A formation fluid sampling probe filter while drilling

Abstract

The present invention relates to a filter for a formation fluid sampling probe while drilling, comprising a main body housing; a filtering component is arranged at the lower end of the main body housing, an anti-blocking component is arranged on the outer side of the filtering component, a sampling component is arranged inside the main body housing, the sampling component comprises a mounting block, the upper end of the main body housing is provided with the mounting block through a mounting mechanism, and a heat preservation storage tank is fixedly installed inside the mounting block; by arranging the filtering component and the anti-blocking component, the fluid can be filtered at the position where sampling is required through the filtering component, so as to avoid the fluid in other areas entering the main body housing when the main body housing moves, resulting in the mixing of fluids at different depths. The anti-blocking component can remove the sand and stones at the filtering holes, thereby preventing blockage and affecting the filtering efficiency, and improving the filtering efficiency of the filter.

Description

Technical Field

[0001] The present invention relates to the technical field of formation fluid sampling in oil and gas drilling, and particularly relates to a filter for a formation fluid sampling probe while drilling. Background Art

[0002] The physical properties of formation fluids vary greatly due to different geological conditions. Properties such as the chemical composition, viscosity, gas phase envelope, and solid phase envelope of formation reservoirs have a great impact on the physical property evaluation of reservoirs. In addition, these characteristics also determine whether an oilfield can be effectively developed, as well as the duration, cost, and unit price of production. For these reasons, accurate measurement of reservoir fluid properties is extremely important, among which the preservation of the in-situ phase state of the sample is the most important. Formation fluid sampling while drilling is that the sampler is lowered into the wellbore through a drilling tool and the original formation fluid is obtained by negative pressure suction from the exposed wellbore wall. When extracting fluid samples, usually the fluid contains sand and gravel, which can cause the sampler to become blocked or even damaged. When the sand and gravel content in the fluid is large, it is easy to cause the filter to become blocked, thus a filter for a formation fluid sampling probe while drilling is needed. Summary of the Invention

[0003] The purpose of the present invention is to provide a filter for a formation fluid sampling probe while drilling in view of the above problems.

[0004] The technical solution for the present invention to solve the above technical problems is as follows: A filter for a formation fluid sampling probe while drilling includes a main body housing; a filtering component is arranged at the lower end of the main body housing, an anti-blocking component is arranged outside the filtering component, a sampling component is arranged inside the main body housing, the sampling component includes a mounting block, the upper end of the main body housing is provided with the mounting block through a mounting mechanism, a heat preservation storage tank is fixedly installed inside the mounting block, a solenoid valve is fixedly installed at the lower end of the heat preservation storage tank, a pipeline is fixedly installed at the lower end of the solenoid valve, the upper and lower ends inside the main body housing are respectively fixedly connected with a first partition plate and a second partition plate, the upper and lower ends of the pipeline are respectively inserted through the first partition plate and the second partition plate, and a cable is fixedly installed at the upper end of the mounting block.

[0005] The beneficial effects of the present invention are as follows:

[0006] By providing a filtering component and an anti-blocking component, the fluid can be filtered at the position where sampling is required through the filtering component, avoiding the fluid in other areas entering the main body housing when the main body housing moves, resulting in the mixing of fluids at different depths. The anti-blocking component can remove the sand and gravel at the filtering holes, thus preventing blockage and affecting the filtering efficiency, and improving the filtering efficiency of the filter.

[0007] By providing an installation component, the sampler can be quickly installed inside the main body housing through the installation component, and the main body housing can also be quickly separated from the sampler, facilitating separate cleaning of the main body housing and the sampler.

[0008] Furthermore, the filtering component includes baffles. Baffles are slidably connected to both the left and right sides of the inner wall at the lower end of the main body housing. An installation plate is fixedly connected to the upper end of the baffle. The installation plate is located between the first partition plate and the second partition plate. A middle part of the upper surface of the installation plate is fixedly installed with an electric push rod. The upper end of the electric push rod is fixedly installed at the middle part of the lower surface of the first partition plate. Filter nets are fixedly connected to both the left and right sides of the lower end of the main body housing at the positions of the baffles.

[0009] The beneficial effect of the above further solution is that when the main body housing moves to the fluid layer where sampling is required, by controlling the electric push rod to contract, the installation plate drives the baffle to move upward, enabling the external fluid to enter the main body housing through the filter net and filtering the sand and stones in the fluid outside the main body housing. At this time, the fluid inside the main body housing can be pumped for sampling.

[0010] Furthermore, a pressing plate is fixedly connected to the lower end of the baffle. The lower surface of the pressing plate is flush with the lowermost end of the filter net.

