CN104975818A - Device and technological method for pulling lower oil tube - Google Patents

Device and technological method for pulling lower oil tube Download PDF

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Publication number
CN104975818A
CN104975818A CN201510387235.5A CN201510387235A CN104975818A CN 104975818 A CN104975818 A CN 104975818A CN 201510387235 A CN201510387235 A CN 201510387235A CN 104975818 A CN104975818 A CN 104975818A
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China
Prior art keywords
hanger
oil
reducing
oil tube
path
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CN201510387235.5A
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Chinese (zh)
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CN104975818B (en
Inventor
于雷
高彦生
王玉国
郭玉强
欧阳涛
肖昌
李洪波
王军辉
马骁
孙延辉
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中国石油天然气股份有限公司
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Publication of CN104975818A publication Critical patent/CN104975818A/en
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Abstract

The invention discloses a device and a technological method for pulling a lower oil tube. The device comprises a large cross, a hanger, a hanger plug, a double ram type preventer and a sealing piece. The large cross comprises a first channel, a second channel, a third channel and a fourth channel, wherein the first channel is connected with a well mouth flange in a sealing mode, and the second channel is connected with the double ram type preventer in a sealing mode. A hanger seat is arranged at the position of the second channel, an open flow pipeline is arranged on the third channel and/or the fourth channel, and a first valve is arranged on the open flow pipeline. A liquid flow channel is formed between the hanger and the large cross, the hanger is provided with a first matching part and a second matching part opposite to the first matching part, the first matching part is matched with the hanger seat, and the second matching part is used for fixing the oil tube. The lower end of the hanger plug is fixed to the hanger in a sealing mode. The double ram type preventer is connected with a containing seat in a sealing mode. The sealing piece is arranged in the containing seat. The device and the technological method for pulling the lower oil tube are suitable for non-well killing operation, high in operation efficiency and low in cost.

Description

The instrument and supplies method of lower oil tube
Technical field
The present invention relates to a kind of oil field snubbing serving technical field, particularly a kind of instrument and supplies method of lower oil tube.
Background technology
Along with oil field development is to the middle and later periods, reservoir pressure reduces, and low pressure well increases gradually.Described low pressure well mainly refer to 1 MPa is not more than for wellhead shut-in pressure, gas liquid ratio is not more than 100, fluid temperature (F.T.) not higher than 80 degrees Celsius, hydrogen sulfide content is higher than 15 milligrams/cubic metre, the reservoir pressure coefficient oil-water well that is less than 0.7.
When carrying out lower oil tube operation for described low pressure well, first to carry out kill-job by the mode injecting well killing fluid in well, particularly for the well that leakage is serious, also will take repeatedly kill-job mode.During described kill job, its well killing fluid injected in well not only can polluted reservoir, also can increase stratum water, increase operation after to pump drainage period and increase effluent cycle disposal cost, bring difficulty to recovering production capacity after operation.So need a kind of special snubbing serving technique for these low pressure wells, realize no killing well lower oil tube.
It is airtight operation that existing no killing well removes technique, first adopting annular preventer or tubular preventer to carry out sealing annular space, then having carried out lower tubular column by removing mechanism by force.Described when removing mechanism's operation by force, there is the defect that efficiency is low, cost is high: general, by described remove mechanism's operation by force time, because its equipment is huge, usually have 5 meters high, therefore need to be equipped with special job platform; Described remove by force mechanism due to equipment huge, also slower during installation and transportation, during operation its to remove speed slow, slow from job platform tubing string of unloading, the activities of the non-capping tools in down-hole or Special Tool is slow, therefore the general individual well activity duration, individual well operating cost needed about 170,000 more than 10 days.
Therefore, be necessary to propose a kind of process being applicable to the no killing well lower oil tube of low pressure well, improve operating efficiency, reduce costs.
