Eccentric wellhead testing oil wiper and eccentric wellhead device

Abstract

The utility model relates to an eccentric wellhead testing oil wiper and an eccentric wellhead device, the oil wiper comprises an outer cylinder, an oil scraping cylinder and an oil scraping sleeve, and the upper end and the lower end of the outer cylinder are open; the oil scraping cylinder and the oil scraping sleeve are coaxially installed in the outer cylinder, and the upper end and the lower end are open. The cable lifting device has the advantages that the structure is simple, the design is reasonable, crude oil can be scraped off from a cable in the cable lifting process, the crude oil falls into a shaft, and pollution to a well mouth and a well site is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum exploitation, in particular to an eccentric wellhead test oil scraper and an eccentric wellhead device. Background Art

[0002] When there is a production profile test, since the construction well is an oil well, when the instrument cable is pulled up after the test, crude oil will be brought out on the cable, which often causes contamination of the wellhead. Utility Model Content

[0003] The utility model provides an eccentric wellhead test oil scraper and an eccentric wellhead device, aiming to solve the problems in the prior art.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] An eccentric wellhead test oil scraper comprises an outer cylinder, an oil scraper cylinder and an oil scraper sleeve. The upper and lower ends of the outer cylinder are both open; the oil scraper cylinder and the oil scraper sleeve are coaxially installed in the outer cylinder, and the upper and lower ends are open respectively.

[0006] The utility model has the beneficial effect that during use, the entire oil scraper is installed on the eccentric wellhead device by using the outer cylinder, and the oil scraper cylinder and the oil scraper sleeve wrap the cable at the same time, so that the oil scraper cylinder and the oil scraper sleeve can scrape the crude oil on the cable during the process of lifting the cable, and the oil scraping effect is better.

[0007] The utility model has the advantages of simple structure and reasonable design, and can scrape crude oil from the cable during the cable lifting process, and the crude oil falls into the wellbore, thus avoiding pollution to the wellhead and the well site.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the upper end of the oil scraper sleeve is fitted with the lower end of the oil scraper cylinder, and the lower end thereof is close to the lower end of the outer cylinder.

[0010] The beneficial effect of adopting the above further solution is that the oil scraper sleeve and the oil scraper cylinder are reasonably distributed, thereby ensuring the cable oil scraping effect.

[0011] Furthermore, the inner diameter of the oil scraper sleeve is equal to the inner diameter of the oil scraper cylinder, and the wall thickness of the oil scraper sleeve decreases from top to bottom.

[0012] The beneficial effect of adopting the above further scheme is that the structure of the oil scraper sleeve is reasonably set, and the overall structure is conical, so as to better fit the cable to scrape the oil, the oil scraping effect is better, and consumables are saved and the cost is low.

[0013] Furthermore, the oil scraper cylinder and / or the oil scraper sleeve are respectively flexible cylindrical structures.

[0014] The beneficial effect of adopting the above further solution is that it is more reasonable to use flexible materials for the oil scraper cylinder and the oil scraper sleeve, which can better fit the cable and further ensure the cable oil scraping effect.

[0015] Furthermore, the oil scraper cylinder and / or the oil scraper sleeve are provided with an opening penetrating from top to bottom.

[0016] The beneficial effect of adopting the above further solution is that the openings on the oil scraper cylinder and the oil scraper sleeve are reasonably arranged so that they can be put on the cable, which is convenient for assembly and saves time and effort.

[0017] Furthermore, the outer cylinder is formed by splicing two half cylinders.

[0018] The beneficial effect of adopting the above further solution is that the structure of the outer cylinder is reasonably arranged, which is convenient for being put on the outside of the oil scraper cylinder and the oil scraper sleeve, and the assembly is convenient, saving time and labor.

[0019] Furthermore, the lower ends of the two semi-cylinders are respectively fixedly connected with arc-shaped threaded sheets, and the two threaded sheets can be spliced ​​to form a thread for connecting the eccentric wellhead device.

[0020] The beneficial effects of adopting the above further solution are simple structure and reasonable design. The thread formed by two threaded sheets facilitates the installation of the entire oil scraper on the eccentric wellhead device, which is convenient for disassembly and assembly, saving time and effort.

[0021] Furthermore, a connecting assembly is installed on the two semi-cylinders to connect the two together.