[0011] The beneficial effect of the above further solution is that after sampling in this fluid layer is completed, control the electric push rod to extend, so that the pressing plate moves downward to squeeze out the remaining fluid inside the main body housing through the filter net, thereby preventing the remaining fluid inside the main body housing from mixing with the fluid of the next sampling fluid layer.

[0012] Furthermore, the anti-blocking component includes a first annular plate. The lower end of the main body housing is rotatably connected to the first annular plate. A tooth groove is provided inside the first annular plate. A motor is fixedly installed on the front side of the lower end of the main body housing. A gear is fixedly installed on the output shaft of the motor. The gear meshes with the tooth groove. A scraping plate is fixedly connected to the lower surface of the first annular plate. A second annular plate is fixedly connected to the lower end of the scraping plate. The second annular plate is rotatably connected to the main body housing.

[0013] The beneficial effect of the above further solution is that by controlling the motor to operate, the gear rotates, and then the first annular plate can be driven to rotate, enabling the scraping plate to remove the sand and stones attached to the surface of the filter net, thereby preventing the filter net from being blocked and improving the filtering efficiency.

[0014] Further, the installation mechanism includes a sliding groove. A sliding groove is formed in the middle of the installation block. A slider is slidably connected in the sliding groove. A spring is arranged in the sliding groove. Two ends of the spring are respectively fixedly connected with the inner wall of the sliding groove and the slider. One side of the slider away from the middle of the installation block is fixedly connected with a fixed insertion rod. The fixed insertion rod penetrates through the installation block and extends to the outside of the installation block. One end of the fixed insertion rod located outside the installation block is inserted into the upper end of the main body housing. A jack matching the fixed insertion rod is formed in the upper end of the main body housing. The upper end of the slider is fixedly connected with a pulling block.

[0015] The beneficial effect of the above further solution is that by pulling the pulling block inward, the fixed insertion rod is withdrawn from the jack. At this time, the sampling assembly can be removed from the main body housing, which is convenient for cleaning the main body housing and the sampling assembly.

[0016] Further, the lower end of the main body housing is threadedly connected with a bottom plate. The upper surface of the bottom plate is mutually attached to the lower side surface of the extrusion plate.

[0017] The beneficial effect of the above further solution is that after the sampling is completed and the main body housing is taken out of the ground, the bottom plate can be removed from the main body housing, and the solenoid valve is controlled to open, so that the sample in the heat preservation storage tank can be quickly taken out.

[0018] Further, a heat preservation and heat insulation layer is adhered to the inner wall of the upper end of the main body housing. The heat preservation and heat insulation layer is made of silica aerogel.

[0019] The beneficial effect of the above further solution is that the heat preservation storage tank is heat-preserved and heat-insulated through the heat preservation and heat insulation layer, so that the sample in the heat preservation storage tank is as close as possible to the state when it is in the fluid layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 is a front sectional structural schematic diagram of the present invention;

[0022] Figure 3 is of the present invention Figure 2 a magnified structural schematic diagram of part A in;

[0023] Figure 4 is a three-dimensional structural schematic diagram of the filtering assembly and the sampling assembly of the present invention;

[0024] Figure 5 is a three-dimensional structural schematic diagram of the main body housing, the filter screen and the jack of the present invention;

[0025] Figure 6 is a three-dimensional structural schematic diagram of the anti-blocking assembly of the present invention.

[0026] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0027] 1. Main body housing; 111. First partition board; 112. Second partition board; 211. Baffle; 212. Mounting plate; 213. Electric push rod; 214. Filter net; 215. Extrusion plate; 311. First annular plate; 312. Tooth groove; 313. Motor; 314. Gear; 315. Scraper; 316. Second annular plate; 411. Mounting block; 412. Heat preservation storage tank; 413. Solenoid valve; 414. Pipeline; 415. Cable rope; 511. Slide groove; 512. Slide block; 513. Spring; 514. Fixed insertion rod; 515. Insertion hole; 516. Pulling block; 6. Bottom plate; 7. Heat preservation and insulation layer. Detailed implementation manners

[0028] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0029] Embodiment 1

[0030] As shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 , a filter for a formation fluid sampling probe while drilling includes a main body housing 1; a filtering assembly is arranged at the lower end of the main body housing 1, an anti-blocking assembly is arranged outside the filtering assembly, a sampling assembly is arranged inside the main body housing 1, the sampling assembly includes a mounting block 411, the mounting block 411 is arranged at the upper end of the main body housing 1 through a mounting mechanism, a heat preservation storage tank 412 is fixedly installed inside the mounting block 411, a solenoid valve 413 is fixedly installed at the lower end of the heat preservation storage tank 412, a pipeline 414 is fixedly installed at the lower end of the solenoid valve 413, the upper and lower ends inside the main body housing 1 are respectively fixedly connected with a first partition board 111 and a second partition board 112, the upper and lower ends of the pipeline 414 are respectively inserted through the first partition board 111 and the second partition board 112, and a cable rope 415 is fixedly installed at the upper end of the mounting block 411.