Summary of the invention
The object of this invention is to provide a kind of instrument and supplies method being applicable to the lower oil tube of snubbing serving, operating efficiency is high, cost is low.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
A kind of equipment of lower oil tube, comprise: big four, hanger, hanger plug, double ram type preventer, seal, described big four comprises the first relative path, alternate path and relative third path, the 4th path, its first path and wellhead flange are tightly connected, and its alternate path and described double ram type preventer are tightly connected; Described alternate path position is provided with hanger seat, for arranging described hanger hermetically, its third path and/or the 4th path being provided with relief line, described relief line is provided with the first valve; Described hanger is the multidiameter of hollow, forms fluid course between itself and described big four, and it has the first relative auxiliary section and the second auxiliary section, and described first auxiliary section coordinates with described hanger seat, and described second auxiliary section is used for fixing oil pipe; Described hanger plug, its lower end is fixed on described hanger hermetically; Described double ram type preventer comprises reducing slips, reducing partly seals flashboard, is connected with containing seat described reducing slips up seal; Described seal is arranged in described containing seat, and it, for being set in oil pipe periphery, realizes the movable sealing of oil pipe.
In a preferred embodiment, it also comprises fluid reservoir, and described relief line one end is communicated with described third path, and the other end is communicated with described fluid reservoir.
In a preferred embodiment, described containing seat is outside equipped with oil-water recovering device, is provided with the draining pipeline that described oil-water recovering device can be communicated with described fluid reservoir between described oil-water recovering device with described fluid reservoir.
In a preferred embodiment, described seal is for having flexible circular glue core, and its minimum diameter is less than the external diameter having treated flowline.
In a preferred embodiment, the equipment overall height of described lower oil tube is not higher than 550 millimeters.
A process for lower oil tube, comprising:
Under enter hanger plug before, in oil pipe, deliver blanking plug, realize pipe in shutoff;
Hanger is installed hanger plug;
On carry described hanger plug, close reducing half envelope flashboard and reducing slips;
After removal hanger, containing seat installs seal;
Open reducing half envelope flashboard and reducing slips, the first valve, carries out open flow;
Play oil pipe.
In a preferred embodiment, in oil pipe, deliver blanking plug, after realizing the interior shutoff of pipe, also comprise and detect well head pressure, temperature, hydrogen sulfide content.
In a preferred embodiment, when described seal changed by needs, close described reducing and partly seal flashboard.
In a preferred embodiment, when occurring gas blowout accident, first closing described reducing half envelope flashboard and reducing slips, then closing described first valve.
In a preferred embodiment, after described installation double ram type preventer, also comprise and pressure testing is carried out to described double ram type preventer.
The features and advantages of the invention are: the equipment of lower oil tube of the present invention, described seal is adopted to seal annular space, allow first valve at big four place to be in opening to carry out annular space open flow when carrying out rountrip simultaneously, double ram type preventer prevents upper top simultaneously, structure is simple, without the need to job platform, and convenient working, the individual well activity duration, cost was 3, about 40,000 operation in 3 days.Remove for mechanism by force relative to existing, substantially increase operating efficiency, reduce operating cost.
Secondly, the equipment availability process of lower oil tube of the present invention seals the operation of annular space lower oil tube by seal, and big four is in opening simultaneously, when there is the emergency episodes such as blowout, then closes variable bore ram and reducing slips, safe and reliable.
In addition, the apparatus adaptability of lower oil tube of the present invention is strong.Because described seal reducing scope is large, can cross box cupling, the described reducing for static seal half seals flashboard and is all variable-diameter structure for anti-top reducing slips simultaneously, can adapt to the needs of down-hole combined string.
Accompanying drawing explanation
Fig. 1 is the structural representation of the equipment of a kind of lower oil tube in the embodiment of the present invention;
Fig. 2 is the view of the equipment of a kind of lower oil tube in the embodiment of the present invention;
A kind of installment state figure when Fig. 3 is the equipment use of lower oil tube in the embodiment of the present invention;
Fig. 4 is the process method flow chart of a kind of lower oil tube in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is elaborated, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen in the application's claims limited range.
The invention provides a kind of instrument and supplies method being applicable to the lower oil tube of snubbing serving, operating efficiency is high, cost is low.
Referring to Fig. 1, is a kind of in embodiment of the present invention structural representation of equipment of lower oil tube.The equipment of described lower oil tube comprises: big four 1, hanger 2, hanger plug 20, double ram type preventer 3, seal 4, relief line 5.
