Fishing tool for rod and rope fallen objects

Abstract

The utility model relates to a fishing tool for falling objects such as rods and ropes, and belongs to the technical field of underground operation of oil fields. The fishing tool comprises an upper connector, a rotating mechanism, a limiting tray and a fishing spear rod which are sequentially connected from top to bottom, the rotating mechanism is used for driving the fishing spear rod to rotate and wind falling objects, and a plurality of shifting hooks distributed up and down are arranged on the outer wall of the fishing spear rod. The utility model solves the problem of low fishing success rate caused by factors such as larger inner diameter of a sleeve, large well deviation of a fishing well section, difficulty in torque transmission at an inflection point and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of rod, rope fallen object fishing tools, belong to oilfield downhole operation technical field. BACKGROUND

[0002] With oilfield development into middle and later period, part of oil production unit enters secondary oil production stage. To effectively improve oil recovery, high angle deviated well, horizontal well proportion increases year by year. Affected by well inclination, pipe string eccentric wear, pipe string falling well and other conditions occur from time to time, after pipe string falls well, sucker rod fish top leans to the side of casing. At present, commonly used sucker rod, rope fishing tool is mainly conventional outer hook, loose-leaf outer hook, three-ball fisher etc., Chinese invention patent application number 202123442363.5 discloses a split type steel wire cable fishing outer hook, including fishing rod and several outer hooks fixedly connected on fishing rod, the length of several outer hooks is not equal;It also includes joint, the inner thread is provided at both ends of joint, the inner thread of one end of joint is used for being connected with fishing rod, the inner thread of other end of joint is used for threadedly connecting fishing pipe string, pressure disc is provided on joint. The technical scheme provided by the utility model can solve the problem that the steel wire cable on the upper layer of fallen fish is easy to break. However, existing fishing tool is affected by factors such as larger casing inner diameter, fishing well section well inclination, difficulty in torque transmission at inflection point, and has low fishing success rate, and fish top is easy to damage, which affects subsequent construction. To effectively solve such problems, it is urgent to develop a high angle deviated well, horizontal well casing inner rod, rope special fishing tool. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a kind of rod, rope fallen object fishing tools, solve the problem of low fishing success rate caused by factors such as larger casing inner diameter, fishing well section well inclination, difficulty in torque transmission at inflection point.

[0004] The technical scheme adopted by the utility model is a kind of rod, rope fallen object fishing tools, including upper joint, rotating mechanism, limit tray, fishing spear rod connected in sequence from top to bottom, the rotating mechanism is used to drive fishing spear rod to rotate and wind fallen object, fishing spear rod outer wall is equipped with several upper and lower distribution's hook.

[0005] Further, the hook opening is towards the direction where the limit tray is located, and the opening gradually decreases from outside to inside.

[0006] Further, the rotating mechanism includes a slide rod, a safety sliding block, and an inner sliding sleeve. One end of the slide rod extends into the inner sliding sleeve, and the slide rod can slide on the inner wall of the inner sliding sleeve. The outer wall of the slide rod is evenly provided with a reversing groove. One end of the safety sliding block is connected with the inner sliding sleeve, and the other end of the safety sliding block extends into the reversing groove of the slide rod.

[0007] Further, a plurality of water eyes are symmetrically arranged on the outer wall of the inner sliding sleeve.

[0008] Further, the upper joint is connected with the slide rod by screwing.

[0009] Further, the hook includes hook tip A and hook tip B, and the interval between the adjacent hook tip A and the adjacent hook tip B is the same.

[0010] Further, the middle points of the contact surface between the several hook tip A and the harpoon rod are on the same straight line A, the middle points of the contact surface between the several hook tip B and the harpoon rod are on the same straight line B, and the straight line A, the straight line B and the straight line C are arranged on the outer hook rod.

