CN201982076U - Jet-pressurizing combined high-efficiency sand blower - Google Patents

Abstract

Translated fromChinese

本实用新型提供了一种射压联作的高效喷砂器，属于石油开采增产措施领域。本喷砂器包括所述喷砂器本体（6）为圆柱体管状结构；在喷砂器本体（6）的管壁上开有三排安装孔，其中第二排位于第一排和第三排之间；第一排和第三排包括四个安装孔，每排的四个安装孔对称均布在圆周上；第二排包括两个安装孔，两个安装孔对称均布在圆周上；相邻两排的孔在圆周上交错均布；高效喷砂器上安装的喷嘴的总数为2、4、6、8或10个。相邻两排孔之间的距离为50.0mm。利用本喷砂器，既能充分发挥喷嘴的作用，减少喷嘴射流间的干扰，又能提高喷嘴的寿命和连续施工能力。一趟管柱可以完成2-3段施工，加砂能力可以的达到80-90.0m³；提高连续作业能力200%-300%。

The utility model provides a high-efficiency sand blaster combined with injection and pressure, which belongs to the field of measures for increasing oil production. The sand blaster includes that the sand blaster body (6) is a cylindrical tubular structure; three rows of installation holes are opened on the tube wall of the sand blaster body (6), and the second row is located in the first row and the third row between; the first row and the third row include four installation holes, and the four installation holes in each row are symmetrically distributed on the circumference; the second row includes two installation holes, and the two installation holes are symmetrically distributed on the circumference; Two adjacent rows of holes are evenly distributed in a staggered manner on the circumference; the total number of nozzles installed on the high-efficiency sand blaster is 2, 4, 6, 8 or 10. The distance between two adjacent rows of holes is 50.0mm. By using the sand blaster, the function of the nozzles can be brought into full play, the interference between jets of the nozzles can be reduced, and the service life and continuous construction ability of the nozzles can be improved. One string can complete 2-3 stages of construction, and the sand adding capacity can reach 80-90.0m³ ; the continuous operation capacity can be increased by 200%-300%.

Description

A kind of efficient sandblaster of pressing connection to do of penetrating

Technical field

The utility model belongs to oil exploitation well stimulation field, is specifically related to a kind of efficient sandblaster of pressing connection to do of penetrating.

Background technology

The hydraulic sand blasting fracturing technique is to utilize the hydraulic jet perforation that Bernoulli equation grows up and the fracturing technique of the effective combination of sand fracturing, because of not being with characteristics such as the packing of packer negative pressure, fixed point construction, construction safety, obtained abroad using widely after growing up in 1998, existing at present thousands of mouthfuls of wells adopt this technology to carry out segmentation sand fracturing or acid fracturing construction.Hydraulic blast is the key tool that is used for abrasive perforating and sand fracturing, is made of sandblaster body and nozzle and spray orifice plug.Conventional sandblaster body is a cylinder cast structure, opens 2-4 row installing hole on the body, and every row is along 180 °, 120 a ° circumferential distribution 2-3 hole, and the orientation in hole staggers between every adjacent two rows, disposes nozzle quantity when following well operations as required.The domestic in recent years hydraulic sand blasting fracturing tool of also having succeeded in developing, and carried out test at the scene and used, but the ubiquity nozzle erosion is serious, even the phenomenon that comes off of nozzle, row's nozzle in the middle of particularly on the sandblaster, damage situations is particularly serious, and a row in the middle of nozzle comes off and concentrates on causes present hydraulic sand blasting pressure break to add sand small scale (20-30.0m³), continuous pressing crack construction ability, one-trip string only can be constructed one section.

Prior art adopts centre one to arrange usually and puts 4 nozzles, and the mode of 2 nozzles is arranged at two ends respectively, adds sand 18.5 m³After, the maximum hole enlargement 40% of middle row's nozzle, even nozzle comes off.One-trip string only can be constructed one section.

