Oil scraping self-sealing valve with core body convenient to replace

Abstract

The utility model relates to an oil scraping self-seal with a core body convenient to replace, and belongs to the technical field of oil field wellhead tools. Comprising an upper flange, a lower pressing cylinder, an upper sealing core body and a lower sealing core body, the upper flange and the lower pressing cylinder are fixedly connected through a plurality of bolts, the upper sealing core body and the lower sealing core body are installed between the upper flange and the lower pressing cylinder in a pressing mode, and the upper sealing core body and the lower sealing core body are arranged up and down. According to the oil scraping self-seal with the core bodies convenient to replace, an oil pipe does not need to be detached, the upper sealing core body and the lower sealing core body can be directly taken out, then the new upper sealing core body and the new lower sealing core body are arranged on the oil pipe in a sleeving mode and placed in a center hole of the lower pressing cylinder, and therefore rapid replacement of the upper sealing core body and the lower sealing core body is completed. The pressing protrusion of the upper flange is matched with the inner boss of the lower pressing cylinder, so that the upper sealing core body and the lower sealing core body are pressed tightly.

Description

TECHNICAL FIELD

[0001] The utility model relates to a convenient to replace core's oil scraping self-sealing belongs to oil field well mouth tool technical field. BACKGROUND

[0002] In the oil field operation process of tubing, usually adopts self-sealing to seal the pressure under the well, at the same time, self-sealing can also scrape the crude oil adhered to the outer surface of the tubing. And the self-sealing core in the self-sealing is just the key to the good or bad self-sealing effect.

[0003] The existing patent with the application number 200620099785.3, the name is general high-pressure light self-sealing core. It is composed of core body, upper flange and trumpet-shaped lower swing, the upper part of the core body is provided with the upper flange, the lower part is provided with a trumpet-shaped lower swing, and the center is provided with a through hole. Although the core body can withstand the high pressure of the well, the core body will inevitably be worn out and need to be replaced. The existing core body is formed and fitted on the tubing through the through hole. When the core body needs to be replaced, the connection of the tubing needs to be disassembled, and then the new core body can be fitted on the tubing. The disassembly process of the tubing connection is very troublesome, and the work efficiency of the core body replacement is low. Therefore, it is necessary to improve it. SUMMARY

[0004] The utility model discloses a convenient to replace core's oil scraping self-sealing that simple operation, convenient to use, improve the work efficiency of core body replacement.

[0005] The technical scheme of the utility model is:

[0006] A convenient to replace core's oil scraping self-sealing, including upper flange, lower pressure cylinder, upper sealing core body and lower sealing core body, its characterized in that: upper flange and lower pressure cylinder are fixedly connected through a plurality of bolts, upper sealing core body and lower sealing core body are pressure assembled between upper flange and lower pressure cylinder, and upper sealing core body and lower sealing core body are arranged in an upper and lower mode.

[0007] The center positions of the upper flange and the lower pressure cylinder are respectively provided with guide holes, the outer side of the guide hole along the end face of one end of the upper flange is provided with a pressing convex, the pressing convex is used for pressing the upper sealing core body, and the inner wall of the end head of the guide hole of the lower pressure cylinder is provided with an inner convex table, and the inner convex table is used for limiting the lower sealing core body.

[0008] The upper flange and the lower pressure cylinder are provided with a positioning steel ring, the end face of the upper flange corresponding to the positioning steel ring is provided with an upper positioning port, the end face of the lower pressure cylinder corresponding to the positioning steel ring is provided with a lower positioning port, and the upper positioning port and the lower positioning port are matched and clamped with the positioning steel ring.

[0009] The upper positioning port and the lower positioning port are trapezoidal in cross section, and the cross section of the positioning steel ring is octagonal.

[0010] The upper sealing core comprises a left core and a right core, the left core and the right core are in a "C" shape in cross section, the left core and the right core are enclosed in a circular ring shape, and the through hole of the left core and the right core after being enclosed corresponds to the upper positioning port of the upper flange, and the edge of the two ends of the through hole is in a circular truncated cone shape.

[0011] The left core and the right core are provided with sealing protrusions on the outer circle.

[0012] The lower sealing core comprises a first core and a second core, the first core and the second core are in a "C" shape in cross section, the first core and the second core are enclosed in a cylindrical shape, the central hole of the first core and the second core after being enclosed is in a drum shape, and the edge of the two ends of the central hole is in a circular truncated cone shape.

