CN111706286A

CN111706286A - Device and method for fishing fallen well cable through core again

Info

Publication number: CN111706286A
Application number: CN202010618082.1A
Authority: CN
Inventors: 徐增鑫; 张晓飞; 徐志宏; 张明; 张国新
Original assignee: Jingbian Hongxing Oil Well Technology Service Co ltd
Current assignee: Jingbian Hongxing Oil Well Technology Service Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-25

Abstract

A fishing device and a method for re-threading a fallen well cable are provided, wherein the lower end of a first drilling tool is provided with a fishing barrel, the perpendicular bisector of the first drilling tool and the perpendicular bisector of the fishing barrel are the same straight line, and a self-locking fishing hook is arranged between the first drilling tool and the interior of the fishing barrel. The self-locking fishing hook is lowered to the bottom of the fishing cylinder through the inside of the first drilling tool, the telescopic outer cylinder is compressed under the action of the spring, the bottom of the telescopic outer cylinder is contacted with the bottom of the fishing, the fishing hook is used for fishing the falling cable, the falling cable is pulled up through the second drilling tool and stretched, the falling cable is fished out through the inside of the first drilling tool and is straightened to a certain tension, the head of the falling cable is connected with the quick connector at a well mouth, the falling cable is fished by a core-through fishing method, the falling cable and a clamping tool can be quickly fished, the drilling trip times and the operation workload are reduced, the construction period is shortened, the fishing efficiency is improved, and the well wall or a sleeve pipe is effectively prevented from being abraded due to excessive drilling and long-time operation.

Description

Device and method for fishing fallen well cable through core again

Technical Field

The invention belongs to the technical field of drilling, and particularly relates to a device and a method for fishing a fallen well cable through a core.

Background

Due to the fact that the well inclination is large, the weight of a cable or the inner diameter of a perforating gun body is too large, the weakness of the cable is made to be invalid by original people, and after the cable is broken and falls into the well when a cable carrying or delivering tool meets a clamp, the cable fishing operation amount is greatly increased, the number of times of pulling and tripping is large, the construction time is long, and even the well casing wall is seriously abraded due to the fact that the fishing operation period is too long.

After the cable operation is fallen into the well, the cable fishing is a big difficulty in the well logging industry, and the elders in the industry use various methods to solve the problem to improve the shape of the tool, and use tools such as an outer hook, an inner and outer combined fishing hook, an inner hook and the like to salvage. The original core-penetrating fishing process is that a cable is carried or delivered to an underground tool to meet resistance, the cable is not broken and taken off, the cable is pulled to be under proper tension, the cable is clamped to be cut off after the wellhead by using a T-shaped clamp special for the cable, the lower part of the cable is connected with a quick coupling and then a lower cable head is located at the wellhead, a weighting rod is added to the upper part of the cable, then the cable is penetrated into a fishing tool and a drilling tool by using the quick coupling when a single cable is added, the purpose that the underground fishing meets the clamping tool is called core-penetrating fishing, but the process cannot be used once the cable is broken and the well falls.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a device and a method for salvaging a fallen well cable quickly and avoiding the abrasion damage to a well wall or a sleeve caused by excessive tripping.

The technical scheme for solving the technical problems is as follows: the lower end of the first drilling tool is provided with a fishing barrel, the perpendicular bisector of the first drilling tool and the perpendicular bisector of the fishing barrel are the same straight line, and a self-locking fishing hook is arranged in the middle of the inside of the first drilling tool and the fishing barrel.

The self-locking fishing hook of the invention comprises: the lower end of the second drilling tool is connected with the telescopic outer barrel through a connector, a spring is arranged in the telescopic outer barrel, the upper end of the spring is connected with the connector, the lower end of the spring is connected with the inside of the telescopic outer barrel, and a fishing hook is arranged at the lower end of the connector in the telescopic outer barrel.

The telescopic outer cylinder is a cylindrical cylinder, and the inner diameter of the telescopic outer cylinder is 55-75 mm.

The included angle alpha between the plane of the bottom surface of the telescopic outer cylinder and the plane of the horizontal plane is 35-40 degrees.