[0031] The filtering assembly includes a baffle 211, the left and right sides of the inner wall of the lower end of the main body housing 1 are both slidably connected with the baffle 211, the upper end of the baffle 211 is fixedly connected with a mounting plate 212, the mounting plate 212 is located between the first partition board 111 and the second partition board 112, an electric push rod 213 is fixedly installed in the middle of the upper surface of the mounting plate 212, the upper end of the electric push rod 213 is fixedly installed in the middle of the lower surface of the first partition board 111, and filter nets 214 are fixedly connected to the left and right sides of the lower end of the main body housing 1 at the positions of the baffles 211.

[0032] The lower end of the baffle plate 211 is fixedly connected with an extrusion plate 215, and the lower side surface of the extrusion plate 215 is flush with the lowermost end of the filter net 214.

[0033] The anti-blocking component includes a first annular plate 311. The lower end of the main body housing 1 is rotatably connected with the first annular plate 311. A tooth groove 312 is formed inside the first annular plate 311. A motor 313 is fixedly installed on the front side of the lower end of the main body housing 1. A gear 314 is fixedly installed on the output shaft of the motor 313. The gear 314 meshes with the tooth groove 312. A scraping plate 315 is fixedly connected to the lower side surface of the first annular plate 311. The lower end of the scraping plate 315 is fixedly connected with a second annular plate 316. The second annular plate 316 is rotatably connected with the main body housing 1.

[0034] The working principle of this embodiment: When the main body housing 1 moves to the fluid layer where sampling is required, by controlling the contraction of the electric push rod 213, the mounting plate 212 drives the baffle plate 211 to move upward, so that the external fluid can enter the main body housing 1 through the filter net 214, and the sand and stones in the fluid are filtered outside the main body housing 1. At this time, the fluid in the main body housing 1 can be extracted and sampled. By controlling the motor 313 to work, the gear 314 rotates, and then the first annular plate 311 can be driven to rotate, so that the scraping plate 315 can remove the sand and stones attached to the surface of the filter net 214, thereby preventing the filter net 214 from being blocked, and improving the filtration efficiency. After the sampling in this fluid layer is completed, control the electric push rod 213 to extend, so that the extrusion plate 215 moves downward to squeeze out the remaining fluid in the main body housing 1 through the filter net 214, thereby preventing the remaining fluid in the main body housing 1 from mixing with the fluid of the next sampling fluid layer.

[0035] Embodiment 2

[0036] As Figures 1-3 shown, a filter for a formation fluid sampling probe while drilling includes a main body housing 1; a filtering component is arranged at the lower end of the main body housing 1, an anti-blocking component is arranged outside the filtering component, and a sampling component is arranged inside the main body housing 1. The sampling component includes a mounting block 411. The upper end of the main body housing 1 is provided with the mounting block 411 through a mounting mechanism. A heat preservation storage tank 412 is fixedly installed inside the mounting block 411. A solenoid valve 413 is fixedly installed at the lower end of the heat preservation storage tank 412. A pipeline 414 is fixedly installed at the lower end of the solenoid valve 413. The upper and lower ends of the inside of the main body housing 1 are respectively fixedly connected with a first partition plate 111 and a second partition plate 112. The upper and lower ends of the pipeline 414 are respectively inserted through the first partition plate 111 and the second partition plate 112. A cable rope 415 is fixedly installed at the upper end of the mounting block 411.

[0037] The installation mechanism includes a sliding groove 511. A sliding groove 511 is provided in the middle of the installation block 411. A slider 512 is slidably connected in the sliding groove 511. A spring 513 is arranged in the sliding groove 511. Two ends of the spring 513 are respectively fixedly connected with the inner wall of the sliding groove 511 and the slider 512. On one side of the slider 512 away from the middle of the installation block 411, a fixed insertion rod 514 is fixedly connected. The fixed insertion rod 514 penetrates through the installation block 411 and extends to the outside of the installation block 411. One end of the fixed insertion rod 514 located outside the installation block 411 is inserted into the upper end of the main body housing 1. A jack 515 matching the fixed insertion rod 514 is provided at the upper end of the main body housing 1. The upper end of the slider 512 is fixedly connected with a pulling block 516.

[0038] The working principle of this embodiment: After the sampling is completed and the main body housing 1 is taken out from the ground, by pulling the pulling block 516 inward, the fixed insertion rod 514 is withdrawn from the jack 515. At this time, the sampling assembly can be removed from the main body housing 1, which is convenient for cleaning the main body housing 1 and the sampling assembly.

