Anti-tearing rubber sealing ring for drilling operation

Abstract

The utility model relates to the technical field of sealing, in particular to an anti-tearing rubber sealing ring for drilling operation. Comprising a hard rubber ring, a soft rubber ring is concentrically bonded and fixed to one end of the hard rubber ring, an annular groove matched with a first flange in a sealing groove of an outer sleeve in a clamped mode is machined in the outer edge of the hard rubber ring, an inner ring concentric with the hard rubber ring is arranged in the hard rubber ring, an inner ring concentric with the soft rubber ring is arranged in the soft rubber ring, and the inner ring and the inner ring are fixedly connected through a plurality of connecting pieces. A second flange is machined on the inner edge of the hard rubber ring. According to the sealing ring, by arranging the inner ring, the connecting piece and the inner ring, the connecting strength of the hard rubber ring and the soft rubber ring can be improved, and the tear resistance of the sealing ring can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing technical field, more particularly to a kind of rubber sealing ring for drilling operation with anti-tearing. BACKGROUND

[0002] The rubber sealing ring is the main accessory of downhole tool, and plays an important role in sealing downhole tool. At present, in the production process, the sealing ring of part of downhole tool is only fixedly connected by bonding between soft and hard rubber, and the bonding strength is limited. During installation, due to the large mechanical force, the problem of tearing between the soft and hard rubber of the water supply and drainage sealing ring often occurs, which greatly affects the sealing effect.

[0003] The patent document with publication number CN217003077U discloses a kind of anti-tearing type automobile rubber sealing ring, and the reinforcing ring can guarantee the tensile resistance of sealing ring, and the outer wall of reinforcing ring is in the form of tooth groove piece, which makes the ductility of reinforcing ring better, can adapt to the deformation requirement of different caliber, and can prevent the anti-tearing performance of rubber sealing ring while deforming, greatly improves the service life of sealing ring. The technical scheme only sets reinforcing ring in the sealing ring to improve the anti-tearing performance of the sealing ring, but in the sealing ring combined with soft and hard rubber, the main problem of anti-tearing is the joint of soft and hard rubber.

[0004] The patent document with publication number CN202118247U discloses a kind of soft and hard double-layer anti-tearing sealing ring, and the sealing ring set in the cast pipe receiving port is an annular sealing ring integrated by soft rubber layer and hard rubber layer, and the soft rubber layer and the hard rubber layer are set to be relatively embedded into the matrix tooth surface or convex surface. By changing the shape of the hard rubber extrusion outlet type plate, the surface of the extruded hard rubber forms multiple or multiple (△, convex) convex lines, which increases the effective contact area between soft and hard rubber, greatly improves the adhesion of soft and hard rubber, and solves the quality problem caused by the tearing of soft and hard rubber by mechanical force. The anti-tearing strength of the sealing ring is weak by only increasing the bonding area to improve the connection strength of soft and hard rubber ring. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a kind of rubber sealing ring for drilling operation with anti-tearing, which can improve the connection structure strength of soft and hard rubber ring and has high anti-tearing strength.

[0006] In order to achieve the above purpose, the technical scheme provided by the utility model is:

[0007] The utility model provides a kind of anti-tearing rubber sealing ring for well drilling operation, including hard rubber ring, soft rubber ring is fixed with concentric bonding at one end of hard rubber ring, annular groove is processed with the first flange of the sealing groove in outer sleeve in the outer edge of hard rubber ring, inner ring is arranged with its concentric in hard rubber ring, inner ring is arranged with its concentric in soft rubber ring, and inner ring and inner ring are fixedly connected by multiple connecting sheets, and second flange is processed in the inner edge of hard rubber ring.

[0008] Specifically, a plurality of through holes are arranged on the inner ring in a circumferential direction.

[0009] Specifically, the inner edge of the soft rubber ring is an arc surface that is arc-shaped and protrudes towards the center of the soft rubber ring.

[0010] Specifically, the connecting sheet is an elastic sheet.

[0011] Specifically, an extrusion flange corresponding to the inner ring is processed on the outer edge of the soft rubber ring.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The sealing ring can increase the connection strength of the hard rubber ring and the soft rubber ring, and improve the anti-tearing performance of the sealing ring by arranging the inner ring, the connecting sheet and the inner ring.

[0014] 2. The sealing performance of the hard rubber ring and the inner tube can be improved by processing the second flange on the inner edge of the hard rubber ring.

[0015] 3. The strength of the connection structure of the hard rubber ring and the inner ring can be improved by arranging a plurality of through holes on the inner ring, so that part of the hard rubber ring can be located in the through hole after the hard rubber ring is cast on the outside of the inner ring.

[0016] 4. The sealing performance of the soft rubber ring and the inner tube can be improved by arranging the inner ring in the soft rubber ring, so that the part of the soft rubber ring on the inside of the inner ring is limited by the inner ring after the inner tube extrudes the soft rubber ring, and the pressure on the outer edge of the inner tube is improved.

[0017] 5. The extrusion force of the soft rubber ring on the outer sleeve can be improved after the inner tube extrudes the soft rubber ring by arranging the extrusion flange, so as to improve the sealing performance of the soft rubber ring and the outer sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the sealing ring.

[0019] Figure 2 is a schematic view of the cross-sectional structure of the sealing ring.

[0020] Figure 3 is a schematic view of the connection of the inner ring, the connecting sheet and the inner ring.

[0021] Figure 4The figure shows the sealing ring installed in the sealing groove of the outer sleeve.

[0022] Figure 5 The figure shows the inner tube connected with the outer sleeve.

