CN202645476U - Mud purification desander - Google Patents

Abstract

The utility model relates to a mud purifies desander contains three filter equipment, and first, second grade filter equipment comprises the whirl desander of two series connections, and it is fixed on frame upper portion, and tertiary filter equipment is the shale shaker, and it sets up in first, second grade filter equipment below, the frame lower part. The overflow pipe of the first-stage cyclone desander is communicated with the slurry inlet pipe of the second-stage cyclone desander, and the sand discharge ports of the two cyclone desanders are over against the middle part of the screen of the vibrating screen. Due to the implementation of the technical scheme, after the mud is purified by the utility model, the sand content in the mud is reduced by 70 percent, the excellent performance of the mud is ensured, the average bench-moon efficiency is improved by 21.3 percent, the drilling efficiency is improved, and the consumption of vulnerable parts (a cylinder sleeve, a piston and a valve body) of the mud pump is reduced; reduces the abrasion of a drill rod and a drilling tool, reduces the consumption of pulping materials and pulping water, reduces the cost of slurry by 42.6 percent, reduces the discharge amount of waste slurry and lightens the environmental pollution.

Description

Mud purification desander

technical field

The utility model relates to a mud purifying desander. the

Background technique

The solid phase in the mud can be divided into two types according to its function: one is useful solid phase, such as bentonite, chemical treatment agent, barite powder, etc.; the other is useless solid phase, such as drill cuttings, inferior bentonite, sand, etc. . The so-called solid phase control of drilling fluid is to eliminate harmful solid phase and preserve useful solid phase to meet the requirements of drilling technology for drilling fluid performance. At present, there are four commonly used methods to reduce the solid phase content in the mud: the first is to dilute the drilling fluid with clean water, this method only unilaterally reduces the solid phase content in the mud, and does not use the useless solid phase in the mud Completely eliminate the mud system; the second is to replace the mud in the well with clean water and new mud with qualified performance. This method not only increases the discharge of waste mud, aggravates environmental pollution, but also wastes mud materials and increases mud costs; third. The first is to use the gravity of the solid to let the solid settle and separate in the grit chamber. This method will destroy the performance of the mud; the fourth is to use the mechanical purification method. This method is more effective in removing sand than the above three methods, but due to drilling Due to the difference in technology, there are defects such as high cost, inconvenient operation, and low popularity. the

Contents of the invention

The purpose of the utility model is to propose a mud purification and desander combining cyclone separation and screen mesh separation. the

The purpose of this utility model is achieved in this way: the mud purification desander includes three filter devices, the first and second filter devices are composed of two series-connected swirl desanders, which are fixed on the upper part of the frame, and the third filter device It is a vibrating screen, which is set under the primary and secondary filter devices and the lower part of the frame. The overflow pipe of the primary cyclone desander is connected with the slurry inlet pipe of the secondary cyclone desander, and the sand discharge ports of the two cyclone desanders are facing the middle of the screen of the vibrating screen. the

Due to the implementation of the above-mentioned technical scheme, after the mud is purified by the utility model, the sand content in the mud is reduced by 70%, the excellent performance of the mud is guaranteed, the average platform efficiency is increased by 21.3%, the drilling efficiency is improved, and the drilling efficiency is reduced. Reduced the consumption of mud pump wearing parts (cylinder liner, piston, valve body); reduced the wear of drill pipes and drilling tools, reduced the consumption of pulping materials and water for pulping, and reduced the cost of mud by 42.6%. The discharge of waste pulp is reduced, and the environmental pollution is reduced. the

Description of drawings: the concrete structure of the present utility model is provided by following accompanying drawing and embodiment:

Figure 1 is a schematic diagram of the structure of the mud purification desander.

Legend: 1. Cyclone desander, 2. Frame, 3. Vibrating shaft, 4. Coarse mesh screen, 5. Fine mesh screen, 6. Diversion groove, 7. Spring, 8. Vibrating screen, 9. Motor . the

Detailed ways:

The utility model is not limited by the following examples, and the specific implementation manner can be determined according to the technical scheme of the utility model and actual conditions.

