CN102561975B - Lifting pressurized well-repairing technology in closed oil pipe - Google Patents

Lifting pressurized well-repairing technology in closed oil pipe Download PDF

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Publication number
CN102561975B
CN102561975B CN201210000902.6A CN201210000902A CN102561975B CN 102561975 B CN102561975 B CN 102561975B CN 201210000902 A CN201210000902 A CN 201210000902A CN 102561975 B CN102561975 B CN 102561975B
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CN
China
Prior art keywords
pressure
oil pipe
lifting
well
chamber
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Expired - Fee Related
Application number
CN201210000902.6A
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Chinese (zh)
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CN102561975A (en
Inventor
徐迎新
孙虎
周丰
刘国良
张冕
韩文哲
牛俊峰
邓继学
魏建荣
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Changqing Downhole Operation Co of CNPC Chuanqing Drilling Engineering Co Ltd
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Changqing Downhole Operation Co of CNPC Chuanqing Drilling Engineering Co Ltd
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Priority to CN201210000902.6A priority Critical patent/CN102561975B/en
Publication of CN102561975A publication Critical patent/CN102561975A/en
Application granted granted Critical
Publication of CN102561975B publication Critical patent/CN102561975B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention relates to a lifting pressurized well-repairing technology in a closed oil pipe. The technology at least comprises the following steps: 1) mounting equipment, namely, mounting a lifting pressurized well-repairing device in the closed oil pipe; 2) fishing an oil pipe hanger under pressure; 3) lifting a pipe strand in the well under pressure; 4) holding a detaching buckle under pressure; 5) holding and lifting for a small distance under pressure; 6) dividing high-pressure and low-pressure chambers; and 7) lifting the oil pipe under normal pressure. According to the technology, a pressurized unplugged oil pipe in an oil-gas well is actively lifted up and pressed down in the high-pressure chamber of the device; the operations of holding the oil pipe in the high-pressure chamber and tools in the well and assembling and disassembling the buckle are performed according to an operation requirement; the separation of the high pressure and low pressure in the chamber is realized; the normal-pressure lifting/drilling operation can be completed by an operator at the well head; and the problem of safety lifting/ drilling operation for the unplugged pipe strand in pressurized operation in the oil-gas well is efficiently solved.

Description

Lifting pressurized well-repairing technology in closed oil pipe
Technical field
The present invention relates to Oil/gas Well workover process technology with pressure, particularly a kind of lifting pressurized well-repairing technology in closed oil pipe.Belong to exploitation of oil-gas field field of mechanical technique.
Background technology
In recent years along with the increasing of oil-gas field development dynamics, it is increasing that Oil/gas Well Operating Pressure accounts for the workload ratio of underground work, and corresponding Operating Pressure equipment tool develops hysteresis relatively, existing Operating Pressure equipment can not be realized pipe string in unplugged well is carried out to airtight with pressure removing, there is greater risk in operation process, cannot really realize the essential safety of Operating Pressure.
At present, the Operating Pressure equipment using in oil gas field all will stop up the oil pipe in well, this is the first step of carrying out Operating Pressure, and oil pipe in well is through flow-induced corrosion for many years, occur that serious fouling, perforation, burn into carry out oil pipe blocking and can not once finish the work, although and the type of blanking plug, model are different, can not be useful in all construction wells, construct with larger suffering and risk to Operating Pressure.Be both, well head operating personnel are half environmental work with pressure, be faced with at any time well inner high voltage fluid and go out the risk of well head, personnel's safety can not be from being guaranteed in essence, must there is the oil gas water of high pressure to rush at ground staff, make operating personnel injured or poisoning, and current equipment cannot be avoided this fatal shortcoming.Thus, efficiently a kind of in the urgent need to developing, can accurately control and realize and will hang on request with the oil pipe without stopping up in pressure device, and airtight lifting with pressure or the power set that press down and technique thereof.
Summary of the invention
The object of this invention is to provide a kind of lifting pressurized well-repairing technology in closed oil pipe, can not stop up oil pipe initiatively lifting and pressing down in the high pressure chest of device by with pressure in Oil/gas Well, according to operation needs, in high pressure chest to instrument righting in oil pipe and well and on, shackle operation, in implement device chamber, high-low pressure is separated, and makes well head operating personnel realize normal pressure round trip.Well solve the safely tripping operation of not stopping up pipe string in the well of Oil/gas Well Operating Pressure.
