CN2578514Y

CN2578514Y - Soft substance fishing gear in oil well

Info

Publication number: CN2578514Y
Application number: CN 02285161
Authority: CN
Inventors: 钱福和; 汪海英; 吴宪文
Original assignee: Daqing Petroleum Administration Bureau
Current assignee: Daqing Petroleum Administration Bureau
Priority date: 2002-11-11
Filing date: 2002-11-11
Publication date: 2003-10-08
Anticipated expiration: 2012-11-11

Abstract

The utility model belongs to an underground soft substance fishing tool in an oil well, which can carry out fishing on soft substances falling into a well. The utility model is formed by that an inner cylinder (9) assembled by a ring shoulder (10) is arranged in an outer shell of the fishing tool in a lining manner; a cylindrical spring (8) is arranged in the inner cylinder (9); the spring (8) is supported by a blocking ring (7) welded at the lower end of the inner cylinder (9); a spear rod (6) passes through the spring (8), and the upper end of the spear rod (6) is provided with an integral press cap (11) which presses the spring (8); the lower end of the spear rod (6) is extended to the lower end of the outer shell, and a cone is arranged at the lower end of the spear rod (6); a reverse hook is formed on the spear rod and above the cone; a plurality of reverse hooks (5) are uniformly distributed on the annular surface of the inner wall of the lower end of the outer shell of the fishing tool, and the bottom of a concave groove arranged between two teeth is positioned on a penetration groove section (14) which is communicated with the outer shell, wherein, the teeth are arranged on the lower end surfaces of the outer shell. The fishing tool offers a method which is the fastest and the most effective, and a bailing device is used for completing the rise and the fall of an overshot, and thereby, fishing operation and bailing operation can be carried out on soft substances in a well most effectively. The upper end of the tool is matched with a quick joint which is matched with a bailing hanging joint. The outer diameter of the overshot can be expanded freely, and steps do not scrape walls.

Description

The soft thing fisher of oil well

(1) technical field:

The utility model belongs to the down-hole fisher, particularly relates to the soft thing fisher of oil well.

(2) background technology:

At present, the bailing producing well increases gradually, and in the bailing process, the fall phenomenon of well of soft object (as wire rope) is also increasing.The accumulation of soft object has influence on the normal operation of bailing oil, water, and soft object is salvaged has realistic meaning.The research of soft object fisher instrument still is at the initial stage, and soft object fisher tool performance directly affects the operation of producing well.

(3) utility model content:

Technical problem to be solved in the utility model is at the problem that exists in the background technology, and provides a kind of oil well soft thing fisher.

The invention for solving the technical problem can reach by following technical solution: at fisher shell back boxing the inner core that assembles with the ring shoulder is arranged, be equipped with cylindrical spring in the inner core, spring is by the baffle ring support that is welded in the inner core lower end; That passes spring has a lance bar, and the upper end of lance bar has the pressure cap of one, pressure cap to be pressed on the spring; The shell lower end is stretched in the lower end of lance bar, and the lower end of lance bar is a cone, also constitutes barb on the cone on the lance bar; On shell, form the saturating groove section (14) that is communicated with in the groove bottom between uniform several barbs, lower surface two teeth on the inwall anchor ring of fisher shell lower end.

In such scheme, form the fisher shell by the top connection that is threaded, reducing short circuit and seating nipple 4, on the top connection snap joint that is threaded, form thin neck bar and dop mutually on it.On top connection and the seating nipple handle hole is arranged.Inner core is lining in the reducer union.Run into junk by the fisher lower going-into-well of above forecast scheme configuration and exert pressure by impact and enter, on carry on it barb and can finish purpose of design on the fishing junk.

The utility model is compared with background technology has following beneficial effect: this fisher is the fastest and effective method, have only removing of dipper to adopt bailing equipment to finish, reach most effectively salvage, the soft object in the bailing well, quick suspension method is adopted in the connection of this instrument.Snap joint is joined in the instrument upper end, cooperates with the bailing suspension joint.The fishing socket external diameter is less than using the casing internal diameter, and external diameter freely dilates, but less than casing inner diameter, does not have and scrape the wall step.

(4) description of drawings:

Accompanying drawing is this fisher operating principle structure chart.

(5) specific embodiment:

Below in conjunction with the drawings and specific embodiments will the utility model is described in further detail:

Shown in figure, at this shell back boxing the inner core 9 that assembles with ring shoulder 10 is arranged, inner core is equipped with cylindrical spring 8 for 9 li, and spring 8 is by baffle ring 7 supports that are welded in inner core 9 lower ends; That passes spring 8 has a lance bar 6, and there is the pressure cap 11 of one the upper end of lance bar 6, and pressure cap 11 is pressed on the spring 8; The shell lower end is stretched in the lower end of lance bar 6, and the lower end of lance bar 6 is a cone, also constitutes barb on the cone on the lance bar; On shell, form the saturating groove section (14) that is communicated with in the groove bottom between uniform several barbs 5, lower surface two teeth on the inwall anchor ring of fisher shell lower end.

In such scheme, form the fisher shell by the top connection 2 that is threaded, reducing short circuit 3 and seating nipple 4, be the snap joint that is threaded on the top connection 2, form thin neck bar and dop 1 mutually on it.Earial drainage and handle hole (12,13) are arranged on top connection and the seating nipple 4.Inner core 10 is lining in 3 li of reducer unions.

Claims

1, a kind of soft thing fisher of oil well that relates to contains the fisher shell, it is characterized in that:

A, at this shell back boxing inner core (9) with ring shoulder (10) assembling is arranged, inner core (9) lining is equipped with cylindrical spring (8), and spring (8) is by baffle ring (7) support that is welded in inner core (9) lower end; That passes spring (8) has a lance bar (6), and there is the pressure cap (11) of one the upper end of lance bar (6), and pressure cap (11) is pressed on the spring (8);

The shell lower end is stretched in the lower end of b, lance bar (6), and the lower end of lance bar (6) is a cone, also constitutes barb on the cone on the lance bar;

C, on shell, form the saturating groove section (14) that is communicated with in the groove bottom between uniform several barbs (5), lower surface two teeth on the inwall anchor ring of fisher shell lower end.

2, fisher according to claim 1, it is characterized in that: form the fisher shell by the top connection that is threaded (2), reducing short circuit (3) and seating nipple 4, top connection is the snap joint that is threaded on (2), forms thin neck bar and dop (1) mutually on it.

3, fisher according to claim 1 is characterized in that: on top connection (2) and the seating nipple (4) handle hole (12,13) is arranged.

4, fisher according to claim 2 is characterized in that: inner core (9) is lining in reducer union (3) lining.