CN202381012U

CN202381012U - Washover inversely-buckled salvage cylinder

Info

Publication number: CN202381012U
Application number: CN2011204254738U
Authority: CN
Inventors: 于启海; 潘恩林; 詹美珍; 朱海东; 赵伟; 王国军; 王秀波
Original assignee: China National Petroleum Corp; Liaohe Petroleum Exploration Bureau
Current assignee: China National Petroleum Corp; Liaohe Petroleum Exploration Bureau
Priority date: 2011-11-01
Filing date: 2011-11-01
Publication date: 2012-08-15
Anticipated expiration: 2021-11-01

Abstract

The utility model relates to a salvage device for dropping objects in the horizontal well pipe category, and particularly relates to a washover inversely-buckled salvage cylinder. The upper end of a spear salvage rod is connected with a female thread of an upper connector of a twp-stage buckle, a washover pipe is sleeved outside the spear salvage rod and is connected with a male thread of the upper connector of the twp-stage buckle, a side hole runner is arranged at the lower end of the upper connector of the twp-stage buckle to enable the centre of the upper connector of the twp-stage buckle to be communicated with a hohlraum between the washover pipe and the spear salvage rod, a sectioning slip is sleeved on the spear salvage rod, a center runner is arranged in the center of the spear salvage rod, and the lower end of the washover pipe is manufactured to a cemented carbide washover shoe. The washover inversely-buckled salvage cylinder completes covering milling and inversely-buckled salvage at one time, improves efficiency of salvage operation, reduces overhaul operation cost and overcomes the problem that the covering milling and the inversely-buckled salvage are completed through two working procedures, labor intensity caused by unloading washover and salvage pipe column is big, and operation efficiency of a sand blocking well is seriously influenced.

Description

A kind of cover is washed the back-off fishing socket

Technical field:

The utility model relates to a kind of horizontal well tubing fishing junk device, and particularly a kind of cover is washed the back-off fishing socket.

Background technology:

At present, the salvaging operation is simple behind the horizontal well tubing junk sand card, but labour intensity is big; The work progress trouble at first is that washover pipe washes the annular space silt particle down, is lowered to reversing tool then; Drag for activity behind the top of fish of obtaining or back-off and propose the tubing string that blocked, generally need repeatedly repeat same operation.Because cover is washed and salvaged through two operations and accomplishes, the workman rises to trap and washes with fishing string labour intensity greatlyyer, has a strong impact on the sanding in well operating efficiency.

The utility model content:

The technical problem that the utility model will solve provides a kind of cover and washes the back-off fishing socket, and this fishing socket has realized that cover mills, back-off is salvaged once and accomplished, and improves fishing efficient, reduces the heavy repair task cost.Overcome that existing cover is washed, fishing is to accomplish through two operations, the workman rises to trap and washes with fishing string labour intensity greatly, has a strong impact on the deficiency of sanding in well operating efficiency.

The technical scheme that the utility model is taked is: a kind of cover is washed the back-off fishing socket, comprises washover pipe, drags for the lance bar, distinguish slips, keyway and milling shoe; Dragging for lance bar upper end is connected with the box that twin-stage is buckled joint; Washover pipe is enclosed within and drags for lance bar outside and be connected with pin thread that twin-stage is buckled joint; Twin-stage is buckled the joint lower end and is had the side opening runner and make twin-stage buckle joint center and washover pipe and the annular space that drags between the lance bar is connected; The distinguish slip sleeve is contained in and drags on the lance bar, drags for lance bar center and has center flow channels, and the milling shoe of carbide alloy is processed in the washover pipe lower end.

The beneficial effect of the utility model is: the utility model since adopted twin-stage buckle joint with washover pipe with drag for the lance bar and combine, thereby have that cover mills, back-off is salvaged one step completed function, improved fishing efficient, reduced the heavy repair task cost.

Description of drawings:

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation.

Accompanying drawing is the structural representation of the utility model.

The specific embodiment:

Shown in accompanying drawing, a kind of cover is washed the back-off fishing socket, comprises washover pipe 3, drags for lance bar 4, distinguish slips 5, keyway 6 and milling shoe 8; Dragging for lance bar 4 upper ends is connected with the box that twin-stage is buckled joint 1; Washover pipe 3 is enclosed within and drags for lance bar 4 outsides and be connected with pin thread that twin-stage is buckled joint 1; Twin-stage is buckled joint 1 lower end and is had side opening runner 2 and make twin-stage buckle joint 1 center and washover pipe 3 and the annular space that drags between the lance bar 4 is connected; Distinguish slips 5 is sleeved on and drags on the lance bar 4, drags for lance bar 4 centers and has center flow channels 7, and the milling shoe 8 of carbide alloy is processed in washover pipe 3 lower ends.

During the utility model work; Through left-hand screw drill pipe with the utility model G.I.H, at milling shoe 8 during apart from fish one segment distance, the beginning direct flushing; Flushing fluid gets in drill string; Get in the washover pipe 3 through side opening runner 2 and center flow channels 7, arrive milling shoe 8 then, well-flushing limit, milling shoe 8 limit is transferred the guiding fish and is got in the washover pipe 3; Other smallclothes junk of milling shoe 8 contact down-holes also cuts the smallclothes junk and the annular space silt particle, along with the deep flushing of milling shoe 8 shake out pipe laying class and all silt particles of casing annulus; When dragging for lance bar 4 and touch the tubing top of fish, the silt particle in the center flow channels 7 flushing fish chambeies drags for lance bar 4 descending the time, and distinguish slips 5 is being pushed away up by the fish mouth and compression distinguish slips 5, makes in its undergauge entering fish chamber; Transfer drilling rod and be hampered behind the abundant well-flushing, fishing string is carried in examination, and it is up to drag for lance bar 4; Drag for lance bar 4 male cone (strobilus masculinus)s and contact, force the distinguish slips 5 stuck inwall that obtains pipe that drags for of slip insert that swells, get final product engaging fish with distinguish slips 5 inner conical surfaces; Drag for can up and downly keep a grip on after obtaining or energetically on carry and separate the desanding card; If can not unfreezing, just take the back-off measure to salvage the fish that cover comes out, continue to take same operation to pull whole sand card tubing strings out then.

It is understandable that; More than about the specific descriptions of the utility model; Only be used to the utility model is described and be not to be subject to the described technical scheme of the utility model embodiment; Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model, to reach identical technique effect; As long as satisfy the use needs, all within the protection domain of the utility model.

Claims

1. a cover is washed the back-off fishing socket, comprises washover pipe (3), drags for lance bar (4), distinguish slips (5), keyway (6) and milling shoe (8); It is characterized in that: drag for lance bar (4) upper end and be connected with the box that twin-stage is buckled joint (1); Washover pipe (3) is enclosed within and drags for lance bar (4) outside and be connected with pin thread that twin-stage is buckled joint (1); Twin-stage is buckled joint (1) lower end and is had side opening runner (2) and make twin-stage buckle joint (1) center and washover pipe (3) and the annular space that drags between the lance bar (4) is connected; Distinguish slips (5) is sleeved on and drags on the lance bar (4); Drag for lance bar (4) center and have center flow channels (7), the milling shoe (8) of carbide alloy is processed in washover pipe (3) lower end.