Described big four 1 comprises the first relative path 11, alternate path 12 and relative third path 13, the 4th path 14.Described first path 11 is positioned at along the relative lower position on gravity direction.Described first path 11 is tightly connected with wellhead flange A.The internal diameter of described first path 11 and the internal diameter of described wellhead flange A match.Such as the internal diameter of described first path 11 is equal with the internal diameter of described wellhead flange A.Described alternate path 12 is positioned at along the relative top position on gravity direction.Described alternate path 12 is tightly connected with described double ram type preventer 3.Described alternate path 12 position is provided with hanger seat 15, for arranging described hanger 2 hermetically.Concrete, described hanger seat 15 can be the one section of necking down formed on the inwall of described alternate path 12.Described third path 13 is positioned at along the relative side in horizontal direction.Described third path 13 is provided with relief line 5, described relief line 5 is provided with the first valve 50.Described relief line 5 one end is communicated with described third path 13, the other end with lead to fluid reservoir 6.When liquid flows upwards in oil jacket annular space, by the third path 13 be connected with described oil jacket annular space, described fluid reservoir can be imported.Described 4th path 14 is positioned at along the relative opposite side in horizontal direction.Described 4th path 14 also can arrange relief line, accordingly, also can corresponding first valve be set on described relief line.Described relief line one end can be connected with described 4th path 14, and the other end also can lead to fluid reservoir 6.In addition, described 4th path 14 can arrange kill line, and corresponding second valve is set on described 4th path 14, for controlling the circulation of well killing fluid.
Refer to Fig. 2, the multidiameter of described hanger 2 in hollow, it has the first relative auxiliary section 21 and the second auxiliary section 22.The external diameter of described first auxiliary section 21 is greater than the external diameter of described second auxiliary section 22, namely described hanger 2 from top to bottom external diameter successively decrease gradually.Described first auxiliary section 21 coordinates with described hanger seat 15, concrete, and the external diameter of described first auxiliary section 21 is greater than the internal diameter at described hanger seat 15 place.The position that described hanger 2 coordinates with described hanger seat 15 also can be provided with annular seal, for ensureing the sealing of hanger 2 and described hanger seat 15 cooperation place.The inner side of the upper end of described hanger 2 is provided with screw thread, for arranging hanger plug 20.Described second auxiliary section 22 is for fixing oil pipe C.Concrete, described second auxiliary section 22 specifically can be the threaded pipeline section of tool, and it is for being connected with the screw thread of oil pipe upper end.Described second auxiliary section 22 is located in described big four 1, and its external diameter is less than the internal diameter at described big four 1 first path 11 place.Fluid course B is formed between second auxiliary section 22 of described hanger 2 and described big four 1.When liquid flows upwards in oil jacket annular space, can described fluid course B be passed through, flow to described third path 13, thus by relief line 5, import described fluid reservoir 6.
Described hanger plug 20, its lower end is fixed on described hanger 2 hermetically.Described hanger plug 20 is the tubing string of hollow, and its lower end is provided with screw thread, for being fixedly connected with described hanger 2.The tube wall of described hanger plug 20 is provided with by-pass prot, is provided with the ball valve mechanism that can open or close described by-pass prot in the relevant position of described by-pass prot.When described double ram type preventer 3 needs pressure testing, can think that injecting liquid in described hanger plug 20 suppresses, open described by-pass prot suppressing ball valve mechanism described in process, make the liquid injected can flow in described double ram type preventer 3, continue to suppress injection liquid, until reach double ram type preventer rated pressure, namely achieve the work pressure test to double ram type preventer 3.
