CN105298441A - Protecting device for wellhead fracturing valve - Google Patents

Protecting device for wellhead fracturing valve Download PDF

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Publication number
CN105298441A
CN105298441A CN201510910223.6A CN201510910223A CN105298441A CN 105298441 A CN105298441 A CN 105298441A CN 201510910223 A CN201510910223 A CN 201510910223A CN 105298441 A CN105298441 A CN 105298441A
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CN
China
Prior art keywords
pressure
valve
fracturing
pressure chamber
protector
Prior art date
Application number
CN201510910223.6A
Other languages
Chinese (zh)
Inventor
张建权
金祖国
阎栋
梅冬琴
Original Assignee
上海神开石油化工装备股份有限公司
上海神开石油设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 上海神开石油化工装备股份有限公司, 上海神开石油设备有限公司 filed Critical 上海神开石油化工装备股份有限公司
Priority to CN201510910223.6A priority Critical patent/CN105298441A/en
Publication of CN105298441A publication Critical patent/CN105298441A/en

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Abstract

The invention discloses a protecting device for a wellhead fracturing valve. The protecting device for the wellhead fracturing valve comprises a protecting device body, an oil-passing guide mechanism and a piston. The bottom of the protecting device body is connected with the fracturing valve. The oil-passing guide mechanism is arranged in the protecting device body, the top of the oil-passing guide mechanism is connected with the fracturing valve, an oil-passing channel is formed in the oil-passing guide mechanism, and fracturing fluid is delivered through the oil-passing channel. The piston is arranged between the protecting device body and the oil-passing guide mechanism, a pressure channel is formed between the piston and the protecting device body and divided into a first pressure cavity and a second pressure cavity at least, the piston can slide along the oil-passing guide mechanism under the changing action of the pressure difference between the first pressure cavity and the second pressure cavity, and then the protecting device for the wellhead fracturing valve is opened or closed. The protecting device for the wellhead fracturing valve has the advantages that the fracturing valve can be protected without influencing the whole drilling and production process, and cost increase caused by frequent valve part replacement is avoided.

Description

A kind of well head pressure break valve protection device

Technical field

The present invention relates to oil-gas mining field, be specifically related to the well head pressure break valve protection device used in a kind of shale gas development fracturing process.

Background technology

Oil, natural gas are still main, the efficient and irreplaceable energy in the world now, along with the demand of countries on petroleum and natural gas resource increases day by day, and the exploitation day-to-day in oil well production increasing, unconventionaloil pool field.

Pressure break is oil well production increasing, one of important process measure of intensified injection of wells and shale gas exploitation, but quartz sand a large amount of in main medium fracturing fluid in fracturing technology, the granular substance confrontation fracturing valve valve pockets such as haydite, valve seat, valve seal, valve plate equivalent damage is very large, often cause the damage of valve, proceed the valve that fracturing work just must change damage, there is very large security risk in online replace with pressure valve frequently, the prolongation of duration and the increase of cost of winning can be caused simultaneously, and also effectively alleviate in the market or the device of the valve damage of avoiding pressure break to cause or equipment.

Summary of the invention

The object of the present invention is to provide a kind of well head pressure break valve protection device, realized in fracturing process the protection that fracturing valve family of power and influence chamber, valve seat, valve plate and seat seal by this device.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

A kind of well head pressure break valve protection device, is characterized in that, it is arranged between fracturing valve and pressure break tree, and described fracturing valve comprises valve pocket and valve seat, and described well head pressure break valve protection device comprises:

Protector body, connects described fracturing valve bottom it;

Cross oily guiding mechanism, it is arranged in described protector body, the pressure break tree described in its top connects, and its inside was provided with oily passage, and fracturing fluid is from crossing oily passage transmission;

Piston, it is arranged on described protector body and crosses between oily guiding mechanism, mineralization pressure passage between itself and described protector body, and described pressure channel is at least divided into the first pressure chamber and second pressure chamber two parts, under the pressure differential change effect of described first pressure chamber and the second pressure chamber, this piston can slide mobile along the oily guiding mechanism of described mistake, realize unlatching or the closedown of well head pressure break valve protection device;

First pressure regulating mechanism, it connects described first pressure chamber;

Second pressure regulating mechanism, it connects described second pressure chamber;

Compression pump, its connect described in the first pressure regulating mechanism or the second pressure regulating mechanism, for injection pressure in the first described pressure chamber or the second pressure chamber.

