CN205908272U - Anti -sticking pyriform junk mill - Google Patents

Abstract

The utility model relates to an oil drilling workover sleeve pipe repair technology field, an anti -sticking pyriform junk mill, it includes that upper portion is the junk mill body of frustum form, the inside of junk mill body is equipped with the irrigation channel that from the top down can cross water, lower part an organic whole of junk mill body is equipped with wide narrow direction frustum down, it is equipped with the banding lug of at least three length to follow the equal interval of circumference on junk mill body and direction frustum, every lug all is fixed with alloy steel along the axial, direction frustum bottom is fixed with the cavity lower clutch of being connected with the drilling string, form exterior angle alpha between direction frustum bottom and the lower clutch, exterior angle alpha's value range is 3 to 10. The utility model has the advantages of reasonable and compact structure, it is through improving current junk mill, carries out the chamfer with pyriform junk mill upper portion and handles, and sticking of tool phenomenon when effectively avoiding the sleeve pipe elastically returning to appear even the light instrument of lifting also can be realized to the damaged position of sleeve pipe return, effectively avoids causing engineering accident, has reduced the device structure cost.

Description

Anti-sticking pyriform junk mill

Technical field

This utility model is related to oil drilling workover treatment casing repair technology field, is a kind of anti-sticking pyriform junk mill.

Background technology

During the pyriform junk mill repairing casing repair using at present, bit freezing phenomenon often occurs.Bit freezing is mainly former to be Existing pyriform milling shoe tool has step in top in design, easily passes through during repairing casing, if repairing the flexible return of rear sleeve When situation occurs, instrument cannot rise out and cause bit freezing, and difficulty of construction rises or even causes oil-water well to scrap.

Content of the invention

This utility model provides a kind of anti-sticking pyriform junk mill, overcomes the deficiency of above-mentioned prior art, it can effectively solve Certainly existing pyriform junk mill exists and elastic recoil during repairing casing and easily cause bit freezing, increases the problem of difficulty of construction.

The technical solution of the utility model is realized by following measures: a kind of anti-sticking pyriform junk mill, including top Junk mill body in up-narrow and down-wide frustum, the inside of described junk mill body is provided with the irrigation channel that can cross water from top to bottom, mill The portion integral of shoes body is provided with guiding frustum wide at the top and narrow at the bottom, is circumferentially all interval with junk mill body and guiding frustum The projection of at least three strips, each projection is respectively and fixedly provided with steel alloy vertically, and described guiding frustum bottom is fixed with and bores The hollow lower contact that post connects, forms exterior angle α between guiding frustum bottom and lower contact, the span of described exterior angle α is 3 ° To 10 °.

Further optimization and/or improvements to above-mentioned utility model technical scheme are presented herein below:

Axial length between the top of above-mentioned junk mill body, the bottom of junk mill body and guiding frustum three sequentially becomes ratio Example distribution, described ratio is 3:2:2.

Exterior angle described above is 5 °.

It is threadably secured between frustum bottom described above and lower contact and link together.

Steel alloy described above is welded on projection.

This utility model reasonable and compact in structure, easy to use, it passes through to improve existing junk mill, and pyriform junk mill is carried out Chamfered, is prevented effectively from the bit freezing phenomenon that sleeve pipe occurs during elastic recoil, even if casing damage position return is also capable of Easily above carry instrument, be prevented effectively from and cause engineering accident, reduce maintenance of equipment cost.

Brief description

Accompanying drawing 1 is the main structure diagram of this utility model most preferred embodiment.

It is junk mill body that coding in accompanying drawing is respectively as follows: 1, and 2 is irrigation channel, and 3 is projection, and 4 is steel alloy, and 5 is guiding Frustum, 6 is lower contact, and α is exterior angle.

Specific embodiment

This utility model is not limited by following embodiments, can according to the technical solution of the utility model and practical situation Lai Determine specific embodiment.

In this utility model, for the ease of description, the description of the relative position relation of each part is all according to description The Butut mode of accompanying drawing 1 being described, such as: the position relationship of forward and backward, upper and lower, left and right etc. is according to Figure of description Butut direction determining.