[0022] The beneficial effect of adopting the above further solution is that the two half cylinders are easy to assemble, saving time and effort.

[0023] Furthermore, the connecting assembly includes at least one pair of connecting bolts, and at least one pair of penetrating through holes are respectively provided on both sides of the two semi-cylinders. The pair of connecting bolts are respectively installed in the two pairs of through holes to connect the two semi-cylinders.

[0024] The beneficial effect of adopting the above further solution is that the two half cylinders can be detachably connected by connecting bolts, which is convenient for disassembly and assembly, saving time and effort.

[0025] The utility model also relates to an eccentric wellhead device, comprising a wellhead device body and the eccentric wellhead test scraper as described above, wherein the wellhead device body is provided with a mounting hole penetrating up and down, and the outer cylinder is vertically mounted at the mounting hole.

[0026] The beneficial effect of adopting the above further scheme is that the utility model also provides an eccentric wellhead device, which has a simple structure and a reasonable design. The crude oil can be scraped off the cable during the cable lifting process, and the crude oil falls into the wellbore, avoiding pollution of the wellhead and the well site. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the oil scraper in the utility model;

[0028] Figure 2 It is a partial structural schematic diagram of the oil scraper in the utility model;

[0029] Figure 3 This is an internal cross-sectional view of the oil scraper in the utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the oil scraper in the utility model when scraping oil;

[0031] Figure 5 This is a schematic diagram of the structure of the oil scraper cylinder in the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the oil scraper sleeve in the utility model;

[0033] Figure 7 It is a perspective view of the oil scraper sleeve in the utility model;

[0034] Figure 8 It is a structural schematic diagram of the eccentric wellhead device in the utility model.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1. Outer cylinder; 11. Half cylinder; 2. Oil scraper cylinder; 3. Oil scraper sleeve; 4. Opening; 5. Thread; 51. Threaded sheet; 6. Connecting bolt; 7. Through hole; 8. Wellhead device body; 9. Mounting hole; 10. Cable. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] Example 1

[0042] like Figures 1 to 7 As shown, this embodiment provides an eccentric wellhead test scraper, including an outer cylinder 1, a scraper cylinder 2 and a scraper sleeve 3, wherein both upper and lower ends of the outer cylinder 1 are open; the scraper cylinder 2 and the scraper sleeve 3 are coaxially installed in the outer cylinder 1, and both upper and lower ends thereof are open.

[0043] During use, the entire oil scraper is installed on the eccentric wellhead device using the outer cylinder 1, and the oil scraper cylinder 2 and the oil scraper sleeve 3 wrap the cable 10, so that the oil scraper cylinder 2 and the oil scraper sleeve 3 scrape the crude oil on the cable 10 during the process of lifting the cable 10, and the oil scraping effect is better.

[0044] This embodiment has a simple structure and reasonable design. The crude oil can be scraped off the cable during the cable lifting process, and the crude oil falls into the wellbore, thereby avoiding pollution of the wellhead and the well site.

[0045] Example 2

[0046] On the basis of Example 1, in this embodiment, the upper end of the oil scraper sleeve 3 is in contact with the lower end of the oil scraper cylinder 2 , and the lower end thereof is close to the lower end of the outer cylinder 1 .

[0047] The oil scraper sleeve 3 and the oil scraper cylinder 2 are reasonably distributed to ensure the oil scraping effect of the cable 10.

[0048] Based on the above solution, the upper end of the oil scraper cylinder 2 is flush with or lower than the upper end of the outer cylinder 1 .

[0049] Example 3

[0050] On the basis of the above embodiments, in this embodiment, the inner diameter of the oil scraper sleeve 3 is equal to the inner diameter of the oil scraper cylinder 2, and the wall thickness of the oil scraper sleeve 3 decreases from top to bottom.

[0051] The structure of the oil scraper sleeve 3 is reasonable, and the overall structure is conical, so as to better fit with the cable 10 to scrape the oil, the oil scraping effect is better, and consumables are saved, and the cost is low.

[0052] Alternatively, the oil scraper sleeve 3 may also adopt a structure with the same size at both ends.

[0053] Preferably, in this embodiment, the length of the oil scraper cylinder 2 is greater than the length of the oil scraper sleeve 3 .

[0054] Example 4

[0055] On the basis of the above embodiments, in this embodiment, the oil scraper cylinder 2 and / or the oil scraper sleeve 3 are respectively in a flexible cylindrical structure.

