CN216553854U - Non-pressure fish feeding ball type fishing barrel - Google Patents

Abstract

A non-pressure fish-entering throwing ball type fishing barrel comprises an outer barrel, a taper sleeve and a steel ball, wherein the outer barrel is of a cylindrical structure with a central water hole, the taper sleeve is arranged in the central water hole of the outer barrel and is provided with an upper inner conical surface and a lower inner conical surface which are oppositely arranged, an arc-shaped pit is formed in the upper inner conical surface, the curvature radius of the upper part of the pit is larger than that of the lower part of the pit, and the steel ball is a ball with the diameter of 10-25 mm, so that the guiding-in mode of underground falling fish is improved, the non-pressure guiding-in of the falling fish is realized, the falling fish is tightly clamped by means of ball throwing at a well mouth, the operation procedure of the underground falling fish is simplified, the reliability of the fishing operation of the underground falling fish is favorably improved, the reasonable matching combination of a fishing tool for a sucker rod can be realized by adopting a split structure of the taper sleeve and the outer barrel, the fishing operation for complicated well conditions and fishing operation for special falling fish can be expanded, and the fishing effect of the underground falling fish is further improved, meanwhile, the device has the advantages of simple structure, convenience in use, easiness in maintenance and lower cost, and has wide popularization and application prospects.

Description

Non-pressure fish feeding ball type fishing barrel

Technical Field

The utility model relates to a fishing barrel, in particular to a non-pressure fish-entering ball-throwing type fishing barrel.

Background

The sucker rod fishing tool is a special tool for fishing tubular porous falling objects such as oil pipes, drill rods, milling sleeves, packers, water distributors and production distributors, and the currently used sucker rod fishing tool mainly comprises two types: one type is a three-ball fisher, and the other type is a slip fisher. In the fishing process of the underground falling fish of the oil well under the complex well condition, the underground falling fish needs to be milled, the matched combined aperture of the fishing barrel and the milling tool has higher requirements, and the fishers are generally of integrated structures with fixed apertures, so that the aperture combination mode of the fishing barrel and the milling tool is greatly limited, the existing tool is difficult to establish an ideal combination mode for irregular fish heads or instrument strings sometimes, and a good fishing effect cannot be obtained; meanwhile, the three-ball fisher and the slip fisher respectively utilize the interaction of the steel ball and the slip with the underground fish to push the steel ball and the slip to lift and increase the diameter, the underground fish is guided in, the underground fish can bear larger pressure in the interaction process, the underground fish in an unstable state can swing under the action of the pressure, or the damage of a logging instrument is caused, the fishing effect is influenced, and economic loss is generated. Therefore, the sucker rod fishing tool in the prior art needs to be researched and improved, the leading-in mode of the underground fish is improved, the operation procedure of the underground fish is simplified, and the fishing effect of the underground fish is improved.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the non-pressure fish entering throwing ball type fishing barrel adopts the operation modes of non-pressure leading-in of underground falling fish and ball throwing clamping, and improves the fishing effect of the underground falling fish and the reliability of fishing operation.

A non-pressure fish ball throwing overshot, comprising: the outer cylinder is of a cylindrical structure with a central water hole, the upper end and the lower end of the outer cylinder are respectively provided with a connecting structure used for being connected with a drill rod of a drilling tool, the taper sleeve is installed in the central water hole of the outer cylinder in a matched mode, the upper portion and the lower portion of the outer cylinder are respectively provided with an upper inner conical surface used for assisting in clamping falling fish and a lower inner conical surface used for guiding and capturing the falling fish, the upper inner conical surface and the lower inner conical surface are arranged in an opposite mode, a diameter reduction area of the central water hole is formed in the taper sleeve, the steel ball is a ball body with the diameter of 10-25 mm, the steel ball is placed on the upper inner conical surface from the water hole of the outer cylinder and used for mutually matching with the upper inner conical surface to clamp the underground falling fish guided into the taper sleeve.

Furthermore, preferably the taper sleeve with adopt components of a whole that can function independently detachable to connect the mode of setting between the urceolus, on the one hand can be to the specification characteristic of the fish that falls in the pit, the configuration of selecting has corresponding bore the taper sleeve highlights the pertinence of production and application, and reasonable supporting combination sucker rod fishing tool improves the salvage effect, and on the other hand combines the structural feature of the fish that falls in the pit, selects the different positions of urceolus installation the taper sleeve to guarantee furthest to leading-in the urceolus the fish that falls in the pit improves the steadiness of joint.

Further, preferably, the upper inner conical surface of the taper sleeve is provided with an arc-shaped concave pit so as to guide the steel balls to be reasonably distributed and positioned, improve the effective matching of the steel balls and the upper inner conical surface and more firmly clamp the underground fish.

Further, preferably, the arc-shaped concave pits are strip-shaped concave pits vertically arranged along the upper inner conical surface, the curvature radius of the upper part is larger than that of the lower part,

the utility model has the advantages that the pressureless fish entering and throwing ball type fishing barrel is provided, the leading-in mode of underground falling fish is improved, pressureless leading-in of the falling fish is realized, the falling fish is tightly clamped by throwing balls at a well mouth, the operation procedure of the underground falling fish is simplified, the reliability of fishing operation of the underground falling fish is favorably improved, fishing operation under complex well conditions is ensured, and fishing effect of fishing the underground falling fish with irregular fish heads or in an unstable state is realized.

