CN201865652U - Oil-gas deep well fracturing string - Google Patents
Oil-gas deep well fracturing string Download PDFInfo
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- CN201865652U CN201865652U CN2010206247185U CN201020624718U CN201865652U CN 201865652 U CN201865652 U CN 201865652U CN 2010206247185 U CN2010206247185 U CN 2010206247185U CN 201020624718 U CN201020624718 U CN 201020624718U CN 201865652 U CN201865652 U CN 201865652U
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- sliding sleeve
- oil
- tubing string
- packer
- deep well
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Abstract
An oil-gas deep well fracturing string comprises a shaft casing and an oil/gas extraction tube disposed in the shaft casing, a through hole corresponding to an oil-gas modification horizon is radially arranged on the wall of the shaft casing, a fracturing device is connected to the lower end of the oil/gas extraction tube in the shaft casing, a setting steel ball seat is arranged at the lower end of the fracturing device, and the fracturing device comprises a telescopic compensation tube, a circulation slide bushing, a receiving ball seat, a hydraulic anchor and a packer, wherein the telescopic compensation tube, the circulation slide bushing, the receiving ball seat, the hydraulic anchor and the packer are disposed in vertical sequence and fixedly connected into a whole through connectors, and the telescopic compensation tube moves relative to the exterior of the string to operate under tension action of the string, so that underground telescopic deformation and displacement of the string are compensated automatically, stress fracture of the string is eliminated, and displacement of the packer is prevented. The circumference of the packer is matched with the inner wall of the shaft casing in a sealed manner to divide an inner space of the shaft casing into an upper space and a lower space which are relatively independent to each other. The tip of the hydraulic anchor is abutted to the inner wall of the shaft casing to anchor the fracturing device onto the shaft casing. The oil-gas deep well fracturing string is safe and reliable and long in service life.
Description
Technical field
The utility model relates to a kind of oil, natural gas extraction equipment, specifically is a kind of oil gas deep well fracturing tubing string, and it is primarily aimed at high temperature, high pressure, deep-seated oil gas reservoir.
Background technology
In recent years, domestic oil gas field has been carried out a series of fracturing reform technologies, and the fracturing string of formation has a lot.But these fracturing strings only are adapted to the middle-shallow layer gas reservoir, the fracturing string of using for high temperature, high pressure, deep-seated oil gas reservoir, because characteristics such as the down-hole pressure of high temperature, high pressure, deep-seated oil gas reservoir well is big, temperature height, the fracturing reform operating tool string is very risky, and required fracturing string is very few.Because the characteristics of high temperature, high pressure, deep-seated oil gas reservoir well, down-hole string produces the phenomenon of tubing string dilatation and displacement easily because of temperature effect and pressure effect etc., put forward difficulty after the pressure break on the tubing string, tubing string is easy to fracture under the effect of stress, the packer pressure-bearing is limited, packer also is easy to generate displacement, the poor reliability of down-hole string work, and the working time is short.