The technical solution adopted for the present invention to solve the technical problems is: design a kind of lifting pressurized well-repairing technology in closed oil pipe, it is characterized in that: at least comprise the steps:
Step 1, equipment are installed, that is: the installation of lifting well repairing device with pressure in closed oil pipe;
Step 2, fishing oil pipe hanger with pressure;
Pipe string in step 3, lifting well with pressure;
Step 4, righting shackle with pressure;
In step 5, small distance righting with pressure, carry;
Step 6, cut apart high pressure-low pressure chamber;
Step 7, normal pressure play oil pipe.
Lifting well repairing device with pressure in described closed oil pipe, from top to bottom successively sequentially by unscrewing device, full envelope with pressure chamber in wellhead platform operation window, annular working preventer with pressure, blowout prevention operation chamber with pressure, rotation righting lifting-up device, balance four-way pipe nipple, rotation righting, flashboard, airtight interior lifting remove device, sealing internal slip is threaded and forms.
In described closed oil pipe, lifting well repairing device latus rectum with pressure is 180mm, 60 tons of maximum lifting capacities, and maximum presses down 40 tons of abilities, peak torque 3000NM; Maximum seal construction pressure 35MPa.
In described closed oil pipe, lifting well repairing device with pressure is applicable to construction medium oil water gas medium.
Described annular working preventer with pressure is 35MPa annular working preventer with pressure.
Advantage of the present invention is: by adopting rotation righting lifting-up device in contrive equipment by oil pipe handling one segment distance up and down, make oil pipe in Operating Pressure dress complete on request rotation, on put playing function, well solved the oil pipe regular motion in the device chamber of Oil/gas Well Operating Pressure ;by adopting unscrewing device in the rotation righting in contrive equipment, drive oil pipe is rotated, what complete that oil in high pressure chest carries out oil pipe in high pressure chest above buckles shackle action, has well realized connection and the disassembling function of instrument in oil pipe in the device chamber of Oil/gas Well Operating Pressure and other well; By adopting the airtight interior lifting in contrive equipment to remove device, can by with in enclosed high pressure chamber in pressure device without stop up oil pipe automatic lifting with pressure and press down, this process loops, can be by Oil/gas Well and with the oil pipe continuance lifting in pressure device high pressure chest and transferring, completing that the not kill-job of high-pressure well inner oil tube is with pressure removes the operation of instrument pipe string, is the power set that remove without the oil pipe stopping up with pressure in high pressure chest.In construction, pass through the application of lifting well repairing device with pressure in closed oil pipe, can will hang on request with the oil pipe without stopping up in pressure device, can make the oil pipe in Operating Pressure dress complete on request safe round trip, well solve enclosed high pressure environment in the device chamber of the Oil/gas Well Operating Pressure safe rountrip without the oil pipe stopping up.In energy implement device chamber, high-low pressure is separated, and makes well head operating personnel realize normal pressure round trip.A whole set of equipment latus rectum 180mm, 60 tons of maximum lifting capacities, maximum presses down 40 tons of abilities, peak torque 3000NM.Maximum seal construction pressure 35MPa, is applicable to construction medium oil water gas medium.
Brief description of the drawings
Below in conjunction with embodiment accompanying drawing, the invention will be further described, but not as a limitation of the invention.
Fig. 1 is embodiment of the present invention flow chart;
Fig. 2 is the structural representation of lifting well repairing device with pressure in closed oil pipe used in Fig. 1 flow process.
In figure: 1, wellhead platform operation window; 2, annular working preventer with pressure; 3, blowout prevention operation chamber with pressure; 4, rotation righting lifting-up device; 5, balance four-way pipe nipple; 6, unscrewing device in rotation righting; 7, flashboard in full envelope with pressure chamber; 8, airtight interior lifting removes device; 9, sealing internal slip.
Detailed description of the invention
The structure not describing in detail in an embodiment, its structure is identical with existing known structure.
Embodiment 1
Lifting pressurized well-repairing technology in closed oil pipe, is characterized in that: at least comprise the steps:
Step 1, equipment are installed, that is: the installation of lifting well repairing device with pressure in closed oil pipe;
Step 2, fishing oil pipe hanger with pressure;
Pipe string in step 3, lifting well with pressure;
Step 4, righting shackle with pressure;
In step 5, small distance righting with pressure, carry;
Step 6, cut apart high pressure-low pressure chamber;
Step 7, normal pressure play oil pipe.