Above-mentioned well head pressure break valve protection device, wherein:

Be provided with through hole in described protector body, the top of this through hole is provided with step;

The oily guiding mechanism of described mistake is a neck bush, and it has a bushing channel as the oily passage of described mistake, and its seat is on the intrinsic through hole step of described protector.

Above-mentioned well head pressure break valve protection device, wherein:

Described piston is provided with the shaft shoulder, described pressure channel is divided into the first described pressure chamber and second pressure chamber two parts by this shaft shoulder, and the described shaft shoulder is pushed and makes piston slide mobile along the oily guiding mechanism of described mistake under the differential pressure action of the first pressure chamber and the second pressure chamber.

Above-mentioned well head pressure break valve protection device, wherein:

Described mistake oily guiding mechanism top is set to seal with described pressure break and is docked;

Described protector body bottom portion seals with described fracturing valve and docks, and crosses the valve pocket that fracturing valve is stretched in oily guiding mechanism bottom;

Described piston bottom end stretches into the valve pocket of described fracturing valve, and under the differential pressure action of the first pressure chamber and the second pressure chamber, this piston bottom end is movable to the valve seat location of fracturing valve, and now well head pressure break valve protection device is opened.

Above-mentioned well head pressure break valve protection device, wherein:

The bottom of described protector body is provided with API flange, and offers gasket ring groove, for realizing the slitless connection with described fracturing valve;

The top of the oily guiding mechanism of described mistake is provided with standard A PI gasket ring groove, for realizing the slitless connection set with described pressure break.

Above-mentioned well head pressure break valve protection device, wherein:

The first described pressure regulating mechanism and the second pressure regulating mechanism are stop valve.

Above-mentioned well head pressure break valve protection device, wherein:

Be fixedly connected with by jackscrew between described protector body with the oily guiding mechanism of mistake.

The present invention compared with prior art has the following advantages:

1, this device is arranged between pressure break tree and fracturing valve, install and dismantle all very convenient, the protection to pressure break valve can be realized under the prerequisite not affecting whole drilling process, avoid because of the frequent cost increase changed valve parts and cause, reduce the frequency changing damage threshold door part simultaneously, greatly shorten the drilling duration, save cost of winning;

2, this device is easy to operate, be easy to realize, well head outside just can be operated quickly and easily by compression pump, advantages;

3, very convenient when changing the neck bush that easily punching is damaged, by releasing jackscrew, just can change the neck bush contacted with fracturing fluid for a long time easily, making the reusing of device high;

4, this device also can be used on other protection valves or device, and applicability is wide.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present invention;

Fig. 2 is debug features schematic diagram of the present invention;

Fig. 3 is the operating diagram under opening of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.

As shown in Figure 1; A kind of well head pressure break valve protection device, it is arranged between fracturing valve 9 and pressure break tree 10, and described fracturing valve 9 comprises valve pocket and valve seat, and described well head pressure break valve protection device comprises: protector body 2, connects described fracturing valve 9 bottom it; Cross oily guiding mechanism 1, it is arranged in described protector body 2, the pressure break tree 9 described in its top connects, and its inside was provided with oily passage, and fracturing fluid is from crossing oily passage transmission; Piston 4, it is arranged on described protector body 2 and crosses between oily guiding mechanism 1, mineralization pressure passage between itself and described protector body 2, and described pressure channel is at least divided into first pressure chamber 41 and second pressure chamber 42 two parts, under the pressure differential change effect of described first pressure chamber 41 and the second pressure chamber 42, this piston 4 can slide mobile along the oily guiding mechanism 1 of described mistake, realize unlatching or the closedown of well head pressure break valve protection device; First pressure regulating mechanism 8, it connects described first pressure chamber 41; Second pressure regulating mechanism 5, it connects described second pressure chamber 42; Compression pump 6, its connect described in the first pressure regulating mechanism 8 or the second pressure regulating mechanism 5, for injection pressure in the first described pressure chamber 41 or the second pressure chamber 42.

