CN105909181B - A kind of heat injection exploitation oil gas well cementation corrugated bushing device - Google Patents
A kind of heat injection exploitation oil gas well cementation corrugated bushing device Download PDFInfo
- Publication number
- CN105909181B CN105909181B CN201610327068.XA CN201610327068A CN105909181B CN 105909181 B CN105909181 B CN 105909181B CN 201610327068 A CN201610327068 A CN 201610327068A CN 105909181 B CN105909181 B CN 105909181B
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- China
- Prior art keywords
- corrugated
- oil gas
- box cupling
- corrugated bushing
- heat injection
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
Abstract
A kind of heat injection exploitation oil gas well cementation corrugated bushing device, belongs to heat injection exploitation oil gas technical field, solves oil shale in-situ exploitation via steam injection oil gas and uses tradition well cementation straight connector, easily damages the technical problem of straight connector and cement sheath.The present invention includes some corrugated bushings, some corrugated bushings are connected with box cupling, corrugated bushing is the thin metallic tubd that one section of inside and outside wall has fold ripple, and Qi Ding, bottom both ends have external screw joint, the both ends endoporus of box cupling is machined with internal thread, torque shoulder, the both ends internal thread connection on the top of adjacent two corrugated bushings, the external screw joint at bottom both ends and box cupling are provided with the middle part of the endoporus of box cupling, and sealing ring is set between position and wavy metal sleeve pipe above and below torque shoulder.The present invention is used for oil shale in-situ exploitation via steam injection oil gas, and well cementation corrugated bushing can compensate deformation, release thermal stress at any time, have the advantages of sleeve pipe and long cement sheath service life.
Description
Technical field
The invention belongs to oil shale in-situ exploitation via steam injection oil gas technical field, and in particular to a kind of heat injection exploitation oil gas is consolidated
Well corrugated bushing device, especially suitable for oil shale in-situ exploitation via steam injection oil gas, it is also applied for the unconventional oil such as viscous crude, oil-sand
The heat injection of gas resource is exploited.
Background technology
, it is necessary to inject substantial amounts of high-temperature steam in thick oil steam drive and cyclic steam stimulation operation process, glue viscous crude
Degree reduces, and is easy to exploit.The well cementing casing pipe of traditional heat injection exploitation oil gas is all smooth straight connector, and straight connector has higher firm
Degree, its stress deformation inaccurate coordination.Therefore, to be driven in steam with during steam soak, steam injection temperature is up to 250~350 DEG C,
Bushing temperature can also rise to 100~200 DEG C, and straight connector can be caused compression stress over-limit condition by thermal stretching；When stopping is noted
After vapour, in sleeve pipe cooling procedure, straight connector shrinks, and causes tension over-limit condition, so repeated multiple times, easily causes straight
Sleeve pipe deforms damage, the reentrant bushing life-span.Further, since the expansion repeatedly and contraction of well cementation straight connector, are highly vulnerable to breakage set
The cement sheath that pipe surrounding has consolidated, cause occur string vapour, the oily accident of string in oil producing operation.In the prior art, solution
Mainly increase additive in cement, improve strength of cement to improve casing cementing quality, meanwhile, using prestressed casing,
The technical measures such as prestressing force completion, casing stress compensator are damaged to prevent sleeve pipe.These measures energy during practice
Certain effect is played, but work progress is complicated, is raised with heat injection temperature, still can not be fully solved above mentioned problem.It is main former
Because being：In steam injection, inside pipe casing, which produces, to be raised with temperature and reduces continually changing thermal stress, causes sleeve pipe damage, water
Mud ring breakage.