[0056] It is more reasonable to use flexible materials for the oil scraper cylinder 2 and the oil scraper sleeve 3, so that they can better fit the cable 10 and further ensure the oil scraping effect of the cable 10.

[0057] Example 5

[0058] On the basis of Embodiment 4, in this embodiment, the oil scraper cylinder 2 and / or the oil scraper sleeve 3 are provided with an opening 4 which penetrates from top to bottom.

[0059] The openings 4 on the oil scraper cylinder 2 and the oil scraper sleeve 3 are reasonably arranged so as to be sleeved on the cable 10, which is convenient for assembly and saves time and effort.

[0060] Based on the above scheme, the setting of the above opening 4 makes it convenient to break the oil scraper cylinder 2 and the oil scraper sleeve 3 apart and directly put them on the corresponding parts of the cable 10, without passing one end of the cable 10 through the oil scraper cylinder 2 and the oil scraper sleeve 3, which makes the operation simpler, saving time and effort.

[0061] Alternatively, the oil scraper cylinder 2 and the oil scraper sleeve 3 may not be provided with openings, in which case one end of the cable 10 needs to be passed through the oil scraper cylinder 2 and the oil scraper sleeve 3 in advance.

[0062] Example 6

[0063] On the basis of the above embodiments, in this embodiment, the outer cylinder 1 is formed by splicing two half cylinders 11 .

[0064] The outer cylinder 1 has a reasonable structure and can be conveniently sleeved on the oil scraper cylinder 2 and the oil scraper sleeve 3, so the assembly is convenient, saving time and effort.

[0065] Example 7

[0066] On the basis of Example 6, in this embodiment, the lower ends of the two semi-cylinders 11 are respectively fixedly connected with arc-shaped threaded pieces 51, and the two threaded pieces 51 can be spliced ​​to form a thread 5 for connecting an eccentric wellhead device.

[0067] The solution has a simple structure and a reasonable design. The thread 5 formed by two threaded sheets 51 facilitates the installation of the entire oil scraper on the eccentric wellhead device, and is easy to disassemble and assemble, saving time and effort.

[0068] Alternatively, during assembly, the lower end of the outer cylinder 1 is directly welded to the eccentric wellhead device, but this solution is not as convenient for assembly and disassembly as the above solution.

[0069] Based on the above solution, the lower end of the oil scraper sleeve 3 can be located above the thread 5 or partially overlap with the thread 5 .

[0070] Example 8

[0071] On the basis of any one of Embodiments 6 to 7, in this embodiment, a connecting component for connecting the two half cylinders 11 is installed on the two half cylinders 11.

[0072] The two half cylinders 11 are easy to assemble, saving time and effort.

[0073] Alternatively, the two sides of the two half cylinders 11 are directly welded together, but this convenient assembly is not as convenient as the above solution.

[0074] Example 9

[0075] On the basis of Example 8, in this embodiment, the connecting assembly includes at least one pair of connecting bolts 6, and at least one pair of penetrating through holes 7 are respectively provided on both sides of the two semi-cylinders 11, and the pair of connecting bolts 6 are respectively installed in the two pairs of through holes 7 to connect the two semi-cylinders 11.

[0076] This solution can realize the detachable connection of the two half cylinders 11 by using the connecting bolts 6, which is convenient for disassembly and assembly, saving time and effort.

[0077] Preferably, in this embodiment, a plurality of pairs of through holes 7 are respectively provided on both sides of the two semi-cylinders 11 , and a connecting bolt 6 is respectively installed in each pair of through holes 7 .

[0078] In addition, three pairs of through holes 7 are respectively arranged on both sides of the two semi-cylinders 11 , and the number of the through holes 7 is reasonably arranged to ensure the stability of the connection between the two semi-cylinders 11 .

[0079] Moreover, a plurality of pairs of grooves are disposed on both sides of the two semi-cylinder bodies 11 , and the plurality of pairs of through holes 7 are located in the plurality of pairs of grooves.

[0080] Preferably, in this embodiment, each pair of through holes 7 may be holes with smooth walls or threaded holes.

[0081] Alternatively, a clamp may be used to replace the above-mentioned connection assembly, and the two half cylinders 11 may be directly connected together using the clamp.

[0082] In addition, the above-mentioned clamp can be provided in one or more forms.