Find after utilizing Fluid Mechanics Computation (CFD) method to study different hole distribution mode flow field and pressure field, the pattern of spiral three row's nozzles, middle row's injection stream speed is higher than two ends (as shown in Figure 1), potential core's length the longest (as shown in Figure 2), and the effluxvelocity decay is slower, two symmetrical negative pressure districts are arranged between the nozzle, at negative pressuren zone fluid reflux is arranged, simultaneously, the impact pressure maximum (as shown in Figure 2) of intermediate noxzzle, in the case, the intermediate noxzzle effluxvelocity of bearing is the highest, the pressure maximum, time is long, and therefore the nozzle in the middle of is impaired easily.

In the prior art, the patent No. a kind of sand jet perforator that has been 200820109255 patent disclosure, it has described the mechanism of sand jet perforator, pattern on the body and structure of nozzle, material and mounting means, but nozzle usage quantity and method for arranging during not mentioned down well operations.

The patent No. be 200810105643 patent disclosure packer packing multi-layer hydropower abrasive perforating and fracturing integrated technique, it has described packer packing multi-layer hydropower abrasive perforating and fracturing integrated technique, is applied to the oil gas well multilayer perforation and the pressure break of petroleum casing pipe completion.Tubing string comprises oil pipe, safety joint, hydraulic ejector, K344 or Y344 packer, ball-and-seat, screen casing and plug.Its course of work is: hydraulic blast is lowered into the perforating depth that needs, lower floor carried out hydraulic jet perforation by direct circulation, and after sleeve pipe is finished perforation, the lower floor of jetting pressure break again; After lower floor finishes the jetting pressure break, the anti-kill-job that circulates, on carry and drag tubing string to upper strata perforating and fracturing interval, continue hydraulic jet perforation pressure break upper strata; After finishing, trip out tubing string, be lowered to completion tubular column, product is asked in discharge opeing.Do not need every layer of independent perforation, only need drag the separate stratum fracfturing transformation of oil pipe realization oil gas well multi-section multi-layer.But sandblast usage quantity and method for arranging during the not mentioned underground work of this patent.

Document " down-hole jetting fracturing tool typical structure and application " (oil drilling technology, 2009.12) in introduced formation, construction technology and the characteristics thereof of hydraulic sand blasting frac system, and the application of these two kinds of down-hole hydraulic sand blasting fracturing tools introduced, its applicability has been described.But problems such as the not mentioned sandblaster nozzle arrangements of the document, cloth hole.

Document " jetting staged fracturing optimal design and construction " (oil drilling technology, 2010.06) in set up the Optimization Design of hydraulic sand blasting staged fracturing, provided the matching relationship curve of nozzle quantity and operational discharge capacity and the relation curve of annular pressure and discharge capacity by numerical computations, but problems such as not mentioned sandblaster nozzle arrangements, cloth hole.

Sandblaster is the key tool of abrasive perforating and sand fracturing, and the improper meeting of arrangement of nozzles during following well operations on the sandblaster causes the influence of two aspects: 1. disturb between each jet, influence the jet effect; 2. aggravation nozzle abrasion, even nozzle is come off, cause the construction failure.

The utility model content

The purpose of this utility model is to solve a difficult problem that exists in the above-mentioned prior art, and a kind of efficient sandblaster that the pressure connection is done of penetrating is provided, and can give full play to the effect of nozzle, reduces the interference between injection stream, can improve the life-span and the continuous construction ability of nozzle again.

The utility model is achieved through the following technical solutions:

A kind of efficient sandblaster of pressing connection to do of penetrating comprises sandblaster body 6 and nozzle; Described sandblaster body 6 is a cylinder tubulose structure; Have three row's installing holes on the tube wall of sandblaster body 6, be respectively first row, second row and the 3rd row, wherein second ranking is between first row and the 3rd row.

First row and the 3rd arranges and to include four installing holes, and four installing hole symmetries of every row are distributed on the circumference, is spaced apart 90 ° between last adjacent two installing holes of promptly every row on circumference.

