CN2580098Y

CN2580098Y - Oil pipe grinding and cutting device

Info

Publication number: CN2580098Y
Application number: CN 02247029
Authority: CN
Inventors: 詹景峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-31
Filing date: 2002-07-31
Publication date: 2003-10-15
Anticipated expiration: 2012-07-31

Abstract

The utility model relates to an oil pipe grinding cutting device for repairing wells in oilfields, which is composed of an upper joint, a spacing pin, a conical body, grinding cutting teeth, a spring seat, a spring, an outer body and a lower joint, wherein, the lower part of the upper joint is connected with the upper part of the outer body; the spacing pin is arranged under threads on the upper part of the outer body; the conical body, the grinding cutting teeth, the spring seat and the spring are arranged below the spacing pin inside the outer body. The spring seat is arranged under the conical body; the spring on a spring surface is contacted and connected with the male cone of the conical body via a dovetail groove and a dovetail key. The grinding cutting teeth arranged aligning window grooves on the outer body can slide on the conical body. The utility model has the advantages that in accidents of the clamped lower parts of well drilling pipe columns and oil pumping pipe columns, the oil pipe grinding cutting device is used for cutting the clamped pipe columns from the upper parts, and then the pipe columns are salvaged up from cutting parts, so that the clamped pipe columns can be easily lifted out from wells, so as to reach the goals of reducing operating time and cost.

Description

The oil pipe mill is cut device

One, technical field

The utility model relates to the oil pipe mill that the well workover of a kind of oil field uses and cuts device, belongs to engineering goods.

Two, background technology

In recovering the oil in the oil field, the accident that the flow string bottom is blocked often appears.The interior tubing string of well can't propose after this accident occurring, if adopt big power-equipment hard draw, can break from a certain position of tubing string, then the tubing string more than the fracture location is proposed, hard draw again after descending fishing string that the stuck pipe post of remainder is dragged for again, break behind the tubing string and again the tubing string more than the fracture location is proposed, and then fishing string down, just the stuck pipe post all might be proposed in well after repeating repeatedly.Address this is that the way that also adopts back-off sometimes, this way need repeat repeatedly just the stuck pipe post all might be proposed in well equally.Address this is that the way that also adopts the firepower cutting sometimes at the scene, firepower cutting cost height, complicated operation, when hole condition was complicated, the firepower cutting can not be used.

Three, summary of the invention

The purpose of this utility model is that a kind of oil pipe mill of design is cut device, when the accident of being blocked the flow string bottom occurring, use this oil pipe mill to cut device, from stuck pipe post top tubing string is cut open, from the cut place tubing string is salvaged then, thereby very simple the stuck pipe post is proposed in well, reduce the activity duration, reduce operating cost.

The purpose of this utility model is achieved in that it is made up of top connection, position-limitting pin, cone, incisal grinding, spring base, spring, ectosome, lower contact.The top connection bottom connects with ectosome top, under the screw thread of ectosome top position-limitting pin is installed, and under the inner position-limitting pin of ectosome cone, incisal grinding, spring base, spring is installed.Spring base is under the cone, and spring is under the spring base, and spring is placed in the lower contact, and lower contact is connected in the ectosome bottom.The window groove that incisal grinding is installed is arranged on the ectosome, and incisal grinding awl medial surface contacts with the cone male cone (strobilus masculinus), and is connected by dovetail groove, dovetail key mutually, and the window groove that incisal grinding is aimed on the ectosome is installed.Incisal grinding can slide on cone.Under the screw thread of ectosome top discharge orifice is arranged.

The utility model is connected in hollow roofbolt bottom, and extend on the stuck point of stuck pipe post inside, squeezes into liquid in hollow roofbolt, and hollow roofbolt internal pressure is raise, and when pressure is higher than operating pressure, regulates pressure by the discharge orifice on the ectosome.Pressure acts on the cone, makes cone descending, and the compression spring made the spring stored energy when cone was descending.Under the conical surface effect of the conical surface of cone and incisal grinding, incisal grinding is extrapolated, teeth on the incisal grinding are contacted with the stuck pipe column wall, rotate hollow roofbolt, make oil pipe mill of the present utility model cut the device rotation, because the teeth hardness on the incisal grinding is higher than the hardness of being cut oil pipe, therefore, under turning effort, just oil pipe can be cut off.After stuck pipe post quilt was cut open, the pressure in the hollow roofbolt of emptying was pushing away on cone under the effect of spring stored energy, under the conical surface effect of the conical surface of cone and incisal grinding incisal grinding was regained.Whole operations have just been finished after again the tubing string of cutting open being pulled out.

