CN201627556U

CN201627556U - Fishing head capable of cutting

Info

Publication number: CN201627556U
Application number: CN2010201432226U
Authority: CN
Inventors: 张庆立; 朱枫; 宋延彰; 黄利辉; 王连波
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2010-03-29
Filing date: 2010-03-29
Publication date: 2010-11-10
Anticipated expiration: 2020-03-29

Abstract

The utility model relates to a fishing head capable of cutting, which mainly solves the problems that the action area of the bottom portion of a fishing head of a fishing device is big, and hard covering can not be crushed, and is characterized in that the lower portion of a connecting head (1) is drilled with a screw hole, the connecting head (1) and the end of a bolt (2) which passes through a center hole of a pressing cap (3) are connected by threads, the pressing cap (3) and the bolt (2) of the center hole thereof are matched through gaps, the edge of the bottom portion of a cavity (4) which is connected with the other end of the pressing cap (3) through outer threads is processed with cutting oblique teeth (9), the cutting direction of the oblique teeth (9) is identify with the screwing direction of the threads between the cavity (4) and the pressing cap (3), and the bottom portion of the pressing cap (3) is orderly provided with a pressing spring (6), a top rod (7) and a card (8). The fishing head capable of cutting has small contact surface with hard objects, has rotatable cutting function, can clean sundries on the surrounding of a fishing rod of a blanking plug, and is convenient to fish for the blanking plug.

Description

The machinable fishing head

Technical field:

The utility model relates to used fishing head in a kind of separated-zone water infection oil field exploitation, particularly a kind of machinable fishing head.

Background technology:

At present, known throw in catcher fishing head is a tubular shape, and its top is one to be connected to the pressure cap with holes of connector, and the bottom is the short tube cavity that pressure cap connects, and stage clip, push rod and card are arranged in the cavity from top to bottom.Card can be pulled its pinning out under the effect of stage clip and push rod after the fishing rod of blanking plug inserts cavity from the fishing head bottom.Application along with separate zone waterflooding technology, in order to solve interlayer contradiction, often take measures such as chemical injecting profile control, strong acid are dissolved, fracturing work, so the fishing rod of blanking plug will be buried by the remains of down-hole, and remains are more and more harder under the long term high temperature high pressure, and the fishing head cavity bottom edge of throw in catcher is a toroidal, because contact area is big, be difficult to these foreign material are smashed, can't realize salvaging the purpose of blanking plug.

The utility model content:

Technical problem to be solved in the utility model is that the active area that overcomes the throw in catcher fishing head bottom that exists in the background technology can't smash hard obducent problem greatly, and provide a kind of machinable fishing head, this machinable fishing head has and hard thing contact surface is little and have the function of rotary cutting, foreign material around the blanking plug fishing rod can be removed, be convenient to blanking plug and salvage.

The invention for solving the technical problem can reach by following technical solution: this machinable fishing head comprises connector, pressure cap, bolt, cavity, inside cavity is equipped with stage clip from top to bottom successively, push rod, card, the connector bottom is drilled with screw, connector is connected with the bolt end thread of passing the pressure cap centre bore, the bolt matched in clearance of pressure cap and its centre bore, the cavity bottom edge that is connected with pressure cap other end external screw thread is processed with the cutting helical teeth, it is consistent that the cutting direction of helical teeth screws direction with screw thread between cavity and the pressure cap, and the pressure cap bottom is equipped with stage clip successively, push rod, card.

Described pressure cap external screw thread root has a step, and the step bottom is equipped with cushion rubber;

Described bolt end and connector are by dowel fixes.

The utility model is compared with the above-mentioned background technology can have following beneficial effect: this machinable fishing head is owing to adopt said structure, the cavity bottom edge is processed with the cutting helical teeth, it is consistent that the cutting direction of helical teeth screws direction with screw thread between cavity and the pressure cap, make motion at when work cutting helical teeth turn to that to screw direction consistent with screw thread, helical teeth rotates down-cutting as drill bit, can realize removing fast the thing of burying around the blanking plug fishing rod, be convenient to salvage following blanking plug.This fishing head design is ingenious, simple in structure, significantly alleviates labor strength, increases work efficiency.Do not need former blanking plug and throw in catcher are made any change, only need fishing head is carried out certain change, have very strong practicality, be adapted at the oil field large tracts of land and promote.

