CN2881071Y

CN2881071Y - Multipurpose well pigging gauge

Info

Publication number: CN2881071Y
Application number: CN 200520031772
Authority: CN
Inventors: 杨相杰; 王辉; 史红青; 陈永清; 吴安沙
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-05
Filing date: 2005-09-05
Publication date: 2007-03-21
Anticipated expiration: 2015-09-05

Abstract

The utility model discloses a multifunction drift size gauge tool, which comprises an upper connection and a main body, wherein the upper connection is welded together with the main body. An outer pipe wall of the main body is provided with a wide pitch auger groove, which can scrape the wax, burr, scale deposit and cement residual on the inner wall of the casing pipe, and squeeze the wax, burr, scale deposit and cement residual on the inner wall of the casing pipe into the wide pitch auger groove and make them fall down into the shaft, the lower part of the main body is connected with a pear-shaped polishing cutter head, the outer surface of the pear-shaped polishing cutter head is welded with an alloy block. When the pit shaft requires small-scaled sand washing and milling treatment, the alloy block on the pear-shaped polishing cutter head can loosen the hard sand surface to wash the sand and mill under the action of the drilling pressure and torque. The sand gravels and crumbs produced by the sand washing and milling can come out of the pit shaft along with the liquid flow through the wide pitch auger groove on the main body. In the normal shaft clearing process, the utility model can decrease the accident risk of the driller being blocked at the time of shaft clearing and scraping, reduce the times to hoist and lower the driller and improve the construction efficiency.

Description

A kind of multipurpose drift size gauge tool

Technical field: the utility model relates to a kind of multipurpose drift size gauge tool, belongs to oilfield oil well production technique field, when particularly doing the pit shaft preparation, is used for the downhole tool technical field of drifting.

Background technology: at present, the on-the-spot drift size gauge tool that uses in the oil field is the common thickened steel-tube that an external diameter is slightly less than the oil well casing internal diameter, function singleness, there is following defective in the on-the-spot use: can only play the effect that detects casing inner diameter, if internal surface of sleeve pipe has incrustation scale, the cement residue, burr etc., will bit freezing, need trip out drift size gauge tool, be lowered to the casing section mill cover and mill, after cover has milled, descend drift size gauge tool again; When if chance sand production or oil well casing distortion, undergauge etc. cause bit freezing, also trip out drift size gauge tool again, be lowered to milling shoe, tube expander of nib or repairing casing etc., so repeated lower tubular column, not only efficient is low, and personnel labor intensity is big, and the wearing and tearing of oil pipe have been aggravated, the operating cost height, long in time limit, influence oil well yield.

Summary of the invention: the purpose of this utility model be overcome in the background technology drift size gauge tool function singleness that detects the Casing Failure internal diameter defective, that designs can carry out scraping, sand washing, milling to down-hole casing, effectively improves a kind of multipurpose drift size gauge tool of job execution effect.

The utility model is made up of top connection, body, and top connection and body are welded as a whole, and has the widely-pitched helicla flute on the body outer tube wall, and its lower end is welded with alloy block by the pyriform milling head that is threaded on the pyriform milling head external surface.

When doing the pit shaft preparation, after being threaded on top connection of the present utility model and the oil pipe, be lowered in the pit shaft, but the paraffin on the widely-pitched helicla flute scraping internal surface of sleeve pipe on the body outer tube wall, burr, incrustation scale, cement residue etc., burr on the internal surface of sleeve pipe, incrustation scale, cement residue etc. are clamp-oned in the widely-pitched helicla flute and crossheading falls in the well, alleviated the bit freezing degree to a certain extent, for unfreezing provides activity space; When pit shaft need carry out small-scale sand washing, milling processing, alloy block on the pears type milling head at the pressure of the drill, turn round and take off the hard sand face of pine under the effect of refusing and carry out sand washing, milling, sand grains, chip that sand washing, milling produce can be by the widely-pitched helicla flute on the body along returning out pit shaft on the liquid stream; In addition, milling head adopts pears type structure, has the advantage of pears type tube expander, can pause to the slight undergauge of sleeve pipe expand, the milling repair process, in normal drifting process, in the time of reducing drifting, scraping, the lock of tool drilling risk that takes place, avoid having repeated, bore down, effectively improve the job execution effect, reduce personnel labor intensity, reduction of erection time, reduce operating cost, prolong the oil well production time relatively, improve oil well output.

Description of drawings:

Fig. 1 is the utility model structural representation.

The specific embodiment: the utility model is described further below in conjunction with accompanying drawing:

By accompanying drawing 1 as can be known, the utility model is made up of top connection 1, body 3, has widely-pitched helicla flute 2 on the outer tube wall of body 3, and its lower end is welded with alloy block 5 by the pyriform milling head 4 that is threaded on pyriform milling head 4 external surfaces.

When doing the pit shaft preparation, after being threaded on top connection 1 of the present utility model and the oil pipe, be lowered in the pit shaft, but the paraffin on the widely-pitched helicla flute 2 scraping internal surface of sleeve pipe on body 3 outer tube walls, burr, incrustation scale, cement residue etc., burr on the internal surface of sleeve pipe, incrustation scale, cement residue etc. are clamp-oned widely-pitched helicla flute 2 interior also crossheadings to be fallen in the well, alleviated the bit freezing degree, for unfreezing provides activity space; When pit shaft need carry out small-scale sand washing, milling processing, on the pears type milling head 4 alloy block 5 at the pressure of the drill, turn round and take off the hard sand face of pine under the effect of refusing and carry out sand washing, milling, sand grains, chip that sand washing, milling produce can be by the widely-pitched helicla flute on the body 32 along returning out pit shaft on the liquid stream; In addition, milling head 4 adopts pears type structure, has the advantage of pears type tube expander, can pause to the slight undergauge of sleeve pipe expand, the milling repair process, in normal drifting process, lock of tool drilling risk in the time of reducing drifting, scraping, reduce and repeated, bored down number of times, improve the job execution effect.

Claims

1, a kind of multipurpose drift size gauge tool, form by top connection (1), body (3), top connection (1) is welded as a whole with body (3), it is characterized in that, on the outer tube wall of body (3), have widely-pitched helicla flute (2), its lower end is welded with alloy block (5) by the pyriform milling head (4) that is threaded on pyriform milling head (4) external surface.