[0039] In this embodiment, the lower end of the main body housing 1 is threadedly connected with a bottom plate 6. The upper surface of the bottom plate 6 is mutually attached to the lower side surface of the extrusion plate 215. After the sampling is completed and the main body housing 1 is taken out from the ground, the bottom plate 6 can be removed from the main body housing 1, and the solenoid valve 413 is controlled to open, so that the sample in the heat preservation storage tank 412 can be quickly taken out.

[0040] In several embodiments of the present invention, a heat preservation and heat insulation layer 7 is adhered to the inner wall of the upper end of the main body housing 1. The material of the heat preservation and heat insulation layer 7 is silica aerogel. The heat preservation storage tank 412 is heat-insulated through the heat preservation and heat insulation layer 7, so that the sample in the heat preservation storage tank 412 is as close as possible to the state when it is in the fluid layer.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0042] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A filter for a formation fluid sampling probe while drilling, characterized in that, it includes a main body housing (1); a filtering component is arranged at the lower end of the main body housing (1), an anti-blocking component is arranged outside the filtering component, a sampling component is arranged inside the main body housing (1), the sampling component includes a mounting block (411), the mounting block (411) is arranged at the upper end of the main body housing (1) through a mounting mechanism, a heat preservation storage tank (412) is fixedly installed inside the mounting block (411), a solenoid valve (413) is fixedly installed at the lower end of the heat preservation storage tank (412), a pipeline (414) is fixedly installed at the lower end of the solenoid valve (413), the upper and lower ends inside the main body housing (1) are respectively fixedly connected with a first partition plate (111) and a second partition plate (112), the upper and lower ends of the pipeline (414) are respectively inserted through the first partition plate (111) and the second partition plate (112), and a cable rope (415) is fixedly installed at the upper end of the mounting block (411); the filtering component includes a baffle plate (211), the left and right sides of the inner wall of the lower end of the main body housing (1) are both slidably connected with the baffle plate (211), the upper end of the baffle plate (211) is fixedly connected with a mounting plate (212), the mounting plate (212) is located between the first partition plate (111) and the second partition plate (112), an electric push rod (213) is fixedly installed in the middle of the upper surface of the mounting plate (212), the upper end of the electric push rod (213) is fixedly installed in the middle of the lower surface of the first partition plate (111), and filter meshes (214) are fixedly connected to the left and right sides of the lower end of the main body housing (1) at the position of the baffle plate (211); the lower end of the baffle plate (211) is fixedly connected with a pressing plate (215), and the lower surface of the pressing plate (215) is flush with the lowermost end of the filter meshes (214); the anti-blocking component includes a first annular plate (311), the lower end of the main body housing (1) is rotatably connected with the first annular plate (311), a tooth groove (312) is arranged inside the first annular plate (311), a motor (313) is fixedly installed at the front side of the lower end of the main body housing (1), a gear (314) is fixedly installed on the output shaft of the motor (313), the gear (314) meshes with the tooth groove (312), a scraping plate (315) is fixedly connected to the lower surface of the first annular plate (311), and a second annular plate (316) is fixedly connected to the lower end of the scraping plate (315), and the second annular plate (316) is rotatably connected with the main body housing (1); the mounting mechanism includes a sliding groove (511), a sliding groove (511) is arranged in the middle of the mounting block (411), a sliding block (512) is slidably connected inside the sliding groove (511), and a spring (513) is arranged inside the sliding groove (511).

2. A filter for a formation fluid sampling probe while drilling according to claim 1, characterized in that, Both ends of the spring (513) are fixedly connected to the inner wall of the chute (511) and the slider (512) respectively. One side of the slider (512) far away from the middle of the mounting block (411) is fixedly connected with a fixed insertion rod (514). The fixed insertion rod (514) penetrates through the mounting block (411) and extends to the outside of the mounting block (411). The end of the fixed insertion rod (514) located outside the mounting block (411) is inserted into the upper end of the main body housing (1). The upper end of the main body housing (1) is provided with a jack (515) that cooperates with the fixed insertion rod (514). The upper end of the slider (512) is fixedly connected with a pulling block (516).

3. The filter for a formation fluid sampling probe while drilling according to claim 2, characterized in that the lower end of the main body housing (1) is threadedly connected with a bottom plate (6). The upper surface of the bottom plate (6) is mutually attached to the lower side surface of the pressing plate (215).

4. The filter for a formation fluid sampling probe while drilling according to claim 1, characterized in that the inner wall of the upper end of the main body housing (1) is adhered with a thermal insulation layer (7). The material of the thermal insulation layer (7) is silica aerogel.

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