Description of drawings:

Accompanying drawing 1 is a structural representation sectional view of the present utility model;

Accompanying drawing 2 is upward views of accompanying drawing 1.

Among the figure: 1-connector, 2-bolt, 3-pressure cap, 4-cavity, 5-pin, 6-stage clip, 7-push rod, 8-card, 9-helical teeth, 10-step.

The specific embodiment:

Below in conjunction with accompanying drawing will the utility model is described in further detail:

As shown in Figure 1, this machinable fishing head comprises connector 1, pressure cap 3, bolt 2, cavity 4, cavity 4 inside are equipped with stage clip 6, push rod 7, card 8 from top to bottom successively, and connector 1 bottom is drilled with screw, and pressure cap 3 and connector 1 cooperate assembling, bolt 2 ends are by in the screw of pressure cap 3 centre bores through connector 1, be threaded with connector 1, and bolt 2 is terminal fixing by pin 5 with connector 1, prevents that bolt 2 is with getting loose between the connector 1; Bolt 2 matched in clearance of pressure cap 3 and its centre bore, promptly pressure cap 3 is enclosed within on the bolt 2 and can freely rotates, and forms a radially degree of freedom, is beneficial to the rotary cutting overburden; Pressure cap 3 lower end external screw threads are connected with cavity 4, and pressure cap 3 external screw thread roots have a step 10, and step 10 bottoms are equipped with cushion rubber, prevent that 4 of pressure cap 3 and cavitys are loosening; Cavity 4 bottom margins are processed with cutting helical teeth 9, it is consistent that the cutting direction of helical teeth 9 screws direction with screw thread between cavity 4 and the pressure cap 3, as shown in Figure 2, make motion at when work cutting helical teeth turn to that to screw direction consistent with screw thread, when preventing stressed rotations of cavity 4 and pressure cap 3 dropouts.

Throw in catcher is transferred fast in the down-hole during work, the hard thing of helical teeth 9 contacts of cavity 4 bottom margins, stressed on the bottom surface is uneven, cutting edge is a contact, along with helical teeth 9 turns round downwards, the inclined-plane contact of helical teeth 9 increases gradually, working angles becomes the face contact, and the stressed of cutting edge rear portion also increases gradually like this, will push away the helical teeth rotation, this fishing head is pounded once under every with throw in catcher, the cutting helical teeth 9 that drives cavity 4 can constantly change the position and cut impact, and helical teeth 9 can be realized removing fast blanking plug and bury thing just as drill bit rotates down-cutting, after the hard thing removing with the landfill blanking plug, facilitate the blanking plug below salvaging.The fishing rod of blanking plug inserts in cavity 4 cards 8 from the bottom, under the effect of push rod 7, stage clip 6, blanking plug can be pinned and pull out.

This machinable fishing head is simple in structure, designs ingeniously, can significantly reduce labour intensity, increases work efficiency.Only need fishing head is carried out certain change, former blanking plug and throw in catcher need not made any change, have very strong practicality, are adapted at the oil field large tracts of land and promote.

Claims

1. machinable fishing head, comprise connector (1), pressure cap (3), bolt (2), cavity (4), cavity (4) inside is equipped with stage clip (6) from top to bottom successively, push rod (7), card (8), it is characterized in that: connector (1) bottom is drilled with screw, connector (1) is connected with bolt (2) end thread of passing pressure cap (3) centre bore, bolt (2) matched in clearance of pressure cap (3) and its centre bore, cavity (4) bottom margin that is connected with pressure cap (3) other end external screw thread is processed with cutting helical teeth (9), between the same cavity of cutting movement direction (4) of helical teeth (9) and the pressure cap (3) screw thread to screw direction consistent, pressure cap (3) bottom is equipped with stage clip (6) successively, push rod (7), card (8).

2. machinable fishing head according to claim 1 is characterized in that: described pressure cap (3) external screw thread root has a step (10), and step (10) bottom is equipped with cushion rubber.

3. machinable fishing head according to claim 1 and 2 is characterized in that: described bolt (2) is terminal fixing by pin (5) with connector (1).