Two installing holes are drawn together in second package, and two installing hole symmetries are distributed on the circumference, are spaced apart 180 ° between promptly adjacent two installing holes on circumference.

Adjacent two rows' installing holes are staggered uniform on circumference, and promptly a row installing hole is equivalent to adjacent row's installing hole rotates 45 ° on circumference.

A nozzle is installed at most in each described installing hole; The nozzle installed adds up to 0 or 2 in second row's the installing hole; The nozzle installed adds up to 0 or 2 or 4 in first row, the 3rd row's the installing hole.

The nozzle of installing on the described efficient sandblaster add up to 2,4,6,8 or 10; When ading up to 2,2 nozzles are installed on arbitrary row are got final product.

As first row or the 3rd row when 2 nozzles are set, 2 nozzles are symmetrically arranged, so that the impact force balance on all directions reduces the tubing string swing.

Distance between adjacent two row's installing holes is 50.0mm.

Compared with prior art, the beneficial effects of the utility model are: use of the present invention penetrate press the efficient sandblaster that connection does after, the abrasion condition of middle row's top nozzle greatly alleviates, one-trip string can be finished the construction of 2-3 section, adds sand 40.7m³, themaximum hole enlargement 5% of nozzle adds the sand ability and can reach 80-90.0m³Disturb between each injection stream little, jet efficient height, light to the abrasion of centre row's nozzle, can effectively improve the nozzle access times, improve the ability 200%-300% that works continuously.

The utility model can be used for independent abrasive perforating, but also abrasive perforating and sand fracturing are integrated.Can be used for the separate stratum fracfturing of straight well and the staged fracturing of horizontal well.The Erdos DAMAGE OF TIGHT SAND GAS RESERVOIRS reserves that exploration is found are very abundant, all have the feature of multilayer, thin layer, improve vertical development degree and must carry out the separate stratum fracfturing transformation, and the hydraulic sand blasting pressure break is a separate stratum fracfturing technological means effectively.Enter Eleventh Five-Year Plan, horizontal well technology is able to quick application, to in December, 2010, China's horizontal well number is above 6000 mouthfuls, along with deepening continuously of exploration and development, hyposmosis horizontal well quantity will constantly increase, and the hydraulic sand blasting pressure break will provide technical support for the horizontal well in segments fracturing reform, and application prospect is very extensive.

Description of drawings

Fig. 1 is the change curve of the injection stream speed of diverse location, and a middle row's injection stream speed is the highest, and it is the slowest to decay.From nozzle diverse location place effluxvelocity difference.

Fig. 2 is the injection stream striograph of diverse location, and a middle row's nozzle potential core length is the longest, and two symmetrical negative pressure districts are arranged between intermediate noxzzle and two ends nozzle, at negative pressuren zone fluid reflux is arranged, and middle nozzle is impacted.

Fig. 3 is the structural representation that the utility model is penetrated the efficient sandblaster of pressing the connection work.Wherein, 1 is nozzle a, and 2 is nozzle b, and 3 is nozzle c, and 4 is nozzle d, and 5 is nozzle e, and 6 is the sandblaster body.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail:

As shown in Figure 3, a kind of efficient sandblaster of pressing connection to do of penetrating comprises sandblaster body 6 and nozzle.

Described sandblaster body 6 is a cylinder tubulose structure; Have three row's installing holes on the tube wall of sandblaster body 6, be respectively first row, second row and the 3rd row, wherein second ranking is between first row and the 3rd row.

Four installing holes are drawn together in first row and the 3rd package, and four installing hole symmetries of every row are distributed on the circumference, are spaced apart 90 ° between last adjacent two installing holes of promptly every row on circumference.

