CN2187222Y

CN2187222Y - Fishing gear

Info

Publication number: CN2187222Y
Application number: CN 93224374
Authority: CN
Inventors: 李保中; 李海平
Original assignee: PETROLEUM PROSPECTING DEVELOPMENT INST HENAN PETROLEUM PROSPECTING BUREAU
Current assignee: PETROLEUM PROSPECTING DEVELOPMENT INST HENAN PETROLEUM PROSPECTING BUREAU
Priority date: 1993-08-07
Filing date: 1993-08-07
Publication date: 1995-01-11
Anticipated expiration: 2003-08-07

Abstract

The utility model discloses a multifunctional salvaging device for petroleum and gas drilling and underground operation, which is especially suitable for salvaging accidental dropped articles of various materials and shapes in well bottoms. The lower end of the salvaging device is provided with a pulling shoe 1 whose sole is provided with hard cutting blocks. A rock core catcher 2 is arranged in the obconic inner cavity of the pulling shoe. A magnetic core assembly 4 which can glide upward along an inner cylinder is arranged in the salvaging device. Because of the comprehensive and mutually supported functions of mechanical sleeve grabbing, milling, coring, hydraulic salvaging and salvaging with high magnetic force, the salvaging device can effectively raise once salvaging success ratio and obviously reduce engineering cost.

Description

Fishing gear

The utility model relates to a kind of multi-functional fishing tool that is used for oil, gas drilling and underground work, is specially adapted to salvage the smallclothes junk of the various materials in shaft bottom, shape, as bit cone, drilling well tong tooth, slip insert etc.

Existing main tool of salvaging down-hole smallclothes junk has: strong magnetic die, junk basket with reverse circulation, cone fisher, fishing tools such as junk mill.Strong magnetic die is to utilize the magnetic force of the strong magnet on the fisher to salvage the junk that the shaft bottom can be magnetized, because of trouble of lost tool in hole is often covered by silt particle, instrument is gone into behind the well and is difficult to form desirable contact area between the magnetic patch and junk, and instrument bottom itself is easily by mud drum, and fishing success ratio is low; Junk basket with reverse circulation system adopts the anti-circulating system, junk is entered in the fishing tool, junk (as cutter shell) for large-size must be grabbed junk through rotary sleeve, because of basket pawl intensity is low, easily damages in advance and causes junk to fall into the shaft bottom again to cause and salvage failure; The conventional coring tool of the similar weak point of cone fisher, can drill through one section core taking-up ground to junk on interior stratum, shaft bottom and reach the salvaging purpose, this instrument is not because of there being anti-circulation canal, the hydraulic blow power of center hydrophthalmia drilling fluid is repelled junk in the well edge when making direct circulation, the instrument cover is grabbed the junk difficulty, this instrument does not have the guide shoe structure yet, and hole diameter amplification degree well section fishing success ratio serious and that hole deviation is bigger is lower; Junk mill milling fishing tool is that junk mill is set in instrument bottom, thus since the junk mill little after will along with junk mill rotate together lost by milling may, this instrument processing accident slow cycle of speed is long, and not thorough, easily buries accident potential to follow-up construction.

The purpose of this utility model provides a kind of shortcoming that can overcome the single salvaging function of above-mentioned fishing tool, collects the comprehensive fisher that multiple salvaging function is an one, and makes it each function and support mutually, improves one time fishing success ratio.

The purpose of this utility model is finished by following technological means: the fisher main body is made up of outer cylinder body and inner barrel, and the outer cylinder body upper end is connected with top connection by screw thread, and top and bottom are provided with anti-circulation through hole; The inner barrel upper end is provided with the valve ball seat by screw thread, top and outer cylinder body correspondingly have anti-circulation through hole, magnetic core support box cupling is housed on the bottom thread, magnetic core assembly of support on the box cupling, under anti-circulation of fluid momentum effect, junk is collected at the center, shaft bottom, and the magnetic core assembly can attract trouble of lost tool in hole along sliding on the inner core; Footwear are pulled out by being threaded in the outer cylinder body bottom, pull out shoes lumen and are turbination, pull out footwear bottom surfaces externally and internally and stud with hard cutting piece, can be used to get core, milling junk and guide junk to enter in the fisher; Be provided with the core pawl on the shoes lumen pulling out,, make it enter the fisher inner core in order to grab the disconnected core that pulls out in the footwear of card.