Described double ram type preventer 3 comprises reducing slips 31, reducing half envelope flashboard 32, and described reducing slips 31 is connected with containing seat 33 hermetically.Described reducing slips 31 is positioned at above described reducing half envelope flashboard 32.Because down-hole string has different specifications usually, therefore, correspondingly described reducing half envelope flashboard B and described reducing slips C comprises plurality of specifications.Such as when down-hole string is the oil pipe of external diameter Φ 73 millimeters and the tubing coupling of external diameter Φ 89 millimeters is combined, then correspondingly, the reducing scope that described reducing slips 31, reducing half seals flashboard 32 can be Φ 73 millimeters to Φ 89 millimeters.When down-hole string is the oil pipe of external diameter Φ 89 millimeters and the tubing coupling of external diameter Φ 114 millimeters is combined, then correspondingly, the reducing scope that described reducing slips 31, reducing half seals flashboard 32 can be Φ 89 millimeters to Φ 114 millimeters.During use, the internal diameter of described reducing half envelope flashboard 32 is consistent with the external diameter of corresponding tubing string, can embrace corresponding tubing string, realizes static seal.In addition, the described reducing for static seal half envelope flashboard 32 and the reducing slips 31 for anti-upper top are all variable-diameter structure, can adapt to the needs of down-hole combined string.
Described seal 4 is arranged in described containing seat 33, and it is peripheral for being set in oil pipe C, realizes the movable sealing of oil pipe C.Described seal 4 is for having flexible circular glue core, its minimum diameter is less than the external diameter having treated flowline C, when described seal 4 is set in oil pipe C periphery, it is under the effect of elastic-restoring force, closely be attached on oil pipe C outer wall, when oil pipe C by carry in process, described seal 4 can all the time with described oil pipe C close contact.The equipment of lower oil tube of the present invention is by described seal 4 sealing wellhead annular space, and to carry out lower oil tube operation, without the need to removing mechanism by force in operation process, remove compared with mechanism's operation by force with existing, operating efficiency is high, cost is low.In addition, because described seal 4 reducing scope is large, can cross box cupling, movable sealing can be carried out to oil pipe and tubing coupling simultaneously, the needs of down-hole combined string can be adapted to.
The equipment of described lower oil tube also comprises fluid reservoir 6, and described relief line 5 one end is communicated with described third path 13, and the other end is communicated with described fluid reservoir 6.Described liquid storage fills with 6 for collecting the liquid by fluid course B, third path 13, relief line 5 inflow in described well.
Described containing seat 33 is outside equipped with oil-water recovering device 7, and described oil-water recovering device 7, for when unloading tubing string, reclaiming the liquid in oil pipe, preventing well head from polluting.The draining pipeline 70 that described oil-water recovering device 7 can be communicated with described fluid reservoir 6 is provided with between described oil-water recovering device 7 with described fluid reservoir 6.When unloading tubing string, use oil-water recovering device 7 to carry out liquid in recovery tube, prevent well head from polluting.Described oil-water recovering device 7 is arranged on described double ram type preventer 3 upper surface, the liquid after recyclable shackle in oil pipe C.The liquid that described oil-water recovering device 7 reclaims flows into fluid reservoir 6 by draining pipeline 70.
The equipment overall height of described lower oil tube is not higher than 550 millimeters.Because the device height of lower oil tube of the present invention is lower, therefore without the need to job platform, convenient working.
The equipment of lower oil tube of the present invention in use, is first delivered blanking plug and is completed shutoff in pipe, then detect the pressure of well head accordingly, to judge described pressure whether in predetermined pressure limit to oil pipe C precalculated position; Detect the temperature of well head, to judge described temperature whether in predetermined temperature range; Detect the hydrogen sulfide content of well head, to judge described hydrogen sulfide content whether in predetermined scope.If described pressure in predetermined pressure limit, described temperature in predetermined temperature range and described hydrogen sulfide content in predetermined scope, then then hanger plug 20 is connected on hanger 2.
Refer to Fig. 3, a kind of installment state figure during equipment use for lower oil tube in the embodiment of the present invention.Before carrying out lower oil tube, may need to carry out rod job.When carrying out rod job, need, at well head, big four 1 and controlled actuating oil-pumping unit device D are installed.For this reason, in the present invention, when carrying out lower oil tube operation, by installing the reliable shutoff that described hanger plug 20 can realize hanger 2 place on described hanger 2, remove controlled actuating oil-pumping unit device D and safety installation double ram type preventer 3 to guarantee safety.Complete in pipe after shutoff when delivering blanking plug to oil pipe C precalculated position, can carry out removing the sequence of operations such as controlled actuating oil-pumping unit equipment.
