A sampling method for petroleum detection

Abstract

The present invention discloses a sampling method for oil detection, comprising the following steps: Step 1: Open the oil storage tank, place the sampling device on the tank mouth of the oil storage tank, and make several sampling tubes on the sampling device extend into the oil layers of different depths in the oil storage tank respectively; Step 2: Extract parts of the oil layers of different depths in the oil storage tank into a sampling bottle, and then seal the sampling bottle; Step 3: Send the sampled and sealed sampling bottle to a detection center for detection. The present invention can realize synchronous stratified sampling of oil layers of different depths through the sampling device, which significantly improves the sampling efficiency.

Description

Technical Field

[0001] The invention relates to a sampling method for petroleum detection, belonging to the field of petroleum detection sampling. Background Art

[0002] Petroleum is a viscous, dark brown liquid known as the "blood of industry". Petroleum is stored in some areas of the upper crust. Its main components are a mixture of various alkanes, cycloalkanes, and aromatic hydrocarbons. It is one of the main objects of geological exploration. In the process of petroleum detection, sampling devices are usually used to sample the petroleum in the oil tank.

[0003] At present, due to the deposition and suspension of impurities in the oil in the oil tank, the quality of the oil at different liquid levels is inconsistent, which leads to the need for stratified sampling. The existing stratified sampling method mainly samples the oil at different liquid levels in batches, which is very inefficient. Therefore, it is urgent to design a sampling method for oil detection to solve the above problems. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present invention provides a sampling method for petroleum detection, which can realize synchronous stratified sampling of oil layers at different depths through a sampling device, thereby significantly improving the sampling efficiency.

[0005] The technical solution adopted by the present invention is:

[0006] A sampling method for petroleum detection comprises the following steps:

[0007] Step 1: Open the oil storage tank, place the sampling device on the tank opening of the oil storage tank, and allow several sampling tubes on the sampling device to extend into the oil layers at different depths in the oil storage tank respectively;

[0008] Step 2: Extract oil layers at different depths in the oil storage tank into sampling bottles, and then seal the sampling bottles;

[0009] Step 3: Send the sealed sampling bottle to the testing center for testing;

[0010] The sampling device described in step 1 is composed of a plurality of sampling mechanisms welded along a certain clockwise direction, the sampling mechanism comprises a hollow annular cylinder section with both ends being closed and in an arc-shaped structure, the annular cylinder sections of the plurality of sampling mechanisms are welded around to form a sampling annular cylinder of annular structure, an arc-shaped slide groove is provided on the top of one end of the annular cylinder section, an arc-shaped connecting rod with one end extending to the inside of the annular cylinder section below the arc-shaped slide groove is provided in the other end of the annular cylinder section, a piston is provided at the end of the annular connecting rod away from the slide groove, which is in contact with the inner wall of the annular cylinder section and is relatively slidable, and a rotating rod extending to the top of the arc-shaped slide groove is provided vertically upward at the other end of the arc-shaped connecting rod;

[0011] An upper liquid pipe is arranged at the bottom of one end of the annular tube section away from the chute, and a lower liquid pipe is arranged at the bottom of the annular tube section between the upper liquid pipe and the chute. A sampling bottle is screwed onto the bottom end of the lower liquid pipe, and sampling tubes of different lengths are screwed onto the bottom end of the upper liquid pipe of each sampling mechanism.

[0012] As a preferred embodiment of the present invention, a rotating disk is arranged on the top of the rotating rod of the sampling mechanism.

[0013] As a preferred embodiment of the present invention, an annular fixing ring is arranged on the outer edge of the sampling ring tube, and a plurality of supporting feet are evenly arranged on the bottom of the fixing ring.

[0014] As a preferred embodiment of the present invention, a sleeve for covering a sampling ring is provided on the top of the turntable, a top plate is provided on the top of the sleeve, a rotating shaft is provided vertically downward and rotatably at the center of the top plate, the bottom end of the rotating shaft is fixedly connected to the center point of the turntable, a connecting rod is provided on one side of the top end of the rotating shaft, and a handle is provided on the top end of the connecting rod.

[0015] As a preferred embodiment of the present invention, a valve is provided on the pipe body of the lower liquid pipe.

[0016] As a preferred embodiment of the present invention, the length of the arc-shaped connecting rod is greater than the length of the arc-shaped sliding groove.

[0017] As a preferred embodiment of the present invention, a guide block is fixedly provided in the annular cylinder section away from the arcuate chute, the guide block is located between the downpipe and the arcuate chute, and the rod body of the arcuate connecting rod passes through the guide block and is slidably connected to the guide block.