Chinese patent literature discloses name and has been called " once tubular column process for combination oil production by multiple fracturing for oil gas well " (publication number: CN101418681, open day: 2009.04.29), " deep gas well separate stratum fracfturing tool string " (publication number: CN201031679, open day: 2008.03.05) with " oil; natural gas well multiple fracturing tubing string " (publication number: CN201144682, open day: 2008.11.05), wherein, " once tubular column process for combination oil production by multiple fracturing for oil gas well " is to determine corresponding fracturing string structure according to different reservoirs and different fracturing parameters, the sleective fracturing transformation of disposable realization reservoir and close the mode of adopting, and each lamination splits order and has controllability completely, operating risk is little, can shorten the pressing crack construction activity duration greatly, reach the purpose that improves oil gas well production and exploitation effect; " deep gas well separate stratum fracfturing tool string " mainly solves the problem that existing fracturing tool string can not satisfy the deep gas well separate stratum fracfturing, this instrument mainly is used in the deep gas well separate stratum fracfturing of oil field, have and reach the separate stratum fracfturing that fixed tubular column carries out two intervals, the advantage of raising deep gas well pressing crack construction efficient; " oil; natural gas well multiple fracturing tubing string " has a plurality of fracturing devices, the quantity of quantity and gas-bearing formation is suitable, between every adjacent two gas (oil) layer, fracturing device of corresponding layout, fracturing device is connected on the lower end of air collecting pipe, seat envelope steel ball seat is located at the lower end of the last fracturing device, fracturing device is by last, the sandblast sliding sleeve that is disposed in order down, hydraulic anchor, packer, the seat of receiving constitutes, the affixed one-tenth of each parts is whole, the side face of packer cooperates with the inner wall sealing of gas well jacket casing pipe, the inner space of gas well jacket casing pipe is isolated, the inwall of gas well jacket casing pipe is lived on the anchor pinnacle of hydraulic anchor, and fracturing device is anchored on the gas well jacket casing pipe, and this fracturing string is owing to have a plurality of fracturing devices, only lower prop of need can carry out the fracturing reform more than three layers and three layers, and realizes commingling production.Though above-mentioned technology has plurality of advantages, but they all can't be used for down-hole string because of the tubing string dilatation of generations such as temperature effect and pressure effect and effective compensation of displacement, eliminate the stress fracture of tubing string, prevent the packer displacement, reach the purpose that improves the down-hole string functional reliability and lengthen working hours.
Flourish along with the oil/gas industrial technology, extremely urgent to the fracturing string research and development of oil/gas high temperature, high pressure, deep-seated oil gas reservoir well.
Summary of the invention
The purpose of this utility model is at above-mentioned the deficiencies in the prior art, a kind of special fracturing string at oil/gas high temperature, high pressure, deep-seated oil gas reservoir well is provided, it adopts the Y341 packer is main, with pressing crack construction, to adopt (oil) gas integrated, so that down-hole string is effectively compensated because of the tubing string dilatation and the displacement of generations such as temperature effect and pressure effect, eliminate the stress fracture of tubing string, prevent the packer displacement, reach the purpose that improves the down-hole string functional reliability and lengthen working hours.
The purpose of this utility model is achieved in that
A kind of oil gas deep well fracturing tubing string, comprise wellbore casing and be arranged in the interior oil recovery/tracheae of wellbore casing, radially be provided with through hole on the tube wall of described wellbore casing, this through hole is corresponding with oil gas transformation layer position, and the oil recovery/tracheae lower end in the described wellbore casing is connected with fracturing device; Be provided with seat envelope steel ball seat in the lower end of fracturing device, described fracturing device is made of the upper and lower flexible compensation pipe that is disposed in order, circulation sliding sleeve, receive seat, hydraulic anchor and packer, and each parts is whole by the affixed one-tenth of connector; The inner and outer pipes generation relative motion and working under the effect of tubing string tension force of described flexible compensation pipe compensates tubing string automatically in down-hole dilatation and displacement, eliminates the stress fracture of tubing string, prevents the packer displacement; The side face of described packer cooperates with the inner wall sealing of wellbore casing, and the inner space of wellbore casing is isolated into upper and lower two relatively independent spaces; The inwall of wellbore casing is lived on the anchor pinnacle of described hydraulic anchor, and fracturing device is anchored on the wellbore casing.
Described circulation sliding sleeve is made up of sliding sleeve urceolus and sliding sleeve core pipe, radially be provided with sand jet outlet on the sliding sleeve urceolus, the corresponding sliding sleeve core of this sand jet outlet pipe, by the shutoff of sliding sleeve core pipe, sliding sleeve urceolus and sliding sleeve core tubular axis are to being slidingly matched, and fitting face is provided with shear pin, and shear pin is fixed sliding sleeve urceolus and sliding sleeve core pipe, sliding sleeve core pipe suitable for reading has and is used to accept the face that is sealed and matched that starts ball, and the sealing fitting face is with to start ball suitable.