With reference to embodiment and accompanying drawing, this utility model is further described:

As shown in Figure 1, this anti-sticking pyriform junk mill includes the junk mill body 1 that top is in up-narrow and down-wide frustum, described mill The inside of shoes body 1 is provided with the irrigation channel 2 that can cross water from top to bottom, and the portion integral of junk mill body 1 is provided with wide at the top and narrow at the bottom Guiding frustum 5, is circumferentially all interval with the projection 3 of at least three strips on junk mill body 1 and guiding frustum 5, each Projection 3 is respectively and fixedly provided with steel alloy 4 vertically, and described guiding frustum 5 bottom is fixed with the hollow lower contact 6 being connected with drill string, leads Form exterior angle α between frustum 5 bottom and lower contact 6, the span of described exterior angle α is 3 ° to 10 °.When actually used, Being arranged to the gentle angle close to level between guiding frustum 5 and lower contact 6 is to preferably solve to go out in repairing casing Existing elastic recoil causes the phenomenon of bit freezing, it is to avoid engineering accident, effectively increases work efficiency.Here junk mill body 1 Internal irrigation channel 2 is the hydrodynamic cleaning passage 2 of through type from top to bottom it is ensured that well workover milling well process is unimpeded；Junk mill is originally On body 1 middle part projection 3, fixing strip steel alloy 4 is mainly used in scraping the debris in decannulation, easy to operate, improves work Efficiency.

According to actual needs above-mentioned anti-sticking pyriform junk mill can be made further optimization and/or improvements:

As shown in Figure 1, between the top of described junk mill body 1, the bottom of junk mill body 1 and guiding frustum 5 three Length is in sequentially pro rate, and described ratio is 3:2:2.Here the bottom of junk mill body and guiding frustum 5 are arranged to identical Length be able to better profit from guide the guide effect of frustum 5 and avoid the bit freezing that sleeve pipe occurs during elastic recoil existing As.

As shown in Figure 1, described exterior angle α is 5 °.Here exterior angle α being arranged to 5 ° is to be better protected from card Bore, effect more preferably becomes apparent from, facilitate staff to construct, improve production work efficiency.

As shown in Figure 1, it is threadably secured between described frustum 5 bottom and lower contact 6 and link together.Here, lead to Cross threaded convenient dismounting, be convenient to clean this debris within junk mill body 1, improve work efficiency.

As shown in Figure 1, described steel alloy 4 is welded on projection 3.By the steel alloy 4 of strip is welded on projection 3 On be in order to fixing more firm, remove during debris using more convenient.

Above technical characteristic constitutes most preferred embodiment of the present utility model, and it has stronger adaptability and optimal enforcement Effect, can increase and decrease non-essential technical characteristic according to actual needs, to meet the demand of different situations.

Claims (9)

1. a kind of anti-sticking pyriform junk mill is it is characterised in that include the junk mill body that top is in up-narrow and down-wide frustum, described junk mill The inside of body is provided with the irrigation channel that can cross water from top to bottom, and the portion integral of junk mill body is provided with guide cone wide at the top and narrow at the bottom Platform, is circumferentially all interval with the projection of at least three strips, each projection is vertically on junk mill body and guiding frustum Be respectively and fixedly provided with steel alloy, described guiding frustum bottom is fixed with the hollow lower contact being connected with drill string, guiding frustum bottom with Form exterior angle α, the span of described exterior angle α is 3 ° to 10 ° between joint.

2. anti-sticking pyriform junk mill according to claim 1 is it is characterised in that the top of described junk mill body, junk mill body Axial length sequentially proportional distribution between bottom and guiding frustum three, described ratio is 3:2:2.

3. anti-sticking pyriform junk mill according to claim 1 and 2 is it is characterised in that described exterior angle is 5 °.

4. anti-sticking pyriform junk mill according to claim 1 and 2 is it is characterised in that lead between described frustum bottom and lower contact Crossing is screwed links together.

5. anti-sticking pyriform junk mill according to claim 3 is it is characterised in that pass through between described frustum bottom and lower contact It is screwed and link together.

6. anti-sticking pyriform junk mill according to claim 1 and 2 is it is characterised in that described steel alloy is welded on projection.

7. anti-sticking pyriform junk mill according to claim 3 is it is characterised in that described steel alloy is welded on projection.

8. anti-sticking pyriform junk mill according to claim 4 is it is characterised in that described steel alloy is welded on projection.

9. anti-sticking pyriform junk mill according to claim 5 is it is characterised in that described steel alloy is welded on projection.