Embodiment: As shown in Figure 1, the mud purification desander includes three filter devices, the primary and secondary filter devices are composed of two series-connected cyclone desanders 1, which are fixed on the top of the frame 2, and the three-stage filter The device is a vibrating screen 8, which is arranged below the primary and secondary filter devices and the bottom of the frame 2. The overflow pipe of the primary cyclone desander communicates with the slurry inlet pipe of the secondary cyclone desander, and the sand outlets of the two cyclone desanders 1 face the middle of the screen of the vibrating screen 8 . the

The cyclone desander is an existing technology, which consists of a shell, an overflow pipe arranged at the upper end of the shell, a slurry inlet pipe connected to the circumference of the shell in a tangential direction, and a rotating device arranged in the shell. The shell is divided into an upper circular cavity and a lower conical cavity, and the lower end of the conical cavity is open, which is the sand discharge port. Any kind of cyclone desander has a certain solid separation particle size and clarity. For example, a certain cyclone desander has a separation particle size of 60 microns and a purity of 95%, which means that this cyclone desander can separate 95% of solids larger than 60 microns. In the utility model, different cyclone desanders can be selected according to specific usage requirements. the

The vibrating screen 8 is composed of a screen frame, a screen cloth arranged in the screen cloth, and a diversion groove 6 arranged under the screen cloth. A vibrating shaft 3 is crossed on the upper part of the screen frame, and a device is installed on one side of the vibrating shaft 3. A belt pulley of an eccentric block is provided, and the belt pulley is driven by a motor 9 fixed on the frame 2 . The vibrating screen 8 is seated at the base on the frame 2, and a spring 7 is connected between the four corners of the bottom of the vibrating screen 8 and the four corners of the base. At least two layers of sieves are tiled inside the vibrating sieve 8, and the mesh number of the sieves increases from top to bottom. When it is a two-layer screen, the upper layer is a coarse screen 4, and the lower layer is a fine screen 5. the

During mud purification, two series cyclone desanders 1 separate the mud into low-density overflow and high-density underflow, where the overflow is returned to the mud circulation system by the overflow pipe of the secondary cyclone desander, and the bottom flow It falls on the vibrating screen 8. Subsequently, the upper coarse-mesh screen 4 of the vibrating screen 8 separates the high-density underflow into two parts, one part is the slurry and the particles smaller than the mesh pass through the coarse-mesh screen 4 and fall to the fine-mesh screen 5; the other part is larger than the mesh. The particles are discharged from the coarse screen 4. Finally, the fine-mesh screen 5 of the lower layer of the vibrating screen 8 separates the slurry containing particles again, and the slurry and particles smaller than the mesh pass through the fine-mesh screen 5 and return to the mud circulation system through the diversion groove 6; the other part is larger than the mesh. The particles are discharged from the fine mesh screen 5 . the

The above technical features constitute the best embodiment of the utility model, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

Claims (4)

1. mud purification desander, it is characterized in that: comprise three filters, the I and II filter is comprised of the hydrocyclone of two series connection, it is fixed on upper rack, three-level filter device is vibrosieve, and it is arranged on I and II filter below, frame lower, the bleed off pipe of one-level hydrocyclone is communicated with the inlet pipe of secondary hydrocyclone, and the sand removing hole of two hydrocyclones is over against the screen cloth middle part of vibrosieve.

2. mud purification desander as claimed in claim 1, it is characterized in that: vibrosieve is by screen frame (unit), and be arranged on screen cloth in the screen frame (unit), form with the guiding gutter that is arranged under the screen cloth, crossed vibrating shaft at the screen frame (unit) internal upper part, vibrating shaft one side is provided with the belt pulley that is equiped with eccentric block, and this belt pulley is by the motor drives that is fixed on the frame, the two-layer at least screen cloth of the inner tiling of vibrosieve, from top to bottom sieve number increases progressively.

3. mud purification desander as claimed in claim 2, it is characterized in that: vibrosieve is seated at the base position on the frame, is connected with spring between four jiaos of four jiaos of vibrosieve bottoms and bases.

4. mud purification desander as claimed in claim 2 is characterized in that: the upper strata is the coarse meshed sieve net in the vibrosieve, and lower floor is the detailed catalogue screen cloth.

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