Centralizing and resistance reducing device applied to pipe penetrating in pipe

Abstract

The utility model discloses a righting and resistance reducing device applied to pipe penetration in a pipe, and relates to the technical field of moving devices for pipe penetration in the pipe, the righting and resistance reducing device comprises a righting cylinder, the righting cylinder comprises a cylinder main body, an internal thread groove, a conical clamping groove, an external thread groove and a sleeve joint ring groove, the cylinder main body is connected with a righting assembly through the internal thread groove and the conical clamping groove, and the sleeve joint ring groove is connected with the righting assembly. The righting assembly is used for providing righting operation for the inner pipe; the cylinder body is connected with a resistance reduction assembly through the outer thread groove and the sleeving ring groove, and the resistance reduction assembly is used for making contact with the inner wall of the outer pipe and used for reducing moving resistance generated when the inner pipe and the outer pipe move relative to each other. According to the centralizer, the centralizing assembly and the resistance reducing assembly are arranged, inner pipes with different outer diameters can be centralized by changing trapezoidal centralizing blocks with different heights, and the effect of reducing the frictional resistance of the inner pipes entering the outer pipe can be achieved through rolling of the steel balls and the inner wall of the outer pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the mobile device technology field of pipe inside pipe, specifically is a kind of righting and drag reduction device applied to pipe inside pipe. BACKGROUND

[0002] When laboratory, oilfield downhole laboratory will often encounter the situation of putting downhole tool or tubular into casing, general experiment is first to lay casing on ground, then manually first the tail end of downhole tool is placed into the upper portion of casing, and then the tool is pushed to the experimental position by pushing the upper end of downhole tool, if when downhole tool is lighter, this method is relatively easy to realize, but when encountering slightly heavy downhole tool, it is more laborious, and after tool enters into casing, because there is no righting, the situation of downhole tool tail end not centering can occur, so it can adversely affect experiment, or even lead to experiment to draw wrong conclusion;

[0003] Therefore, a righting and drag reduction device applied to pipe inside pipe is provided, which places the tail end of inner pipe on the device first, and then places it on the upper portion of outer pipe, and pushes the inner pipe to smoothly push the inner pipe into the casing. UTILITY MODEL CONTENTS

[0004] The utility model discloses a righting and drag reduction device applied to pipe inside pipe.

[0005] To achieve the above object, the utility model provides the following technical scheme: a righting and drag reduction device applied to pipe inside pipe, including righting cylinder, the righting cylinder includes cylinder main body, internal thread groove, taper clamping groove, external thread groove, sleeve joint ring groove, the internal thread groove is formed in cylinder main body top inside, the taper clamping groove is formed in cylinder main body inside and the top of taper clamping groove is communicated with internal thread groove, the cylinder main body is connected with righting assembly through internal thread groove, taper clamping groove, the righting assembly is used to provide righting operation for inner pipe.

[0006] The external thread groove is formed in cylinder main body bottom outside, the sleeve joint ring groove is formed in cylinder main body outside and is located above external thread groove, the cylinder main body is connected with drag reduction assembly through external thread groove, sleeve joint ring groove, and the drag reduction assembly is used to contact with the inner wall of outer pipe, to reduce the moving resistance when inner pipe and outer pipe move mutually.

[0007] As a further scheme of the utility model: the righting assembly includes trapezoidal righting block, T-shaped pressing cap.

[0008] The conical clamping slots are uniformly arranged in a circular shape with the center of the cylinder body as the center, the number of the trapezoidal righting blocks matches the number of the conical clamping slots, and the trapezoidal righting blocks are vertically inserted into the inner side of the conical clamping slots, and the T-shaped pressing cap is threadedly connected to the inner side of the internal thread groove and tightly abuts against the top of the trapezoidal righting block, so as to fix the plurality of trapezoidal righting blocks.

[0009] The inner side of the plurality of trapezoidal righting blocks matches the outer diameter of the inner pipe, and the inner side of the trapezoidal righting block abuts against the outer wall of the inner pipe, so as to right the inner pipe.

[0010] As a further scheme of the utility model: the drag reduction assembly includes a blocking sleeve, a steel ball and a bottom cap.

[0011] The blocking sleeve is sleeved on the sleeve ring groove and the outer side of the cylinder body, and the bottom cap is threadedly connected to the outer thread groove and abuts against the bottom of the blocking sleeve, so as to fix the blocking sleeve.

[0012] The steel ball is distributed between the cylinder body and the blocking sleeve and penetrates the blocking sleeve to protrude to the outside of the blocking sleeve, and the rotation of the steel ball realizes the effect of reducing the frictional resistance when the relative movement occurs.

[0013] As a further scheme of the utility model: the vertical ball groove is provided at the position where the cylinder body contacts the steel ball, and the vertical ball groove penetrates the sleeve ring groove and communicates with the outer thread groove.

[0014] The blocking sleeve is provided with a spherical hole at the position where the blocking sleeve contacts the steel ball.

