Coiled tubing tractor

Abstract

A coiled tubing tractor relates to the technical field of oilfield downhole tools, the right end of the coiled tubing is sleeved with a positioning sleeve, an outer taper sleeve and an inner taper head are installed in the right port of the coiled tubing, a stud is processed on the right side of the inner taper head, the stud extends out of the positioning sleeve to connect a conversion sleeve, the conversion sleeve is welded by a left blocking plate, a steel pipe and a right blocking plate, the left blocking plate is provided with a center hole, and the stud extends into the left blocking plate to connect a nut.The beneficial effects of the utility model are that a rotating sleeve is arranged between the steel wire joint and the conversion sleeve, the rotating sleeve cooperates with the pin shaft to play the role of a universal joint, when the coiled tubing is pulled, the rotation and bending of the steel wire rope will not affect the coiled tubing, the problem that the rotation of the steel wire rope affects the coiled tubing when the load changes is solved, the positioning sleeve is blocked outside the outer taper sleeve, so that when the nut is tightened and the inner taper head moves outward, the outer taper sleeve can only expand outward to press the coiled tubing, and the positioning sleeve also plays the role of improving the pulling force.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield downhole tool technology field especially relates to a continuous oil pipe tractor. BACKGROUND

[0002] The announcement number CN201110233875.2 discloses a continuous oil pipe tractor, including the steel wire rope that can be connected with the continuous oil pipe,

[0003] The continuous oil pipe is provided with the inner cone sleeve in the continuous oil pipe, the outer cone sleeve is arranged between the inner cone sleeve and the inner wall of the continuous oil pipe, the end of the inner cone sleeve is provided with the screw rod, the screw rod is provided with the nut, the nut can compress the outer cone sleeve and the inner cone sleeve, the screw rod is detachably connected with the steel wire rope, through the cooperation of the inner cone sleeve and the outer cone sleeve, the outer wall of the outer cone sleeve can be pushed to be closely connected with the inner wall of the continuous oil pipe by the inner cone sleeve, and the degree of combination of the inner cone sleeve and the outer cone sleeve can be adjusted by the cooperation of the screw rod and the nut acting on the inner and outer cone sleeves, the tightness of the outer cone sleeve and the continuous oil pipe is adjusted according to the size of the pulling force, so that the continuous oil pipe tractor is closely connected with the continuous oil pipe, and physical damage to the continuous oil pipe is avoided at the same time.

[0004] In actual use, due to the characteristics of the steel wire rope, the steel wire rope will twist when the load changes, and the process of pulling the continuous oil pipe by the steel wire rope will cause the continuous oil pipe to generate torsion, or make the continuous oil pipe twist and deform, or cause the steel wire rope to break and be damaged due to the load change. TECHNICAL SOLUTION

[0005] In order to solve the problem of incoordination between the continuous oil pipe and the steel wire rope during the current continuous oil pipe traction, the utility model provides a continuous oil pipe tractor.

[0006] The utility model provides a technical scheme: a continuous oil pipe tractor, including continuous oil pipe, the right end of continuous oil pipe is sleeved with positioning sleeve, the right end of continuous oil pipe is installed with outer cone sleeve and inner cone head, the inner hole of outer cone sleeve is consistent with the conical angle of inner cone head, the outer circle of outer cone sleeve is consistent with the size of the inner hole of continuous oil pipe, outer cone sleeve is composed of at least three conical blocks, and the gap is left between adjacent conical blocks, the positioning sleeve is blocked at the right side of outer cone sleeve and continuous oil pipe, the right side of inner cone head is processed with stud, the stud is connected conversion sleeve after extending positioning sleeve, conversion sleeve is welded together by left baffle, steel pipe and right baffle, the left baffle is opened with center hole, the stud is connected nut after extending left baffle, the number of nut is two.

[0007] The right side of conversion sleeve is welded with shaft, the shaft is rotatably connected with rotating sleeve through bearing, gland and shaft retaining ring, the rotating sleeve is rotatably connected with steel rope joint through pin shaft and split pin, the pin shaft is vertically arranged with rotating sleeve, and the steel rope joint is fixedly connected with steel wire rope.

[0008] The positioning sleeve is connected with the continuous oil pipe in interference fit.

[0009] The steel pipe has windows cut into its wall.

[0010] The beneficial effects of this utility model are as follows: A rotating sleeve is set between the steel rope joint and the conversion sleeve. The rotating sleeve cooperates with the pin to act as a universal joint. When the coiled tubing is pulled, the rotation and bending of the steel wire rope will not affect the coiled tubing. This solves the problem that the rotation of the steel wire rope affects the coiled tubing when the load changes. The positioning sleeve is placed on the outside of the outer cone sleeve, so that when the nut is tightened, the inner cone head moves outward, and the outer cone sleeve can only expand outward to press the coiled tubing. The positioning sleeve also plays a role in increasing the pulling force. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Appendix Figure 2 It is attached Figure 1 AA cross-section view;

[0013] Appendix Figure 3 This is a schematic diagram of the structure of the conversion sleeve in this utility model;

[0014] Appendix Figure 4 It is attached Figure 1 BB cross-section.