Be provided with through hole in described protector body 2, the top of this through hole is provided with step; The oily guiding mechanism 1 of described mistake is a neck bush, and it has a bushing channel as the oily passage of described mistake, on its through hole step in described protector body 2.

Described piston 4 is provided with the shaft shoulder, described pressure channel is divided into first described pressure chamber 41 and second pressure chamber 42 two parts by this shaft shoulder, and the described shaft shoulder is pushed and makes piston 4 slide mobile along the oily guiding mechanism 1 of described mistake under the differential pressure action of the first pressure chamber 41 and the second pressure chamber 42.

Described mistake oily guiding mechanism 1 top and described pressure break are set 10 and are sealed and dock; Seal with described fracturing valve 9 bottom described protector body 2 and dock, cross the valve pocket that fracturing valve 9 is stretched in oily guiding mechanism 1 bottom; The valve pocket of described fracturing valve 9 is stretched in described piston 4 bottom, and under the differential pressure action of the first pressure chamber 41 and the second pressure chamber 42, this piston 4 bottom is movable to the valve seat location of fracturing valve 9, and now well head pressure break valve protection device is opened.

The bottom of described protector body 2 is provided with API flange, and offers gasket ring groove, for realizing the slitless connection with described fracturing valve 9; The top of the oily guiding mechanism 1 of described mistake is provided with standard A PI gasket ring groove, for realizing the slitless connection setting 10 with described pressure break.

The first described pressure regulating mechanism 8 and the second pressure regulating mechanism 5 are stop valve.

Be fixedly connected with by jackscrew 3 between described protector body 2 with the oily guiding mechanism 1 of mistake.

As shown in Figure 2, before the present invention uses, can debug it; specifically: open the stop valve 5 on protective device and stop valve 8, compression pump 6 is connected on stop valve 5, start to suppress; piston 4 is made to arrive upper position, after pressure stabilisation, stop valve 5 is closed.Confirm that bottom protective device, neck bush 1 and piston 4 two end faces remain basically stable, represent that piston 4 shifts position onto.By the pressure releasing of compression pump 6, pull down compression pump 6, prepare to enter protection device for installing operation.

The present invention when mounted, first, confirms that pressure break valve is in closed condition, then has confirmed the direction of tree-protector, be coated with last layer lubrication oil, more slowly transfer protective device, by its seat above fracturing valve 9 at piston 4 cylindrical place.When transferring protective device, should be noted as far as possible vertically, avoid piston 4 to bend.Confirm the direction of pressure break tree 10 and after installing gasket ring, slowly transferred pressure break tree 10, by its seat on protective device.

After installing, the present invention can be opened pressure break valve is protected, as shown in Figure 3, first, open pressure break valve, slowly open bottom stop valve 5, the pressure of pressure chamber between piston 4 and protector body 2 is released completely; Compression pump 6 is connected on the stop valve 8 on top, and guarantees that this stop valve 8 is in open mode; Start to suppress, after pressure stabilisation, the stop valve 8 connected on protective device top is closed; The pressure releasing of compression pump 6 is pulled down, prepares to enter fracturing work.

Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims (7)