[0083] Alternatively, threaded sections are arranged on the outer walls of the two half-cylinders 11 opposite to each other, nuts are threadedly sleeved on the two threaded sections, and the nuts are used to tightly hold the two half-cylinders 11 so that the two half-cylinders 11 form a whole.

[0084] Example 10

[0085] Based on the above embodiments, Figure 8 As shown, this embodiment also provides an eccentric wellhead device, including a wellhead device body 8, and also includes the eccentric wellhead test scraper as described above, the wellhead device body 8 is provided with a mounting hole 9 that passes through from top to bottom, and the outer tube 1 is vertically installed at the mounting hole 9.

[0086] This embodiment also provides an eccentric wellhead device, which has a simple structure and reasonable design. The crude oil can be scraped off the cable during the cable lifting process, and the crude oil falls into the wellbore, avoiding pollution of the wellhead and the well site.

[0087] The assembly process and oil scraping principle of the utility model are as follows:

[0088] First, the operator manually sleeves the oil scraper cylinder 2 and the oil scraper sleeve 3 on the corresponding parts of the cable 10 respectively; then, manually sleeves the two half cylinders 11 on the outside of the oil scraper cylinder 2 and the oil scraper sleeve 3, and fixes the two oil scraper cylinders 2 and the oil scraper sleeve 3 together by any of the above methods; finally, the thread 5 is threadedly connected with the mounting hole 9 on the eccentric wellhead device;

[0089] During the operation, the scraper barrel 2 and the scraper sleeve 3 can scrape the crude oil on the cable 10 when the cable 10 is lifted, and the crude oil falls into the wellbore, avoiding pollution of the wellhead and the well site.

[0090] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0091] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An eccentric wellhead test scraper, characterized in that: The oil scraper sleeve (3) comprises an outer cylinder (1), an oil scraper cylinder (2) and an oil scraper sleeve (3), wherein the upper and lower ends of the outer cylinder (1) are both open; the oil scraper cylinder (2) and the oil scraper sleeve (3) are coaxially installed in the outer cylinder (1), and the upper and lower ends thereof are respectively open.

2. The eccentric wellhead test oil scraper according to claim 1, characterized in that: The upper end of the oil scraper sleeve (3) is in contact with the lower end of the oil scraper cylinder (2), and the lower end of the oil scraper sleeve (3) is close to the lower end of the outer cylinder (1).

3. The eccentric wellhead test oil scraper according to claim 1, characterized in that: The inner diameter of the oil scraper sleeve (3) is equal to the inner diameter of the oil scraper cylinder (2), and the wall thickness of the oil scraper sleeve (3) decreases from top to bottom.

4. The eccentric wellhead test oil scraper according to any one of claims 1 to 3, characterized in that: The oil scraper cylinder (2) and / or the oil scraper sleeve (3) are each a flexible cylindrical structure.

5. The eccentric wellhead test oil scraper according to claim 4, characterized in that: The oil scraper cylinder (2) and / or the oil scraper sleeve (3) are provided with an opening (4) penetrating from top to bottom.

6. The eccentric wellhead test oil scraper according to any one of claims 1 to 3, characterized in that: The outer cylinder (1) is formed by splicing two half cylinders (11).

7. The eccentric wellhead test oil scraper according to claim 6, characterized in that: The lower ends of the two semi-cylinders (11) are respectively fixedly connected with arc-shaped threaded sheets (51), and the two threaded sheets (51) can be spliced ​​to form a thread (5) for connecting an eccentric wellhead device.

8. The eccentric wellhead test oil scraper according to claim 6, characterized in that: A connecting assembly for connecting the two half cylinders (11) is installed on the two half cylinders (11).

9. The eccentric wellhead test oil scraper according to claim 8, characterized in that: The connecting assembly comprises at least one pair of connecting bolts (6), and at least one pair of through holes (7) are respectively arranged on both sides of the two semi-cylinders (11) opposite to each other, and the pair of connecting bolts (6) are respectively installed in the two pairs of through holes (7) to connect the two semi-cylinders (11).

10. An eccentric wellhead device, comprising a wellhead device body (8), characterized in that: It also includes an eccentric wellhead test scraper as described in any one of claims 1 to 9, wherein the wellhead device body (8) is provided with a mounting hole (9) penetrating from top to bottom, and the outer cylinder (1) is vertically mounted at the mounting hole (9).

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