[0013] The utility model has the advantages that compared with the prior art, the utility model has the advantages that:

[0014] The oil scraping self-sealing device with the convenient core replacement function is characterized in that the upper flange is separated from the lower pressing cylinder by being disassembled through the bolts on the upper flange, the upper sealing core is composed of the left core and the right core and is enclosed in a circular ring shape, the lower sealing core is composed of the first core and the second core and is enclosed in a cylindrical shape, so the oil pipe does not need to be disassembled, the upper sealing core and the lower sealing core can be directly taken out, the new upper sealing core and the lower sealing core are respectively sleeved on the oil pipe and are placed in the central hole of the lower pressing cylinder, thereby the upper sealing core and the lower sealing core are quickly replaced, the upper flange is reset, the upper flange is locked through the bolts, the upper flange is locked, the pressing protrusion of the upper flange is matched with the inner protrusion of the lower pressing cylinder, the upper sealing core and the lower sealing core are pressed tightly, under the action of the upward and downward extrusion of the upper sealing core and the lower sealing core, the gap between the upper sealing core and the lower sealing core is tightly sealed, and the upper sealing core and the lower sealing core are deformed in the circumferential direction and are tightly sealed with the gap. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0016] Figure 2 It is a sectional structure schematic view of the utility model;

[0017] Figure 3 It is a three-dimensional structure schematic view of the upper sealing core in the utility model;

[0018] Figure 4 It is a three-dimensional structure schematic view of the lower sealing core in the utility model.

[0019] In the figure: 1, upper flange; 2, lower pressing cylinder; 3, upper sealing core; 4, lower sealing core; 5, bolt; 6, guide hole; 7, pressing convex; 8, inner convex; 9, left core; 10, right core; 11, first core; 12, second core; 13, center hole; 14, sealing convex; 15, positioning steel ring; 16, upper positioning port; 17, lower positioning port; 18, through hole. DETAILED DESCRIPTION

[0020] As shown in the accompanying drawings Figures 1-4

[0021] The oil scraping self-sealing device with convenient core replacement comprises an upper flange 1, a lower pressing cylinder 2, an upper sealing core 3 and a lower sealing core 4, the upper flange 1 and the lower pressing cylinder 2 are fixedly connected through a plurality of bolts 5, the upper flange 1 and the lower pressing cylinder 2 are respectively provided with guide holes 6 at the center positions, the upper flange 1 is provided with a pressing convex 7 on the outer side of the circumferential direction of the guide hole 6 at one end face, the pressing convex 7 is used for pressing the upper sealing core 3, and the lower pressing cylinder 2 is provided with an inner convex 8 on the inner wall of the end head of the guide hole 6 at one end, the inner convex 8 is used for limiting the lower sealing core 4.

[0022] The upper sealing core 3 and the lower sealing core 4 are pressed between the pressing convex 7 of the upper flange 1 and the inner convex 8 of the lower pressing cylinder 2, the upper sealing core 3 and the lower sealing core 4 are arranged in a vertical mode, the upper sealing core 3 comprises a left core 9 and a right core 10, the left core 9 and the right core 10 are in a “C” shape in cross section, the left core 9 and the right core 10 are enclosed in a circular ring shape, the through hole 18 after the enclosure of the left core 9 and the right core 10 corresponds to the guide hole 6 of the upper flange 1, and the edge of the two end ports of the through hole 18 is in a circular truncated cone shape.

[0023] The lower sealing core 4 comprises a first core 11 and a second core 12, the first core 11 and the second core 12 are in a “C” shape in cross section, the first core 11 and the second core 12 are enclosed in a cylindrical shape, the center hole 13 after the enclosure of the first core 11 and the second core 12 is in a drum shape in the middle part, the edge of the two end ports of the center hole 13 is in a circular truncated cone shape, and the center hole 13 after the enclosure of the first core 11 and the second core 12 corresponds to the through hole 18 after the enclosure of the left core 9 and the right core 10 and the guide hole 6 of the lower pressing cylinder 2.

[0024] The left core 9 and the right core 10 are provided with sealing convexes 14 on the outer circles, in work, the sealing convexes 14 can form a seal between the left core 9 and the right core 10 and the lower pressing cylinder 2.

[0025] ​A positioning steel ring 15 is arranged between the upper flange 1 and the lower pressing cylinder 2, the upper flange 1 is provided with an upper positioning port 16 corresponding to the end face of the positioning steel ring 15, the lower pressing cylinder 2 is provided with a lower positioning port 17 corresponding to the end face of the positioning steel ring 15, the upper positioning port 16 and the lower positioning port 17 are trapezoidal in cross section, the cross section of the positioning steel ring 15 is octagonal, the upper positioning port 16 and the lower positioning port 17 are clamped with the positioning steel ring 15, and the upper flange 1 and the lower pressing cylinder 2 are quickly positioned through cooperation of the upper positioning port 16, the lower positioning port 17 and the positioning steel ring 15 during work.

