Tool for separating drilling fluid in oil-based rock debris and using method of tool

Abstract

The invention discloses equipment for separating drilling fluid in oil-based rock debris and a using method of the equipment. The device comprises a main body frame, and the interior of the main body frame is divided into a rock debris treatment bin and a fluid collection bin through a partition plate; a compression device for compressing rock debris is arranged in the rock debris treatment bin; multiple rows of flow guide holes are formed in the partition plate; after rock debris to be treated enters the rock debris treatment bin, fluid is separated out under the action of the compression device, and the fluid enters the fluid collection bin through the flow guide hole. The tool has the advantages that the tool is simple in overall structure, few in working steps, high in rock debris treatment efficiency and low in cost; gas is input for secondary pressure application on the basis of physical compression, so that fluid in rock debris is further separated out, and the separation effect is improved; the rock debris treatment bin is opened or sealed through the cover plate and the bottom plate which can move in a reciprocating mode, meanwhile, the compression device serves as one of the wall faces of the rock debris treatment bin, convenience and rapidness are achieved, and the space utilization rate is high.

Description

Technical Field

[0001] The invention relates to a drilling fluid related technology, in particular to a drilling fluid separation tool in oil-based rock cuttings and a use method thereof. Background Art

[0002] Oil-based drilling fluid is a drilling fluid system with oil as the continuous phase. Compared with water-based drilling fluid, oil-based drilling fluid has the advantages of high temperature resistance, salt-calcium corrosion resistance, good well wall stability, good lubricity, and little damage to oil and gas layers. At present, oil-based drilling fluid has developed into an important product in the drilling process of shale oil and gas wells, high-temperature wells, deep wells, etc. However, in the process of using oil-based drilling fluid, a large amount of hazardous waste containing oil-based drilling fluid - oil-based cuttings will be generated. The output of oil-based cuttings is large and the processing cost is high.

[0003] There are two main methods for enterprises to deal with oil-based cuttings: the first is to collect and directly transfer them to manufacturers with hazardous waste treatment qualifications for disposal, but this will cause waste of drilling fluid in the oil-based cuttings; the second is to analyze the liquid in the collected oil-based cuttings through heat treatment, but it can only separate the liquid phase and cannot separate most of the treatment agents in the drilling fluid. Both methods are costly and cannot effectively reuse the drilling fluid. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a drilling fluid separation tool in oil-based cuttings with low cost and good separation effect and a use method thereof.

[0005] In order to solve the above technical problems, the drilling fluid separation tool in oil-based cuttings of the present invention includes a main frame, and a cuttings processing chamber and a fluid collection chamber are separated inside the main frame by a partition; a compression device for compressing cuttings is provided in the cuttings processing chamber; and multiple rows of diversion holes are provided on the partition.

[0006] The main frame is provided with a cover plate and a bottom plate which can reciprocate between the cuttings processing bin and the fluid collecting bin and are used to open or seal the cuttings processing bin, and is provided with a cover plate slide groove matching the cover plate and a bottom plate slide groove matching the bottom plate.

[0007] The compression device comprises a compression plate which serves as a wall of the cuttings processing chamber and can translate therein, a telescopic rod arranged outside the compression plate for driving its translation, and a gas delivery pipe for inputting pressurized gas into the telescopic cuttings processing chamber.

[0008] The compression plate is provided with a protrusion, and the main frame is provided with a protrusion slide groove matching the protrusion.

[0009] The fluid collecting bin is provided with a discharge port.

[0010] A method for using a drilling fluid separation device in oil-based cuttings comprises the following steps: A. moving the bottom plate to one side of the cuttings processing bin, adding the oil-based cuttings to be processed into the cuttings processing bin, and moving the cover plate to one side of the cuttings processing bin to seal it; B. The compression plate is driven by the telescopic rod to compress the rock cuttings, and pressurized gas is input into the rock cutting processing chamber through the gas delivery pipe to further precipitate the fluid in the rock cuttings and enter the fluid collection chamber through the guide hole; C. Drive the compression plate back to its original position by the telescopic rod, move the cover plate and the bottom plate to one side of the fluid collection bin, discharge the processed rock debris, then open the discharge port to collect the analyzed fluid, and close it after the collection is completed; D. Repeat the above steps to process multiple batches of cuttings.

[0011] The advantages of the present invention are: the overall structure of the tool is simple, the working steps are few, so that the rock cuttings processing efficiency is high and the cost is low; on the basis of physical compression, gas is input for secondary pressure application, so that the fluid in the rock cuttings is further precipitated, thereby improving the separation effect; the rock cuttings processing chamber is opened or sealed by a reciprocating cover plate and a bottom plate, and the compression device is used as one of the wall surfaces of the rock cuttings processing chamber, which is convenient and fast and has a high space utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a half-section view of the present invention. DETAILED DESCRIPTION

[0013] The drilling fluid separation tool in oil-based rock cuttings and the use method thereof are further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] As shown in the figure, the drilling fluid separation tool in oil-based rock cuttings of the present invention includes a main frame, and a rock cutting processing chamber 2 and a fluid collecting chamber 3 are separated from the main frame by a partition 1; a compression device for compressing rock cuttings is provided in the rock cutting processing chamber 2; a plurality of rows of guide holes 4 are provided on the partition 1 for ensuring that only fluid in the rock cutting processing chamber 2 can flow into the fluid collecting chamber 3; a discharge port 14 for transferring the fluid collected in the fluid collecting chamber 3 is provided at the bottom of the side of the fluid collecting chamber 3.