[0015] In the diagram, 1-coiled tubing, 2-inner cone head, 3-outer cone sleeve, 31-conical block, 4-positioning sleeve, 5-conversion sleeve, 51-left blocking plate, 52-steel pipe, 53-right blocking plate, 54-window, 6-nut, 7-shaft, 8-rotating sleeve, 9-steel rope joint, 10-steel wire rope, 11-pin, 12-gland, 13-stud. Detailed Implementation

[0016] like Figures 1 to 4 As shown, a coiled tubing traction device includes a coiled tubing 1, a positioning sleeve 4 fitted at the right end of the coiled tubing 1, an outer conical sleeve 3 and an inner conical head 2 installed inside the right port of the coiled tubing 1, the inner hole of the outer conical sleeve 3 having the same conical angle as the inner conical head 2, the outer circle of the outer conical sleeve 3 having the same size as the inner hole of the coiled tubing 1, the outer conical sleeve 3 being composed of at least three conical blocks 31, with a gap between adjacent conical blocks 31, the positioning sleeve 4 blocking the outer conical sleeve 3 and the right side of the coiled tubing 1, a stud 13 machined on the right side of the inner conical head 2, the stud 13 extending out of the positioning sleeve 4 and connecting to a conversion sleeve 5, the conversion sleeve 5 being welded from a left blocking plate 51, a steel pipe 52 and a right blocking plate 53, the left blocking plate 51 having a central hole, the stud 13 extending into the left blocking plate 51 and connecting to a nut 6, the number of nuts 6 being two, after installation, the two nuts 6 being tightened together to prevent loosening;

[0017] The shaft 7 is welded on the right side of the conversion sleeve 5, the shaft 7 is rotatably connected with the rotating sleeve 8 through the bearing, the gland 12 and the shaft retainer, the rotating sleeve 8 is rotatably connected with the steel rope joint 9 through the pin shaft 11 and the cotter pin, the pin shaft 11 is arranged perpendicularly to the rotating sleeve 8, and the steel rope joint 9 is fixedly connected with the steel wire rope 10.

[0018] The rotating sleeve 8 is arranged between the steel rope joint 9 and the conversion sleeve 5, the rotating sleeve 8 cooperates with the pin shaft 11 to play the role of the universal joint, when the coiled tubing 1 is pulled, the rotation and bending of the steel wire rope 10 will not affect the coiled tubing 1, and the problem that the rotation of the steel wire rope 10 affects the coiled tubing 1 when the load changes is solved.

[0019] The positioning sleeve 4 is connected with the coiled tubing 1 in an interference fit, during installation, the positioning sleeve 4 is sleeved on the coiled tubing 1 through hot mounting, the positioning sleeve 4 is blocked outside the outer cone sleeve 3, so that when the nut 6 is tightened and the inner cone head 2 moves outward, the outer cone sleeve 3 can only expand outward to press the coiled tubing 1, and the positioning sleeve 4 also plays the role of improving the pulling force.

[0020] The window 54 is formed in the pipe wall of the steel pipe 52, and is used for extending into the wrench to tighten the nut 6.

Claims

1. A coiled tubing tractor comprising a coiled tubing (1), characterized in that: The right end of the coiled tubing (1) is sleeved with a positioning sleeve (4), and an outer taper sleeve (3) and an inner taper head (2) are installed in the right end port of the coiled tubing (1), the inner hole of the outer taper sleeve (3) is consistent with the conical angle of the inner taper head (2), the outer circle of the outer taper sleeve (3) is consistent with the inner hole size of the coiled tubing (1), the outer taper sleeve (3) is composed of at least three conical blocks (31), gaps are left between adjacent conical blocks (31), the positioning sleeve (4) is blocked between the outer taper sleeve (3) and the right side of the coiled tubing (1), the right side of the inner taper head (2) is processed with a stud (13), the stud (13) extends out of the positioning sleeve (4) to connect a conversion sleeve (5), the conversion sleeve (5) is welded by a left blocking plate (51), a steel pipe (52) and a right blocking plate (53), the left blocking plate (51) is opened with a center hole, the stud (13) is connected with a nut (6) after extending into the left blocking plate (51), and the number of the nut (6) is two; The right side of the conversion sleeve (5) is welded with a shaft (7), the shaft (7) is rotationally connected with a rotating sleeve (8) through a bearing, a gland (12) and a shaft retainer, the rotating sleeve (8) is rotationally connected with a steel rope joint (9) through a pin shaft (11) and a split pin, the pin shaft (11) is arranged vertically with the rotating sleeve (8), and the steel rope joint (9) is fixedly connected with a steel wire rope (10).

2. A coiled tubing tractor according to claim 1, characterized in that: The positioning sleeve (4) is connected with the coiled tubing (1) in interference fit.

3. The coiled tubing tractor of claim 1, wherein: The pipe wall of the steel pipe (52) is opened with a window (54).

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