CN211737113U - Sand fracturing wellhead protector - Google Patents
Sand fracturing wellhead protector Download PDFInfo
- Publication number
- CN211737113U CN211737113U CN202020149750.6U CN202020149750U CN211737113U CN 211737113 U CN211737113 U CN 211737113U CN 202020149750 U CN202020149750 U CN 202020149750U CN 211737113 U CN211737113 U CN 211737113U
- Authority
- CN
- China
- Prior art keywords
- well head
- sealing
- fracturing
- pipe
- central sleeve
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 230000001012 protector Effects 0.000 title claims abstract description 27
- 239000004576 sand Substances 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 241000191291 Abies alba Species 0.000 claims abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Abstract
The utility model provides a sand fracturing well head protector. Relates to the technical field of oil field fracturing. The flange nut is connected with a lead screw, a central sleeve is hermetically connected with inner holes of upper and lower vertical pipe sections of the cross joint through two sealing sections, a long hole is formed in the wall of the central sleeve, the lower part of the central sleeve is connected with a sealing short section and an oil pipe hanger through a ring in a hard sealing manner, and the oil pipe hanger is hermetically connected with the big cross joint of the Christmas tree through a conical surface; the horizontal pipes on two sides of the four-way are respectively connected with a ball valve. The utility model discloses following beneficial effect has: two seal sections of center sleeve pipe are sealed with cross horizontal segment and well head and the upper portion of lower part respectively and are opened, thereby separate well head protector and oil recovery well head and come, the piston plays pressure balance's effect, make fracturing pipeline and the intraoral pipeline pressure of well head the same, reduce the risk that each seal section of well head protector leaked, improve well head protector's life, a plurality of slot holes are as fracturing inlet channel, the fracturing bore has been improved, make and add sand fracturing operation and go on smoothly.
Description
The technical field is as follows:
the utility model belongs to the technical field of the oil field fracturing technique and specifically relates to a sand fracturing well head protector adds.
Background art:
in the later stage of oil and gas field development, some old wells and low-pressure-level wells need to be fractured and acidized to increase production so as to have economic exploitation value, but the working pressure required by the fracture acidizing operation is generally higher than the working pressure of well head equipment, and for the wells meeting the pressure level, the well head device is exposed in acid liquor for a long time, and certain erosion and corrosion can be caused to the well head device, so that a well head fracture protector is needed to be used in the fracture acidizing operation process. The well head fracturing protector can play the isolation to the wellhead assembly in the operation process, and fracturing fluid directly enters into the pit shaft through the wellhead protector without passing through the wellhead assembly, can effectually protect the wellhead assembly to avoid damaging, therefore the research of wellhead protector has very high using value to fracturing, acidizing yield-increasing operation, and current wellhead protector aperture is little, can only carry out ordinary acidizing fracturing operation, can not carry out the fracturing operation of adding sand.
The utility model has the following contents:
in order to solve the problem, the utility model provides a sand fracturing well head protector.
The technical scheme of the utility model is that: a sand fracturing well head protector comprises a cross joint, wherein a flange at the lower part of the cross joint is connected with a main valve of a Christmas tree in a sealing manner, a flange at the upper part of the cross joint is connected with a flange nut, the flange nut is connected with a lead screw in a T-shaped threaded manner, the upper part of the lead screw is processed into a square head shape, a central sleeve at the lower part of the lead screw is connected with inner holes of upper and lower vertical pipe sections of the cross joint in a sealing manner through two sealing sections, a plurality of long holes are formed in the pipe wall between the two sealing sections of the central sleeve, the lower part of the central sleeve is connected with a sealing short section in a hard sealing manner through a circular ring;
the horizontal pipes on two sides of the four-way are respectively connected with a ball valve in a sealing way through flanges, and the horizontal pipe section of the four-way is provided with a pressure gauge.
A communicating pipe is arranged on one horizontal pipe section of the four-way valve and communicated with an inner cavity of a main valve of the Christmas tree, a piston and a gate valve are arranged in the communicating pipe, and the piston is in clearance fit connection with an inner hole of the communicating pipe through a sealing ring.
The diameter of the communicating pipe section where the piston is located is larger than that of the communicating pipe, and the pipe section is connected with the communicating pipe in a sealing mode through a flange.
The utility model discloses following beneficial effect has: through rotating the square head, the lead screw reciprocates, it reciprocates to drive central sleeve pipe, well head and upper portion seal with cross horizontal segment and lower part are come respectively to two sealed sections of central sleeve pipe, central sleeve pipe lower part is sealed with sealed nipple joint, sealed nipple joint is sealed with the tubing hanger, thereby separate wellhead protector and oil recovery well head, the piston plays and separates the liquid medium in the upper and lower intraductal piston, pressure balance's effect, make fracturing pipeline and the intraoral pipeline pressure of well head the same, reduce wellhead protector's pressure and the intraoral pressure differential of the well head of being separated, reduce the risk that each sealed section of wellhead protector leaked, improve wellhead protector's life, a plurality of slot holes are as fracturing inlet channel, the fracturing bore is cut, make the fracturing operation of adding sand fracturing go on smoothly.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1-four-way joint, 2-central sleeve, 3-flange nut, 4-square head, 5-lead screw, 6-long hole, 7-Christmas tree main valve, 8-sealing short section, 9-oil pipe hanger, 10-communicating pipe, 11-piston, 12-gate valve, 13-ball valve, 14-pressure gauge, 15-sealing section and 16-Christmas tree big four-way joint are adopted.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1, the sand fracturing wellhead protector comprises a cross joint 1, wherein a flange at the lower part of the cross joint 1 is hermetically connected with a main valve 7 of a Christmas tree, a flange nut 3 is connected with a flange at the upper part of the cross joint 1, a screw 5 is connected with the flange nut 3 in a T-shaped threaded manner, the upper part of the screw 5 is processed into a square head shape 4, a central sleeve 2 at the lower part of the screw 5 is hermetically connected with inner holes of upper and lower vertical pipe sections of the cross joint 1 through two sealing sections 15, a plurality of long holes 6 are formed in the pipe wall between the two sealing sections 15 of the central sleeve 2, the lower part of the central sleeve 2 is hermetically connected with a sealing short section 8 through a circular ring, the lower part of the sealing short section 8 is hermetically connected with an oil pipe hanger;
the horizontal pipes on the two sides of the four-way joint 1 are respectively connected with a ball valve 13 in a sealing way through flanges, and the horizontal pipe section of the four-way joint 1 is provided with a pressure gauge 14.