Embodiment 2
As shown in Figure 1, in the time carrying out Oil/gas Well Operating Pressure, by adopting this technique, can not stop up oil pipe initiatively lifting and pressing down in the high pressure chest of device by with pressure in Oil/gas Well, according to operation needs, in high pressure chest to instrument righting in oil pipe and well and on, shackle operation,, high-low pressure separation, makes well head operating personnel realize normal pressure round trip in implement device the chamber in.
Step detailed annotation is as follows:
Step 1, equipment are installed, that is: the installation of lifting well repairing device with pressure in closed oil pipe;
1), check the also interior lifting well repairing device with pressure of the mounted closed oil pipe of pressure testing;
2), at well head, OIH pipe is blocked up temporarily with temporarily stifled instrument in well mouth oil pipe, make oil pipe keep at short notice blocking up temporarily state, well head oil pressure is 0;
3), set up operating platform at well head, connect lifting well repairing device with pressure stable with scaffold in closed oil pipe, connect the hydraulic line of the interior lifting well repairing device with pressure of well head closed oil pipe and Hydraulic Station, oil pipe lifting mast and platform ladder and escaping slideway are installed;
4), set up mast, mast base is sitting on well head base for supporting, and sets up respectively to four direction by four wire rope mast top, thereby stablizes mast;
5), put hydraulic power sled, the hydraulic line that connection is communicated with well head.
Step 2, fishing oil pipe hanger with pressure;
The temporary block apparatus of taking-up oil pipe with pressure on apparatus platform, boll-weevil hanger.
Pipe string in step 3, lifting well with pressure;
Adopt airtight interior lifting with pressure remove device 8 in the high pressure chest of blowout prevention operation chamber 3 with pressure winding shaft inner oil tube to setting height.
Step 4, righting shackle with pressure;
Adopt unscrewing device 6 in tubing spinning righting with pressure to carry out shackle to the high pressure chest internal upper part oil pipe of blowout prevention operation chamber 3 with pressure, make it depart from bottom pipe string.
In step 5, small distance righting with pressure, carry;
Adopt tubing spinning righting lifting-up device 4 with pressure in the high pressure chest of operation chamber 3 with pressure blowout prevention, in first oil pipe short distance, to carry.
Step 6, cut apart high pressure-low pressure chamber;
Close the full seal apparatus in the high pressure chest of blowout preventer operation chamber 3 with pressure, cut apart high-low pressure region.
Step 7, normal pressure play oil pipe;
The low pressure chamber sealing import of opening blowout preventer operation chamber 3 with pressure, proposes the oil pipe in low pressure chamber.
Step 8, close the low pressure chamber import of blowout prevention operation chamber 3 with pressure, carry out pressure balance.
Step 9, open the full seal apparatus of high pressure chest of blowout prevention operation chamber 3 with pressure, carry out the lifting of next root oil pipe.
Step 10, repeat above step, the airtight safety that realizes OIH pipe pulls out of hole.
Step 11, device going down process and trip-out process reversed in order, principle is identical.
As shown in Figure 2, lifting well repairing device with pressure in described closed oil pipe, from top to bottom successively sequentially by unscrewing device 6, full envelope with pressure chamber in wellhead platform operation window 1, annular working preventer 2 with pressure, blowout prevention operation chamber 3 with pressure, rotation righting lifting-up device 4, balance four-way pipe nipple 5, rotation righting, flashboard 7, airtight interior lifting remove device 8, sealing internal slip 9 is threaded and forms.The latus rectum 180mm of lifting well repairing device with pressure in described closed oil pipe, 60 tons of the maximum lifting capacities of the described interior lifting well repairing device with pressure of closed oil pipe, maximum presses down 40 tons of abilities, peak torque 3000NM, maximum seal construction pressure 35MPa.Be applicable to construction medium oil water gas medium.Described annular working preventer 2 with pressure is 35MPa annular working preventer with pressure.
The operating principle of lifting well repairing device with pressure in closed oil pipe of the present invention
Application by this process unit can will be hung on request with the oil pipe without stopping up in pressure device, and airtight lifting with pressure or press down, remove the stroke of device by airtight interior lifting, can by with in enclosed high pressure chamber in pressure device without stop up oil pipe automatic lifting with pressure and press down, this process loops, can be by Oil/gas Well and with the oil pipe continuance lifting in pressure device high pressure chest and transferring, complete that the not kill-job of high-pressure well inner oil tube is with pressure removes the operation of instrument pipe string.Can make the oil pipe in Operating Pressure dress complete on request safe round trip by the application of this instrument, well solve enclosed high pressure environment in the device chamber of the Oil/gas Well Operating Pressure rountrip without the oil pipe stopping up.