[0015] The main frame is provided with a cover plate 5 and a bottom plate 6 which can reciprocate between the cuttings processing bin 2 and the fluid collecting bin 3 and are used to open or seal the cuttings processing bin 2, and is provided with a cover plate slide groove 7 matching the cover plate 5 and a bottom plate slide groove 8 matching the bottom plate 6. The cover plate 5 and the bottom plate 6 translate in the main frame through the cover plate slide groove 7 and the bottom plate slide groove 8 respectively.

[0016] The compression device includes a compression plate 9 which serves as a wall of the cuttings processing bin 2 and can translate therein, a telescopic rod 10 arranged on the outside of the compression plate 9 for driving its translation, and a gas delivery pipe 11 for inputting pressurized gas into the telescopic cuttings processing bin 2; a protrusion 12 is arranged in the middle of the side of the compression plate 9, and a protrusion groove 13 matching the protrusion 12 is opened on the main frame, and the compression device translates in the cuttings processing bin 2 through the cooperation of the protrusion 12 and the protrusion groove 13.

[0017] Before work, the cover plate 5 and the bottom plate 6 are by default located on one side of the fluid collection bin 3, and the discharge port 14 is by default in a closed state. During work, first move the bottom plate 6 to one side of the cuttings processing bin 2, and after adding the oil-based cuttings to be processed into the cuttings processing bin 2, move the cover plate 5 to one side of the cuttings processing bin 2 to seal it; then drive the compression plate 9 to compress the cuttings through the telescopic rod 10, and then input pressurized gas into the cuttings processing bin 2 through the gas delivery pipe 11 to further precipitate the fluid in the cuttings and enter the fluid collection bin 3 through the guide hole 4; after the compression and precipitation process is completed, drive the compression plate 9 back to its original position through the telescopic rod 10, move the cover plate 5 and the bottom plate 6 to one side of the fluid collection bin 3, discharge the processed cuttings, open the discharge port 14 to collect the analyzed fluid, and close the discharge port 14 after the collection is completed. If multiple batches of cuttings need to be processed, repeat the above steps to achieve it.

[0018] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A drilling fluid separation device for oil-based cuttings, characterized in that: It comprises a main frame, wherein a rock cuttings processing chamber (2) and a fluid collecting chamber (3) are separated inside the main frame by a partition (1); a compression device for compressing rock cuttings is provided in the rock cuttings processing chamber (2); and a plurality of rows of guide holes (4) are provided on the partition (1).

2. The drilling fluid separation device in oil-based cuttings according to claim 1, characterized in that: The main frame is provided with a cover plate (5) and a bottom plate (6) which are capable of reciprocating between the cuttings processing bin (2) and the fluid collecting bin (3) and are used to open or seal the cuttings processing bin (2), and is provided with a cover plate slide groove (7) matching the cover plate (5) and a bottom plate slide groove (8) matching the bottom plate (6).

3. The drilling fluid separation device in oil-based rock cuttings according to claim 1 or 2, characterized in that: The compression device comprises a compression plate (9) which serves as a wall surface of the cuttings processing chamber (2) and is capable of translationally moving therein, a telescopic rod (10) arranged outside the compression plate (9) for driving the translation thereof, and a gas delivery pipe (11) for inputting pressurized gas into the telescopic cuttings processing chamber (2).

4. The drilling fluid separation device in oil-based rock cuttings according to claim 3, characterized in that: The compression plate (9) is provided with a protrusion (12), and the main frame is provided with a protrusion slide groove (13) matching the protrusion (12).

5. The drilling fluid separation device in oil-based rock cuttings according to claim 1, characterized in that: The fluid collection bin (3) is provided with a discharge port (14).

6. A method for using the drilling fluid separation device in oil-based cuttings according to claims 1-5, characterized in that: The following steps are involved: A. moving the bottom plate (6) to one side of the rock cuttings processing bin (2), adding the oil-based rock cuttings to be processed into the rock cuttings processing bin (2), and moving the cover plate (5) to one side of the rock cuttings processing bin (2) to seal it; B. driving the compression plate (9) to compress the rock cuttings through the telescopic rod (10), and inputting pressurized gas into the rock cutting processing chamber (2) through the gas delivery pipe (11) so that the fluid in the rock cuttings is further precipitated and enters the fluid collection chamber (3) through the guide hole (4); C. driving the compression plate (9) back to its original position by means of the telescopic rod (10), moving the cover plate (5) and the bottom plate (6) to one side of the fluid collection bin (3), discharging the processed rock debris, and then opening the discharge port (14) to collect the analyzed fluid, and closing the discharge port after the collection is completed; D. Repeat the above steps to process multiple batches of cuttings.

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