[0018] The beneficial effects of the present invention are:

[0019] The turntable is driven to rotate in a certain direction by turning the handle, and then the arc-shaped connecting rod is driven to rotate synchronously through the rotating rod. When the arc-shaped connecting rod rotates, it will drive the piston to move, and then the oil samples of different oil layers can be extracted into the sampling ring cylinder through the sampling tube and the upper liquid tube, so that they can flow into the sampling bottle, and then the synchronous sampling of oil in different oil layers is realized, which significantly improves the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 This is a top view of the sampling ring;

[0022] Figure 3 It is a structural diagram of the sampling mechanism;

[0023] The main reference numerals in the figure have the following meanings:

[0024] 1. Sampling ring tube, 2. Arc-shaped connecting rod, 3. Piston, 4. Rotating rod, 5. Upper liquid pipe, 6. Lower liquid pipe, 7. Sampling bottle, 8. Sampling tube, 9. Turntable, 10. Fixed ring, 11. Ring tube section, 12. Arc-shaped slide groove, 13. Top plate, 14. Rotating shaft, 15. Connecting rod, 16. Handle, 17. Valve, 18. Support foot, 19. Sleeve, 20. Guide block. DETAILED DESCRIPTION

[0025] The present invention will be specifically described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1-3 As shown: This embodiment is a sampling method for petroleum detection, comprising the following steps:

[0027] Step 1: Open the oil storage tank, place the sampling device on the tank opening of the oil storage tank, and allow several sampling tubes on the sampling device to extend into the oil layers at different depths in the oil storage tank respectively;

[0028] Step 2: Extract oil layers at different depths in the oil storage tank into sampling bottles, and then seal the sampling bottles;

[0029] Step 3: Send the sealed sampling bottle to the testing center for testing;

[0030] Among them, the sampling device in step one is composed of four sampling mechanisms welded along a certain clockwise direction, the sampling mechanism includes a hollow annular tube section 11 with closed two ends and an arc-shaped structure, the annular tube sections 11 of the four sampling mechanisms are welded around to form a sampling annular tube 1 with a circular ring structure, an arc-shaped slide groove 12 is opened on the top of one end of the annular tube section 11, and an arc-shaped connecting rod 2 with one end extending to the bottom of the arc-shaped slide groove 12 is arranged in the other end of the annular tube section 11, and a piston 3 is arranged at one end of the arc-shaped connecting rod 2 away from the slide groove 12, which is in contact with the inner wall of the annular tube section 11 and slides relatively, and the piston 3 is made of rubber material and its structure is adapted to the inner wall of the annular tube section 11, and a rotating rod 4 extending to the top of the arc-shaped slide groove 12 is arranged vertically upward at the other end of the arc-shaped connecting rod 2;

[0031] An upper liquid pipe 5 is arranged at the bottom of one end of the annular tube section 11 away from the chute 12, and a lower liquid pipe 6 is arranged at the bottom of the annular tube section 11 between the upper liquid pipe 5 and the chute 12. A sampling bottle 7 is screwed on the bottom end of the lower liquid pipe 6, and sampling tubes 8 of different lengths are screwed on the bottom end of the upper liquid pipe 5 of each sampling mechanism.

[0032] See also Figure 1As shown, in order to improve the sampling efficiency, a turntable 9 is provided on the top of the rotating rod 4 of the sampling mechanism. By rotating the turntable 9, the rotating rods 4 on the four sampling mechanisms are driven to move synchronously, so as to drive the arc-shaped connecting rod 2 in the sampling mechanism to move, and then the piston 3 can move in the annular tube section 11, so that the oil from different oil layers can be drawn into the annular tube section 11 through the sampling tube 8 and the upper liquid tube 5 and can flow into the sampling bottle 7.

[0033] In order to facilitate the placement of the sampling device and observe the progress of sample sampling, an annular fixing ring 10 is arranged on the outer edge of the sampling ring tube 1, and a plurality of supporting legs 18 are evenly arranged on the bottom of the fixing ring 10. The sampling device is set above the oil storage tank through the plurality of supporting legs 18, and the sampling bottle 7 is located within the observable field of view.

[0034] In order to further facilitate the rotation of the turntable 9 and improve the aesthetics, a sleeve 19 for covering the sampling ring tube 1 is provided on the top of the turntable 9, and a top plate 13 is provided on the top of the sleeve 19. A rotating shaft 14 is vertically downward and rotatably provided at the center of the top plate 13. The bottom end of the rotating shaft 14 is fixedly connected to the center point of the turntable 9, and a connecting rod 15 is provided on one side of the top end of the rotating shaft 14. A handle 16 is provided on the top end of the connecting rod 15. The turntable 9 is driven to rotate by rotating the handle 16 to achieve sampling of petroleum in different oil layers.

[0035] See also Figure 1 As shown, a valve 17 is provided on the tube body of the lower liquid pipe 6. When sampling is performed, the valve 17 is opened. After the sampling is completed, the valve 17 is closed, and then the sampling bottle 7 is unscrewed. In order to facilitate the distinction of oil samples from different oil layers in the sampling bottle 7, the sampling bottles 7 can be numbered according to the sampling tubes 8 of different lengths, and the numbers can be written on label paper and attached to the sampling bottle 7.