Suit double ram type preventer 3.After cover installs described double ram type preventer 3, pressure testing is carried out to described double ram type preventer 3.Described process of double ram type preventer 3 being carried out to pressure testing completes by described hanger plug 20.Concrete, hanger plug 20 of the present invention is buckled in described hanger 2 by the screwed connection of lower end, and complete and connect and sealing, described hanger plug 20 has the function of shutoff, pressure testing, lifting short circuit simultaneously.During concrete pressure testing, first close described reducing half envelope flashboard 32, make it be embraced by described hanger plug 20, realize sealing; Then squeeze into pressure testing liquid from described hanger plug 20 upper end, described pressure testing liquid enters in described double ram type preventer 3 by the by-pass prot of described hanger plug 20; When pressure reaches rated pressure, complete pressure testing.Relative to existing pressure testing mode, during pressure testing, need hanger plug 20 to remove, again enter pressure-test short joint down and carry out pressure testing, not only saved operation, also eliminated pressure-test short joint.
After the pressure testing of described double ram type preventer 3 is qualified, on carry described hanger plug 20, concrete, the described hanger 2 be connected is proposed more than described double ram type preventer 3 upper surface, then reducing half envelope flashboard 32 and reducing slips 31 is closed, after laying down described hanger 2, seal 4 is installed, to realize for installing or the safe blowout prevention of operation process.When needs disassembling, assembling and replacing seal 4, dismounting hanger 2 or when running into the emergency episodes such as blowout, require to close reducing half envelope flashboard 32, reducing slips 31, just can security seal annular space after closing, prevent from tubing string pushes up simultaneously.
Next carry out lower oil tube operation, now, open described reducing half envelope flashboard 32, reducing slips 31 and described first valve 50.
Because the matching relationship between described seal 4 and tubing string is movable sealing, tubing string can rub with described seal 4 upper carrying in process, thus can produce wearing and tearing to described seal 4.When seal 4 changed by needs, undertaken by closing described reducing half envelope flashboard 32.
When there is the emergency episodes such as blowout, first to close described reducing half envelope flashboard 32 and described reducing slips 31 immediately, then closing first valve 50 at described big four 1 place.
In sum, the equipment of lower oil tube of the present invention, described seal 4 is adopted to seal annular space, allow first valve 50 at big four 1 place to be in opening to carry out annular space open flow when carrying out rountrip, double ram type preventer 3 prevents upper top simultaneously, and structure is simple simultaneously, without the need to job platform, convenient working, the individual well activity duration, cost was 3, about 40,000 operation in 3 days.Remove for mechanism by force relative to existing, substantially increase operating efficiency, reduce operating cost.
Secondly, the equipment availability process of lower oil tube of the present invention seals the operation of annular space lower oil tube by seal 4, and big four 1 is in opening simultaneously, when there is the emergency episodes such as blowout, then closes variable bore ram 32 and reducing slips 31, safe and reliable.
In addition, the apparatus adaptability of lower oil tube of the present invention is strong.Because described seal 4 reducing scope is large, can cross box cupling, the described reducing for static seal half seals flashboard 32 and is all variable-diameter structure for anti-top reducing slips 31 simultaneously, can adapt to the needs of down-hole combined string.
Referring to Fig. 4, is a kind of in embodiment of the present invention process method flow chart of lower oil tube.A process for lower oil tube, comprising:
S1: under enter hanger plug 20 before, in oil pipe C, deliver blanking plug, realize pipe in shutoff;
S2: install double disc open flow device 3;
S3: install hanger plug 20, above carry described hanger plug 20, closes reducing half envelope flashboard 32 and reducing slips 31;
S4: after removal hanger 2, containing seat 33 is installed seal 4;
S5: open reducing half envelope flashboard 32 and reducing slips 31, first valve 50 at big four 1 place, carries out open flow;
S6: play oil pipe C.
S1: under enter hanger plug 20 before, in oil pipe C, deliver blanking plug, realize pipe in shutoff.
In oil pipe C, deliver blanking plug, after realizing the interior shutoff of pipe, also comprise and detect well head pressure, temperature, hydrogen sulfide content.Concrete, detect the pressure of well head accordingly, to judge described pressure whether in predetermined pressure limit; Detect the temperature of well head, to judge described temperature whether in predetermined temperature range; Detect the hydrogen sulfide content of well head, to judge described hydrogen sulfide content whether in predetermined scope.If all in predetermined scope, can determine to carry out lower oil tube operation with the equipment of lower oil tube of the present invention.