[0011] Further, the reversing groove includes a long radial groove, a V groove and a short oblique groove, the long radial groove extends to one end of the V groove along the radial direction of the slide rod, the two ends of the V groove are communicated with the long radial groove and the short oblique groove respectively, and the other end of the short oblique groove is communicated with another long radial groove.

[0012] Further, the included angle in the V groove is the same as the included angle between the short oblique groove and the long radial groove.

[0013] Further, the included angle in the V groove is 30°, and the included angle between the short oblique groove and the long radial groove is 30°.

[0014] Further, the width of the groove of the reversing groove is greater than the width of the safety sliding block, so that the safety sliding block can freely slide and reverse in the long radial groove, the V groove and the short oblique groove.

[0015] The utility model discloses a rod and rope falling object fishing tool, which has the beneficial effects that the slide rod and the safety sliding block freely slide in the reversing groove, torque transmission in different states is realized, when the fishing tool is lifted up and lowered, the safety sliding block slides in different directions, drives the inner sliding sleeve to rotate, further drives the internally connected harpoon rod to rotate, automatic rotation design provides better winding effect and gripping force, ensures effective fishing of the falling object, through the optimized safety sliding block sliding mechanism, the design that the opening of the hook faces the direction where the limiting tray is located and the opening gradually becomes smaller from outside to inside, multi-angle rotation and automatic winding are realized, and firm gripping of the fishing tool on the rod or rope falling object in the fishing process is ensured. The utility model can adapt to complex well inclination conditions, simultaneously reduces torque transmission difficulty, and increases the success rate of fishing. ACCURACY

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without paying the creative labor.

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the reversing groove of the slide rod of the present utility model;

[0019] Figure 3 for Figure 1 Schematic diagram of the middle AA section;

[0020] Figure 4 It is a schematic diagram of the limiting tray and the spear rod when viewed from above.

[0021] In the figure: 1. Upper joint; 2. Slide rod; 3. Reversing groove; 4. Safety slider; 5. Inner sleeve; 6. Water eye; 7. Limit tray; 8. Spear rod; 9. Hook tip A; 10. Hook tip B; 11. Long radial groove; 12. V groove; 13. Short oblique groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. 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.

[0023] In order to further understand the content of the invention of the utility model, the utility model is further explained below in conjunction with specific implementation methods.

[0024] Example 1: Figures 1-4 As shown, this embodiment provides a rod-type or rope-type fallen object salvage tool, comprising an upper joint 1, a rotating mechanism, a limiting tray 7, and a spear rod 8 connected in sequence from top to bottom. The rotating mechanism is used to drive the spear rod 8 to rotate and wrap around the fallen object, and the outer wall of the spear rod 8 is provided with a plurality of up-and-down distributed pull hooks. In this embodiment, the pull hook opening faces the direction where the limiting tray 7 is located, and the opening gradually decreases from the outside to the inside. The pull hook includes a hook tip A9 and a hook tip B10, and the spacing between adjacent hook tips A9 and adjacent hook tips B10 is the same. The midpoints of the contact surfaces of the several hook tips A9 and the spear rod 8 are on the same straight line A, and the midpoints of the contact surfaces of the several hook tips B10 and the spear rod 8 are on the same straight line B. The straight line A, straight line B, and straight line C are evenly distributed on the outer hook rod.

[0025] The rotating mechanism includes a slide rod 2, a safety slider 4, and an inner sleeve 5. One end of the slide rod 2 extends into the inner sleeve 5 and can slide on the inner wall of the inner sleeve 5. The other end of the slide rod 2 is connected to the upper joint 1 by a thread. The outer wall of the slide rod 2 is uniformly provided with a reversing groove 3, which is four connected "L-shaped" grooves. The reversing groove 3 includes a long radial groove 11, a V-groove 12, and a short oblique groove 13. The long radial groove 11 extends radially along the slide rod 2 to one end of the V-groove 12. The two ends of the V-groove 12 are respectively connected to the long radial groove 11 and the short oblique groove 13. The other end of the short oblique groove 13 is connected to another long radial groove 11. The internal angle of the V-groove 12 is 30 degrees. The angle between the short oblique groove 13 and the long radial groove 11 is also 30 degrees. One end of the safety slider 4 is connected to the inner sleeve 5, and the other end of the safety slider 4 extends into the reversing groove 3 of the slide rod 2. The groove width of the reversing groove 3 is greater than the width of the safety slider 4, ensuring that the safety slider 4 can freely slide and reverse in the long radial groove 11, the V groove 12, and the short oblique groove 13.