Machinery cover is grabbed because fisher described in the utility model combines, milling, get core, waterpower is salvaged and strong magnetic force is salvaged function, and supports mutually between each function, thereby can improve fishing success ratio effectively one time, reduces engineering cost.

Below in conjunction with accompanying drawing the technical program is further elaborated.

Fig. 1 is a concrete structure sectional drawing of the present utility model;

Fig. 2 is the structural representation of magnetic core assembly in the fisher.

Fisher outer cylinder body (6) upper and lower part has anti-circulation through hole (7), (5), and the upper end has internal thread and is connected with top connection (11), and the bottom has external screw thread and is used for connecting and pulls out footwear (1); Pull out footwear (1) and have the guide shoe groove, the bottom surfaces externally and internally studs with hard cutting piece, pulls out footwear (1) inner chamber and is turbination, is equipped with core pawl (2) on it, and the external form and the inner chamber tapering of core pawl (2) match, and core pawl (2) can be grabbed the disconnected core of card; Inner barrel (8) upper end internal thread place assembling valve ball seat (9), have in the valve ball seat (9) in order to hold the dark concealed ball seat of steel ball (10), steel ball (10) is unlikely because of dislocation makes Anti-Recirc Fault in high angle hole like this, possesses reliable sealing; Inner barrel (8) top and outer cylinder body (6) relevant position, top have anti-circulation through hole (7), and the external screw thread of bottom is in order to connect magnetic core support box cupling (3); Magnetic core assembly (4) is made up of exhausted magnetosheath (12) and magnet steel (15), magnet steel (15) is arranged on exhausted magnetosheath (12) inner chamber, be fixed together by bolt (14) with exhausted magnetosheath (12) above it, the formation strong magnetic area is exposed in the bottom surface, the shoulder that exhausted magnetosheath (12) has is located on the magnetic core support box cupling (3), is provided with vertical anti-circulation through hole (13) in exhausted magnetosheath (12) wall body.When anti-circulation was salvaged, bottom hole falling article was gathered in the center, shaft bottom by the drilling well liquid flow impact, is dragged for by the strong magnetic force of magnetic core assembly and obtains; In the pressurization drilling process, stratum core and junk promote on the magnetic core assembly sliding, enter the fisher inner core together, reach the salvaging purpose.

Claims

1, a kind of multi-functional fisher that is used for oil, gas drilling and underground work, form by outer cylinder body (6), inner barrel (8) and valve ball seat (9) etc., outer cylinder body (6) upper end joins with top connection (11), the cylindrical shell upper and lower part is provided with anti-circulation through hole (7), (5), valve ball seat (9) is equipped with in inner barrel (8) upper end, the corresponding anti-circulation through hole (7) that is provided with of top and outer cylinder body (6), it is characterized in that: footwear (1) are pulled out by being threaded in outer cylinder body (6) bottom, pull out footwear (1) inner chamber and are turbination; On inner barrel (8) bottom thread magnetic core support box cupling (3) is housed, a magnetic core assembly of support (4) on the box cupling.

2, fisher according to claim 1, it is characterized in that magnetic core assembly (4) is by magnetosheath (12) and magnet steel (15) are formed extremely, magnet steel (15) is arranged on exhausted magnetosheath (12) inner chamber, top and exhausted magnetosheath (12) are fixed together with bolt (14), expose the bottom, exhausted magnetosheath (12) has shoulder and is located on the magnetic core support box cupling (3), is provided with vertical anti-circulation through hole (13) in exhausted magnetosheath (12) wall.

3, fisher according to claim 1 and 2 is characterized in that pulling out footwear (1) inner chamber and is equipped with the core pawl (2) that profile and its tapering match, and pulls out that footwear 1 bottom has groove, surfaces externally and internally studs with hard cutting piece.

4, fisher according to claim 3 is characterized in that valve ball seat (9) center has in order to hold the ball seat of steel ball (10).