Related technology in step in the present invention
(1) tubing spinning righting lift technique with pressure
This technology the oil pipe with in pressure device to be carried out to righting placed in the middle, inner core chamber can be rotated with oil pipe, and by specific mechanism, by oil pipe handling one segment distance up and down, by the application of this instrument can make oil pipe in Operating Pressure dress complete on request rotation, on put playing function, well solved the oil pipe regular motion in the device chamber of Oil/gas Well Operating Pressure.Work internal diameter 30-180mm, can be with the passive rotation of oil pipe, provides the clamping oil pipe handling distance of 300-500mm, handling weight 200-500kg.
Operating principle: adopt 35MPa annular working preventer manufacturing process manufacturing installation shell with pressure and be connected compass, adopting rotating blowout preventer packing element technology that drilling tool is carried out to righting placed in the middle, and can passively rotate.Adopt and female revolve screw rod principle the packing element after holding tightly is promoted or transferred, and drive by hydraulic power.
(2) the upper shackle technology of Operating Pressure band pressuring oil pipe righting rotation
This technology can be carried out the oil pipe with in pressure device righting time placed in the middle, in equipment, distinctive structure and instrument can drive oil pipe to be rotated, complete the upper button shackle action of high pressure chest inner oil tube, can make the oil pipe in Operating Pressure dress complete on request the upper shackle function of two oil pipes at box cupling position by the application of this instrument, in simultaneously also can completed well, other instrument connects and the function of shackle in high pressure chest, has well solved oil pipe in the device chamber of Oil/gas Well Operating Pressure and connection and the disassembling function of the interior instrument of other well.Work internal diameter 30-180mm, can clamp oil pipe oil pipe active rotation, and the upper shackle moment of torsion of 3000NM is provided, and passively moves up and down apart from 0-100mm with drilling tool.
Operating principle: adopt 35MPa annular working preventer manufacturing process manufacturing installation shell with pressure and be connected compass, on employing oil pipeline, that drilling tool is carried out to righting is placed in the middle for shackle hydraulic tongs art, and can active rotation.Adopt free rod principle that the pincers tooth after holding tightly is carried out to passive lifting or transfers, drive by hydraulic power.
(3) Lifting Technique in closed oil pipe
This technology can will hang on request with the oil pipe without stopping up in pressure device, and airtight lifting with pressure or press down, remove the stroke of device by airtight interior lifting, can by with in enclosed high pressure chamber in pressure device without stop up oil pipe automatic lifting with pressure and press down, this process loops, can be by Oil/gas Well and with the oil pipe continuance lifting in pressure device high pressure chest and transferring, completing that the not kill-job of high-pressure well inner oil tube is with pressure removes the operation of instrument pipe string, is the power set that remove without the oil pipe stopping up with pressure in high pressure chest.This equipment has the airtight lifting capacity of 60 tons, and the drilling tool of 40 tons presses down ability, and entrained poppet can be realized and drilling tool in the well of 60 tons of weights is carried out to not damaged catch and grab and hang.Airtight interior lifting stroke 0-3 rice.
Operating principle: adopt 35MPa annular working preventer manufacturing process manufacturing installation shell with pressure and be connected compass, adopting bi-directional slip that oil pipe righting is hung between two parties, adopting initiatively nut rotation, the stator principle of moving about, drain line under lifting.Drive by hydraulic power.
(4) well head weight support+mast oil pipe removes technology
If the weight of drilling tool is all carried on well head tap in the weight of wellheadpressure working equipment and well, injury to well head tap is larger, and whole apparatus for work is also unstable, for above situation, research and develop the full support technology of wellhead equipment, the weight of wellhead equipment and operating platform can be absorbed by supported device completely, and support at well head, simultaneously, braced structures has also taken into full account the principle of wellheadpressure operation, below the interior lifting device of well head, four support posts are installed in addition with, the weight of drilling tool in well has also been loaded in well head braced structures, thereby realize the whole process protection to well head tap, bracing or strutting arrangement can provide the wellhead assembly support force of 5-8 ton, drilling tool support force in the well of 50 tons.