[0026] In actual application, first, connect the upper joint 1 to the drilling tool, use the fishing tool string to transport the fishing tool downward, pull the hook into the rope-like fallen object, use the lifting and lowering pipe string to realize the fishing tool rotation at the bottom of the well, lift and lower once, it can automatically rotate 90 degrees, specifically, the safety slider 4 can slide in the reversing groove 3 on the outer surface of the slide rod 2, the safety slider 4 uses the bottom of the long radial groove 11 of the reversing groove 3 of the slide rod 2 to slide upward, slide into the V-groove 12, and the safety slider 4 slides along the inner wall of the reversing groove 3 into the bottom of the V-groove 12 The safety slider 4 slides into the short oblique groove 13 along the inner wall of the reversing groove 3, and then slides into the long radial groove 11 along the short oblique groove 13, so that the inner sleeve 5 of the pipe string rotates 90° after lifting and lowering once. By lifting and lowering four times, the inner sleeve 5 rotates 360°. By analogy, multiple rotations of the inner sleeve 5 can be completed through multiple lifting and lowering, thereby driving the spear rod 8 to rotate, and the hook tip tightly wraps the rope-like objects, ensuring that the rope-like objects can be salvaged and are not easily dropped into the well during the lifting process, thereby achieving successful salvage of rope-like objects.

[0027] Example 2: Figures 1-4 As shown, based on Example 1, two water holes 6 are axially symmetrically arranged on the outer wall of the inner sliding sleeve 5. Liquid can flow to the water holes 6 through the interior of the slide rod 2, thereby realizing circulating well washing.

[0028] The upper joint 1 is connected with a drilling tool, the fishing tool string is sent downward by using a fishing tool string, the fishhook is hooked into a rod type fish, the fishing tool string is lifted and lowered to realize the rotation of the fishing tool string at the well bottom, the fishing tool string is lifted and lowered once to automatically rotate 90 degrees, specifically, the safety sliding block 4 can slide in the reversing groove 3 on the outer surface of the slide rod 2, the safety sliding block 4 slides upward by using the long diameter groove 11 at the bottom of the reversing groove 3 of the slide rod 2, slides into the V-shaped groove 12, the safety sliding block 4 slides into the bottom of the V-shaped groove 12 along the inner wall of the reversing groove 3, then the coiled tubing fishing string is lowered again, the safety sliding block 4 slides into the short oblique groove 13 along the inner wall of the reversing groove 3, then slides into the long diameter groove 11 along the short oblique groove 13, the inner sliding sleeve 5 is rotated 90 degrees by lifting and lowering the string once through the design of the reversing groove 3, the inner sliding sleeve 5 is rotated 360 degrees by lifting and lowering the string four times, and the inner sliding sleeve 5 is rotated multiple times through the lifting and lowering multiple times, so as to drive the fish spear rod 8 to rotate, wind the rod type fish into the fishhook, and the fishhook opening faces upward and the opening degree gradually decreases from outside to inside, the rod type fish cannot be pulled out in the reverse direction after being introduced, the fished fish is prevented from falling into the well again in the lifting process, and the successful fishing of the rod type fish in the casing is realized.

