CN2391002Y

CN2391002Y - Self-locking oil pipe centralising device

Info

Publication number: CN2391002Y
Application number: CN 99222314
Authority: CN
Inventors: 张洪才
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-13
Filing date: 1999-09-13
Publication date: 2000-08-09
Anticipated expiration: 2009-09-13

Abstract

The utility model relates to a self-locking oil pipe centering device, which acts on a part between a casing pipe and an oil pipe in an oil well. A self-locking inner cylinder provided with an open slot and a centering outer cylinder provided with a centering dummy club are tightly fixed, cooperated and used at an optional position of the oil pipe via a conic surface screw thread. The self-locking oil pipe centering device has the advantages that structure is simple, use cost is low, installation is convenient, and the utility model is not restricted by an installation position. The utility model is a substitution product of a coupling type centering device.

Description

The self-locking tubing centrilizer

The utility model belongs to the instrument in petroleum recovering operation technique field, particularly a kind of sleeve pipe under the oil well and self-locking tubing centrilizer between the petroleum pipeline of being used for.

The centralizer that existing oil well operation is used mostly is join hoop type centralizer, and its shortcoming shows: the 1st, and complex structure, the 2nd, can only act on the tubing coupling junction, the 3rd, the cost of production height, 4 need use the special-purpose machinery winding device when being to use.Implement for inclined shaft or horizontal well and casing deformation well,, very easily to cause the wearing and tearing of oil pipe and sleeve pipe, and influence the oil well operation quality in the oil well operation process in the oil field if there is not centralizer.

The purpose of this utility model is complex structure, the use problem that the installation site is restricted, cost is high that exists at existing centralizer, proposes a kind of tubing centrilizer of self-locking simply and easily.

The technical solution of the utility model is: the self-locking tubing centrilizer, by self-locking inner core 1 with set upright urceolus 4 two parts and be threaded and form, it is characterized in that: described self-locking inner core 1 is the cylinder that has the opening groove 2 of longitudinal extension, and external surface has the screw thread of certain taper; The described urceolus 4 of setting upright is vertically to have the cylinder of setting upright boss 5 that is no less than more than three, and inner surface has the taper thread that matches with self-locking inner core 1 external surface.

The thick head end that this technical scheme also can be improved to self-locking inner core 1 is provided with and prevents the position-arresting ring 3 that comes off, and is arranged with circular hole 6 at the horizontal axis of position-arresting ring 3, is used for the plug-in mounting boosting-rod.The horizontal axis of setting upright boss 5 of setting upright urceolus 4 is provided with the circular hole 6 identical with self-locking inner core 1.

According to the self-locking tubing centrilizer of technique scheme, obtain following technique effect:

1, solved general centralizer structure complicated problems;

2, this centralizer can be sleeved on the optional position of oil pipe, not limited by tubing length and shape;

3, simple to operate, get final product with artificial suit, need not mechanical device;

4, low cost of manufacture is than existing centralizer cost savings more than 50%.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structure longitudinal section schematic diagram of self-locking tubing centrilizer;

Fig. 2 is the cross sectional representation of self-locking tubing centrilizer.

As shown in Figure 1, with self-locking inner core 1, set upright urceolus 2 and be inserted in respectively at oil pipe, self-locking inner core 1 is placed on the optional position of oil pipe, thick mouthful of end setting upright urceolus 2 is inserted in the thin end of self-locking inner core 1, urceolus 2 is set upright in rotation, and by conical surface threaded engagement, the open slot 2 with self-locking inner core 1 tightens gradually, be fastened on the oil pipe, form self-locking.At last by boosting-rod act on respectively self-locking inner core 1 position-arresting ring 3 circular hole 6 and set upright on the circular hole of setting upright boss 56 of urceolus 2, continue to be torqued-up to user mode.Position-arresting ring 3 is used to prevent to set upright urceolus 2 and infinitely rotates.

Claims

1, a kind of self-locking tubing centrilizer, by self-locking inner core (1) with set upright urceolus (4) two parts and be threaded and form, it is characterized in that: described self-locking inner core (1) is the cylinder of the opening groove (2) that has longitudinal extension, and external surface has the screw thread of certain taper; The described urceolus (4) of setting upright is vertically to have the cylinder of setting upright boss (5) that is no less than more than three, and inner surface has the taper thread that matches with self-locking inner core (1) external surface.

2, according to the self-locking tubing centrilizer of claim 1, it is characterized in that: the thick head end of self-locking inner core (1) is provided with and prevents the position-arresting ring (3) that comes off, and is arranged with circular hole (6) at the horizontal axis of position-arresting ring (3), is used for the plug-in mounting boosting-rod.

3, according to the self-locking tubing centrilizer of claim 1, it is characterized in that: the horizontal axis of setting upright boss (5) of setting upright urceolus (4) is provided with the circular hole (6) identical with self-locking inner core (1).