CN106285528A - The pressure control device of continuous cyclic drilling - Google Patents

The pressure control device of continuous cyclic drilling Download PDF

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Publication number
CN106285528A
CN106285528A CN201610856284.3A CN201610856284A CN106285528A CN 106285528 A CN106285528 A CN 106285528A CN 201610856284 A CN201610856284 A CN 201610856284A CN 106285528 A CN106285528 A CN 106285528A
Authority
CN
China
Prior art keywords
flashboard
bearing
load
drilling
slip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610856284.3A
Other languages
Chinese (zh)
Inventor
马金山
齐金涛
徐朝阳
郗凤亮
苏尚文
屈至明
徐海潮
魏臣兴
郭云鹏
胡志坚
肖建秋
梁国红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNPC Bohai Drilling Engineering Co Ltd
Original Assignee
CNPC Bohai Drilling Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CNPC Bohai Drilling Engineering Co Ltd filed Critical CNPC Bohai Drilling Engineering Co Ltd
Priority to CN201610856284.3A priority Critical patent/CN106285528A/en
Publication of CN106285528A publication Critical patent/CN106285528A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure

Abstract

The invention discloses the pressure control device of a kind of continuous cyclic drilling, it includes body, a through hole passed for drilling rod it is formed with in the middle part of body, four flashboards it are also equipped with in the through hole of body, each flashboard is spliced by half flashboard of two symmetrical configuration respectively, and each half flashboard is driven by a fluid cylinder respectively;Four flashboards are respectively blind rams, slip flashboard, load-bearing flashboard and the pipe ram set gradually from top to bottom, and wherein blind rams, load-bearing flashboard and pipe ram be arranged in parallel, and slip flashboard and load-bearing flashboard are that 90 ° of crosses are crisscross arranged.The present invention can decrease and connect, unloads the pressure oscillation of well head when single or thribble stops and starting the cycle over, keep stablizing of borehole pressure, can ensure that the borehole wall formed does not collapses to greatest extent, significantly reduce the generation of drilling failure, greatly reduce lost-circulation, formation fracture, well kick, differential sticking, drill bit or BHA and meet the risk of card.

Description

The pressure control device of continuous cyclic drilling
Technical field
The present invention relates to the control system of a kind of drillng operation, the Stress control dress of a kind of continuous cyclic drilling Put.
Background technology
When drillng operations such as conventional well, horizontal well, underbalance wells, drilling operation course needs connect, unload single or thribble Operation, when stopping cleaner for high-pressure drilling fluid and recirculating cleaner for high-pressure drilling fluid, can produce pressure oscillation in well.Borehole pressure is unstable Fixed, it may occur however that lost-circulation, hole collapse, formation fracture, well kick, differential sticking equivalent risk, meanwhile, stop and re-establishing Pressures cycle, extends the drillng operation time, adds drillng operation cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide one and does not stop pressures cycle and connect, unload single operation, is conducive to contracting The stub boring well operations time, reduce the pressure control device of the continuous cyclic drilling of drilling cost.
In order to solve above-mentioned technical problem, the present invention includes body, is vertically formed through one for boring in the middle part of described body The through hole that bar passes, is also equipped with four flashboards in the through hole of described body, each described flashboard is respectively by two symmetrical configuration Half flashboard be spliced, and each described half flashboard respectively by one fluid cylinder drive;
Four described flashboards are respectively blind rams, slip flashboard, load-bearing flashboard and the pipe set gradually from top to bottom Flashboard, wherein blind rams, load-bearing flashboard and pipe ram be arranged in parallel, and described slip flashboard and described load-bearing flashboard are 90 ° Planche cross is crisscross arranged;
The closure of described blind rams is formed for fixing drilling rod connecting in the middle part of the upper end of body through-holes, described slip flashboard The holes for clamping of head, described tool joint upper end connects a upper drilling rod, and lower end connects lower drilling rod, described slip flashboard and body it Between be formed with space, described slip flashboard and load-bearing flashboard and be disposed proximate to and be formed with between the two gap, described load-bearing flashboard Middle part is formed with bearing hole, and described bearing hole top is formed with the load-bearing inclined-plane drilling rod for suspension strap tapering step of taper Joint and lower drilling rod, be formed with gap between described bearing hole and tool joint, described pipe ram blocks in body through-holes Lower end, is formed for the plugging hole that lower drilling rod passes in the middle part of described pipe ram, the company of sealing between described plugging hole and lower drilling rod Connect;
The upper circular tube line being connected together and lower pipeloop, described upper circular tube line and institute it is additionally provided with on described body The cavity stated between blind rams and slip flashboard is connected, described lower pipeloop and described load-bearing flashboard and pipe ram it Between cavity be connected.
Described the internal chute that is formed, two and half flashboards of described slip flashboard can move horizontally along chute.
One it is separately installed with for showing lock on the fluid cylinder driving described blind rams, slip flashboard and pipe ram The indication mechanism of situation closed by plate, is always separately installed with a Wedge-type locking for driving on two fluid cylinders of described load-bearing flashboard Become.
The invention has the beneficial effects as follows: for ensureing drillng operation safety, the present invention devises a set of continuous cyclic drilling pressure Force control device, provides moment of torsion that cleaner for high-pressure drilling fluid circulation canal, a clamping drilling rod bears, suspending weight drilling tool to hold for drillng operation The load being subject to, is connecing, is unloading in single operation process, do not stopping circulation of drilling fluid, eliminate cleaner for high-pressure drilling fluid and again open in well Begin circulation time pressure oscillation, keep borehole pressure stable, decrease well lost-circulation, formation fracture, well kick, differential sticking, Drill bit or BHA are met the risk of card, can effectively be prevented the generation of drilling failure.Meanwhile, pressures cycle is not stopped Connect, unload single operation, be conducive to shortening the drillng operation time, reduce drilling cost.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the pressure control device of continuous cyclic drilling of the present invention;
Fig. 2 is the plan structure schematic diagram of slip flashboard and load-bearing flashboard in the present invention;
Fig. 3 is slip flashboard and the operating diagram of load-bearing flashboard in the present invention;
Fig. 4 is the schematic top plan view of chute in the present invention;
Fig. 5 is the plan structure schematic diagram of load-bearing flashboard in the present invention;
Fig. 6 is the left view cutting structural representation of Fig. 5.
Detailed description of the invention
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings:
Seeing Fig. 1 to Fig. 6, the pressure control device of the continuous cyclic drilling of the present invention includes body, in the middle part of described body Vertically it is formed through a through hole passed for drilling rod, in the through hole of described body, is also equipped with four flashboards, each described lock Plate is spliced by half flashboard of two symmetrical configuration respectively, and each described half flashboard is driven by a fluid cylinder respectively.
Four described flashboards are respectively blind rams 1, slip flashboard 4, load-bearing flashboard 5 and the pipe set gradually from top to bottom Sub-flashboard 8, wherein blind rams 1, load-bearing flashboard 5 and pipe ram 8 be arranged in parallel, described slip flashboard 4 and described load-bearing lock Plate 5 is crisscross arranged in 90 ° of planche crosses.
Described blind rams 1 blocks the upper end in body through-holes, is formed for fixing drilling rod in the middle part of described slip flashboard 4 The holes for clamping of joint 15, described tool joint 15 upper end connects upper drilling rod 14, and lower end connects lower drilling rod, described slip flashboard Being formed with space between 4 and body, described slip flashboard 4 and load-bearing flashboard 5 are disposed proximate to and are formed with between the two gap, institute Stating and be formed with bearing hole in the middle part of load-bearing flashboard 5, described bearing hole top is formed with the load-bearing inclined-plane 301 of taper for suspension strap The tool joint 15 of tapering step and lower drilling rod, be formed with gap, described pipe lock between described bearing hole and tool joint 15 Plate 8 blocks the lower end in body through-holes, is formed for the plugging hole that lower drilling rod passes, described closure in the middle part of described pipe ram 8 It is tightly connected between hole and lower drilling rod.Moment of torsion when slip flashboard is for bearing, unload drilling tool spinner in four flashboards, load-bearing lock Plate is for bearing the suspended load of drilling tool.Blind rams and pipe ram form a pressure space closed after closing.Load-bearing Flashboard is provided with the load-bearing inclined-plane of taper, for tool joint 15 and the lower drilling rod of suspension strap tapering step;Or at load-bearing flashboard Right angle step can be set, for hang straight step tool joint 15 and lower drilling rod.Slip flashboard chamber is provided with flashboard and runs Track, uses 90 ° of crosses to interlock with load-bearing flashboard chamber, the laminating close with the lower plane of slip flashboard of the upper plane of load-bearing flashboard, Having small gap between two planes, it is ensured that in limited height space, the pressure control device of continuous cyclic drilling exists Bear, while moment of torsion when unloading drilling tool spinner, it is possible to bear the suspending weight load of drilling tool.
The upper circular tube line 16 being connected together and lower pipeloop, described upper circular tube line 16 it is additionally provided with on described body It is connected with the cavity between described blind rams 1 and slip flashboard 4, described lower pipeloop and described load-bearing flashboard 5 and pipe Cavity between sub-flashboard 8 is connected.Upper circular tube line 16 and lower pipeloop are all with the output device of a cleaner for high-pressure drilling fluid even Connect, in order in body through-holes, cleaner for high-pressure drilling fluid is injected in circulation.
Described the internal chute 201 that is formed, two and half flashboards of described slip flashboard 4 can move along chute 201 level Dynamic.Chute 201 can guide the moving direction of two and half flashboards of slip flashboard 4, it is also possible to is used for carrying slip flashboard 4, with Avoid slip flashboard 4 lower surface and load-bearing flashboard 5 upper surface.
One it is separately installed with for showing on the fluid cylinder driving described blind rams 1, slip flashboard 4 and pipe ram 8 Show that flashboard cuts out the indication mechanism 17 of situation, in the most each fluid cylinder, be respectively mounted the sensor of the keying situation for fluid cylinder, pass Whether sensor closes with the use of with display flashboard with corresponding indication mechanism 17, and indication mechanism 17 can commercially be buied, Its structure will herein be described in detail.A Wedge-type locking assembly it is separately installed with on two fluid cylinders drive described load-bearing flashboard 5 11, Wedge-type locking assembly 11 Main Function is to ensure that the structure after load-bearing flashboard 5 closedown is more stable firmly, Wedge-type Locking assembly 11 can commercially be buied, and its structure will herein be described in detail.
The rotating blowout preventer in the pressure control device of the continuous cyclic drilling of the present invention and portion mounted thereto (non-body in figure Existing) and bypass high pressure circulation of drilling fluid pipeline (not embodying in figure) realize continuous cycle operation together.