S2: install double disc open flow device 3.
After cover installs described double ram type preventer 3, also comprise and pressure testing is carried out to described double ram type preventer 3.Described process of double ram type preventer 3 being carried out to pressure testing completes by described hanger plug 20.Concrete, hanger plug 20 of the present invention is buckled in described hanger 2 by the screwed connection of lower end, and complete and connect and sealing, described hanger plug 20 has the function of shutoff, pressure testing, lifting short circuit simultaneously.During concrete pressure testing, first close described reducing half envelope flashboard 32, make it be embraced by described hanger plug 20, realize sealing; Then squeeze into pressure testing liquid from described hanger plug 20 upper end, described pressure testing liquid enters in described double ram type preventer 3 by the by-pass prot of described hanger plug 20; When pressure reaches rated pressure, complete pressure testing.Relative to existing pressure testing mode, during pressure testing, need hanger plug 20 to remove, again enter pressure-test short joint down and carry out pressure testing, not only saved operation, also eliminated pressure-test short joint.
S3: install hanger plug 20, above carry described hanger plug 20, closes reducing half envelope flashboard 32 and reducing slips 31.
In the whole rountrip process in oil field, such as, before carrying out lower oil tube, may need to carry out rod job.When carrying out rod job, need, at well head, big four 1 and controlled actuating oil-pumping unit device D are installed.For this reason, in the present invention, when carrying out lower oil tube operation, by installing the reliable shutoff that described hanger plug 20 can realize hanger 2 place on described hanger 2, remove controlled actuating oil-pumping unit device D and safety installation double ram type preventer 3 to guarantee safety.Complete in pipe after shutoff when delivering blanking plug to oil pipe C precalculated position, can carry out removing the sequence of operations such as controlled actuating oil-pumping unit equipment.
S4: after removal hanger 2, containing seat 33 is installed seal 4.
S5: open reducing half envelope flashboard 32 and reducing slips 31, first valve 50 at big four 1 place, carries out open flow.
S6: play oil pipe.
During operation, first valve 50 at big four 1 place is in opening, and is connected to fluid reservoir 6 by relief line 5; During lower oil tube, double ram type preventer 3 is in opening, as the emergent blowout control equipment of well control, only carries out removing of oil pipe by seal 4 movable sealing pipe box annular space.
Because the matching relationship between described seal 4 and tubing string is movable sealing, tubing string can rub with described seal 4 upper carrying in process, thus can produce wearing and tearing to described seal 4.When described seal 4 changed by needs, close described reducing half envelope flashboard 32.
When there is the emergency episodes such as blowout, first closing described reducing half envelope flashboard 32 and reducing slips 31, then closing described first valve 50.
The process of lower oil tube of the present invention, described seal 4 is adopted to seal annular space, the first valve 50 carrying out big four 1 place during rountrip is in opening to carry out annular space open flow, double ram type preventer 3 prevents upper top simultaneously, without the need to job platform, convenient working, the individual well activity duration, cost was 3, about 40,000 operation in 3 days.Remove for mechanism's lower oil tube operation by force relative to existing, substantially increase operating efficiency, reduce operating cost.
Secondly, operation process seals the operation of annular space lower oil tube by seal 4, and big four 1 is in opening simultaneously, when there is the emergency episodes such as blowout, then closes variable bore ram 32 and reducing slips 31, safe and reliable.
The foregoing is only several embodiments of the present invention, although the embodiment disclosed by the present invention as above, the embodiment that described content just adopts for the ease of understanding the present invention, is not intended to limit the present invention.Any those skilled in the art; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be done on the formal of embodiment and details; but scope of patent protection of the present invention, the scope that still must define with appended claims is as the criterion.

