection of the drilling rig also includes a cyclone 9, the solid phase outlet of the No. 2 tank 3 is connected to the cyclone 9 through a sand pump, the liquid phase outlet of the cyclone 9 is connected to the No. 2 tank 3, and its solid phase outlet is connected to the sedimentation tank 2. In this way, while the above-mentioned solid-liquid separation is being carried out, the sediment in the No. 2 tank is pumped to the cyclone 9 through the sand pump, and after the cyclone separation in the cyclone 9, the liquid phase returns to the No. 2 tank 3, and the solid phase continues to enter the sedimentation tank 2 for recirculation, so as to further improve the solid-liquid separation effect.
在上述具体实施方式中，为了提高初级固液分离的效率，可以设置多级沉淀罐2，具体地，所述沉淀罐2包括并列设置的第一沉淀罐和第二沉淀罐，所述分配器10的第一出口与所述第一沉淀罐相连通，其第二出口与所述第二沉淀罐相连通；所述第一沉淀罐的出料口与所述第二沉淀罐的进料口相连通，所述沉淀罐通过分配器10与所述高架管1的出口端相连通。如图2所示，本发明所提供的沉淀罐2具有三个锥形仓体201，上半部分用挡板挡起来，在沉淀罐2的长度方向上，中间是被隔开的，也即分配器10出来的泥浆从第一沉淀罐的左边进入流到右边，流到头以后进入第二沉淀罐的左侧，再流到右边，通过两组流动循环过程实现多级沉淀，从而提高了沉淀效果和分离效率。In the above specific embodiment, in order to improve the efficiency of primary solid-liquid separation, a multi-stage sedimentation tank 2 can be set. Specifically, the sedimentation tank 2 includes a first sedimentation tank and a second sedimentation tank arranged in parallel. The first outlet of the distributor 10 is connected to the first sedimentation tank, and the second outlet is connected to the second sedimentation tank; the discharge port of the first sedimentation tank is connected to the feed port of the second sedimentation tank, and the sedimentation tank is connected to the outlet end of the elevated pipe 1 through the distributor 10. As shown in Figure 2, the sedimentation tank 2 provided by the present invention has three conical silos 201, the upper half of which is blocked by a baffle, and the middle is separated in the length direction of the sedimentation tank 2, that is, the slurry from the distributor 10 enters from the left side of the first sedimentation tank and flows to the right side, and enters the left side of the second sedimentation tank after flowing to the end, and then flows to the right side. Multi-stage sedimentation is achieved through two sets of flow circulation processes, thereby improving the sedimentation effect and separation efficiency.
理论上，也可以设置三级或者三级以上的沉淀罐2，可根据井场规模和过滤要求确定，同时，沉淀罐2的仓体也不局限于为锥形，其也可以为倒梯形结构等。Theoretically, three or more sedimentation tanks 2 can be set, which can be determined according to the well site scale and filtering requirements. At the same time, the body of the sedimentation tank 2 is not limited to a cone, and it can also be an inverted trapezoidal structure.
进一步地，本发明所提供的钻机固控环保一体化循环系统还包括用于储存钻井浆液的储浆罐11，所述储浆罐11设置于所述钻井平台上，该储浆罐11平时可以储存浆液，作为储备泥浆罐，如泥浆量过大而超过了处理系统的载荷，通过该储浆罐11时间暂存。Furthermore, the drilling rig solid control and environmental protection integrated circulation system provided by the present invention also includes a slurry storage tank 11 for storing drilling slurry. The slurry storage tank 11 is arranged on the drilling platform. The slurry storage tank 11 can store slurry at ordinary times as a reserve mud tank. If the amount of mud is too large and exceeds the load of the processing system, it will be temporarily stored in the slurry storage tank 11.
需要指出的是，文中所述“第一、第二、第三”等序数词，是为了区分相同名称的不同结构，仅为了描述方便，不表示某种顺序，更不应理解为任何限定。It should be pointed out that the ordinal numbers such as "first, second, third" mentioned in the text are to distinguish different structures with the same name. They are only for the convenience of description and do not indicate a certain order, nor should they be understood as any limitation.
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
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| CN109505544A (en) * | 2017-09-15 | 2019-03-22 | 中国石油天然气股份有限公司 | Processing device for drilling mixed fluid |
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