Consider the needs of operation simultaneously, design the oil pipe mast that makes a trip, adopt this instrument, oil pipe can be lifted by crane as required and puts into well or trip out from well, simultaneously, this mast also can be shaft mouth operating bench and hangs oneself and send construction tool, 25 meters of mast heights, effectively 2 tons of hoisting weights, mast base is arranged on the basis of well head bracing or strutting arrangement, adopt two bolts to be connected to wellhead assembly and stablize, simultaneously auxiliary stable at mast top La Si road guy wire.
(5) skid hydraulic power+microelectronics logic control technology
The power of this technology is hydraulic power, well head is respectively installed the hydraulic power providing by hydraulic power source and the mast that hoists provides power, power resources are the independent skid power set that arrange, skid power set mainly contain Diesel engine, hydraulic pressure power takeoff, linked parking device, control device composition and the hydraulic oil container of not wanting, fuel tank, heat abstractor, control device composition, can provide lasting stable hydraulic power for wellheadpressure apparatus for work.The effective output that device arranges is 80-100KW, and diesel is 200KW Yi Weike motor, the inferior speed changer of Ali.
Complete equipment has been selected microelectronics logic control technology simultaneously, the induction of well intrinsic parameter and data transmission set have been installed in each wellhead assembly relevant position, by precise information collection and the calculating of computer, the duty of equipment can be carried out to appropriate calculating and simulation, and send work request to operating personnel, if responded, computer can be controlled corresponding hydraulic control valve member and carry out round trip, lower the error rate of equipment, improve device security workability, in the time carrying out operation, can far control the various operations of equipment, by each operating position, all concentrate in operating room, all operated by a people, guarantee accuracy and the security reliability of operation.

Claims (1)

1. lifting pressurized well-repairing technology in closed oil pipe, is characterized in that: at least comprise the steps: step 1, equipment installation, that is: the installation of lifting well repairing device with pressure in closed oil pipe; Step 2, fishing oil pipe hanger with pressure; Pipe string in step 3, lifting well with pressure; Step 4, righting shackle with pressure; In step 5, small distance righting with pressure, carry; Step 6, cut apart high pressure-low pressure chamber; Step 7, normal pressure play oil pipe; The low pressure chamber sealing import of opening blowout preventer operation chamber with pressure (3), proposes the oil pipe in low pressure chamber; Step 8, close the low pressure chamber import of blowout prevention operation chamber with pressure, carry out pressure balance; Step 9, open the full seal apparatus of high pressure chest of blowout prevention operation chamber with pressure, carry out the lifting of next root oil pipe; Step 10, repeat above step, the airtight safety that realizes OIH pipe pulls out of hole; Step 11, device going down process and trip-out process reversed in order, principle is identical; Lifting well repairing device with pressure in described closed oil pipe, from top to bottom successively sequentially by unscrewing device (6), full envelope with pressure chamber in wellhead platform operation window (1), annular working preventer with pressure (2), blowout prevention operation chamber with pressure (3), rotation righting lifting-up device (4), balance four-way pipe nipple (5), rotation righting, flashboard (7), airtight interior lifting remove device (8), sealing internal slip (9) is threaded and forms; In described closed oil pipe, lifting well repairing device latus rectum with pressure is 180mm, 60 tons of maximum lifting capacities, and maximum presses down 40 tons of abilities, peak torque 3000NM; Maximum seal construction pressure 35MPa; In described closed oil pipe, lifting well repairing device with pressure is applicable to construction medium oil water gas medium; Described annular working preventer with pressure (2) is 35MPa annular working preventer with pressure.
CN201210000902.6A 2012-01-04 2012-01-04 Lifting pressurized well-repairing technology in closed oil pipe Expired - Fee Related CN102561975B (en)

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CN104420841B (en) * 2013-08-30 2017-04-05 中国石油天然气股份有限公司 The method for removing flow string with pressure
CN103573224A (en) * 2013-10-21 2014-02-12 联合石油天然气投资有限公司 Technology for fishing oil under pressure
CN104329040B (en) * 2014-08-20 2018-06-08 中国石油化工股份有限公司 Play long well section perforating gun technique and dedicated unit
CN111119758A (en) * 2020-02-10 2020-05-08 于燕 Use method of self-balancing under-pressure operation device adopting directional slips

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CN2711380Y (en) * 2004-06-17 2005-07-20 韩永利 Apparatus for anti-blowout during snubbing serving for full-sealing zero-pressure conversion oil-water well
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