The method for using the re-core-penetrating fishing device for the well-falling cable comprises the following steps:

(1) putting the first drilling tool and the overshot into a well, and dropping to the head position of a well dropping cable;

(2) the self-locking fishing hook is lowered to the inner bottom of the fishing barrel through the inside of the first drilling tool, the telescopic outer barrel is compressed under the action of the spring, the bottom of the telescopic outer barrel is contacted with the bottom of the fishing barrel, the fishing hook extends out of the bottom of the fishing barrel to salvage a well falling cable, the well falling cable is pulled up to a well mouth through the second drilling tool after fishing, and the telescopic outer barrel is stretched;

(3) and fishing out the well falling cable through the inside of the first drilling tool, straightening the well falling cable, connecting the head of the well falling cable with a quick connector at a well mouth, and fishing out the well falling cable by a core-penetrating fishing method.

The self-locking fishing hook is lowered to the bottom of the fishing cylinder through the inside of the first drilling tool, the telescopic outer cylinder is compressed under the action of the spring, the bottom of the telescopic outer cylinder is contacted with the bottom of the fishing, the fishing hook is used for fishing the falling cable, the falling cable is pulled up through the second drilling tool and stretched, the falling cable is fished out through the inside of the first drilling tool and is straightened to a certain tension, the head of the falling cable is connected with the quick connector at a well mouth, the falling cable is fished by a core-through fishing method, the falling cable and a clamping tool can be quickly fished, the drilling trip times and the operation workload are reduced, the construction period is shortened, the fishing efficiency is improved, and the well wall or a sleeve pipe is effectively prevented from being abraded due to excessive drilling and long-time operation.

Drawings

FIG. 1 is a schematic diagram of the invention before cable fishing.

Fig. 2 is a schematic view of the structure of the present invention when fishing a cable.

Fig. 3 is a schematic structural diagram of the self-locking fishing hook 3 in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in fig. 1-3, the re-coring fishing device for a well cable in the embodiment is formed by connecting a first drilling tool 1, a fishing barrel 2 and a self-locking fishing hook 3.

The fishing barrel 2 is installed at the lower end of the first drilling tool 1, the perpendicular bisector of the first drilling tool 1 and the perpendicular bisector of the fishing barrel 2 are the same straight line, the self-locking fishing hook 3 is installed in the middle of the inside of the first drilling tool 1 and the fishing barrel 2, the self-locking fishing hook 3 is formed by connecting a second drilling tool 301, a connector 302, a telescopic outer barrel 303, a spring 304 and a fishing hook 305, the self-locking fishing hook 3 is formed by connecting the lower end of the second drilling tool 301 and the telescopic outer barrel 303 through the connector 302, the telescopic outer barrel 303 is a cylindrical barrel, and the inner diameter of the telescopic outer barrel 303 is 60 mm. The angle α between the plane of the bottom surface of the telescopic outer cylinder 303 and the plane of the horizontal plane is 37 °. The telescopic outer cylinder 303 is internally provided with a spring 304, the upper end of the spring 304 is connected with a connector 302, the lower end of the spring 304 is connected with the inside of the telescopic outer cylinder 303, the telescopic outer cylinder 303 is telescopic under the action of the spring 304, the lower end of the connector 302 in the telescopic outer cylinder 303 is provided with a fishing hook 305, and the fishing hook 305 is used for fishing a well falling cable 4.

Example 2

The fishing barrel 2 is installed at the lower end of the first drilling tool 1, the perpendicular bisector of the first drilling tool 1 and the perpendicular bisector of the fishing barrel 2 are the same straight line, the self-locking fishing hook 3 is installed in the middle of the inside of the first drilling tool 1 and the fishing barrel 2, the self-locking fishing hook 3 is formed by connecting a second drilling tool 301, a connector 302, a telescopic outer barrel 303, a spring 304 and a fishing hook 305, the self-locking fishing hook 3 is formed by connecting the lower end of the second drilling tool 301 and the telescopic outer barrel 303 through the connector 302, the telescopic outer barrel 303 is a cylindrical barrel, and the inner diameter of the telescopic outer barrel 303 is 55 mm. The angle α between the plane of the bottom surface of the telescopic outer cylinder 303 and the plane of the horizontal plane is 35 °. A spring 304 is installed in the telescopic outer cylinder 303, the upper end of the spring 304 is connected with the connector 302, the lower end of the spring 304 is connected with the inside of the telescopic outer cylinder 303, the telescopic outer cylinder 303 stretches under the action of the spring 304, a fishing hook 305 is installed at the lower end of the connector 302 in the telescopic outer cylinder 303, and the fishing hook 305 is used for fishing the well-falling cable 4.

The other components and the connection relationship of the components are the same as those in embodiment 1.

