CN219101287U

CN219101287U - Hydraulic control reliable salvage female cone

Info

Publication number: CN219101287U
Application number: CN202223585714.2U
Authority: CN
Inventors: 李航; 洪德强; 宦佳美; 郑廷碧; 严锡姣; 赵叶
Original assignee: Guizhou Gaofeng Petroleum Machinery Co Ltd
Current assignee: Guizhou Gaofeng Petroleum Machinery Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-30
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a hydraulic control reliable fishing female cone, which comprises a female cone body and a floating valve component arranged in the female cone body, wherein the floating valve component comprises a valve body fixedly arranged in an inner hole of the female cone body, a guide sleeve is fixedly connected to the upper end of the valve body, a valve core is slidably connected to the guide sleeve, a spring is arranged between the valve core and the guide sleeve, the lower end face of the valve core is in sealing fit with the valve body, a steel pipe is connected to the lower end of the valve core in a threaded manner, and a central hole of the valve core is communicated with a central hole of the steel pipe. According to the utility model, the length required to be buckled is set on the well platform, the mud signal feedback is generated when the female cone is buckled to the set length after the well is closed, and then the drill string is lifted up, so that the fish can be fished out of the well bottom, the risk of falling in the middle is avoided, the repeated buckling condition is avoided, the fishing success rate is greatly improved, the fishing period is shortened, and the fishing cost is saved.

Description

Hydraulic control reliable salvage female cone

Technical Field

The utility model relates to a hydraulic control reliable fishing female cone, and belongs to the technical field of underground fishing.

Background

The female cone is a tool for salvaging pipe loaded objects from the outside of the pipe body, and 1 is processed in the female cone: 16 or 1:12, driving the female cone to rotate through the drill string, tapping a male thread matched with the female cone at the top of the junk, and screwing the male thread and the female cone thread to salvage the junk out of the well bottom. But the make-up process of the female cone is carried out in the pit, whether the make-up length reaches the salvage requirement can not be directly observed, whether the make-up is salvaged or not can only be indirectly judged through mud pressure change, drill string torque change and the like, repeated salvage is often caused by inaccurate judgment, and even the make-up length falls after being lifted for a certain distance, so that new underground accidents are caused.

The traditional female cone salvage needs driller to judge whether the buckling length reaches the buckling requirement through the torque change of the drill string by experience, if so, the driller lifts the drilling tool by 3-5 meters and then suddenly brakes the brake crank, whether the fish is firmly meshed is tested, the operation is repeated for several times, if not falling, the driller can continue lifting, however, the driller is careful to operate, the falling fish still has the risk of falling midway, and the root cause is that the buckling length cannot be accurately judged by the well bench. If the fish head falls, the fish head needs to be newly buckled, repeated buckling is time-consuming and labor-consuming, the fish head is possibly damaged thoroughly, and the fish head cannot be salvaged.

Disclosure of Invention

The utility model aims to provide a hydraulic control reliable fishing female cone, which can convert the buckling length of the female cone into the pressure of mud to transmit signals to a well platform, and can visually observe and judge whether the buckling length of the female cone meets the requirement or not and whether a drilling tool can be lifted up or not on the well platform, so that the whole fishing process is simpler and more reliable.

The technical scheme of the utility model is as follows: the utility model provides a reliable female cone of salvaging of liquid accuse, includes female cone body and sets up the valve part that floats in female cone body, the valve part that floats includes fixed mounting in female cone body hole, at the upper end fixedly connected with uide bushing of valve body, sliding connection has the case in the uide bushing, installs the spring between case and uide bushing, the lower terminal surface and the valve body of case form sealing fit, have the steel pipe at the lower extreme threaded connection of case, and the centre bore of case and the centre bore intercommunication of steel pipe.

Further, the valve core is respectively sleeved with a pressure plate and a sealing plate.

Further, the lower end of the steel pipe is a plugging end, and a liquid flow hole is formed in the side wall of the lower end of the steel pipe.

Further, two sides of the valve body are symmetrically provided with the overflow windows.

Further, an O-shaped ring is arranged between the valve body and the female cone body.

By adopting the technical scheme, the utility model has the advantages that: according to the utility model, the length required to be buckled is set on the well platform, the mud signal feedback is generated when the female cone is buckled to the set length after the well is closed, and then the drill string is lifted up, so that the fish can be fished out of the well bottom, the risk of falling in the middle is avoided, the repeated buckling condition is avoided, the fishing success rate is greatly improved, the fishing period is shortened, and the fishing cost is saved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of a schematic structural view of the valve body;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a schematic view of the flow of drilling fluid at the upper end of a fish according to the utility model;

FIG. 6 is a schematic view of the flow of drilling fluid after the fishing threads of the present utility model bite into the fish.