Described sand jet outlet is a plurality of, circumferentially evenly arranges along the sliding sleeve urceolus.
Described sand jet outlet is rectangular-shaped.
Described startup ball is a low-density material ball.
Described low-density material ball is nylon ball or hollow steel ball.
The back side of described seat envelope steel ball seat is located on the interior guide shoe of wellbore casing.
Described affixed be that mode with screw buckle is connected into integral body.
Described packer is the Y341 packer.
Useful technique effect of the present utility model: adopt this tubing string of said structure to have the flexible compensation pipe, tubing string dilatation and displacement because of generations such as temperature effect and pressure effects will effectively be compensated tubing string in the down-hole, eliminate the stress fracture of tubing string, prevent the packer displacement, reach the purpose that improves the down-hole string functional reliability and lengthen working hours; The Y341 packer that adopts has higher pressure-bearing rank, can bear higher well head operation pressure, and effectively protect packer top wellbore casing; When the circulation sliding sleeve is not worked, with space in packer top oil recovery/tracheae and the wellbore casing separately, during work, set up the passage of annular space on oil recovery/tracheae and the packer, when being convenient to abnormal conditions, can pass through the annular space well-flushing, replace out oil recovery/endotracheal fracturing material; Start ball and adopt the low-density ball, this ball can be taken out of in the well together along with fracturing outlet liquid after fracturing reform was finished, realized oil recovery/endotracheal all-pass, overcome because of starting ball and be trapped in work disadvantages such as influencing output and later stage production logging in oil recovery/tracheae.Its construction success rate is very high.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model parts-circulation sliding sleeve.
Code name implication among the figure: 1-wellbore casing; 2-oil recovery/tracheae; 3-flexible compensation pipe; 4-circulation sliding sleeve; 5-the seat of receiving; 6-hydraulic anchor; 7-packer; 8-seat envelope steel ball; 9-seat envelope steel ball seat; 10-guide shoe; 11-transformation layer position; 12-artificial bottom of a well; 13-startup ball; 14-sliding sleeve urceolus; 15-shear pin; 16-sand jet outlet; 17-sliding sleeve core pipe.
The specific embodiment
Referring to Fig. 1 and Fig. 2: the utility model comprises wellbore casing 1 and is arranged in oil recovery/tracheae 2 in the wellbore casing 1, radially is provided with through hole on the tube wall of wellbore casing 1, and it is corresponding that this through hole and oil gas are transformed layer position 11, and transforming layer 11 below is artificial bottom of a well 12.Oil recovery/tracheae 2 lower ends in the wellbore casing 1 are connected with fracturing device.Be provided with a seat envelope steel ball seat 9 in the lower end of fracturing device, the back side (being non-working surface) of seat envelope steel ball seat 9 is located on the guide shoe 10 in the wellbore casing 1, is fixed in the wellbore casing 1.Fracturing device is made of the upper and lower flexible compensation pipe 3 that is disposed in order, circulation sliding sleeve 4, the seat 5 of receiving, hydraulic anchor 6 and packer 7, and each parts is connected into integral body by connector in the mode of screw buckle.Flexible compensation pipe 3 is used for down-hole string because of the tubing string dilatation of generations such as temperature effect and pressure effect and effective compensation of displacement, in work progress, cut off shear pin by the hydraulic drive piston stroking upward, removing elasticity connects spacing, flexible compensation pipe 3 inner and outer pipes generation relative motion and working under the effect of tubing string tension force, thereby reach automatic compensating action, automatically the compensation tubing string is eliminated the stress fracture of tubing string in down-hole dilatation and displacement, prevents packer 7 displacements.Packer 7 is the Y341 packer, and the side face of packer 7 cooperates with the inner wall sealing of wellbore casing 1, and the inner space of wellbore casing 1 is isolated into upper and lower two relatively independent spaces.The inwall of wellbore casing 1 is lived on the anchor pinnacle of hydraulic anchor 6, and fracturing device is anchored on the wellbore casing 1.Circulation sliding sleeve 4 is made up of sliding sleeve urceolus 14 and sliding sleeve core pipe 17, radially be provided with four rectangular sand jet outlets 16 on the sliding sleeve urceolus 14, they are circumferentially evenly arranged along sliding sleeve urceolus 14, these sand jet outlet 16 corresponding sliding sleeve core pipes 17, by 17 shutoff of sliding sleeve core pipe, sliding sleeve urceolus 14 and 17 axial sliding fits of sliding sleeve core pipe, fitting face is provided with shear pin 15, shear pin 15 is fixing with sliding sleeve core pipe 17 with sliding sleeve urceolus 14, sliding sleeve core pipe 17 suitable for reading has and is used to accept the face that is sealed and matched that starts ball 13, and the sealing fitting face is with to start ball 13 suitable.Starting ball 13 is low-density material ball, generally adopts nylon ball or hollow steel ball, because it is little to start the quality of ball 13, starts the back and just can make oil recovery/tracheae 2 keep the all-pass footpath along with fracturing outlet liquid is taken out of in the well together, obtains maximum gas production flow.