The beneficial effects of the utility model are: when the accident of being blocked the flow string bottom occurring, use this oil pipe mill to cut device, from stuck pipe post top tubing string is cut open, from cutting tubing string is salvaged then, thereby very simple the stuck pipe post is proposed in well, can reach and reduce the activity duration, reduce the purpose of operating cost.

Four, description of drawings

Accompanying drawing is the utility model general structure half sectional view.

In the drawings: the 1st, top connection, the 2nd, position-limitting pin, the 3rd, cone, the 4th, incisal grinding, the 5th, spring base, the 6th, spring, the 7th, ectosome, the 8th, lower contact.Be that the utility model is made up of top connection 1, position-limitting pin 2, cone 3, incisal grinding 4, spring base 5, spring 6, ectosome 7, lower contact 8.

Five, the specific embodiment

As shown in the figure, top connection 1 bottom connects with ectosome 7 tops, and position-limitting pin 2 is installed under the ectosome 7 top screw threads, and cone 3, incisal grinding 4, spring base 5, spring 6 are installed under the ectosome 7 inner position-limitting pins 2.Spring base 5 is under the cone 4, and spring 6 is under the spring base 5, and spring 6 is placed in the lower contact 8, and lower contact 8 is connected in ectosome 7 bottoms.The window groove that incisal grinding 4 is installed is arranged on the ectosome 7, and incisal grinding 4 awl medial surfaces contact with cone 3 male cone (strobilus masculinus)s, and are connected by dovetail groove, dovetail key mutually, and the window groove that incisal grinding 4 is aimed on the ectosome 7 is installed.Incisal grinding 4 can slide on cone 3.Under the ectosome 7 top screw threads discharge orifice is arranged.

The utility model is connected in hollow roofbolt bottom, and extend on the stuck point of stuck pipe post inside, squeezes into liquid in hollow roofbolt, and hollow roofbolt internal pressure is raise, and when pressure is higher than operating pressure, regulates pressure by the discharge orifice on the ectosome 7.Pressure acts on the cone 3, makes cone 3 descending, and compression spring 6 made spring 6 stored energies when cone 3 was descending.Under the conical surface effect of the conical surface of cone 3 and incisal grinding 4 with incisal grinding 4 extrapolations, teeth on the incisal grinding 4 are contacted with the stuck pipe column wall, rotate hollow roofbolt, make oil pipe mill of the present utility model cut the device rotation, because the teeth hardness on the incisal grinding 4 is higher than the hardness of being cut oil pipe, therefore, under turning effort, just oil pipe can be cut off.After the stuck pipe post is cut out, pressure in the hollow roofbolt of emptying, pushing away on cone 3 under the effect of spring 6 stored energies, under the conical surface effect of the conical surface of cone 3 and incisal grinding 4, incisal grinding 4 is being regained, just finishing whole operations after again the tubing string of cutting open being pulled out.

Claims

1, the oil pipe mill that the well workover of a kind of oil field is used is cut device, by top connection (1), position-limitting pin (2), cone (3), incisal grinding (4), spring base (5), spring (6), ectosome (7), lower contact (8) is formed, it is characterized in that: top connection (1) bottom connects with ectosome (7) top, under the screw thread of ectosome (7) top position-limitting pin (2) is installed, cone (3) is installed under the inner position-limitting pin of ectosome (7) (2), incisal grinding (4), spring base (5), spring (6), spring base (5) is under the cone (3), spring (6) is under the spring base (5), spring (6) is placed in the lower contact (8), and lower contact (8) is connected in ectosome (7) bottom.

2, oil pipe mill according to claim 1 is cut device, it is characterized in that: the window groove that installation incisal grinding (4) is arranged on the ectosome (7), incisal grinding (4) awl medial surface contacts with cone (3) male cone (strobilus masculinus), and is connected by dovetail groove, dovetail key mutually, and the window groove that incisal grinding (4) is aimed on the ectosome (7) is installed.

3, oil pipe mill according to claim 1 is cut device, it is characterized in that: under the screw thread of ectosome (7) top discharge orifice is arranged.