CN201100102Y

CN201100102Y - Rotary type milling sand-washing pen point

Info

Publication number: CN201100102Y
Application number: CNU2007200156195U
Authority: CN
Inventors: 董晓斌; 陶煜征; 于广鹏; 徐小国
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2007-11-02
Filing date: 2007-11-02
Publication date: 2008-08-13
Anticipated expiration: 2017-11-02

Abstract

The utility model relates to a milling sand washing pen point which is used for oil and water well sand washing operations, the milling sand washing pen point is composed of a joint, a bearing, a lock pin, a bearing lock, a packing ring, a milling head, a hydraulic blade and a washing pipe, wherein the bearing and the bearing lock are arranged outside the upper portion of the washing pipe, the packing ring is arranged between the bearing lock and the washing pipe, the joint is sleeved outside the bearing, the lower end of the joint is connected with the bearing lock through the lock pin, the hydraulic blade is arranged on the outer wall inside the washing pipe, and the milling head is welded on the lower end. The milling sand washing pen point of the utility model has novel structure and double functions of sand washing and milling, the milling sand washing pen point is utilized to mill hard sand faces, the sand washing operations can be smoothly finished, the sand washing efficiency can be increased in particular for horizontal well sand washing, the operational time is shortened, and good economical benefits are obtained.

Description

Rotary milling sand washing nib

Technical field:

The utility model relates to a kind of downhole tool that is used for oil, well sand washing operation, belongs to petroleum well workover power tool class.

Background technology:

Along with oil field development and prolongation oily, the well production time, cumulative adding of sand output well a few days,, the situation of shaking out is on the rise, and sand washing work operations amount constantly increases.The sand washing nib is the down-hole special tool that oil, well sand washing operation are adopted usually.At present, the sand washing nib of field by using does not have rotation milling function, in the sand washing operation process, the sand washing nib is connected G.I.H with oil pipe or drilling rod, spurt sand liquid penetrates with certain flow rate from the sand washing nib by oil pipe under the ground pump truck effect, and sand washing face makes its loose flowing.This kind sand washing nib is comparatively suitable for loose sand face, but such as the hard sand of the glued formation of sand faces such as heavy oil wells, then be difficult to impulsion, drill bit outfit power slewing or instrument bore broken going out with hard sand under needing this moment, thereby the lower tubular column number of times is increased, activity duration prolongs, and cost increases.

The utility model content:

The purpose of this utility model is to provide a kind of tubing string that can reduce when having the hard sand of milling function, flushing concurrently to remove number of times, improve work efficiency, shorten the rotary milling sand washing nib of oil, well sand washing activity duration.

The utility model is to realize like this.This kind sand washing nib is made up of joint, washing pipe, bearing, bearing lock, lock pin, sealing ring, waterpower blade and milling head, and the washing pipe upper outside is provided with bearing and bearing lock, is provided with sealing ring between bearing lock and the washing pipe; The bearing outside is set with joint, the joint lower end be connected by lock pin between bearing is locked; The washing pipe inside and outside wall is provided with the waterpower blade, and the lower end weldering studs with milling head.

During sand washing, this milling sand washing nib being connected oil pipe or drilling rod lower end in well by joint, circulates with pump truck in ground, sand cleaning fluid penetrates to the sand washing nib through tubing string, act on the waterpower blade and to produce revolving force and make the washing pipe rotation, loose sand is dashed by liquid stream, goes out ground.When the sand gluing was harder, liquid flowed towards motionless.At this moment, the milling head of this sand washing nib contacts with hard sand face and carries out milling, and hard sand is bored broken going out.For the horizontal well sand washing, the sand at drill bit place easily deposition is difficult for dashing, and uses rotary milling sand washing nib sand setting can be stirred, and improves sand washing efficient.

The utility model novel structure has sand washing and milling function concurrently, utilizes it can the hard sand face of milling, finishes the sand washing operation smoothly, especially more can improve sand washing efficient for the horizontal well sand washing, shortens the activity duration, obtains good economic benefit.

Description of drawings:

Accompanying drawing is a structural representation of the present utility model.

The specific embodiment:

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.

As shown in the figure, the utility model is made up of joint 1, bearing 2, lock pin 3, bearing lock 4, sealing ring 5, milling head 6, waterpower blade 7 and washing pipe 8, its structure, assembled relation are as follows: washing pipe 8 upper outside are provided with bearing 2 and bearing lock 4, are provided with sealing ring 5 between bearing lock 4 and the washing pipe 8; Bearing 2 outsides are set with joint 1, are connected by lock pin 3 between joint 1 lower end and the bearing lock 4; Washing pipe 8 inside and outside walls are provided with waterpower blade 7, and the lower end weldering studs with milling head 6.Wherein, joint 1 upper end is provided with the internal thread that matches with oil pipe or drilling rod lower end external screw thread, and the lower end is provided with to be connected and fixed with bearing lock 4 uses lockpin hole.Bearing 2 places in washing pipe 8 outsides and joint 1 gap, plays flexibly and reduce the rotation frictional resistance.Waterpower blade 7 shape in the shape of a spiral is welded on washing pipe 8 inside and outside walls, produces revolving force under flow action washing pipe 8 and milling head 6 are rotated together.Milling head 6 adopts the YG carbide alloy to make, and is torus, takes electric welding welding or brazing to splice in washing pipe 8 lower ends.Washing pipe 8 upper ends are provided with the spacing round platform of using of bearing, and the bottom tube wall is provided with helical form waterpower blade 7.

Claims

1, a kind of rotary milling sand washing nib, form by joint (1), bearing (2), lock pin (3), bearing lock (4), sealing ring (5), milling head (6), waterpower blade (7) and washing pipe (8), it is characterized in that: washing pipe (8) upper outside is provided with bearing (2) and bearing lock (4), is provided with sealing ring (5) between bearing lock (4) and the washing pipe (8); Bearing (2) outside is set with joint (1), and joint (1) lower end is locked between (4) with bearing and is connected by lock pin (3); Washing pipe (8) inside and outside wall is provided with waterpower blade (7), and the lower end weldering studs with milling head (6).