Claims (10)

1. an equipment for lower oil tube, is characterized in that, comprising: big four, hanger, hanger plug, double ram type preventer, seal,
Described big four comprises the first relative path, alternate path and relative third path, the 4th path, and described first path and wellhead flange are tightly connected, and described alternate path and described double ram type preventer are tightly connected; Described alternate path position is provided with hanger seat, for arranging described hanger hermetically, described third path and/or the 4th path being provided with relief line, described relief line is provided with the first valve;
Described hanger is the multidiameter of hollow, forms fluid course between itself and described big four, and it has the first relative auxiliary section and the second auxiliary section, and described first auxiliary section coordinates with described hanger seat, and described second auxiliary section is used for fixing oil pipe;
Described hanger plug, its lower end is fixed on described hanger hermetically;
Described double ram type preventer comprises reducing slips, reducing partly seals flashboard, is connected with containing seat described reducing slips up seal;
Described seal is arranged in described containing seat, and it, for being set in oil pipe periphery, realizes the movable sealing of oil pipe.
2. the equipment of lower oil tube as claimed in claim 1, it is characterized in that: it also comprises fluid reservoir, described relief line one end is communicated with described third path, and the other end is communicated with described fluid reservoir.
3. the equipment of lower oil tube as claimed in claim 2, it is characterized in that: described containing seat is outside equipped with oil-water recovering device, between described oil-water recovering device with described fluid reservoir, be provided with the draining pipeline that described oil-water recovering device can be communicated with described fluid reservoir.
4. the equipment of lower oil tube as claimed in claim 1, is characterized in that: described seal is for having flexible circular glue core, and its minimum diameter is less than the external diameter having treated flowline.
5. the equipment of lower oil tube as claimed in claim 1, is characterized in that: the equipment overall height of described lower oil tube is not higher than 550 millimeters.
6. a process for lower oil tube, is characterized in that, comprising:
Under enter hanger plug before, in oil pipe, deliver blanking plug, realize pipe in shutoff;
Double ram type preventer is installed;
Hanger plug is installed, above carries described hanger plug, close reducing half envelope flashboard and reducing slips;
Removal hanger, containing seat installs seal;
Open reducing half envelope flashboard and reducing slips, the first valve, carries out open flow;
Play oil pipe.
7. the process of lower oil tube as claimed in claim 6, is characterized in that: in oil pipe, deliver blanking plug, after realizing the interior shutoff of pipe, also comprises and detects well head pressure, temperature, hydrogen sulfide content.
8. the process of lower oil tube as claimed in claim 6, is characterized in that: when described seal changed by needs, closes described reducing and partly seal flashboard.
9. the process of lower oil tube as claimed in claim 6, is characterized in that: when there is gas blowout accident, first closes described reducing half envelope flashboard and reducing slips, then closes described first valve.
10. the process of lower oil tube as claimed in claim 6, is characterized in that: after described installation double ram type preventer, also comprise and carry out pressure testing to described double ram type preventer.
CN201510387235.5A 2015-06-30 2015-06-30 Device and technological method for pulling lower oil tube CN104975818B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105756600A (en) * 2016-05-11 2016-07-13 中国石油大学(华东) Deep well blowout emergency well-control equipment and operation method thereof
CN106894774A (en) * 2017-02-17 2017-06-27 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 A kind of underbalance changes pipe string technology method
CN109252826A (en) * 2018-10-31 2019-01-22 史敏敏 A kind of preventer being easy to fixed petroleum pipeline