The lead screw 5 moves up and down by rotating the square head 4 to drive the central sleeve 2 to move up and down, two sealing sections 15 of the central sleeve 2 respectively seal the horizontal section of the cross joint 1 with the wellhead and the upper part of the lower part, the lower part of the central sleeve 2 is sealed with the sealing short section 8, and the sealing short section 8 is sealed with the tubing hanger 9, so that the wellhead protector and the oil extraction wellhead are separated.
A communicating pipe 10 communicated with the inner cavity of the Christmas tree main valve 7 is arranged on one horizontal pipe section of the four-way joint 1, a piston 11 and a gate valve 12 are arranged in the communicating pipe 10, and the piston 11 is in clearance fit connection with the inner hole of the communicating pipe 10 through a sealing ring.
The connecting pipe section where the piston 11 is located has a larger diameter than the communicating pipe 10, and the pipe section is connected with the communicating pipe 10 in a sealing manner through a flange to prevent the piston 11 from falling out of the communicating pipe 10.
Piston 11 plays and separates the intraductal liquid medium in piston 11 upper and lower, piston 11 is along with the pressure change simultaneously, reciprocate, make the pressure balance in cross 1 and the production tree main valve 7, make fracturing pipeline and the intraoral pipeline pressure of well the same, reduce the pressure of well head protector and by the intraoral pressure differential of spaced apart well, reduce the risk that each seal section of well head protector leaked, improve well head protector's life, a plurality of slot holes are as fracturing inlet channel, the fracturing bore has been improved, make the fracturing operation of adding sand go on smoothly.
When the device is actually used, the Christmas tree main valve 7 and the gate valve 12 of the communicating pipe 10 are closed, the ball valves 13 on two sides of the four-way 1 are closed, the four-way 1 is installed on the Christmas tree main valve 7, the Christmas tree main valve 7 is opened, the lead screw 5 moves downwards under the action of the flange nut 3 by rotating the square head 4 until the lower end of the central casing 2 and the sealing short section 8 generate hard sealing, the square head 4 stops rotating, the gate valve 12 of the communicating pipe 10 is opened, a fracturing pipeline is connected onto the ball valve 13, the ball valve 13 is opened, fracturing fluid enters from the side surface of the four-way 1 and enters the central casing 2 through the long hole 6, so as to enter a shaft, the pressure of the fracturing fluid presses the piston 11 to move downwards until the pressure of the fracturing fluid is the same as the pressure in the original shaft, so that the internal and external pressures of each sealing section of the protector separating the shaft are almost the same, the leakage, thereby playing the guard action to the well head, improving the life of each sealing washer simultaneously.
Claims (3)
1. The utility model provides a sand fracturing well head protector, includes cross (1), its characterized in that: the lower flange of a cross joint (1) is hermetically connected with a Christmas tree main valve (7), the upper flange of the cross joint (1) is connected with a flange screw nut (3), the flange screw nut (3) is in T-shaped threaded connection with a lead screw (5), the upper part of the lead screw (5) is processed into a square head (4) shape, a central sleeve (2) at the lower part of the lead screw (5) is hermetically connected with inner holes of upper and lower vertical pipe sections of the cross joint (1) through two sealing sections (15), a plurality of long holes (6) are formed in the pipe wall between the two sealing sections (15) of the central sleeve (2), the lower part of the central sleeve (2) is hermetically connected with a sealing short section (8) through a circular ring, the lower part of the sealing short section (8) is hermetically connected with an oil pipe hanger (9) through a thread, and the oil;
the horizontal pipes on the two sides of the four-way joint (1) are respectively connected with a ball valve (13) in a sealing way through flanges, and the horizontal pipe section of the four-way joint (1) is provided with a pressure gauge (14).
2. The sand fracturing wellhead protector of claim 1, wherein: a communicating pipe (10) is arranged on one horizontal pipe section of the four-way joint (1) and communicated with an inner cavity of a Christmas tree main valve (7), a piston (11) and a gate valve (12) are arranged in the communicating pipe (10), and the piston (11) is in clearance fit connection with an inner hole of the communicating pipe (10) through a sealing ring.
3. The sand fracturing wellhead protector of claim 1, wherein: the diameter of the communicating pipe section where the piston (11) is located is larger than that of the communicating pipe (10), and the pipe section is hermetically connected with the communicating pipe (10) through a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020149750.6U CN211737113U (en) | 2020-01-31 | 2020-01-31 | Sand fracturing wellhead protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020149750.6U CN211737113U (en) | 2020-01-31 | 2020-01-31 | Sand fracturing wellhead protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211737113U true CN211737113U (en) | 2020-10-23 |
Family
ID=72879050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020149750.6U Expired - Fee Related CN211737113U (en) | 2020-01-31 | 2020-01-31 | Sand fracturing wellhead protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211737113U (en) |
-
2020
- 2020-01-31 CN CN202020149750.6U patent/CN211737113U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |