CN102268968B - Wellhead hydraulic force boosting method - Google Patents
Wellhead hydraulic force boosting method Download PDFInfo
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- CN102268968B CN102268968B CN 201110179141 CN201110179141A CN102268968B CN 102268968 B CN102268968 B CN 102268968B CN 201110179141 CN201110179141 CN 201110179141 CN 201110179141 A CN201110179141 A CN 201110179141A CN 102268968 B CN102268968 B CN 102268968B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 239000003921 oil Substances 0.000 claims abstract description 10
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims description 58
- 230000007306 turnover Effects 0.000 claims description 20
- 238000012546 transfer Methods 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 6
- 230000002153 concerted effect Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000003252 repetitive effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 6
- 239000003208 petroleum Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 206010024453 Ligament sprain Diseases 0.000 description 1
- 208000010040 Sprains and Strains Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to petroleum industrial equipment, in particular to a wellhead hydraulic force boosting device and a force boosting method. In the technical scheme, a piston is arranged in a hydraulic cylinder; an upper piston connecting rod is connected to the upper end of the piston; a lower piston connecting rod is connected to the lower end of the piston; the lower end of the lower piston connecting rod is a drill pipe connection screw thread which can be connected to a drilling tool in a well; a hydraulic cylinder upper pressure cap and a sealing piece are arranged on the top of the hydraulic cylinder; an anti-release pressure cap is arranged on the upper end of the upper connecting rod; a hydraulic cylinder flange plate capable of being in flanged connection with a wellhead blowout preventer is arranged at the bottom of the hydraulic cylinder; and a top oil input and output hole and a bottom oil input and output hole for inputting and outputting hydraulic oil are arranged on the upper and the lower ends of the hydraulic cylinder. The device and the method disclosed by the invention have the benefits that: by upwardly lifting the drilling tool through a large hook and upwardly and hydraulically lifting the drilling tool through the hydraulic cylinder, two portions of action forces are simultaneously applied on the drilling tool in the well so that the tension force of the drilling tool in the well is boosted, thus, the lifting capacity of current repair equipment is greatly increased.
Description
Technical field:
The present invention relates to a kind of petroleum industry equipment, particularly a kind of wellhead hydraulic force increasing method.
Background technology:
At present, the ratio of oil field clean-out crew and overhaul team is generally about 10:1, even higher, and light maintenance workover treatment equipment to have be that 250 model workover rig or tractor hoist add derrick combination greatly, its maximum pulling capacity only has 40T, what tractor hoist added derrick can be slightly higher, but also will never reach the load-carrying ability of large workover frame.When meeting the down-hole equipment bit freezing, hoisting power is not enough, when particularly using drilling rod to salvage unfreezing, the hoisting power of current repair equipment more highlights wretched insufficiency, at this moment, only has and considers to change overhaul facilities, overhaul troop be to wait on the one hand, manpower and materials and cost also wasted on the one hand.
Summary of the invention:
Purpose of the present invention is exactly in view of the foregoing defects the prior art has, provide a kind of convenience succinct, economical and practical wellhead hydraulic force increasing method, namely combine by carrying drilling tool and the fluid cylinder hydraulic pressure lifting drilling tool that makes progress on the hook, realize two parts active force to be applied to simultaneously in the well on the drilling tool and improve method for force increasing to drilling tool pulling force in the well, greatly improved the hoisting power of current repair equipment.
A kind of wellhead hydraulic force increasing device, its technical scheme is mainly to be comprised of connecting rod, piston, piston lower link, bottom turnover oilhole, fluid cylinder flange, drilling rod thread on connecting rod anticreep pressure cap, fluid cylinder upper pressing cap and seal, top turnover oilhole, fluid cylinder, hydraulic oil, the piston on the piston, be provided with piston in the described fluid cylinder, the upper end of piston is connected with connecting rod on the piston, the lower end is connected with the piston lower link, piston lower link lower end is the drilling rod thread, can connecting well in drilling tool; Be provided with fluid cylinder upper pressing cap and seal at the top of described fluid cylinder, upper small end has the anticreep pressure cap, the bottom of described fluid cylinder is provided with the fluid cylinder flange that can be connected with the wellhead blowout preventor flange, is provided with top turnover oilhole and the bottom turnover oilhole of liquid in-out force feed at the upper and lower side of fluid cylinder.
Above-mentioned fluid cylinder flange is provided with a plurality of screws, is connected with the upper flange plate of blowout preventer by bolt.
The upper and lower side of above-mentioned fluid cylinder is provided with top turnover oilhole and the bottom turnover oilhole of liquid in-out force feed, and by-pass valve control and snap joint can be installed as required, connects with the convenient hydraulic power supply of being connected with workover rig; Can keep the hydraulic oil in the fluid cylinder behind the valve closing, with easy disassembly with transport.
A kind of wellhead hydraulic force increasing method that the present invention mentions, mainly realized by following steps:
(a), utilize pipe nipple, the allotment down-hole equipment makes workover rig mention busy hour, oil pipe or drilling rod joint hoop expose blowout preventer upper flange plate end face, can stamp elevator as the optimum position;
(b), utilize the screw thread of piston lower link lower end, drilling tool in the connecting well is transferred fluid cylinder, by the fluid cylinder flange fluid cylinder is connected to the blowout preventer upper flange plate, and the top is passed in and out the hydraulic power supply that oilhole and bottom turnover oilhole are linked respectively workover rig; Close half (entirely) envelope blowout preventer of well head, consist of airtight pressure space with fluid cylinder; Elevator is beaten the exposed parts of connecting rod on piston, on carry hook, slowly be promoted to the maximum load rating of workover rig;
(c), utilize the hydraulic power supply of workover rig, to the fluid cylinder fuel feeding, form hydraulic lifting from bottom turnover oilhole, the reaction force of hydraulic lifting is applied on blowout preventer and the well head, forms reinforcement upwards; At this moment, along with the increase of hydraulic power source pressure, the load on the hook begins to descend;
(d), carry hook on slowly, make workover rig still reach maximum load rating, at this moment, the pressure of hydraulic power supply begins to descend; Start hydraulic power supply, along with the increase of hydraulic power source pressure, the load on the hook begins to descend again;
(e), carry hook on slowly, make workover rig still reach maximum load rating, at this moment, the pressure of hydraulic power supply begins to descend;
(f), repeat (d) and operation sequence (e), making a concerted effort of the lifting force that the pulling force that the hook that can make down-hole equipment obtain the workover rig drive makes progress and fluid cylinder inner carrier make progress, two parts active force can be applied on the drilling tool simultaneously, but the reaction force of this two parts power but acts on respectively on the derrick and well head on, having reduced single lifting equipment provides energetically design strength and risk;
(g), pump into hydraulic power from top turnover oilhole when needing unloaded loads, the load on this moment hook increases, and transfers hook, and load descends; Repeat to pump into hydraulic oil, hook load increases again, again transfers hook, reduces load, repetitive operation, until the pressure of complete discharge hydraulic power supply, it is normal that hook load recovers.
A kind of wellhead hydraulic force increasing method that the present invention proposes has following mentality of designing bright spot:
(a), this covering device is fully in terrestrial operation, need not be lowered in the sleeve pipe, can effectively avoid the complicated and extension of accident.
(b), this covering device provides lifting force upwards by fluid cylinder, the pulling force that makes progress that drilling tool in the well is provided with the derrick hook, become together and act on the upper lifting force on the drilling tool in the well, its reaction force act on respectively on the Wellhead packer and the derrick hook on, can effectively solve the single lifting equipment in ground and draw hypodynamic problem, and the reaction force of each component is far smaller than makes a concerted effort, and can not cause large damage and fracture to origin of force, operationalizes safe and reliable.
A kind of wellhead hydraulic force increasing device that the present invention proposes needs following condition to cooperate and finishes:
(a), the job site is equipped with half (entirely) envelope blowout preventer (Fig. 1);
(b), the scene has hydraulic pump to do hydraulic power supply.
More than two conditions, the operation field in each oil field can both reach at present, relevant requirements according to China Petrochemical Industry, the job execution scene is not detected half full envelope blowout preventer qualified and that pressure testing is qualified and is not allowed construction, and workover rig or tractor hoist have hydraulic pump effect hydraulic power supply to drive the instruments such as hydraulic tongs.
The present invention compared with prior art has following effect:
(a), only utilize half full envelope blowout preventer on hydraulic power supply on the workover rig and the well head four-way, to fluid cylinder sealing and fuel feeding, form hydraulic lifting, then cooperate on the hook and carry, two parts active force is applied on the interior drilling tool of well simultaneously, has greatly improved hoisting power, thereby has not needed to change overhaul facilities, put forward the unfreezing problem on just effectively solving energetically, reduced man power and material's cost.
(b), the upper lifting force of drilling tool surpasses when drilling tool disconnects suddenly in the yield force of bit freezing or the well in acting on well, owing to be subjected to the hydraulic damping restriction in the fluid cylinder, hook can not gone up suddenly the bullet string, cause large rope job-hopping or other accidents, derrick can be inviolent because of the load bust yet, significant springing sudden sprain, so it is more safe and reliable that the conventional simple workover rig of the present invention is proposed the activity unfreezing on energetically, is fit to promote.
Description of drawings:
Accompanying drawing 1 is the existing well head big four in oil field and half full envelope blowout preventer;
Accompanying drawing 2 is exactly structural representation of the present invention;
Accompanying drawing 3 is exactly the present invention and the schematic diagram of half full envelope blowout preventer to connecting;
Among the upper figure: connecting rod anticreep pressure cap 1, fluid cylinder upper pressing cap and seal 2, top pass in and out connecting rod 6 on oilhole 3, fluid cylinder 4, hydraulic oil 5, the piston, piston 7, piston lower link 8, bottom turnover oilhole 9, fluid cylinder flange 10, drilling rod thread 11 on the piston.
The specific embodiment:
Accompanying drawing 1 is oil field well head big four commonly used and half full envelope blowout preventer, is must safe well head facility in the underground work process.Its connected mode is flange plate type and connects, and this also is that petroleum industry equipment is the most frequently used, most convenient, one of the most quick, the most effective high pressure connected mode.Half full envelope blowout preventer can provide the operating pressure of movable sealing 18MPa, static seal 35 MPa in construction, and fluid cylinder is when providing the lifting force of 0-32 ton, only need the diameter of this data based fluid cylinder of hydraulic pressure, piston, connecting rod of 0-12 MPa adjustable, so this blowout preventer cooperates fluid cylinder to use, and can satisfy the sealing needs fully.
Fluid cylinder flange accompanying drawing 2 of the present invention is exactly that connected mode by flange links to each other with half full envelope blowout preventer in the wellhead assembly.The present invention mainly is comprised of connecting rod 6, piston 7, piston lower link 8, bottom turnover oilhole 9, fluid cylinder flange 10, drilling rod thread 11 on connecting rod anticreep pressure cap 1, fluid cylinder upper pressing cap and seal 2, top turnover oilhole 3, fluid cylinder 4, hydraulic oil 5, the piston on the piston, be provided with piston 7 in the described fluid cylinder 4, the upper end of piston 7 is connected with connecting rod 6 on the piston, the lower end is connected with piston lower link 8, piston lower link 8 lower ends are drilling rod thread 11, can connecting well in drilling tool; Be provided with fluid cylinder upper pressing cap and seal 2 at the top of described fluid cylinder 4, upper small end has the anticreep pressure cap, the bottom of described fluid cylinder 4 is provided with the fluid cylinder flange 10 that can be connected with the wellhead blowout preventor flange, is provided with top turnover oilhole 3 and the bottom turnover oilhole 9 of liquid in-out force feed at the upper and lower side of fluid cylinder 4.
Accompanying drawing 3 is exactly the present invention and the schematic diagram of half full envelope blowout preventer to connecting, and piston lower link 8 wherein is connected by the box cupling of the interior drilling tool of drilling rod thread 11 and well; Then the fluid cylinder flange is connected with half full envelope blowout preventer flange.
A kind of wellhead hydraulic force increasing device that the present invention proposes, need to carry out following operating procedure and realize:
(a), utilize pipe nipple, the allotment down-hole equipment makes down-hole equipment when workover rig is mentioned maximum rated load, oil pipe or drilling rod joint hoop expose blowout preventer flange upper surface, can stamp elevator is the optimum position;
(b), utilize the screw thread of piston lower link, drilling tool in the connecting well.Transfer this device, by fluid cylinder flange 10 fluid cylinder 4 is connected to the blowout preventer upper flange plate, the top is passed in and out the hydraulic power supply that oilhole 3 and bottom turnover oilhole 9 is linked respectively workover rig.Close half (entirely) envelope blowout preventer of well head, consist of airtight pressure space with fluid cylinder; Elevator is beaten the exposed parts of connecting rod on piston, by connecting rod anticreep pressure cap bearing tension on the piston.On carry hook, slowly be promoted to the maximum load rating of workover rig.
(c), utilize the hydraulic power source of workover rig, from 9 pairs of fluid cylinder 4 fuel feeding of bottom turnover oilhole, form hydraulic lifting, the reaction force of hydraulic lifting is applied on blowout preventer and the well head, forms reinforcement upwards; At this moment, along with the increase of hydraulic power source pressure, the load on the hook begins to descend.
(d), carry hook on slowly, make workover rig still reach maximum load rating, at this moment, the pressure of hydraulic power supply begins to descend; Start hydraulic power supply, along with the increase of hydraulic power source pressure, the load on the hook begins to descend again.
(e), carry hook on slowly, make workover rig still reach maximum load rating, at this moment, the pressure of hydraulic power supply begins to descend.
(f), repeat (d) and operation sequence (e), making a concerted effort of the lifting force that the pulling force that the hook that can make down-hole equipment obtain the workover rig drive makes progress and liquid cylinder piston make progress, two parts active force can be applied on the drilling tool simultaneously, but the reaction force of this two parts power but acts on respectively on the derrick and well head on, having reduced single lifting equipment provides energetically design strength and risk.
(g), pump into hydraulic power from top turnover oilhole 3 when needing unloaded loads, the load on this moment hook increases, and transfers hook, and load descends; Repeat to pump into hydraulic oil, hook load continues to increase, and again transfers hook, reduces load, repetitive operation, until the pressure of complete discharge hydraulic power supply, it is normal that hook load recovers.
Wherein, charge oil pressure according to workover rig itself with hydraulic pump determine (generally between 0-14MPa); Driller and hydraulic pump operating personnel match, and fuel feeding limit, limit promotes or transfer on fuel feeding limit, limit.
A kind of wellhead hydraulic force increasing device that the present invention proposes, its technical data:
Fluid cylinder internal diameter ∮ 200mm;
Piston stroke 3m(is effective travel 〉=2.5m) wherein;
Fluid cylinder pressure-bearing 30MPa
Fluid cylinder internal pressure 8MPa=21.6t 10MPa=27t 12MPa=32.4t
Connecting rod ∮ 80mm on the piston;
Piston lower link ∮ 73mm;
Annotate: the diameter of fluid cylinder, piston, upper and lower strut can be adjusted as required under the premise that security is guaranteed.
A kind of wellhead hydraulic force increasing device that the present invention proposes, its processing and fabricating requires:
A. the piston upper and lower strut uses the round steel processing of drilling rod or ∮ 70-80mm, and tensile strength requires to be not less than 80 tons.
B. half full envelope blowout preventer is 2SFZ18-35 type or the close model of function, can provide movable sealing 18MPa, the sealing load of quiet close 35 MPa.
C. the fluid cylinder body is safe and reliable, and pressure-bearing is not less than 30MPa.
D. after using the bottom is sealed, exempt from into earth and foreign material, keep cleaning in the fluid cylinder, lubricated.
E. time-based maintenance is avoided getting rusty.
Claims (1)
1. wellhead hydraulic force increasing method is characterized in that mainly being realized by following steps:
(a), utilize pipe nipple, the allotment down-hole equipment makes workover rig mention busy hour, oil pipe or drilling rod joint hoop expose blowout preventer upper flange plate end face, can stamp elevator as the optimum position;
(b), utilize the screw thread of piston lower link (8) lower end, the connecting downhole drilling tool, transfer fluid cylinder, by fluid cylinder flange (10) fluid cylinder (4) is connected to the blowout preventer upper flange plate, the top is passed in and out the hydraulic power supply that oilhole (3) and bottom turnover oilhole (9) is linked respectively workover rig; Close half full envelope blowout preventer of well head, consist of airtight pressure space with fluid cylinder; Elevator is beaten the exposed parts of connecting rod on piston, on carry hook, slowly be promoted to the maximum load rating of workover rig;
(c), utilize the hydraulic power supply of workover rig, to fluid cylinder (4) fuel feeding, form hydraulic lifting from bottom turnover oilhole (9), the reaction force of hydraulic lifting is applied on blowout preventer and the well head, forms reinforcement upwards; At this moment, along with the increase of hydraulic power source pressure, the load on the hook begins to descend;
(d), carry hook on slowly, make workover rig still reach maximum load rating, at this moment, the pressure of hydraulic power supply begins to descend;
(e), start hydraulic power supply, along with the increase of hydraulic power source pressure, the load on the hook begins to descend again;
(f), carry hook on slowly, make workover rig still reach maximum load rating, at this moment, the pressure of hydraulic power supply begins to descend;
(g), repeat (e) and operation sequence (f), making a concerted effort of the lifting force that the pulling force that the hook that can make down-hole equipment obtain the workover rig drive makes progress and fluid cylinder inner carrier make progress, two parts active force can be applied on the down-hole equipment simultaneously, but the reaction force of this two parts power but acts on respectively on the derrick and well head on, having reduced single lifting equipment provides energetically design strength and risk;
(h), pass in and out oilhole (3) from the top when needing unloaded loads and pump into hydraulic power, the load on this moment hook increases, and transfers hook, load descends; Repeat to pump into hydraulic oil, hook load increases again, again transfers hook, reduces load, repetitive operation, until the pressure of complete discharge hydraulic power supply, it is normal that hook load recovers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110179141 CN102268968B (en) | 2011-06-29 | 2011-06-29 | Wellhead hydraulic force boosting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110179141 CN102268968B (en) | 2011-06-29 | 2011-06-29 | Wellhead hydraulic force boosting method |
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| Publication Number | Publication Date |
|---|---|
| CN102268968A CN102268968A (en) | 2011-12-07 |
| CN102268968B true CN102268968B (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110179141 Expired - Fee Related CN102268968B (en) | 2011-06-29 | 2011-06-29 | Wellhead hydraulic force boosting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110566145A (en) * | 2019-10-19 | 2019-12-13 | 海塔石油科技有限公司 | Well workover salvage reinforcement auxiliary device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2532238Y (en) * | 2001-10-18 | 2003-01-22 | 吉林大学 | Hydraulic ground hole pipe lift |
| CN2563289Y (en) * | 2002-04-12 | 2003-07-30 | 张积明 | Hydraulic oil pipe unlocking device for repairing well |
| CN2668828Y (en) * | 2004-01-08 | 2005-01-05 | 中国海洋石油总公司 | Portal hydraulic lifter for drilling and repairing well of petroleum |
| CN202266205U (en) * | 2011-10-25 | 2012-06-06 | 胜利油田东胜精攻石油开发集团股份有限公司 | Wellhead hydraulic force increasing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020197115A1 (en) * | 2001-06-22 | 2002-12-26 | Pgs Offshore Technology As | Pneumatic/hydrostatic riser tension |
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2011
- 2011-06-29 CN CN 201110179141 patent/CN102268968B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2532238Y (en) * | 2001-10-18 | 2003-01-22 | 吉林大学 | Hydraulic ground hole pipe lift |
| CN2563289Y (en) * | 2002-04-12 | 2003-07-30 | 张积明 | Hydraulic oil pipe unlocking device for repairing well |
| CN2668828Y (en) * | 2004-01-08 | 2005-01-05 | 中国海洋石油总公司 | Portal hydraulic lifter for drilling and repairing well of petroleum |
| CN202266205U (en) * | 2011-10-25 | 2012-06-06 | 胜利油田东胜精攻石油开发集团股份有限公司 | Wellhead hydraulic force increasing device |
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| CN102268968A (en) | 2011-12-07 |
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