In the figure: 1-a female cone body; 2-float valve means; 3-a valve body; 4-a guide sleeve; 5-a spring; 6-pressing a disc; 7-sealing disc; 8-valve core; 9-O-rings; 10-steel pipe; 11-upper connecting threads; 12-a liquid flow hole; 13-fishing threads; 14-overcurrent window.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and examples.

Embodiments of the utility model: referring to fig. 1-4, the hydraulic control reliable fishing female cone comprises a female cone body 1 and a floating valve component 2 arranged in the female cone body 1, wherein the floating valve component 2 comprises a valve body 3 fixedly arranged in an inner hole of the female cone body 1, a guide sleeve 4 is fixedly connected to the upper end of the valve body 3, a valve core 8 is slidably connected in the guide sleeve 4, a spring 5 is arranged between the valve core 8 and the guide sleeve 4, the lower end face of the valve core 8 is in sealing fit with the valve body 3, a steel pipe 10 is connected to the lower end of the valve core 8 in a threaded manner, and a center hole of the valve core 8 is communicated with a center hole of the steel pipe 10. The valve core 8 is respectively sleeved with a pressure plate 6 and a sealing plate 7. The lower end of the steel pipe 10 is a plugging end, and a liquid flow hole 12 is formed in the side wall of the lower end of the steel pipe 10. The two sides of the valve body 3 are symmetrically provided with the overflow windows 14. An O-shaped ring 9 is arranged between the valve body 3 and the female cone body 1.

The working principle of the utility model is as follows:

the upper end of a female cone body 1 is provided with an upper connecting thread 11, the lower end of the female cone body is provided with a salvaging thread 13, the device is connected with a drill rod through the upper connecting thread 11, well drilling fluid enters the bottom of the well from a well mouth, the well drilling fluid washes down-hole fish through a fluid flow hole 12 of a floating valve component 2, the concrete flow direction is shown in figure 5, and the pressure of the upper end of the female cone is higher than the pressure of the lower end; when the device is positioned at the upper end of the fish, the liquid flow hole 12 in the steel pipe washes the fish, and after the fish enters the female cone, the female cone 1 is driven to rotate through the rotation of the drill rod, so that the salvaging screw thread 13 is forced to squeeze and bite the outer wall of the fish to buckle.

The fishing thread 13 in the female cone has the characteristic of high-hardness barb spiral saw teeth, so that a pin thread can be manufactured on the surface of the fish, and the fish is prevented from falling midway when the fish is lifted. When the buckling length is the same as the design length, the steel pipe 10 is propped by the fish at the moment, the steel pipe 10 is pushed to move upwards by continuing to buckle, the valve core 8 is pushed to move upwards to compress the spring 5, a channel between the valve core 8 and the valve body 3 is opened, as shown in fig. 6, drilling fluid flows into the bottom of the well from the channel, the pressure at the upper end suddenly drops due to the opening of the channel, the pressure index of the ground pressure gauge is reduced, the rotation is stopped, and the junk is fished out by adopting the lifting method.

Claims

1. The utility model provides a reliable female awl of salvaging of liquid accuse, includes female awl body (1) and sets up floating valve part (2) in female awl body (1), its characterized in that: the floating valve component (2) comprises a valve body (3) fixedly installed in an inner hole of a female cone body (1), a guide sleeve (4) is fixedly connected to the upper end of the valve body (3), a valve core (8) is slidably connected to the guide sleeve (4), a spring (5) is installed between the valve core (8) and the guide sleeve (4), the lower end face of the valve core (8) is in sealing fit with the valve body (3), a steel pipe (10) is connected to the lower end of the valve core (8) through threads, and a center hole of the valve core (8) is communicated with a center hole of the steel pipe (10).

2. The hydraulically controlled reliable fishing female cone as claimed in claim 1, wherein: the valve core (8) is respectively sleeved with a pressure plate (6) and a sealing plate (7).

3. The hydraulically controlled reliable fishing female cone as claimed in claim 1, wherein: the lower end of the steel pipe (10) is a plugging end, and a liquid flow hole (12) is formed in the side wall of the lower end of the steel pipe (10).

4. The hydraulically controlled reliable fishing female cone as claimed in claim 1, wherein: the two sides of the valve body (3) are symmetrically provided with the overflow windows (14).

5. The hydraulically controlled reliable fishing female cone as claimed in claim 1, wherein: an O-shaped ring (9) is arranged between the valve body (3) and the female cone body (1).