The effect of above-mentioned seat envelope steel ball seat 9 is, when construction, drop into hollow seat envelope steel ball 8 from well head, seat envelope steel ball 8 is fallen on the seat envelope steel ball seat 9, by 2 pressurizations of oil recovery/tracheae, make hydraulic anchor 6 stressed, its anchor point anchors into wellbore casing 1,7 of packers are sealed, and fracturing device promptly is positioned and is fixed in the pit shaft conduit 1.
Above-mentioned oil recovery/tracheae 2 is the general designation of flow string and air collecting pipe, decides according to concrete exploitation object in concrete the application, and for example, exploitation is a flow string during oil field, is air collecting pipe when tapping natural gas.
Be example to tap natural gas now, describe the course of work of the present utility model in detail: 1, at first, following perforating gun is penetrated out the gas-bearing formation section, mud lubrication in well; 2, this fracturing string is lowered in the natural gas well, mud in the well is replaced out in anti-circulation; 3, by throwing φ 38mm steel ball in the air collecting pipe to seat envelope steel ball seat, the tracheae pressurization produces the tracheae inside and outside differential pressure, and packer, hydraulic anchor start envelope, the grappling state of taking a seat of going forward side by side, and packing element carries out packing with each layer and oil sets annular space; 4, air collecting pipe carries out the pressing crack construction of gas-bearing formation; If abnormal conditions occur in 5 work progresss, as sand plug, can throw φ 45mm low-density ball from tracheae, treat that ball pressurizes after the circulation sliding sleeve is received seat, the circulation sliding sleeve is opened in the shear pin fracture, carries out accident treatment by anti-flushing well; 6, drive a well after pressure break is finished and carry out discharge opeing and later stage production.
The utility model mainly is applicable to the natural gas high temperature deep well, also uses applicable to oil well.
Claims (9)
1. oil gas deep well fracturing tubing string, comprise wellbore casing (1) and be arranged in the interior oil recovery/tracheae (2) of wellbore casing (1), radially be provided with through hole on the tube wall of described wellbore casing (1), this through hole is corresponding with oil gas transformation layer position, and it is characterized in that: oil recovery/tracheae (2) lower end in the described wellbore casing (1) is connected with fracturing device; Be provided with seat envelope steel ball seat (9) in the lower end of fracturing device, described fracturing device is made of the upper and lower flexible compensation pipe (3) that is disposed in order, circulation sliding sleeve (4), receive seat (5), hydraulic anchor (6) and packer (7), and each parts is whole by the affixed one-tenth of connector; Described flexible compensation pipe (3) inner and outer pipes generation relative motion and working under the effect of tubing string tension force compensates tubing string automatically in down-hole dilatation and displacement, eliminates the stress fracture of tubing string, prevents packer (7) displacement; The side face of described packer (7) cooperates with the inner wall sealing of wellbore casing (1), and the inner space of wellbore casing (1) is isolated into upper and lower two relatively independent spaces; The inwall that wellbore casing (1) is lived on the anchor pinnacle of described hydraulic anchor (6) is anchored at fracturing device on the wellbore casing (1).