CN111636922A (en) * 2020-06-05 2020-09-08 中国石油大学(北京) Jet impact crushing device and cavity bottom insoluble substance crushing and cleaning method

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071085A (en) * 1976-10-29 1978-01-31 Grable Donovan B Well head sealing system
US4550895A (en) * 1984-09-24 1985-11-05 Shaffer Donald U Ram construction for oil well blow out preventer apparatus
RU2164585C2 (en) * 1999-06-10 2001-03-27 Открытое акционерное общество "Станкотехника" АК "Туламашзавод" Preventer
US20050151099A1 (en) * 2004-01-14 2005-07-14 Cooper Cameron Corporation Pressure compensated shear seal solenoid valve
CN2771472Y (en) * 2004-11-17 2006-04-12 中国石油天然气股份有限公司 High temperature snubbing steam driving wallhead device
CN201087716Y (en) * 2007-08-27 2008-07-16 河北华北石油荣盛机械制造有限公司 Top-fixed slip expansion joint type operation device under pressure
CN201428415Y (en) * 2009-06-27 2010-03-24 东营市天亿石油工具制造有限公司 Quick pressure testing device of well mouth blowout preventer
CN201786310U (en) * 2010-09-17 2011-04-06 崔德秀 Self-sealing apparatus for oil and water well capable of quick mounting and dismounting
CN102359355A (en) * 2011-09-23 2012-02-22 中国石油天然气股份有限公司 Concentric-tube double-tube steam injection wellhead device
CN202300290U (en) * 2011-10-09 2012-07-04 中国石油天然气集团公司 Thermal recovery wellhead assembly of electric submersible pump
CN202937219U (en) * 2012-09-22 2013-05-15 盐城金龙达机械制造有限公司 Lip type conical surface self-seal blowout-preventive well repair device
CN203321435U (en) * 2013-06-05 2013-12-04 中国石油天然气股份有限公司 Dual-tube thermal-recovery wellhead device
CN203547638U (en) * 2013-11-06 2014-04-16 中国石油天然气集团公司 High-temperature tubing head metal sealing device
CN203626682U (en) * 2013-11-06 2014-06-04 中国石油天然气集团公司 SAGD (steam assisted gravity drainage) steam injection well head device

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071085A (en) * 1976-10-29 1978-01-31 Grable Donovan B Well head sealing system
US4550895A (en) * 1984-09-24 1985-11-05 Shaffer Donald U Ram construction for oil well blow out preventer apparatus
RU2164585C2 (en) * 1999-06-10 2001-03-27 Открытое акционерное общество "Станкотехника" АК "Туламашзавод" Preventer
US20050151099A1 (en) * 2004-01-14 2005-07-14 Cooper Cameron Corporation Pressure compensated shear seal solenoid valve
CN2771472Y (en) * 2004-11-17 2006-04-12 中国石油天然气股份有限公司 High temperature snubbing steam driving wallhead device
CN201087716Y (en) * 2007-08-27 2008-07-16 河北华北石油荣盛机械制造有限公司 Top-fixed slip expansion joint type operation device under pressure
CN201428415Y (en) * 2009-06-27 2010-03-24 东营市天亿石油工具制造有限公司 Quick pressure testing device of well mouth blowout preventer
CN201786310U (en) * 2010-09-17 2011-04-06 崔德秀 Self-sealing apparatus for oil and water well capable of quick mounting and dismounting
CN102359355A (en) * 2011-09-23 2012-02-22 中国石油天然气股份有限公司 Concentric-tube double-tube steam injection wellhead device
CN202300290U (en) * 2011-10-09 2012-07-04 中国石油天然气集团公司 Thermal recovery wellhead assembly of electric submersible pump
CN202937219U (en) * 2012-09-22 2013-05-15 盐城金龙达机械制造有限公司 Lip type conical surface self-seal blowout-preventive well repair device
CN203321435U (en) * 2013-06-05 2013-12-04 中国石油天然气股份有限公司 Dual-tube thermal-recovery wellhead device
CN203547638U (en) * 2013-11-06 2014-04-16 中国石油天然气集团公司 High-temperature tubing head metal sealing device
CN203626682U (en) * 2013-11-06 2014-06-04 中国石油天然气集团公司 SAGD (steam assisted gravity drainage) steam injection well head device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105756600A (en) * 2016-05-11 2016-07-13 中国石油大学(华东) Deep well blowout emergency well-control equipment and operation method thereof
CN106894774A (en) * 2017-02-17 2017-06-27 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 A kind of underbalance changes pipe string technology method
CN106894774B (en) * 2017-02-17 2019-04-16 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 A kind of underbalance replacement pipe string technology method
CN109252826A (en) * 2018-10-31 2019-01-22 史敏敏 A kind of preventer being easy to fixed petroleum pipeline
CN109252826B (en) * 2018-10-31 2021-02-26 台州智子科技有限公司 Blowout preventer easy to fix oil delivery pipe
CN111636922A (en) * 2020-06-05 2020-09-08 中国石油大学(北京) Jet impact crushing device and cavity bottom insoluble substance crushing and cleaning method

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