CN2761831Y

CN2761831Y - Well cementation swirler

Info

Publication number: CN2761831Y
Application number: CN 200520088952
Authority: CN
Inventors: 喻晨; 李敏; 朱太辉
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2005-01-10
Filing date: 2005-01-10
Publication date: 2006-03-01
Anticipated expiration: 2015-01-10

Abstract

The utility model relates to a well cementing swirler used for injecting cement paste for cementing wells in swirling flows in oil fields and oil-water wells, which is mainly composed of an outer tube, an inner tube and a spiral flow channel, wherein the inner tube of the spiral flow channel of the well cementing swirler is provided with a liquid inlet hole, the outer tube is provided with a liquid outlet hole and the inner tube is arranged in the outer tube and screwed tightly with screws connected with other tubes by the outer tube. The utility model solves the problem of poor displacing effect of cement paste existing in the prior art. In the process of stage cementing cement paste injecting operation in oil fields and oil-water wells, the well cementing swirler can be used in combination with a swirl centralizer so as to enhance the displacing effect of cement paste obviously. The utility model can be used in stage cementing cement paste injecting operation in oil fields and oil-water wells.

Description

The well cementation cyclone

Technical field:

The utility model relates to a kind of well cementation cyclone of oilfield oil well eddy flow cementing slurry usefulness.

Background technology:

What adopted in the operation of present domestic oilfield oil well eddy flow cementing slurry is to use vortex sub or eddy flow centralizer, all is on conventional centralizer basis, and spinning disk is installed.In the cementing slurry displacement process, produce eddy flow, improve the cementing strength that replaces effect and interface.Because existing decline of cement paste kinetic energy in annular space, its eddy flow that produces when flowing through the eddy flow centralizer is descended to the cleaning function of the borehole wall, cement paste replaces weak effect, for this reason, developing a kind of well cementation cyclone is used in combination with existing eddy flow centralizer to make in the cementing slurry displacement process better to improve and replaces effect.

The utility model content:

In order to overcome the deficiency of cement paste replacement weak effect in the prior art, the utility model provides a kind of well cementation cyclone, be used in combination with the eddy flow centralizer with it and can effectively improve cement paste and replace effect, and have the bonding quality that significantly improves cement and the sleeve pipe and the borehole wall.

The technical scheme that its technical problem that solves the utility model adopts is: mainly be can produce eddy flow when considering to allow mud pass through the cyclone runner when cyclone design, therefore, the runner of cyclone is selected spirality for use, promptly in inner and outer pipes, be provided with the spiral helicine runner of cyclone, be provided with the inlet opening that links to each other with the cyclone runner on inner pipe, on outer tube, be provided with the fluid hole that links to each other with the cyclone runner, interior pipe put into outer tube hold out against with the screw thread that other pipe links to each other with outer tube.During use, the cyclone of will cementing the well is connected on the well cementation sleeve pipe bottom, with sleeve pipe G.I.H together, cement paste flows into cyclone from the inlet opening of interior pipe, the fluid hole that flow to outer tube along helical flow path flows out, because the cement paste runner that inner and outer pipe is asked is a helical form, cement paste produces eddy flow when cyclone flows through, thereby realizes the eddy flow well cementation.

The beneficial effects of the utility model are: this well cementation hydrocyclone structure is simple, is used in combination cement paste with the eddy flow centralizer with it and replaces better effects if.Cement paste one enters annular space can produce eddy flow, can more effectively replace mud, improves cementing quality.

Description of drawings:

Fig. 1 is an overall structure schematic diagram of the present utility model.

Fig. 2 is that inner and outer pipe boundary of the present utility model is cut back eddy flow runner schematic diagram open.

Among the figure 1, outer tube, 2, interior pipe, 3, runner.

The specific embodiment:

In Fig. 1, this well cementation cyclone comprises outer tube 1, interior pipe 2, runner 3.In outer tube 1, interior pipe 2, be respectively equipped with going out of being connected with cyclone spiral flow channel 3, inlet opening, be provided with the inlet opening that is connected with the cyclone runner on inner pipe, on outer tube, be provided with the fluid hole that links to each other with the cyclone runner, interior pipe 2 is put into outer tube 1 usefulness outer tube hold out against with the screw thread that other pipe links to each other, or with interior pipe 2 and outer tube 1 welding.

In Fig. 2, the eddy flow runner expanded view that skewed slot is cut open for the inner and outer pipe boundary, runner is the spirality chute.

Claims

1, a kind of well cementation cyclone, comprise outer tube (1), interior pipe (2), runner (3), it is characterized in that: in outer tube (1), interior pipe (2), be respectively equipped with going out of being connected with cyclone spiral flow channel (3), inlet opening, be provided with the inlet opening that is connected with the cyclone runner on inner pipe, on outer tube, be provided with the fluid hole that is connected with the cyclone runner, interior pipe (2) is put into outer tube (1) hold out against with the screw thread that other pipe links to each other with outer tube, or with interior pipe (2) and outer tube (1) welding.