[0015] As a further scheme of the utility model: a plurality of vertical ball grooves are provided along the circumferential direction, a plurality of steel balls are vertically distributed in each vertical ball groove, and the number and position of the spherical holes correspond to the number and position of the steel balls.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] By arranging the righting assembly and the drag reduction assembly, the trapezoidal righting blocks with different heights can be exchanged to right the inner pipe with different outer diameters, and the rolling of the steel ball and the inner wall of the outer pipe can reduce the frictional resistance of the inner pipe entering the outer pipe. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The structure of the utility model is shown in the figure;

[0019] Fig. 2 The structure of the righting cylinder and the outer pipe in the butt joint state of the utility model is shown in the sectional view;

[0020] Fig. 3The structure section view of the righting cylinder and the inner pipe sleeve connection state of the utility model;

[0021] Fig. 4 The whole structure section view of the righting cylinder, the righting group and the drag reduction assembly of the utility model;

[0022] Fig. 5 The section view split drawing of the righting cylinder, the righting group and the drag reduction assembly of the utility model.

[0023] In the drawing: 1, righting cylinder; 101, cylinder main body; 102, internal thread groove; 103, conical clamping groove; 104, external thread groove; 105, sleeve connection ring groove; 106, vertical ball groove; 2, righting assembly; 201, trapezoidal righting block; 202, T-shaped pressing cap; 3, drag reduction assembly; 301, blocking sleeve; 302, spherical hole; 303, steel ball; 304, bottom cap; 4, inner pipe; 5, outer pipe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figs. 1-5 In the embodiments of the utility model, a righting and drag reduction device applied to pipe-through pipe includes a righting cylinder 1, the righting cylinder 1 includes a cylinder main body 101, an internal thread groove 102, a conical clamping groove 103, an external thread groove 104 and a sleeve connection ring groove 105, the internal thread groove 102 is formed on the inner side of the top of the cylinder main body 101, the conical clamping groove 103 is formed on the inner side of the cylinder main body 101, and the top of the conical clamping groove 103 is communicated with the internal thread groove 102, the cylinder main body 101 is connected with a righting assembly 2 through the internal thread groove 102 and the conical clamping groove 103, and the righting assembly 2 is used for providing righting operation for an inner pipe 4;

[0026] The external thread groove 104 is formed on the outer side of the bottom of the cylinder main body 101, the sleeve connection ring groove 105 is formed on the outer side of the cylinder main body 101 and located above the external thread groove 104, and the cylinder main body 101 is connected with a drag reduction assembly 3 through the external thread groove 104 and the sleeve connection ring groove 105, the drag reduction assembly 3 is used for contacting with the inner wall of an outer pipe 5 and reducing the moving resistance when the inner pipe 4 and the outer pipe 5 move relative to each other;

[0027] The righting assembly 2 includes a trapezoidal righting block 201 and a T-shaped pressing cap 202;

[0028] The three cone clamping grooves 103 are evenly arranged in a ring shape with the center of the cylinder body 101 as the center, the number of the trapezoidal righting blocks 201 matches the number of the cone clamping grooves 103, and the trapezoidal righting blocks 201 are vertically inserted into the inner side of the cone clamping grooves 103, the T-shaped pressing cap 202 is threadedly connected to the inner side of the inner thread groove 102 and tightly abuts against the top of the trapezoidal righting block 201, so as to fix the plurality of trapezoidal righting blocks 201;

[0029] The inner side of the plurality of trapezoidal righting blocks 201 matches the outer diameter of the inner tube 4, the inner side of the trapezoidal righting block 201 abuts against the outer wall of the inner tube 4, so as to right the inner tube 4;

[0030] The drag reduction assembly 3 comprises a blocking sleeve 301, a steel ball 303 and a bottom cap 304.

[0031] The blocking sleeve 301 is sleeved on the sleeve ring groove 105 and the outer side of the cylinder body 101, the bottom cap 304 is threadedly connected to the outer thread groove 104 and abuts against the bottom of the blocking sleeve 301, so as to fix the blocking sleeve 301;

[0032] The steel ball 303 is distributed between the cylinder body 101 and the blocking sleeve 301 and protrudes to the outside of the blocking sleeve 301 through the blocking sleeve 301, the rotation of the steel ball 303 reduces the moving friction when the relative movement occurs.

[0033] In the embodiment, the use method of the device is as follows:

[0034] First, the outer tube 5 is placed horizontally on the ground, then the tail of the inner tube 4 is inserted into the righting cylinder 1, the tail of the inner tube 4 abuts against the inner side of the plurality of trapezoidal righting blocks 201 in the cylinder body 101, and the plurality of trapezoidal righting blocks 201 right the inner tube 4 (it should be noted that the inner side of the trapezoidal righting block 201 can be machined to different sizes to adapt to different outer diameters of the inner tube 4, so as to right the inner tube 7 with different diameters);

[0035] Then, the device and the tail of the inner tube 4 are inserted into the outer tube 5, in this process, the steel ball 303 abuts against the inner wall of the outer tube 5, and the steel ball 303 can rotate freely, when the inner tube 4 is pushed, the friction between the trapezoidal righting block 201 and the inner tube 4 is greater than the friction between the steel ball 303 and the inner wall of the outer tube 5, so that the inner tube 4 is more easily inserted into the outer tube 5;

[0036] It should be noted that the device can be used alone or in combination with multiple devices, and the use flexibility is strong.

