Drilling fluid solid phase collection and deliquescence device

Abstract

The present invention provides a drilling fluid solid phase collection and deliquidation device, comprising a tank body, a partition, a pump, and a bottom plate. The partition divides the tank body into a liquid phase collection chamber and a solid phase sedimentation chamber, and a pump is provided in the liquid phase collection chamber; the partition is a partition with holes; a bottom plate is also provided at the bottom of the tank body, and the bottom plate has a certain inclination angle with the horizontal ground, and the bottom of the solid phase sedimentation chamber is higher than the liquid phase collection chamber. The partition is a wire mesh partition with holes, and the upper end of the partition is flush with the tank body or higher than the tank body. The advantage is that the liquid-containing solid phase can be naturally settled, filtered and deliquidated, which solves the problem that the solid phase discharged by the solid control equipment during drilling has a high water content, and the solid phase cannot be transported in the case of slurry leakage or rainy weather, and can be applied to various natural filtration and deliquidation treatment fields.

Description

Technical Field

[0001] The invention relates to the field of solid phase processing devices for petroleum drilling fluid, in particular to a device suitable for collecting, settling and deliquifying solid phases after being processed by a solid control system. Background Art

[0002] In the past, a large amount of solids generated during the drilling process were directly discharged into a large sedimentation tank, which posed a risk of environmental pollution. As environmental protection requirements become increasingly stringent, in order to eliminate the environmental pollution risks of large sedimentation tanks and achieve the goal of reducing waste during the drilling process, it is now required that large sedimentation tanks no longer be dug during the drilling process. A solid phase collection device is needed to collect the solids treated by the well team's solid control system or other solid-liquid separation equipment during the drilling process so that they can be transported to a designated location. In particular, if the solid phase discharged into the device has a high water content or encounters slurry leakage or rainy weather, the device is required to be able to further naturally settle and separate the solids and liquids for transportation.

[0003] The technical scheme published in the invention patent with the invention name of “A device for treating drill cuttings and waste drilling fluid in the whole well section without falling to the ground” and the application number of “201620033170.4” and the technical scheme published in the invention patent with the invention name of “A device for rapid sedimentation of drill cuttings” and the application number of “201620033169.1” both use a rapid sedimentation device to achieve rapid sedimentation and solid-liquid separation treatment of the solid-liquid mixture produced in the rapid drilling stage of clear water in the upper formation. The material treated by this device is a flowing solid-liquid mixture, and the solid phase sedimentation and deliquidation treatment mentioned in the present invention cannot be carried out. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned technical problems existing in solid phase collection and dehydration in the existing oil drilling process, and to provide a drilling fluid solid phase collection and dehydration device to collect, settle and dehydrate the solid phase separated by the well team solid control system.

[0005] To solve the above problems, the technical solution of the present invention is:

[0006] A drilling fluid solid phase collection and deliquescence device comprises a tank body, a partition, a pump and a bottom plate. The partition divides the tank body into a liquid phase collection chamber and a solid phase sedimentation chamber. A pump is arranged in the liquid phase collection chamber. The partition is a partition with holes. A bottom plate is also arranged at the bottom of the tank body. The bottom plate has a certain inclination angle with the horizontal ground. The bottom of the solid phase sedimentation chamber is higher than the liquid phase collection chamber.

[0007] The apertures of the holes on the partition gradually decrease from top to bottom, the upper end of the partition is flush with or higher than the tank body, and the volume of the solid phase sedimentation chamber is greater than the volume of the liquid phase collection chamber.

[0008] The bottom plate has a certain inclination angle with the horizontal ground to ensure that the liquid-containing solid phase in the solid phase sedimentation tank naturally settles, separates the solid and liquid, and is compacted under the action of gravity. The liquid therein is squeezed and seeps out, and naturally flows to the liquid phase collection tank through the holes on the partition along the inclination angle, thereby realizing the solid-liquid separation and concentration and deliquidation of the liquid-containing solid phase. The liquid phase in the liquid phase collection tank is pumped out to the well team's solid control system for recycling.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. It can naturally settle, filter and deliquate the liquid-containing solid phase, thus solving the problem of high water content in the solid phase discharged by the solid control equipment during drilling, or the inability of the solid phase to be transported in the case of slurry leakage or rainy weather; 2. It has a simple structure, good equipment reliability and low manufacturing cost; 3. It can be applied to other fields that require natural filtration and deliquification of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a top view of the drilling fluid solid phase collection and deliquidation device of the present invention;

[0012] Figure 2 for Figure 1 Section view along section AA;

[0013] Figure 3 for Figure 1 Cross-sectional view along section BB.

[0014] Figure numerals: 1. tank body, 2. liquid phase collecting chamber, 3. solid phase settling chamber, 4. partition, 5. pump, 6-bottom plate. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] See also Figure 1 , Figure 2 , Figure 3 A drilling fluid solid phase collection and deliquescence device comprises a tank body 1, a liquid phase collection chamber 2, a solid phase sedimentation chamber 3, a partition 4, a pump 5, and a bottom plate 6. The partition 4 divides the tank body 1 into a liquid phase collection chamber 2 and a solid phase sedimentation chamber 3, and a pump 5 is arranged in the liquid phase collection chamber 2.

[0017] The partition 4 is a wire mesh partition with holes; the bottom plate 6 has a certain inclination angle (5-15 degrees) with the horizontal ground, and the bottom of the solid phase sedimentation chamber 3 is higher than the bottom of the liquid phase collection chamber 2.

[0018] Its working principle is: the solid-liquid mixture returned from the bottom of the well is directly discharged into the solid phase sedimentation chamber 3 of the tank body 1 after being separated by the well team solid control system or other solid-liquid separation equipment. Under the action of gravity, the solid phase naturally settles and compacts, and the liquid therein is squeezed and penetrated out, and flows into the liquid phase collection chamber 2 through the holes on the partition 4 along the inclined direction of the bottom plate 6. The pump 5 transports the liquid in the liquid phase collection chamber 2 to the well team solid control system for recycling.

[0019] Its advantages are: it can collect the solid phase processed by the well team and carry out natural sedimentation, filtration, dehydration and compaction, further reduce the water content of the solid phase, and solve the problem of high water content in the solid phase discharged by the solid control equipment during drilling, and the solid phase cannot meet the transportation requirements under the conditions of slurry leakage or rainy weather; at the same time, it can collect the drilling fluid and return it to the well team's solid control system for recycling; it has a simple structure, good equipment reliability and low manufacturing cost; it can be applied to other fields that require natural sedimentation, filtration and dehydration of materials.

Claims

1. A drilling fluid solid phase collection and deliquescence device, comprising a tank (1), a partition (4) and a pump (5), Features: The partition (4) divides the tank body (1) into a liquid phase collection chamber (2) and a solid phase sedimentation chamber (3), and the pump (5) is arranged in the liquid phase collection chamber (2); the partition (4) is a partition with holes; a bottom plate (6) is also arranged at the bottom of the tank body (1), the bottom plate (6) is inclined at an angle to the horizontal ground, and the bottom of the solid phase sedimentation chamber (3) is higher than the liquid phase collection chamber (2).

2. A drilling fluid solid phase collection and deliquescence device according to claim 1, Features: The diameters of the holes on the partition (4) gradually decrease from top to bottom.

3. A drilling fluid solid phase collection and deliquescence device according to claim 1 or 2, Features: The upper end of the partition (4) is flush with or lower than the upper end of the tank body (1), and the volume of the solid phase sedimentation chamber (3) is greater than the volume of the liquid phase collection chamber (2).

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