CN208280910U - Naked eye sieve tube completion horizontal well is for the outer mud of pipe and acidification integral process tubing string - Google Patents

Abstract

The utility model discloses naked eye sieve tube completion horizontal wells for outer mud and acidification integral process tubing string is managed, including from bottom to top sequentially connected flushing valve sealing plug, under multidirectional centralizer, tubing nipple, upper multidirectional centralizer, for slurry be acidified drag device.Described to be arranged 20 sets for slurry acidification drag device, 20 sets pass sequentially through chamfering oil pipe concatenation for slurry acidification drag device, i.e., each to be all connected with chamfering oil pipe for slurry acidification drag device both ends.The chamfering oil pipe upper end of the top passes through safety joint connection construction tubing string.The utility model is able to achieve one-trip string and can be completed for slurry, acidification technique, and using effect is ideal.

Description

Naked eye sieve tube completion horizontal well is for the outer mud of pipe and acidification integral process tubing string

Technical field

The utility model relates to naked eye sieve tube completion flow string during oil exploitation, specifically naked eye screen casing is complete Well water horizontal well is for the outer mud of pipe and acidification integral process tubing string.

Background technique

In recent years in the block development process of oil field, naked eye sieve tube completion horizontal well is a kind of relatively new complete well development Mode is of great significance to thin layer reservoir exploitation is solved.Due to needing lower naked eye sieve tube completion after the completion of well-drilling borehole, in order to Guarantee naked eye screen casing it is normal under in place, need early period to adjust mud property, by circulation after bore hole inside wall formed mud cake Protective layer keeps barefoot interval wellbore stability, does not collapse, not chip off-falling.But stable mud cake protective layer needs after lower naked eye screen casing Thoroughly removing can just be such that oil well normally produces, this is protected before just needing horizontal well to go into operation for the outer mud of pipe and acidification to release mud cake Sheath.

Utility model content

The purpose of this utility model is to provide naked eye sieve tube completion horizontal wells for outer mud and acidification integral process is managed Tubing string, being able to achieve one-trip string can be completed for slurry, acidification technique, and using effect is ideal.

In order to achieve the above objectives, the utility model uses following technical solution, and naked eye sieve tube completion horizontal well is for pipe Outer mud and acidification integral process tubing string, including from bottom to top sequentially connected flushing valve sealing plug, under multidirectional centralizer, Tubing nipple, upper multidirectional centralizer are acidified drag device for slurry.

Described to be arranged 20 sets for slurry acidification drag device, 20 sets pass sequentially through chamfering oil pipe concatenation for slurry acidification drag device, i.e., It is each to be all connected with chamfering oil pipe for slurry acidification drag device both ends.

The chamfering oil pipe upper end of the top passes through safety joint connection construction tubing string.

Described to be acidified drag device for slurry as a solid cylinder, both sides have female thread to connect chamfering oil pipe, and outer diameter is less than Casing inner diameter 6-8mm.

The utility model has the advantages that compared with prior art

The utility model is sequentially connected flushing valve sealing plug, the multidirectional centralizer of Φ 150mm, 2m oil pipe from lower end to upper end Pipe nipple, the multidirectional centralizer of Φ 150mm are constituted for slurry acidification 20 sets of the chamfering oil pipe of drag device+1, safety joint and operating tool string； It is able to achieve one-trip string and can be completed for slurry, acidification technique, and using effect is ideal.

Detailed description of the invention

Fig. 1 is the naked eye sieve tube completion horizontal well of the utility model for the outer mud of pipe and acidification integral process tubular column structure Schematic diagram.

In figure: flushing valve sealing plug 1, under multidirectional centralizer 2, tubing nipple 3, upper multidirectional centralizer 4, for slurry acidification increase Hinder device 5, chamfering oil pipe 6, safety joint 7, operating tool string 8.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, the utility model provides a kind of technical solution: naked eye sieve tube completion horizontal well is for the outer mud of pipe and acid Change integral process tubing string, including from bottom to top sequentially connected flushing valve sealing plug 1, under multidirectional centralizer 2, tubing nipple 3, upper multidirectional centralizer 4, for slurry acidification drag device 5.Described to be arranged 20 sets for slurry acidification drag device, 20 sets for slurry acidification drag device Pass sequentially through the concatenation of chamfering oil pipe 6, i.e., it is each to be all connected with chamfering oil pipe for slurry acidification drag device both ends.The chamfering oil of the top Pipe upper end passes through safety joint connection construction tubing string.

Described to be acidified drag device for slurry as a solid cylinder, both sides have female thread to connect chamfering oil pipe, and outer diameter is less than Casing inner diameter 6-8mm.

It is short that multidirectional centralizer 2,2m oil pipe under installation flushing valve sealing plug 1, Φ 150mm are sequentially connected from lower end to upper end It saves multidirectional centralizer 4 on 3, Φ 150mm, constituted for slurry acidification drag device 5, chamfering oil pipe 6, safety joint 7, operating tool string 8.On The interconnection for stating various parts is connected by screw thread type.It is arranged 20 sets for slurry acidification drag device 5, for slurry acidification drag device 5 It is connected between any two with chamfering oil pipe.

After process pipe string is down toward well-flushing valve position, well head pressurization 60-80KN opens well washing apparatus, completes construction early period The preparation of tubing string.

The first step is pumped into 60 side of flushing fluid from oil sets annular space, and flushing fluid, which is met, changes flow direction for after slurry acidification drag device 5 Enter oil reservoir again from for slurry acidification 5 rear end sleeve pipe of drag device, so still secondary the past from for slurry acidification 5 front end screen casing of drag device Repeatedly 20 times backward, for the mud outside naked eye screen casing out.

Second step is pumped into acid fluid system from oil sets annular space again, and the method such as first step carries out acidification removing and is attached to well The mud cake of intraocular wall enables oil reservoir normally to go out liquid production.

In the description of the present invention, it should be understood that temporald eixis or positional relationship are based on the figure Orientation or positional relationship is merely for convenience of description the utility model, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (4)

1. naked eye sieve tube completion horizontal well is for managing outer mud and be acidified integral process tubing string, which is characterized in that including from lower Upper sequentially connected flushing valve sealing plug, under multidirectional centralizer, tubing nipple, upper multidirectional centralizer, for slurry acidification drag device.

2. naked eye sieve tube completion horizontal well according to claim 1 is for the outer mud of pipe and is acidified integral process tubing string, It is characterized in that, described to be arranged 20 sets for slurry acidification drag device, 20 sets pass sequentially through chamfering oil pipe concatenation for slurry acidification drag device, i.e., It is each to be all connected with chamfering oil pipe for slurry acidification drag device both ends.

3. naked eye sieve tube completion horizontal well according to claim 2 is for the outer mud of pipe and is acidified integral process tubing string, It is characterized in that, the chamfering oil pipe upper end of the top passes through safety joint connection construction tubing string.

4. naked eye sieve tube completion horizontal well according to claim 1 or 2 or 3 is for the outer mud of pipe and acidification integral process pipe Column, which is characterized in that described to be acidified drag device for slurry as a solid cylinder, both sides have female thread to connect chamfering oil pipe, outside Diameter is less than casing inner diameter 6-8mm.