A segmented sampler for crude oil storage tanks

Abstract

The present invention discloses a segmented sampler for crude oil storage tanks, comprising a base, an inner tube, and an outer tube. The inner tube is formed of a plurality of cylindrical inner tube units connected in sequence by threads to form independent segmented chambers. Each inner tube unit has a liquid inlet opening on the upper portion of the tube wall. The inner tube is seated on the base. A pair of vertical guide rods are provided on opposite sides of the upper surface edge of the base. The tops of the pair of guide rods are provided with a lifting rope with a scale. The outer tube is a cylinder with a top cover, an open bottom, and an inner diameter slightly larger than the outer diameter of the inner tube. The top of the outer tube is provided with an outer tube lifting rope. A guide ring is provided on the side outer wall that is sleeved on the two guide rods. The outer tube is sleeved on the outside of the inner tube and can slide up and down along the two guide rods to open or close the liquid inlet of the inner tube. The present invention has a simple structure and is easy to operate. It can quickly complete the oil-water transition section sampling operation, and can be lowered into the sampling barrel to take out samples of each part of the oil-water interface at one time. The thickness and depth of the oil-water transition section can also be accurately determined, thereby improving efficiency.

Description

Technical Field

[0001] The invention relates to a crude oil storage tank sampler, in particular to a segmented sampler for a crude oil storage tank. Background Art

[0002] During production, it's often necessary to sample the produced fluid within oil storage tanks. In a water-containing crude oil storage tank, the oil-water interface is typically not distinct, representing a transitional phase, consisting of water, oil-in-water emulsion, water-in-oil emulsion, and anhydrous crude oil. Therefore, sampling the oil-water interface in large tanks has become a challenge for gathering and transportation sites. Existing methods for sampling the oil-water interface in large tanks involve lowering a specialized sampling bucket with a lid to a specified depth, then lifting it with a string tied to the lid. The lid is then opened and the sample is retrieved. This process is repeated multiple times to obtain the required samples and oil-water interface values. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a segmented sampler for a crude oil storage tank which has a simple structure and is easy to operate.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a segmented sampler for a crude oil storage tank, comprising a base, an inner cylinder and an outer cylinder, the inner cylinder being composed of a number of cylindrical inner cylinder units connected in sequence by threads to form independent segmented chambers, a liquid inlet being opened on the upper part of the cylinder wall of each inner cylinder unit, the inner cylinder being seated on the base, a pair of vertical guide rods being provided on opposite sides near the upper surface edge of the base, a lifting rope with scale being provided on the top of the pair of guide rods, the outer cylinder being a cylinder with a top cover, an open bottom and an inner diameter slightly larger than the outer diameter of the inner cylinder, an outer cylinder lifting rope being provided on the top of the outer cylinder, a guide ring being provided on the side outer wall which is sleeved on the two guide rods, the outer cylinder being sleeved on the outside of the inner cylinder, and being able to slide up and down along the two guide rods to open or close the liquid inlet of the inner cylinder.

[0005] A pair of nuts are provided on opposite sides of the upper surface edge of the base. The lower part of the guide rod is provided with an external thread, which is connected to the nut on the base through a screw buckle to vertically fix the guide rod.

[0006] There are one or more liquid inlet holes, and the multiple liquid inlet holes are evenly distributed at the same height.

[0007] The beneficial effects of the present invention are: simple structure, convenient operation, and the ability to quickly complete the sampling operation of the oil-water transition section of a water-containing crude oil storage tank. The sampling barrel can be lowered into the sampling barrel at one time to take out samples of various parts of the oil-water interface, and the thickness and depth of the oil-water transition section can be accurately determined, thereby improving efficiency and providing a reliable basis for crude oil production analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the segmented sampler for the crude oil storage tank of the present invention. DETAILED DESCRIPTION

[0009] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0010] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0011] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0012] like Figure 1 As shown, the segmented sampler of the crude oil storage tank of the present invention includes a base 9, an inner tube 7 and an outer tube 4. The inner tube 7 is composed of a plurality of cylindrical inner tube units connected in sequence by threads to form independent segmented chambers. A liquid inlet 6 is opened on the upper part of the tube wall of each inner tube unit. The inner tube 7 is located on the base 9. A pair of vertical guide rods 5 are provided on opposite sides of the upper surface edge of the base 9. A lifting rope 1 with a scale is provided on the top of the pair of guide rods 5. The outer tube 4 is a cylinder with a top cover, an open bottom and an inner diameter slightly larger than the outer diameter of the inner tube 7. An outer tube lifting rope 2 is provided on the top of the outer tube 4, and a guide ring 3 is provided on the side outer wall which is sleeved on the two guide rods 5. The outer tube 4 is sleeved on the outside of the inner tube 7 and can slide up and down along the two guide rods 5 to open or close the liquid inlet 6 of the inner tube 7.