[0023] Figure 6 The figure shows the extrusion flange on the outer edge of the soft rubber ring.

[0024] The parts in the figure are as follows: 1, hard rubber ring; 2, ring groove; 3, soft rubber ring; 4, second flange; 5, inner ring; 6, connecting piece; 7, inner ring; 8, outer sleeve; 9, inner tube; 10, first flange; 11, through hole; 12, extrusion flange. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0026] Embodiment one: refer to Figures 1-5 As shown in the figure, a rubber sealing ring for drilling operation is provided, which comprises a hard rubber ring 1, a soft rubber ring 3 fixedly connected to one end of the hard rubber ring 1 in a concentric manner, and a ring groove 2 formed on the outer edge of the hard rubber ring 1 and matched with a first flange 10 in a sealing groove of an outer sleeve 8. After the hard rubber ring 1 is installed in the sealing groove of the outer sleeve 8, the first flange 10 is located in the ring groove 2, and the matching of the first flange 10 and the ring groove 2 can limit the hard rubber ring 1.

[0027] The hard rubber ring 1 is provided with an inner ring 5 concentric with the hard rubber ring 1, and a plurality of through holes 11 are uniformly distributed on the circumference of the inner ring 5. After the hard rubber ring 1 is injection molded on the outer side of the inner ring 5, part of the hard rubber ring 1 can be located in the through holes 11, which can improve the strength of the connection structure of the hard rubber ring 1 and the inner ring 5.

[0028] The soft rubber ring 3 is provided with an inner ring 7 concentric with the soft rubber ring 3, and the inner ring 5 and the inner ring 7 are fixedly connected through a plurality of connecting pieces 6. Specifically, the connecting pieces 6 are elastic pieces.

[0029] After the soft rubber ring 3 is injection molded on the outer side of the inner ring 7 and the plurality of connecting pieces 6, the soft rubber ring 3 is fixedly connected with the hard rubber ring 1. By arranging the inner ring 5, the connecting pieces 6 and the inner ring 7, the connection strength of the hard rubber ring 1 and the soft rubber ring 3 can be increased, and the anti-tearing performance of the sealing ring can be improved.

[0030] The inner edge of the soft rubber ring 3 is an arc surface protruding in an arc shape towards the center of the soft rubber ring 3.

[0031] The inner edge of the hard rubber ring 1 is provided with a second flange 4.

[0032] By processing the second flange 4 on the inner edge of the hard rubber ring 1, the sealing performance of the hard rubber ring 1 and the inner tube 9 can be improved.

[0033] When the sealing ring is processed, the inner ring 5, the plurality of connecting pieces 6 and the inner ring 7 are fixedly connected together, the inner ring 5 is placed in the first mold, and then the hard rubber ring 1 is injection molded in the first mold, after the hard rubber ring 1 is injection molded, the inner ring 5 is located in the hard rubber ring 1. Then the plurality of connecting pieces 6 and the inner ring 7 are placed in the second mold, and the soft rubber ring 3 is injection molded in the second mold, after the soft rubber ring 3 is injection molded, the plurality of connecting pieces 6 and the inner ring 7 are located in the soft rubber ring 3.

[0034] After the outer sleeve 8 and the inner tube 9 are connected, the inner tube 9 and the outer sleeve 8 extrude the hard rubber ring 1 and the soft rubber ring 3, and the hard rubber ring 1 and the soft rubber ring 3 realize the sealing connection of the outer sleeve 8 and the inner tube 9.

[0035] The sealing ring can also be suitable for the sealing connection of the relative sliding of the outer sleeve 8 and the inner tube 9.

[0036] Example two: on the basis of example one, referring to Figure 6 As shown in the figure, the outer edge of the soft rubber ring 3 is processed with an extrusion flange 12 corresponding to the inner ring 7.

[0037] By setting the extrusion flange 12, after the inner tube 9 extrudes the soft rubber ring 3, the extrusion force of the soft rubber ring 3 on the outer sleeve 8 can be improved, and the sealing performance of the soft rubber ring 3 and the outer sleeve 8 can be improved.

[0038] The above only describes the preferred embodiments of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A kind of anti-tearing rubber sealing ring for drilling operation, comprising hard rubber ring (1), soft rubber ring (3) is fixed with concentrically bonded at one end of hard rubber ring (1), annular groove (2) is processed with the first flange (10) of the sealing groove in outer sleeve (8) in the outer edge of hard rubber ring (1), it is characterized in that, The hard rubber ring (1) is provided with an inner ring (5) concentric with the hard rubber ring (1), and the soft rubber ring (3) is provided with an inner ring (7) concentric with the soft rubber ring (3), the inner ring (5) and the inner ring (7) are fixedly connected through a plurality of connecting pieces (6), and the inner edge of the hard rubber ring (1) is provided with a second flange (4).

2. The anti-tear rubber seal ring for drilling operations as claimed in claim 1, wherein, A plurality of through holes (11) are arranged on the inner ring (5) in a circumferential distribution.

3. The anti-tear rubber seal ring for drilling operations as claimed in claim 1, wherein, The inner edge of the soft rubber ring (3) is an arc surface that is arc-shaped and protrudes towards the center of the soft rubber ring (3).

4. The anti-tear rubber seal ring for drilling operations as claimed in claim 1, wherein, The connecting piece (6) is an elastic piece.

5. The anti-tear rubber seal ring for drilling operations as claimed in claim 1, wherein, The outer edge of the soft rubber ring (3) is provided with an extrusion flange (12) corresponding to the inner ring (7).

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