The pyrolysis temperature section of organic matter is 300~500 DEG C in oil shale, it then becomes necessary to which oil shale is heated to 500
More than DEG C, just the petroleum resources in oil shale can be made to obtain high-efficiency mining.And then understand, authorize patent of invention " Convective Heating
Method (the patent No. of oil shale for exploiting oil gas：) and a kind of oil shale petroleum resources in-situ retorting method ZL200510012473.4
(ZL201310057719.4) require the superheated vapour of 600 DEG C of caused temperature in boiler injecting oily page along heat injection well in "
In rock ore bed, ore body is heated, the organic matter in oil shale is formed oil gas after being thermally decomposed, and pass through Low Temperature Steam or condensed water
Carry oil gas and be pumped to ground from producing well.To well imagine, injection vapor (steam) temperature is up to 600 DEG C, under such hot conditions, tradition
Cement the well straight connector and cement sheath will more destructible, so, well cementation straight connector is not particularly suited for oil shale in-situ exploitation via steam injection oil
Gas.
The content of the invention
A kind of the shortcomings that it is an object of the invention to overcome prior art, there is provided heat injection exploitation oil gas well cementation corrugated bushing dress
Put, solve oil shale in-situ exploitation via steam injection oil gas using tradition well cementation straight connector, straight connector be present and cement sheath easily damages
Technical problem.
The present invention is achieved by the following technical solutions：
A kind of heat injection exploitation oil gas well cementation corrugated bushing device, it is characterised in that：The heat injection exploitation oil gas well cementation ripple
Casing bit, including some corrugated bushings, some corrugated bushings are connected with box cupling, and the corrugated bushing is one section of inside and outside wall
Thin metallic tubd with fold ripple, and Qi Ding, bottom both ends have external screw joint, the both ends endoporus of the box cupling is machined with
The internal thread coordinated with the external screw joint, the endoporus middle part of the box cupling are provided with torque shoulder, adjacent two ripples
The top of sleeve pipe, the external screw joint at bottom both ends are connected with internal thread described in the both ends of the box cupling, and in the moment of torsion platform
Shoulder up and down sealing ring is set between position and the corrugated bushing, most next corrugated bushing bottom be provided for connection every
The taper thread interface of deep fat pipe, sealing ring is set between the taper thread interface and the insulated tubing, most next ripple
Line casing shoe welds floral tube, and the floral tube length is equal with target heat injection oil shale seam thickness.
Further, the material of the sealing ring is high temperature resistant, the graphite packing or asbestos of high pressure.
The present invention has following significant progress and effect：
1st, corrugated bushing is compared with straight connector, and corrugated bushing has that rigidity value is low, flexible big characteristic, in temperature rise and
During reduction, the structure Light deformation between a large amount of ripples can be relied on to substitute the vertical large deformation of straight connector.
2nd, corrugated bushing can be such that thermal stress in sleeve pipe is significantly released compared with straight connector using structure Light deformation between ripple
Reduction is put, so as to avoid the damage of sleeve pipe and box cupling；And active force of the sleeve pipe to cement sheath can be substantially reduced, ensure cement sheath not
It is easily destroyed.
3rd, corrugated bushing is compared with straight connector, due to being " S types " interface between corrugated bushing and cement sheath, therefore can be big
Width increases the frictional resistance between cement sheath and corrugated bushing, and tightly corrugated bushing is constrained in below earth's surface.
4th, for corrugated bushing compared with straight connector, " S types " interface between cement sheath and corrugated bushing lengthens sealed pathway,
Corrugated bushing is far superior to the smooth interface of straight connector in terms of anti-hydrocarbon seepage.
5th, for corrugated bushing compared with straight connector, the circulation during wave structure is more suitable for temperature rise and reduced should
Power adds unloading, has very strong anti-fatigue performance, service life length.
The present invention is used for oil shale in-situ exploitation via steam injection oil gas, and well cementation corrugated bushing can compensate deformation, release at any time
Thermal stress, there is the advantages of sleeve pipe and long cement sheath service life.
Brief description of the drawings
Fig. 1 is the structural representation (front view) of corrugated bushing；
Fig. 2 is Fig. 1 top view；
Fig. 3 is the structural representation that the present invention is used for oil shale in-situ exploitation via steam injection oil gas.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is only a present invention part, and based on the embodiment in the present invention, those of ordinary skill in the art are not making creativeness
The other embodiment obtained under the premise of work, belongs to the scope of the present invention.
