CN201209423Y

CN201209423Y - Oilfield workover treatment cement squeeze device

Info

Publication number: CN201209423Y
Application number: CNU2008200134398U
Authority: CN
Inventors: 管恩东; 邓小鹏; 于慧; 张春茹; 范学伟
Original assignee: Liaohe Petroleum Exploration Bureau
Current assignee: Liaohe Petroleum Exploration Bureau
Priority date: 2008-06-13
Filing date: 2008-06-13
Publication date: 2009-03-18
Anticipated expiration: 2018-06-13

Abstract

The utility model relates to an oil water maintaining device used in the oil field, in particular to an ash squeezing device for the well repairing operation used in the oil field, which belongs to the extractive industry. The oil water maintaining device is composed of a well head device, an ash squeezing pipe column, a manual bottom hole and a sleeve, wherein displacement fluid, mortar with a bridge plug and pre-posed fluid are filled into the ash squeezing pipe column; bridge plug agent and the mortar are contained in a perforated interval on the wall of the sleeve and in an outer stratum, and the well head device is communicated with a ground mortar stirring tank through a high-pressure pipeline, and the displacement fluid is composed of fresh water and retardant. Because the displacement fluid, the mortar with the bridge plug and the pre-posed fluid are filled and matching devices are arranged in the ash squeezing pipe column of the oil water maintaining device, the oil well stratum with severe leakage loss can be plugged to avoid the problems that the cement is leaked and oil layer channels are plugged, thereby the used retardant can also ensure the construction security.

Description

A kind of oil well repairing operation squeezes apparatus for ash

Technical field:

The utility model belongs to extractive industry oilfield oil well maintenance unit, and especially a kind of oil well repairing operation squeezes apparatus for ash.

Background technology:

At present oil-water well carry out the shutoff envelope generally adopt when scurrying simple in the device adding cement paste and improve the cement additive method of performance on a small quantity, these devices are transplanted from the oil drilling well shaft fixing technology and are come, because it is poor to form the shut-off capacity of cement paste, can not form at suitable position effectively and stop up, cause the once construction shutoff success rate of oil field shutoff operation to be had only about 30%, other utilizes cement paste to comprise the A level, G level and superfine cement slurry carry out the shutoff mode, annotate apparatus for ash and have this type of problem equally, can not effectively satisfy the on-the-spot needs that layer shutoff of leakiness lost territory and envelope are scurried.

The utility model content:

The purpose of this utility model is in order to overcome above-mentioned shortcoming, and a kind of oil well repairing operation that provides squeezes apparatus for ash, utilize this device to contain the mortar that bridging plug agent mortar and retarding agent are mixed with in adding in the mortar stirring pool, after being squeezed in the oil well it in stratum, can form strong blocking ability, stop up effect raising oil-water well shutoff efficient thereby increase, prolong effective duration of congestion.

Technical scheme:

The task of Ti Chuing for achieving the above object, for this reason the utility model adopted comprise wellhead assembly, squeeze grey tubing string, artificial bottom of a well, sleeve pipe form; In the described crowded grey tubing string displacement fluid is housed from top to bottom, contains the bridging plug mortar, prepad fluid includes the agent of part bridging plug in the stratum of well-case perforating well section outside.The described wellhead assembly of mortar is connected with ground mortar stirring pool by high pressure line.

Described prepad fluid is mud, contain the bridging plug mortar is that dry cement, clear water, foam quartz powder mixture are formed, and displacement fluid is made up of clear water, retarding agent.

The utility model is finished by following working method:

During use, at first carry out the drifting operation by this device, keep unimpeded in the well, carry out anti-flushing well then, clear water is injected into well from sleeve pipe and crowded ash pipe band of column shape space, greasy dirt on the borehole wall is gone out from squeezing grey tubing string internal return, and then in the cement that mixes, add a certain amount of bridging plug agent mortar and retarding agent, carry out the direct circulation operation, quantitative prepad fluid is injected into squeezes in the grey tubing string, and then agent of cement bridging plug and the retarding agent of preparing in the mortar stirring pool be injected in the stratum, promote subsequently and squeeze grey tubing string to certain position, replace out unnecessary mortar.Just can finish the task on cementing plugging leakage stratum.

Because the utility model has adopted by the fluid column and the corollary apparatus thereof that squeeze displacement fluid in the grey tubing string, contain bridging plug agent mortar, prepad fluid is formed, carry out shutoff to missing in the serious oil well stratum, can avoid cement to stop up the phenomenon generation of oil reservoir passage in formation leakage or appearance, this device also can utilize retarding agent control to the cement solidifies the time, guarantees construction safety.

Description of drawings:

Accompanying drawing 1 is the utility model structural representation.

Among the figure by 1, wellhead assembly, 2, high pressure line, 3, the mortar stirring pool, 4, displacement fluid, 5, contain the bridging plug mortar, 6, prepad fluid, 7, perforated interval, 8, the artificial bottom of a well, 9, squeeze grey tubing string, 10, sleeve pipe forms.

The specific embodiment:

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.

Wellhead assembly 1 is the operation well mouth of oil well in the accompanying drawing, connecting a high pressure line 2 by the high pressure line valve, this pipeline leads in the mortar stirring pool 3, the mortar stirring pool is that square metal trough is the apparatus of job site preparation mortar, displacement fluid 4 is clear water and retarding agent liquid, as pushing the liquid that injects in the oil well, bridging plug mortar 5 is by dry cement, clear water, retarding agent, the foam quartz powder mixture is formed, when prepad fluid 6 is the mud reservoir plugging, aforesaid liquid or mortar are respectively put in the mortar stirring pool, and then be injected in the oil well by ground pump truck and high pressure line 2, thereby the mortar 5 that will contain the bridging plug agent according to the injection order again is injected into and carries out in the stratum missing serious oil well plugging.

Sleeve pipe 10 specifications 5 1/2 in the accompanying drawing " be oil well casing, squeezing grey tubing string 9 is 2 1/2 " oil pipe, perforated interval 7 referred to herein as the corresponding with it shutoff stratomere of sleeve pipe 10 perforated intervals, are carrying out the shutoff work layer, and this shutoff stratomere includes bridging plug agent mortar 5.

Claims

1, a kind of oil well repairing operation squeezes apparatus for ash, comprises by wellhead assembly (1), crowded grey tubing string (9), artificial bottom of a well (8), sleeve pipe (10) forming; It is characterized in that displacement fluid (4) is housed in the described crowded grey tubing string (9) from top to bottom, contain bridging plug agent mortar (5), prepad fluid (6), perforated interval (7) in sleeve pipe (10), the outside includes part bridging plug agent mortar (5) in the stratum, and described wellhead assembly (1) is connected with ground mortar stirring pool (3) by high pressure line (2).