[0026] When the core needs to be replaced, the bolts 5 on the upper flange 1 are first disassembled, so that the upper flange 1 is separated from the lower pressing cylinder 2, then the upper sealing core 3 in the lower pressing cylinder 2 can be taken out, since the upper sealing core 3 is composed of the left core 9 and the right core 10, and the left core 9 and the right core 10 are enclosed in a circular ring shape, the oil pipe does not need to be disassembled, and the left core 9 and the right core 10 of the upper sealing core 3 can be directly taken down, after the upper sealing core 3 is taken out, since the lower sealing core 4 is composed of the first core 11 and the second core 12, and the first core 11 and the second core 12 are enclosed in a cylindrical shape, the oil pipe does not need to be disassembled, and the first core 11 and the second core 12 of the lower sealing core 4 can be directly taken out, then the new first core 11 and the second core 12, the new left core 9 and the right core 10 are respectively sleeved on the oil pipe and placed in the center hole 13 of the lower pressing cylinder 2, thereby completing the quick replacement of the upper sealing core 3 and the lower sealing core 4, the upper flange 1 is reset, and the upper flange 1 is locked by the bolts 5, after the upper flange 1 is locked, the convex 7 of the upper flange 1 and the inner boss 8 of the lower pressing cylinder 2 are matched to realize the pressing of the upper sealing core 3 and the lower sealing core 4, under the action of the upper and lower extrusion of the upper sealing core 3 and the lower sealing core 4, firstly, the gap between the upper sealing core 3 and the lower sealing core 4 is tightly sealed, secondly, the upper sealing core 3 and the lower sealing core 4 are deformed in the circumferential direction to tightly seal the gap.

Claims

1. A wiper self-seal with a core convenient to replace, comprising an upper flange (1), a lower pressing cylinder (2), an upper sealing core (3) and a lower sealing core (4), characterized in that: The upper flange (1) and the lower pressing cylinder (2) are fixedly connected through a plurality of bolts (5), the upper sealing core (3) and the lower sealing core (4) are press-fitted between the upper flange (1) and the lower pressing cylinder (2), and the upper sealing core (3) and the lower sealing core (4) are arranged in an up-down mode.

2. A self-sealing wiper according to claim 1, wherein: The upper flange (1) and the lower pressing cylinder (2) are provided with guide holes (6) at central positions, respectively, a pressing convex (7) is arranged on an end face of the upper flange (1) and outside the circumferential side of the guide hole (6), the pressing convex (7) is used for pressing the upper sealing core (3) downward, and an inner convex (8) is arranged on an inner wall of an end head of the guide hole (6) of the lower pressing cylinder (2), the inner convex (8) is used for limiting the lower sealing core (4).

3. The self-sealing wiper according to claim 1, wherein: The upper flange (1) and the lower pressing cylinder (2) are provided with a positioning steel ring (15), the upper flange (1) is provided with an upper positioning opening (16) on an end face corresponding to the positioning steel ring (15), the lower pressing cylinder (2) is provided with a lower positioning opening (17) on an end face corresponding to the positioning steel ring (15), and the upper positioning opening (16) and the lower positioning opening (17) are clamped in cooperation with the positioning steel ring (15).

4. A self-sealing wiper according to claim 3, wherein: The upper positioning opening (16) and the lower positioning opening (17) are trapezoidal in cross section, and the positioning steel ring (15) is octagonal in cross section.

5. The self-sealing wiper according to claim 1, wherein: The upper sealing core (3) comprises a left core (9) and a right core (10), the left core (9) and the right core (10) are "C"-shaped in cross section, the left core (9) and the right core (10) are enclosed in a circular ring shape, a through hole (18) after the left core (9) and the right core (10) are enclosed corresponds to the upper positioning opening (16) of the upper flange (1), and the two end port edges of the through hole (18) are circular truncated cone-shaped.

6. A self-sealing wiper according to claim 5, wherein: The left core (9) and the right core (10) are provided with sealing protrusions (14) on outer circles.

7. The self-sealing wiper according to claim 1, wherein: The lower sealing core (4) comprises a first core (11) and a second core (12), the first core (11) and the second core (12) are "C"-shaped in cross section, the first core (11) and the second core (12) are enclosed in a cylindrical shape, a central hole (13) after the first core (11) and the second core (12) are enclosed is drum-shaped in a middle part, and the two end port edges of the central hole (13) are circular truncated cone-shaped.

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