[0029] The fishing tool has the advantages of simple structure, strong applicability, and being especially suitable for high-inclination wells and horizontal wells in well repairing operations. The limiting tray 7 can select the corresponding outer diameter of the limiting tray 7 according to the inner diameter of the casing and the size of the fished fish, the outer diameter of the limiting tray 7 should be greater than the difference between the inner diameter of the casing and the diameter of the fish, so that the fish cannot be lifted to cause the pipe sticking during the fishing process. The upper surface of the limiting tray 7 should be chamfered to prevent scratching during the pipe lifting process. The thickness of the limiting tray 7 should be greater than 10 mm. Meanwhile, when the fishing is pressurized, the limiting tray 7 can compress the rope type fish into a ball, and the subsequent fishing is facilitated. The ground lifting and lowering string realizes the rotation operation at the well bottom, realizes the reversing, effectively solves the problem of difficult torque transmission of the conventional fishing tool, the fishhook has greater fishing strength than the conventional outer hook and hinged outer hook, the construction process is safe and reliable, the length of the hook tooth of the conventional outer hook should not be too long due to the influence of the fishing strength, if the hook tooth is too long, the hook tip is prone to falling off, the fishing outer diameter of the tool can be selected according to the size of the inner diameter of the casing, the fishing range is not affected by the size of the inner diameter of the casing, and the fishing success rate is high.

[0030] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A rod or rope type salvage tool, characterized in that: The utility model comprises an upper joint (1), a rotating mechanism, a limiting tray (7), and a spear scooping rod (8) which are sequentially connected from top to bottom. The rotating mechanism is used to drive the spear scooping rod (8) to rotate and wrap around fallen objects. The outer wall of the spear scooping rod (8) is provided with a plurality of upper and lower distributed pulling hooks.

2. A rod or rope salvage tool according to claim 1, characterized in that: The opening of the pull hook faces the direction where the limiting tray (7) is located, and the opening gradually becomes smaller from the outside to the inside.

3. A rod or rope type salvage tool according to claim 2, characterized in that: The rotating mechanism comprises a slide rod (2), a safety slider (4), and an inner sliding sleeve (5), wherein one end of the slide rod (2) extends into the inner sliding sleeve (5) and the slide rod (2) can slide on the inner wall of the inner sliding sleeve (5); the outer wall of the slide rod (2) is provided with a reversing groove (3), one end of the safety slider (4) is connected to the inner sliding sleeve (5), and the other end of the safety slider (4) extends into the reversing groove (3) of the slide rod (2).

4. A rod or rope salvaging tool according to claim 3, characterized in that: The pull hook comprises a hook tip A (9) and a hook tip B (10), and the spacings between adjacent hook tips A (9) and adjacent hook tips B (10) are the same.

5. A rod or rope type salvage tool according to claim 4, characterized in that: The middle points of the contact surfaces of several hook tips A (9) and the spear rod (8) are on the same straight line A, and the middle points of the contact surfaces of several hook tips B (10) and the spear rod (8) are on the same straight line B. The straight line A, straight line B and straight line C are evenly distributed on the outer hook rod.

6. A rod or rope type salvage tool according to claim 3, characterized in that: A plurality of water holes (6) are axially symmetrically arranged on the outer wall of the inner sliding sleeve (5).

7. A rod or rope type salvaging tool according to claim 3, characterized in that: The upper joint (1) is connected to the slide rod (2) through threads.

8. A rod or rope salvaging tool according to claim 3, characterized in that: The groove width of the reversing groove (3) is greater than the width of the safety slide block (4).

9. A rod or rope type salvaging tool according to any one of claims 3 to 5, characterized in that: The reversing groove (3) comprises a long radial groove (11), a V groove (12) and a short oblique groove (13) which are connected. The long radial groove (11) extends radially along the slide rod (2) to one end of the V groove (12). The two ends of the V groove (12) are respectively connected to the long radial groove (11) and the short oblique groove (13). The other end of the short oblique groove (13) is connected to another long radial groove (11).

10. A rod or rope salvaging tool according to claim 9, characterized in that: The inner angle of the V-groove (12) is the same as the angle between the short oblique groove (13) and the long radial groove (11).

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