As shown in Figure 1, 2, 3, a kind of heat injection exploitation oil gas well cementation corrugated bushing device, including some corrugated bushings 1, it is some
The corrugated bushing 1 is connected with box cupling 2, and the corrugated bushing 1 is the thin metallic tubd that one section of inside and outside wall has fold ripple, and
Qi Ding, bottom both ends have external screw joint 11, and the both ends endoporus of the box cupling 2 is machined with the interior spiral shell coordinated with external screw joint 11
Line 21, the endoporus middle part of the box cupling 2 are provided with torque shoulder 22, the outer spiral shell of the top and bottom ends of adjacent two corrugated bushings 1
Line interface 11 is connected with the internal thread 21 at the both ends of box cupling 2, and in the torque shoulder position and radiation fins about 22
Sealing ring 3 is set between pipe 1, and most next bottom of the corrugated bushing 1 is provided for connecting the taper thread interface of insulated tubing 4
12, sealing ring 3 is set between the taper thread interface 12 and the insulated tubing 4, the most next bottom of the corrugated bushing 1 weldering
Floral tube 5 is connect, the length of floral tube 5 is equal with target heat injection oil shale 6 thickness of ore bed.
The material of sealing ring 3 is high temperature resistant, the graphite packing or asbestos of high pressure.
The technical parameter of the corrugated bushing 1 is：Wall thickness is between 4~30mm；Internal diameter is between 80~800mm；The depth of convolution between
10~150mm, respective wavelength are 2~20 times of the depth of convolution.
The present invention is used for the specific steps of oil shale in-situ exploitation via steam injection oil gas：
Step A：Well prepares.In the heat injection region of targeted oil shale ore bed 6 by the downward drilling well of earth's surface, successively two steps are bored
Enter.First, stop after being drilled into the coboundary of oil shale ore bed 6 using large scale drilling tool, high flow rate washover after trip-out, remove shaft bottom and sink
Sand.Then, use instead and be drilled into oily page downwards along the continuation of borehole bottom center with the outside dimension identical small size drilling tool of floral tube 5
Stop after the lower boundary of rock ore bed 6, well-flushing after trip-out, form the lower thin and upper thick open hole well in drilling well aperture.Heat injection well and producing well
Wellbore structure is identical.
Step B：Corrugated bushing decentralization order.Floral tube 5 and the corrugated bushing connected paragraph by paragraph 1 are transferred into note between two parties successively
In the bore hole drilling well of hot well and producing well, floral tube 5 is finally set to be embedded in open hole well bottom thin diameter section, itself and the surrounding of oil shale ore bed 6
Contact is formed, and completes to fix in ground well head.
Step C：Well cementing of cement.Cement is injected in the toroidal cavity of corrugated bushing 1 and ground interlayer, is formed after theing cement solidifies
Unilateral corrugated cement sheath 7.
Step D：Insulated tubing is installed.Be put into insulated tubing 4 between two parties in corrugated bushing 1, taper thread interface 12 with it is heat-insulated
The rotation docking of oil pipe 4, and sealing ring 3 is compressed, form steam injection path.
Step E：Hydraulic pressure burst communicatin.Implement hydraulic fracturing in heat injection well, make heat injection well and producing well in oil shale mine
Connected in layer 6.
Step F：Steam injection recovery gas.In heat injection well, caused a large amount of 600 DEG C of superheated vapours in ground boiler are led to
Cross insulated tubing 4 to be injected into floral tube 5, water vapour is pressed into oil shale ore bed 6 by perforate 51 on floral tube 5, Convective Heating oil
Shale exploits oil gas, and for condensed oil-gas by producing well output, producing well, which can also take turns, is changed to the progress steam injection of heat injection well.