[0013] A pair of nuts 8 are provided on opposite sides of the upper surface edge of the base 9 . The lower portion of the guide rod 5 has an external thread, which is connected to the nut 8 on the base 9 through a screw buckle to vertically fix the guide rod 5 .

[0014] There are one or more liquid inlet holes 6, and the multiple liquid inlet holes 6 are evenly distributed at the same height.

[0015] The disposable multi-segment sampler of the present invention is designed as a double-barrel sampler. The inner barrel is divided into several partitions, which are connected by threads to form segmented chambers. The upper part of each barrel wall is opened. The outer barrel is sleeved on the inner barrel. When sampling, the sampler is connected to the upper part of the guide rod by a lifting rope with a scale. The lifting rope with a scale suspends and pulls the entire sampling barrel, and is lowered from the oil sampling port on the top of the storage tank. The lifting rope of the outer barrel is lowered accordingly, and the lifting rope of the outer barrel is in a relaxed state during the lowering process. When it reaches the predetermined depth, the outer barrel is lifted up by the lifting rope of the outer barrel. After the liquid in the oil-water interface transition section flows into the partitioned inner barrel chambers respectively through the liquid inlet holes, the outer barrel is lowered, the liquid inlet holes on the inner barrel are closed, and the liquid is extracted to complete the sampling operation. It is possible to lower the sampling barrel into the oil-water interface once to take out samples of each part, and accurately determine the thickness and depth of the oil-water transition section.

[0016] The liquid inlet hole on the wall of each inner cylinder unit can be one or more liquid inlet holes evenly distributed at the same height.

[0017] The guide rod has external threads on its lower portion, connected to the bottom of the inner tube via a nut. When the outer tube descends under its own weight, a gap is created between it and the inner tube, allowing it to be moved up and down by the outer tube's lifting rope. The outer tube's guide ring slides along the guide rod, guiding the outer tube down to cover the inner tube. The graduated lifting rope can be a dedicated measuring rope or a steel tape measure for depth and oil measurement on-site.

[0018] In summary, the content of the present invention is not limited to the above-mentioned embodiments. People with insight in the same field can easily propose other embodiments within the technical guidance of the present invention, but such embodiments are all included in the scope of the present invention.

Claims

1. A segmented sampler for a crude oil storage tank, comprising a base (9), an inner cylinder (7) and an outer cylinder (4), characterized in that: The inner cylinder (7) is composed of a plurality of cylindrical inner cylinder units connected in sequence by threads to form independent segmented chambers. A liquid inlet (6) is opened on the upper part of the cylinder wall of each inner cylinder unit. The inner cylinder (7) is located on a base (9). A pair of vertical guide rods (5) are provided on opposite sides of the upper surface edge of the base (9). The tops of the pair of guide rods (5) are provided with a lifting rope (1) with scales. The outer cylinder (4) is a cylinder with a top cover, an open bottom, and an inner diameter slightly larger than the outer diameter of the inner cylinder (7). The top of the outer cylinder (4) is provided with an outer cylinder lifting rope (2). The outer wall of the side is provided with a guide ring (3) sleeved on the two guide rods (5). The outer cylinder (4) is sleeved on the outside of the inner cylinder (7) and can slide up and down along the two guide rods (5) to open or close the liquid inlet (6) of the inner cylinder (7).

2. The segmented sampler for a crude oil storage tank according to claim 1, characterized in that: A pair of nuts (8) are provided on opposite sides of the upper surface edge of the base (9); the lower portion of the guide rod (5) has an external thread, which is connected to the nut (8) on the base (9) through a screw thread to vertically fix the guide rod (5).

3. The segmented sampler for a crude oil storage tank according to claim 1, characterized in that: The liquid inlet holes (6) are one or more, and the multiple liquid inlet holes (6) are evenly distributed at the same height.

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