Example 3

The fishing barrel 2 is installed at the lower end of the first drilling tool 1, the perpendicular bisector of the first drilling tool 1 and the perpendicular bisector of the fishing barrel 2 are the same straight line, the self-locking fishing hook 3 is installed in the middle of the inside of the first drilling tool 1 and the fishing barrel 2, the self-locking fishing hook 3 is formed by connecting a second drilling tool 301, a connector 302, a telescopic outer barrel 303, a spring 304 and a fishing hook 305, the self-locking fishing hook 3 is formed by connecting the lower end of the second drilling tool 301 and the telescopic outer barrel 303 through the connector 302, the telescopic outer barrel 303 is a cylindrical barrel, and the inner diameter of the telescopic outer barrel 303 is 75 mm. The included angle alpha between the plane of the bottom surface of the telescopic outer cylinder 303 and the plane of the horizontal plane is 40 degrees. A spring 304 is installed in the telescopic outer cylinder 303, the upper end of the spring 304 is connected with the connector 302, the lower end of the spring 304 is connected with the inside of the telescopic outer cylinder 303, the telescopic outer cylinder 303 stretches under the action of the spring 304, a fishing hook 305 is installed at the lower end of the connector 302 in the telescopic outer cylinder 303, and the fishing hook 305 is used for fishing the well-falling cable 4.

The method for using the well-dropping cable to re-penetrate the core fishing device comprises the following steps:

(1) the first drilling tool 1 and the overshot 2 are put into a well 5 and fall to the head position of a well-falling cable 4;

(2) the self-locking fishing hook 3 is lowered to the inner bottom of the fishing barrel 2 through the inside of the first drilling tool 1, the telescopic outer barrel 303 is compressed under the action of the spring 304, the bottom of the telescopic outer barrel 303 is contacted with the bottom of the fishing barrel 2, the fishing hook 305 extends out of the bottom of the fishing barrel 2 to fish the well-falling cable 4, the well-falling cable 4 is pulled up to a well mouth through the second drilling tool 301 after fishing, and the telescopic outer barrel 303 is stretched;

(3) the well falling cable 4 is fished out through the inside of the first drilling tool 1, the well falling cable 4 is straightened, the head of the well falling cable 4 is connected with a quick connector at a well mouth, and the well falling cable 4 is fished by a core-through fishing method.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. The utility model provides a cable rethreading core fishing device that falls, its characterized in that: the fishing device is characterized in that the lower end of the first drilling tool (1) is provided with a fishing barrel (2), the perpendicular bisector of the first drilling tool (1) and the perpendicular bisector of the fishing barrel (2) are the same straight line, and a self-locking fishing hook (3) is arranged in the middle of the inside of the first drilling tool (1) and the fishing barrel (2).

2. The re-coring fishing device for well-falling cables according to claim 1, characterized in that the self-locking fishing hook (3) is: the lower end of the second drilling tool (301) is connected with the telescopic outer cylinder (303) through a connector (302), a spring (304) is arranged in the telescopic outer cylinder (303), the upper end of the spring (304) is connected with the connector (302), the lower end of the spring is connected with the inside of the telescopic outer cylinder (303), and the lower end of the connector (302) in the telescopic outer cylinder (303) is provided with a fishing hook (305).

3. A well cable re-coring fishing device as claimed in claim 2, wherein: the telescopic outer cylinder (303) is a cylindrical cylinder, and the inner diameter of the telescopic outer cylinder (303) is 55-75 mm.

4. A drop cable re-coring fishing device as claimed in claim 2 or 3, wherein: the included angle alpha between the plane of the bottom surface of the telescopic outer cylinder (303) and the plane of the horizontal plane is 35-40 degrees.

5. A method of using the re-coring fishing device for a well cable of claim 1, comprising the steps of:

(1) placing the first drilling tool (1) and the overshot (2) into a well (5) and dropping to the head position of a well-dropping cable (4);

(2) the self-locking fishing hook (3) is lowered to the inner bottom of the fishing barrel (2) through the inside of the first drilling tool (1), the telescopic outer barrel (303) is compressed under the action of the spring (304), the bottom of the telescopic outer barrel (303) is contacted with the bottom of the fishing barrel (2), the fishing hook (305) extends out of the bottom of the fishing barrel (2) to fish a well-falling cable (4), the well-falling cable (4) is pulled up to a well mouth through the second drilling tool (301) after fishing, and the telescopic outer barrel (303) is stretched;

(3) the well falling cable (4) is fished out through the inside of the first drilling tool (1), the well falling cable (4) is straightened, the head of the well falling cable (4) is connected with a quick connector at a well mouth, and the well falling cable (4) is fished through a core-penetrating fishing method.