[0036] In this embodiment, the length of the arc-shaped connecting rod 2 is greater than the length of the arc-shaped sliding groove 12 .

[0037] See also Figure 2 As shown, a guide block 20 is fixedly provided in the annular cylinder section 11 away from the arcuate chute 12. The guide block 20 is located between the downpipe 6 and the arcuate chute 12, and the rod body of the arcuate connecting rod 2 passes through the guide block 20 and is slidably connected to the guide block 20. By providing the guide block 20, the stability of sampling can be improved, and the sealing effect can be improved, so that the oil in different oil layers can be more conveniently extracted.

[0038] After sampling, the sampling mechanism needs to be cleaned. At this time, the flushing pipes of the flushing liquid are connected to the lower liquid pipe 6 respectively, and then the valve 17 is opened. The cleaning liquid is pumped into the annular tube section 11 through the flushing pipe by an external machine pump, and the flushing liquid after flushing is discharged through the sampling tube 8. In this way, the entire sampling device can be cleaned at the same time, avoiding the tediousness of flushing after a single sampling and then the next sampling; after flushing, close the valve 17, and then unscrew the sampling tube 8.

[0039] The above is only a preferred implementation of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. A sampling method for petroleum detection, characterized in that: The steps include: Step 1: Open the oil storage tank, place the sampling device on the tank opening of the oil storage tank, and allow several sampling tubes on the sampling device to extend into the oil layers at different depths in the oil storage tank respectively; Step 2: Extract oil layers at different depths in the oil storage tank into sampling bottles, and then seal the sampling bottles; Step 3: Send the sealed sampling bottle to the testing center for testing; The sampling device in step 1 is composed of a plurality of sampling mechanisms welded in a clockwise direction, the sampling mechanism comprising a hollow annular tube section (11) with both ends closed and in an arc-shaped structure, the annular tube sections (11) of the plurality of sampling mechanisms are welded around to form a sampling annular tube (1) with an annular structure, the top of one end of the annular tube section (11) is provided with an arc-shaped slide groove (12), the other end of the annular tube section (11) is provided with an arc-shaped connecting rod (2) in the annular tube section (11) with one end extending to below the arc-shaped slide groove (12), the end of the arc-shaped connecting rod (2) away from the slide groove (12) is provided with a piston (3) which is in contact with and relatively slidably arranged with the inner wall of the annular tube section (11), and the other end of the arc-shaped connecting rod (2) is provided with a rotating rod (4) extending to above the arc-shaped slide groove (12) vertically upward; An upper liquid pipe (5) is arranged at the bottom of one end of the annular tube section (11) away from the chute (12), and a lower liquid pipe (6) is arranged at the bottom of the annular tube section (11) between the upper liquid pipe (5) and the chute (12). A sampling bottle (7) is screwed onto the bottom end of the lower liquid pipe (6), and sampling tubes (8) of different lengths are screwed onto the bottom end of the upper liquid pipe (5) of each sampling mechanism.

2. A petroleum sampling method according to claim 1, characterized in that: A rotating disk (9) is arranged on the top of the rotating rod (4) of the sampling mechanism.

3. A sampling method for petroleum detection according to claim 2, characterized in that: An annular fixing ring (10) is arranged on the outer edge of the sampling ring tube (1), and a plurality of supporting feet (18) are evenly arranged on the bottom of the fixing ring (10).

4. A petroleum testing sampling method according to claim 2, characterized in that: A sleeve (19) for covering the sampling ring (1) is arranged on the top of the turntable (9), a top plate (13) is arranged on the top of the sleeve (19), a rotating shaft (14) is arranged vertically downward and rotatably at the center of the top plate (13), the bottom end of the rotating shaft (14) is fixedly connected to the center point of the turntable (9), a connecting rod (15) is arranged on one side of the top end of the rotating shaft (14), and a handle (16) is arranged at the top end of the connecting rod (15).

5. A sampling method for petroleum detection according to claim 1, characterized in that: A valve (17) is provided on the pipe body of the lower liquid pipe (6).

6. A sampling method for petroleum detection according to claim 1, characterized in that: The length of the arc-shaped connecting rod (2) is greater than the length of the arc-shaped sliding groove (12).

7. A petroleum testing sampling method according to claim 1, characterized in that: A guide block (20) is also fixedly arranged in the annular cylinder section (11) away from the arc-shaped slide groove (12); the guide block (20) is located between the lower liquid pipe (6) and the arc-shaped slide groove (12); and the rod body of the arc-shaped connecting rod (2) passes through the guide block (20) and is slidably connected to the guide block (20).

Images