2. oil gas deep well fracturing tubing string according to claim 1, it is characterized in that: described circulation sliding sleeve (4) is made up of sliding sleeve urceolus (14) and sliding sleeve core pipe (17), radially be provided with sand jet outlet (16) on the sliding sleeve urceolus (14), this sand jet outlet (16) corresponding sliding sleeve core pipe (17), by sliding sleeve core pipe (17) shutoff, sliding sleeve urceolus (14) and sliding sleeve core pipe (17) axial sliding fit, fitting face is provided with shear pin (15), shear pin (15) is fixing with sliding sleeve urceolus (14) and sliding sleeve core pipe (17), sliding sleeve core pipe (17) suitable for reading has and is used to accept the face that is sealed and matched that starts ball (13), and the sealing fitting face is with to start ball (13) suitable.
3. oil gas deep well fracturing tubing string according to claim 2 is characterized in that: described sand jet outlet (16) is circumferentially evenly arranged along sliding sleeve urceolus (14) for a plurality of.
4. according to claim 2 or 3 described oil gas deep well fracturing tubing strings, it is characterized in that: described sand jet outlet (16) is for rectangular-shaped.
5. oil gas deep well fracturing tubing string according to claim 2 is characterized in that: described startup ball (13) is a low-density material ball.
6. oil gas deep well fracturing tubing string according to claim 5 is characterized in that: described low-density material ball is nylon ball or hollow steel ball.
7. oil gas deep well fracturing tubing string according to claim 1 is characterized in that: the back side of described seat envelope steel ball seat (9) is located on the interior guide shoe (10) of wellbore casing (1).
8. oil gas deep well fracturing tubing string according to claim 1 is characterized in that: described affixed be that mode with screw buckle is connected into integral body.
9. oil gas deep well fracturing tubing string according to claim 1 is characterized in that: described packer (7) is the Y341 packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206247185U CN201865652U (en) | 2010-11-25 | 2010-11-25 | Oil-gas deep well fracturing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206247185U CN201865652U (en) | 2010-11-25 | 2010-11-25 | Oil-gas deep well fracturing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201865652U true CN201865652U (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206247185U Expired - Lifetime CN201865652U (en) | 2010-11-25 | 2010-11-25 | Oil-gas deep well fracturing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201865652U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277087A (en) * | 2013-06-17 | 2013-09-04 | 西安威盛电子仪器有限公司 | Downhole petroleum formation fracturing string tension detecting instrument |
| CN107304670A (en) * | 2016-04-19 | 2017-10-31 | 中国石油天然气股份有限公司 | Segmentation transformation tubing string |
| CN108952661A (en) * | 2018-08-01 | 2018-12-07 | 季会军 | A kind of novel hierarchical formula is anti-to spit sand pressure break sand blasting unit and blasting method |
-
2010
- 2010-11-25 CN CN2010206247185U patent/CN201865652U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277087A (en) * | 2013-06-17 | 2013-09-04 | 西安威盛电子仪器有限公司 | Downhole petroleum formation fracturing string tension detecting instrument |
| CN103277087B (en) * | 2013-06-17 | 2015-10-14 | 西安威盛电子科技股份有限公司 | Oil well sub-surface fracturing string tool string tension detecting instrument |
| CN107304670A (en) * | 2016-04-19 | 2017-10-31 | 中国石油天然气股份有限公司 | Segmentation transformation tubing string |
| CN108952661A (en) * | 2018-08-01 | 2018-12-07 | 季会军 | A kind of novel hierarchical formula is anti-to spit sand pressure break sand blasting unit and blasting method |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110615 |
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| CX01 | Expiry of patent term |