Two installing holes are drawn together in second package, and two installing hole symmetries are distributed on the circumference, are spaced apart 180 ° between promptly adjacent two holes on circumference; Adjacent two rows' hole is staggered uniform on circumference, promptly a row hole is equivalent to an adjacent round and rotates 45 ° on circumference (dotted line among Fig. 3 is the line of nozzle a and e and the line of nozzle c and e, on same circumference, the angle of the line of the line of nozzle a and e and nozzle c and e is 90 °); Total cloth hole count is 10, and the distance between adjacent two rounds is nozzle a and e for 50.0mm(, c and e, b and e, distance between d and the e is 50.0mm), this distance is meant the length of the circle center line connecting in two holes, this length also is the length of an optimization, if length is too little, disturb greatly between the jet, if length is too big, jet converges less than together, length is too big and too little all can to influence jet efficient, must be the length of an optimization therefore.

A nozzle is installed at most in each described installing hole; The nozzle installed adds up to 0 or 2 in second row's the installing hole; The nozzle installed adds up to 0 or 2 or 4 in first row, the 3rd row's the installing hole.

The nozzle of installing on the described efficient sandblaster add up to 2,4,6,8 or 10; When needs were adorned two nozzles, the nozzle of adorning two symmetries in a certain therein round got final product.

As first row or the 3rd row when 2 nozzles are set, 2 nozzles are symmetrically arranged, so that the impact force balance on all directions reduces the tubing string swing.

Arrangement of nozzles method during this time well operations, disturb between each injection stream little, jet efficient height, light to the abrasion of centre row's nozzle, can effectively improve the nozzle access times, improve the ability 200-300% that works continuously.

In order to verify effect of the present utility model, carried out following experiment:

Experiment 1: adopt the test of going into the well of the round of prior art and certain oil field hydraulic sand blasting pressure break that nozzle cloth carries out:

First section pressing crack construction, the cloth nozzle is 8 on this well sandblaster, 4 of middle rows, each 2 of two ends symmetries add sand 18.5 m³After, the maximum hole enlargement 40% of middle row's nozzle; Second section pressing crack construction, the cloth nozzle quantity is identical with first section with mode on the sandblaster, adds sand 25.3 m³After, the maximum hole enlargement 45% of middle row's nozzle.

Experiment 2: certain the oil field hydraulic sand blasting crushing test that adopts device of the present utility model to carry out:

The cloth nozzle is 8 on this well sandblaster, 2 of middle rows, and 4 at an end, 2 of the other ends, three sections of pressure breaks add sand 40.7 m³After, the maximum hole enlargement of middle row's nozzle is no more than 5%.

Technique scheme is a kind of embodiment of the present utility model, for those skilled in the art, on the basis that the utility model discloses application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned specific embodiment of the utility model, therefore previously described mode is just preferred, and does not have restrictive meaning.

Claims (3)

1. penetrate the efficient sandblaster of pressing connection to do for one kind, comprise sandblaster body (6) and nozzle, it is characterized in that:

Described sandblaster body (6) is a cylinder tubulose structure; Have three row's installing holes on the tube wall of sandblaster body (6), be respectively first row, second row and the 3rd row, wherein second ranking is between first row and the 3rd row;

First row and the 3rd arranges and to include four installing holes, and four installing hole symmetries of every row are distributed on the circumference, is spaced apart 90 ° between last adjacent two installing holes of promptly every row on circumference;

Two installing holes are drawn together in second package, and two installing hole symmetries are distributed on the circumference, are spaced apart 180 ° between promptly adjacent two installing holes on circumference;

Adjacent two rows' installing holes are staggered uniform on circumference, and promptly a row installing hole is equivalent to adjacent row's installing hole rotates 45 ° on circumference.

2. the efficient sandblaster of pressing connection to do of penetrating according to claim 1 is characterized in that:

A nozzle is installed at most in each described installing hole; The nozzle installed adds up to 0 or 2 in second row's the installing hole; The nozzle installed adds up to 0 or 2 or 4 in first row, the 3rd row's the installing hole;

The nozzle of installing on the described efficient sandblaster add up to 2,4,6,8 or 10; When ading up to 2,2 nozzles of symmetry installation get final product on arbitrary row.

3. the efficient sandblaster of pressing connection to do of penetrating according to claim 1 and 2 is characterized in that: the distance between adjacent two row's installing holes is 50.0mm.

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