1. a well head pressure break valve protection device, is characterized in that, it is arranged between fracturing valve (9) and pressure break tree (10), and described fracturing valve (9) comprises valve pocket and valve seat, and described well head pressure break valve protection device comprises:
Protector body (2), connects described fracturing valve (9) bottom it;
Cross oily guiding mechanism (1), it is arranged in described protector body (2), pressure break tree (9) described in its top connects, and its inside was provided with oily passage, and fracturing fluid is from crossing oily passage transmission;
Piston (4), it is arranged on described protector body (2) and crosses between oily guiding mechanism (1), mineralization pressure passage between itself and described protector body (2), and described pressure channel is at least divided into the first pressure chamber (41) and the second pressure chamber (42) two parts, under the pressure differential change effect of described first pressure chamber (41) and the second pressure chamber (42), this piston (4) can slide mobile along the oily guiding mechanism of described mistake (1), realize unlatching or the closedown of well head pressure break valve protection device;
First pressure regulating mechanism (8), it connects described first pressure chamber (41);
Second pressure regulating mechanism (5), it connects described second pressure chamber (42);
Compression pump (6), its connect described in the first pressure regulating mechanism (8) or the second pressure regulating mechanism (5), for described the first pressure chamber (41) or the second pressure chamber (42) interior injection pressure.
2. well head pressure break valve protection device as claimed in claim 1, is characterized in that:
Be provided with through hole in described protector body (2), the top of this through hole is provided with step;
The oily guiding mechanism of described mistake (1) is a neck bush, and it has a bushing channel as the oily passage of described mistake, on the through hole step of its seat in described protector body (2).
3. well head pressure break valve protection device as claimed in claim 2, is characterized in that:
Described piston (4) is provided with the shaft shoulder, described pressure channel is divided into described the first pressure chamber (41) and the second pressure chamber (42) two parts by this shaft shoulder, and the described shaft shoulder is pushed under the differential pressure action of the first pressure chamber (41) and the second pressure chamber (42) that piston (4) is slided along the oily guiding mechanism of described mistake (1) is mobile.
4. well head pressure break valve protection device as claimed in claim 2, is characterized in that:
The oily guiding mechanism of described mistake (1) top is set (10) and is sealed and dock with described pressure break;
Described protector body (2) bottom seals with described fracturing valve (9) docks, and crosses the valve pocket that fracturing valve (9) are stretched in oily guiding mechanism (1) bottom;
The valve pocket of described fracturing valve (9) is stretched in described piston (4) bottom; under the differential pressure action of the first pressure chamber (41) and the second pressure chamber (42); this piston (4) bottom is movable to the valve seat location of fracturing valve (9), and now well head pressure break valve protection device is opened.
5. well head pressure break valve protection device as claimed in claim 4, is characterized in that:
The bottom of described protector body (2) is provided with API flange, and offers gasket ring groove, for realizing the slitless connection with described fracturing valve (9);
The top of the oily guiding mechanism of described mistake (1) is provided with standard A PI gasket ring groove, for realizing the slitless connection setting (10) with described pressure break.
6. well head pressure break valve protection device as claimed in claim 1, is characterized in that:
Described the first pressure regulating mechanism (8) and the second pressure regulating mechanism (5) are stop valve.
7. the well head pressure break valve protection device as described in claim 1 or 4, is characterized in that:
Be fixedly connected with by jackscrew (3) between described protector body (2) with the oily guiding mechanism of mistake (1).
CN201510910223.6A 2015-12-10 2015-12-10 Protecting device for wellhead fracturing valve CN105298441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510910223.6A CN105298441A (en) 2015-12-10 2015-12-10 Protecting device for wellhead fracturing valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510910223.6A CN105298441A (en) 2015-12-10 2015-12-10 Protecting device for wellhead fracturing valve

Publications (1)

Publication Number Publication Date
CN105298441A true CN105298441A (en) 2016-02-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510910223.6A CN105298441A (en) 2015-12-10 2015-12-10 Protecting device for wellhead fracturing valve

Country Status (1)

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CN (1) CN105298441A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201412106Y (en) * 2009-05-31 2010-02-24 中国石油化工股份有限公司 Well-head protector
US20110108275A1 (en) * 2009-11-12 2011-05-12 Vetco Gray Inc. Wellhead isolation protection sleeve
CN202249899U (en) * 2011-09-22 2012-05-30 中国石化集团江汉石油管理局井下测试公司 Pressure isolating device for wellhead production tree
CN205172516U (en) * 2015-12-10 2016-04-20 上海神开石油化工装备股份有限公司 Well head fracturing valve protection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201412106Y (en) * 2009-05-31 2010-02-24 中国石油化工股份有限公司 Well-head protector
US20110108275A1 (en) * 2009-11-12 2011-05-12 Vetco Gray Inc. Wellhead isolation protection sleeve
CN202249899U (en) * 2011-09-22 2012-05-30 中国石化集团江汉石油管理局井下测试公司 Pressure isolating device for wellhead production tree
CN205172516U (en) * 2015-12-10 2016-04-20 上海神开石油化工装备股份有限公司 Well head fracturing valve protection device

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