[0037] Please refer to Figs. 1-4The vertical ball groove 106 is provided with a plurality of vertical ball grooves 106 in the circumferential direction, and a plurality of steel balls 303 are distributed in the vertical direction inside the single vertical ball groove 106.

[0038] The spherical hole 302 is provided at the position where the baffle sleeve 301 contacts the steel ball 303.

[0039] The vertical ball groove 106 is provided with a plurality of vertical ball grooves 106 in the circumferential direction, and a plurality of steel balls 303 are distributed in the vertical direction inside the single vertical ball groove 106.

[0040] In the embodiment, the cooperation of the vertical ball groove 106 and the spherical hole 302 can only make the steel ball 2 rotate, the outer diameter of the plurality of annularly distributed steel balls 3 is greater than the outer diameter of the baffle sleeve 5 and matches the inner diameter of the outer pipe 5, when the inner pipe 4 and the outer pipe 5 move relatively, the steel balls 3 can greatly reduce the movement resistance, thereby playing a role of reducing resistance.

[0041] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme and the utility model concept of the utility model, equivalent replacement or change, should be covered in the protection scope of the utility model.

Claims

1. A righting and drag reducing device applied to a pipe running through a pipe, comprising a righting cylinder (1), characterized in that, The righting cylinder (1) includes a cylinder body (101), an internal thread groove (102), a tapered clamping groove (103), an external thread groove (104), and a sleeve ring groove (105). The internal thread groove (102) is formed on the inner side of the top of the cylinder body (101). The tapered clamping groove (103) is formed on the inner side of the cylinder body (101), and the top of the tapered clamping groove (103) is in communication with the internal thread groove (102). The cylinder body (101) is connected with a righting assembly (2) through the internal thread groove (102) and the tapered clamping groove (103). The righting assembly (2) is used for providing righting operation for an inner pipe (4). The external thread groove (104) is formed on the outer side of the bottom of the cylinder body (101). The sleeve ring groove (105) is formed on the outer side of the cylinder body (101) and above the external thread groove (104). The cylinder body (101) is connected with a drag reduction assembly (3) through the external thread groove (104) and the sleeve ring groove (105). The drag reduction assembly (3) is used for contacting the inner wall of an outer pipe (5) and reducing the moving resistance of the inner pipe (4) when moving relative to the outer pipe (5).

2. The centralizing drag-reducing device for use in pipe- through-pipe according to claim 1, characterized in that, The righting assembly (2) includes trapezoidal righting blocks (201) and T-shaped pressing caps (202). The tapered clamping groove (103) is annularly and uniformly provided with three tapered clamping grooves with the center of the cylinder body (101) as the center. The number of the trapezoidal righting blocks (201) matches the number of the tapered clamping grooves (103). The trapezoidal righting blocks (201) are vertically inserted into the inner side of the tapered clamping grooves (103). The T-shaped pressing caps (202) are threadedly connected to the inner side of the internal thread groove (102) and tightly abut the top of the trapezoidal righting blocks (201), so as to fix the plurality of trapezoidal righting blocks (201). The inner side of the plurality of trapezoidal righting blocks (201) has a diameter matching the outer diameter of the inner pipe (4). The inner side of the trapezoidal righting blocks (201) abuts the outer wall of the inner pipe (4), so as to right the inner pipe (4).

3. The centralizing drag-reducing device for use in pipe- through-pipe according to claim 1, characterized in that, The drag reduction assembly (3) includes a blocking sleeve (301), a steel ball (303), and a bottom cap (304). The blocking sleeve (301) is sleeved on the sleeve ring groove (105) and the outer side of the cylinder body (101). The bottom cap (304) is threadedly connected to the external thread groove (104) and abuts the bottom of the blocking sleeve (301), so as to fix the blocking sleeve (301). The steel ball (303) is distributed between the cylinder body (101) and the blocking sleeve (301) and protrudes to the outside of the blocking sleeve (301) through the blocking sleeve (301). The steel ball (303) contacts the inner wall of the outer pipe (5) and rotates to reduce the moving resistance when moving relative to the outer pipe (5).

4. The centralizer and drag-reducing device for use in pipe running according to claim 3, characterized in that, A vertical ball groove (106) is formed at the position where the cylinder body (101) contacts the steel ball (303). The vertical ball groove (106) penetrates the sleeve ring groove (105) and is in communication with the external thread groove (104). A spherical hole (302) is formed at the position where the blocking sleeve (301) contacts the steel ball (303).

5. A centralizing drag-reducing device for use in pipe- through-pipe applications according to claim 4, characterized in that, The vertical ball grooves (106) are arranged in a plurality of circumferential directions, and a plurality of steel balls (303) are distributed in the vertical direction inside each of the vertical ball grooves (106), and the number and position of the spherical holes (302) and the number and position of the steel balls (303) are one-to-one corresponding.

Images