The present invention can be embodied without departing from the spiritual or substantive of invention in a variety of forms, it should therefore be appreciated that on
State embodiment and be not limited to foregoing details, and should widely be explained in claim limited range, therefore fall into right
It is required that or the change in its equivalent scope and remodeling all should be claim and covered.
Claims (2)
- A kind of 1. heat injection exploitation oil gas well cementation corrugated bushing device, it is characterised in that：The heat injection exploitation oil gas well cementation radiation fins Pipe device, including some corrugated bushings (1), some corrugated bushings (1) are connected with box cupling (2), and the corrugated bushing (1) is One section of inside and outside wall has the thin metallic tubd of fold ripple, and Qi Ding, bottom both ends have external screw joint (11), the box cupling (2) both ends endoporus is machined with the internal thread (21) coordinated with the external screw joint (11), the endoporus middle part of the box cupling (2) Provided with torque shoulder (22), the top of adjacent two corrugated bushings (1), the external screw joint (11) at bottom both ends with it is described Internal thread (21) described in the both ends of box cupling (2) connects, and in the torque shoulder (22) position and the wavy metal set up and down Sealing ring (3) is set between pipe (1), and the most next corrugated bushing (1) bottom is provided for connecting the cone of insulated tubing (4) Hickey (12), sealing ring (3), most next institute are set between the taper thread interface (12) and the insulated tubing (4) Corrugated bushing (1) bottom welding floral tube (5) is stated, floral tube (5) length is equal with target heat injection oil shale ore bed (6) thickness.
- A kind of 2. heat injection exploitation oil gas well cementation corrugated bushing device according to claim 1, it is characterised in that：The sealing The material for enclosing (3) is high temperature resistant, the graphite packing or asbestos of high pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610327068.XA CN105909181B (en) | 2016-05-17 | 2016-05-17 | A kind of heat injection exploitation oil gas well cementation corrugated bushing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610327068.XA CN105909181B (en) | 2016-05-17 | 2016-05-17 | A kind of heat injection exploitation oil gas well cementation corrugated bushing device |
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| Publication Number | Publication Date |
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| CN105909181A CN105909181A (en) | 2016-08-31 |
| CN105909181B true CN105909181B (en) | 2018-04-06 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761452B (en) * | 2017-02-12 | 2018-07-20 | 吉林大学 | A kind of oil shale underground in situ exploitation heat-insulation and heat-preservation heat injection pipe |
| CN107091057A (en) * | 2017-06-30 | 2017-08-25 | 四川达灿石油设备有限公司 | Sliceable oil exploitation stabilizing catheter |
| CN109899000B (en) * | 2017-12-08 | 2020-09-04 | 中国石油化工股份有限公司 | Casing pipe nipple |
| CN112483008B (en) * | 2020-11-25 | 2023-01-31 | 中国石油大学(华东) | Special-shaped casing and application thereof in preventing gas well annulus pressure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202215164U (en) * | 2011-07-01 | 2012-05-09 | 沧州市圣达利机械制造有限公司 | Novel petroleum surface casing |
| CN202689955U (en) * | 2012-05-23 | 2013-01-23 | 成都酷玩网络科技有限公司 | Anti-channeling wear-resistant casing for oil well |
| CN203334968U (en) * | 2013-05-15 | 2013-12-11 | 冯乃群 | Oil well casing pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2479711C1 (en) * | 2011-11-28 | 2013-04-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Reinforcement method of productive formations at thermal methods of oil extraction, and extendable filter for its implementation |
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- 2016-05-17 CN CN201610327068.XA patent/CN105909181B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202215164U (en) * | 2011-07-01 | 2012-05-09 | 沧州市圣达利机械制造有限公司 | Novel petroleum surface casing |
| CN202689955U (en) * | 2012-05-23 | 2013-01-23 | 成都酷玩网络科技有限公司 | Anti-channeling wear-resistant casing for oil well |
| CN203334968U (en) * | 2013-05-15 | 2013-12-11 | 冯乃群 | Oil well casing pipe |
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| CN105909181A (en) | 2016-08-31 |
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