Drawings

Fig. 1 is a structural diagram of a non-pressure fish throwing ball type overshot.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

FIG. 3 is a schematic view of the working state of the ball-throwing type overshot for fish without pressing in

Detailed Description

The technical solution claimed by the present invention is further described in detail with reference to the specific embodiments and the accompanying drawings.

A non-pressure fish-entering throwing ball type fishing barrel is shown in figures 1 and 2 and comprises an outer barrel 1, a conical sleeve 2 and a steel ball 3, wherein the outer barrel 1 is of a cylindrical structure, the upper end and the lower end of the outer barrel are respectively provided with an internal thread and an external thread for connecting with a drilling tool drill rod, the conical sleeve 2 is installed in a central water hole of the outer barrel 1 in a matching mode, the upper portion and the lower portion of the conical sleeve are respectively provided with an upper inner conical surface and a lower inner conical surface which are oppositely arranged, an arc-shaped pit 5 is formed in the upper inner conical surface of the conical sleeve 2, the arc-shaped pit 5 is a strip-shaped pit vertically arranged along the upper inner conical surface, the curvature radius of the upper portion is larger than that of the lower portion, the steel ball 3 is a ball body with the diameter range of 10-25 mm and is used for mutually matched with the upper inner conical surface to clamp down-hole fish led into the conical sleeve 2, and the conical sleeve 2 and the outer barrel 1 are connected in a split detachable mode, the taper sleeves 2 with different calibers can be selected to be installed in a matching way, and different installation positions on the outer cylinder 1 can be selected.

When the non-pressure fish-entering and ball-throwing type fishing barrel is applied to fishing operation, the non-pressure fish-entering and ball-throwing type fishing barrel is assembled in a matching way at a well mouth, a taper sleeve 2 which is matched with the underground fallen fish is selected to be installed in a matching way at a proper position of an outer barrel 1 according to the structural characteristics of the underground fallen fish 4 to be fished, on the basis that the taper sleeve 2 is matched with the outer diameter of the fish head of the underground fish 4, when the length of the fish head of the underground fish 4 is shorter, the taper sleeve 2 is selectively arranged on the upper part of the outer cylinder 1, and when the length of the fish head of the fish 4 is longer, the taper sleeve 2 is selectively arranged at the lower part of the outer cylinder 1 to ensure that the fish 4 can be guided into the outer cylinder 1 to the maximum extent, the swing amplitude of the underground fish 4 is reduced through the restriction of the outer cylinder 1, the fishing stability is improved, and the fishing effect on the underground fish 4 is ensured; then the assembled fishing barrel without the pressure is connected to a drill rod of a drilling tool and sent to the underground, as shown in figure 3, the fishing barrel reaches a preset fishing position, the fish head of the underground fish 4 is fully guided into the taper sleeve 2 under the state of not applying any pressure, the underground fish 4 is maximally guided into the outer barrel 1, then steel balls 3 with different diameters within a certain diameter range are thrown into a water hole of the drill rod of the drilling tool from a wellhead, the diameter of the steel balls 3 is ensured to be smaller than the gap between the fish head of the underground fish 4 and the minimum aperture of the taper sleeve 2, the thrown steel balls 3 are prevented from falling off from the outer barrel 1 and falling to the underground, after the steel balls 3 are delivered, the drill rod of the drilling tool is driven to drive the outer barrel 1 to vibrate briefly, and the delivered steel balls 3 are enabled to be adjusted and distributed in the taper sleeve 2, arranging and dropping positions, and finally, slightly lifting the drilling tool drilling rod, wherein the drilling tool drilling rod and the steel ball 3 move relatively to enable the steel ball 3 to move downwards along an upper inner conical surface relative to the taper sleeve 2, the steel balls 3 with specific diameters on part of the distributed positions are embedded and clamped between the taper sleeve 2 and the fish head of the underground fish 4, the underground fish 4 is connected with the outer cylinder 1, and the underground fish is salvaged to the ground of a well mouth along with the continuous lifting of the drilling tool drilling rod, so that the salvage operation is completed.

Claims (4)

1. A non-pressure fish ball throwing type overshot is characterized by comprising: the outer cylinder (1) is of a cylinder structure with a central water hole, the upper end and the lower end of the outer cylinder (1) are respectively provided with a connecting structure, the taper sleeve (2) is installed in the central water hole of the outer cylinder (1) in a matched mode, the upper portion and the lower portion of the outer cylinder are respectively provided with an upper inner conical surface and a lower inner conical surface, the upper inner conical surface and the lower inner conical surface are arranged in an opposite mode, a diameter shrinkage area of the central water hole is formed in the taper sleeve, and the steel ball is a sphere with the diameter of 10-25 mm.

2. A non-pressure entry fish ball feed overshot as claimed in claim 1, characterized in that: the method comprises the following steps: the taper sleeve (2) and the outer cylinder (1) are connected in a split detachable mode.

3. A non-pressure entry fish pitch overshot as claimed in claim 1 or 2, characterized in that: an arc-shaped concave pit is arranged on the inner conical surface of the upper cone of the cone sleeve (2).

4. A non-pressure entry fish ball overshot as claimed in claim 3, characterized in that: the arc-shaped concave pits are strip-shaped concave pits vertically arranged along the upper inner conical surface, and the curvature radius of the upper part is larger than that of the lower part.

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