Unload drilling tool control flow: hydraulic control system hydraulic oil respectively enters the liquid in the pressure control device of continuous cyclic drilling Cylinder 6,9,12, promotes piston 7,10,13, closes load-bearing flashboard 5 (simultaneously closing off Wedge-type locking assembly 11), pipe ram 8, card Block brake plate 4 (two and half flashboards of slip flashboard 4 along chute 201 to central motion), indication mechanism 17 shows that flashboard cuts out feelings Condition.Now pipe ram 8 and be arranged on continuous cyclic drilling pressure control device top rotating blowout preventer formed one airtight Chamber.(it is clamped location by load-bearing flashboard 5), well head power slip device (slip flashboard 4) after tool joint 15 positions Drilling rod 14 in clamping, at this moment inject cleaner for high-pressure drilling fluid (owing to being formed with between slip flashboard 4 and load-bearing flashboard 5 in closed chamber It is also formed with gap and space between gap, and both and drilling rod or body, therefore cleaner for high-pressure drilling fluid can be full of whole airtight Chamber), when drilling rod (upper drilling rod 14, tool joint 15 and lower drilling rod) external and internal pressure is equal, utilize Power Tong shackle and outward winding on Drilling rod 14, slip flashboard 4 bears moment of torsion during spinner, the load-bearing inclined-plane 301 of load-bearing flashboard 5 and the tapered slope of tool joint 15 Clamping, bears the weight load of drilling tool, then with tripping assembly by force, top rod 14 is promoted to blind rams 1 upper end, High pressure is bored by the bypass (i.e. upper circular tube line 16 and lower pipeloop) at this moment utilizing the pressure control device of continuous cyclic drilling Well liquid recycle stream enters the central passage of tool joint 15, and hydraulic control system hydraulic oil enters fluid cylinder 2 simultaneously, promotes piston 3, closes complete Envelope flashboard 1, is divided into upper and lower Liang Ge airtight chamber by the annular seal space of rotating blowout preventer Yu pipe ram.Top seal chamber is by rotating Preventer bypass pressure release, drilling rod 14 in proposition, this completes the operation unloading drilling tool.
Connect the control flow of drilling tool: hydraulic control system hydraulic oil respectively enters in the pressure control device of continuous cyclic drilling Fluid cylinder 2,6,9,12, promotes piston 3,7,10,13 closedown blind rams 1, load-bearing flashboard 5 (to simultaneously close off Wedge-type locking assembly 11), pipe ram 8, slip flashboard 4, indication mechanism 17 show flashboard close situation.The load-bearing inclined-plane 301 of load-bearing flashboard 5 and brill Drilling tool is hung in the tapered slope clamping of knock-off joint 15, bears the weight load of drilling tool, and two and half flashboards of slip flashboard 4 are along cunning Groove 201 closes clamping tool joint 15.Steadily transfer the upper drilling rod 14 of the pressure control device of continuous cyclic drilling, treat drilling rod 14 transfer to time above blind rams 1, and above rotating blowout preventer and blind rams 1, cavity circulation injects cleaner for high-pressure drilling fluid.When When upper and lower two cavity pressures of blind rams 1 are equal, open blind rams 1, after blind rams 1 fully opens, running and pulling device by force Under put drilling rod 14 make-up, power set screw drilling rod 14 simultaneously, and link closely;After upper drilling rod 14 is tightened with tool joint 15, Open bypass (i.e. upper circular tube line 16 and the lower pipeloop) release of the pressure control device of continuous cyclic drilling, open afterwards The pipe ram 8 of the pressure control device bottom of continuous cyclic drilling, power set unclamp drilling rod 14, complete to connect the behaviour of drilling tool Make.
The lost-circulation when present invention greatly reduces drilling well, formation fracture, well kick, differential sticking equivalent risk, save In order to eliminate the rig downtime of the landwaste of bottomhole assembly before connecing column.The present invention is safe and reliable, novel structure, operation side Just, improve working performance.
In sum, present disclosure is not limited in the above embodiments, and those skilled in the art can be Other embodiment proposed within technological guidance's thought of the present invention, but these embodiments be included in the scope of the present invention it In.

Claims (3)

1. the pressure control device of a continuous cyclic drilling, it is characterised in that: include body, vertically run through in the middle part of described body Be formed with a through hole passed for drilling rod, in the through hole of described body, be also equipped with four flashboards, each described flashboard respectively by Half flashboard of two symmetrical configuration is spliced, and each described half flashboard is driven by a fluid cylinder respectively;
Four described flashboards be respectively set gradually from top to bottom blind rams (1), slip flashboard (4), load-bearing flashboard (5) and Pipe ram (8), wherein blind rams (1), load-bearing flashboard (5) and pipe ram (8) be arranged in parallel, described slip flashboard (4) It is crisscross arranged in 90 ° of planche crosses with described load-bearing flashboard (5);
Described blind rams (1) blocks in the upper end of body through-holes, and described slip flashboard (4) middle part is formed for fixing drilling rod The holes for clamping of joint (15), described tool joint (15) upper end connects upper drilling rod (14), and lower end connects lower drilling rod, described card It is formed with space, described slip flashboard (4) and load-bearing flashboard (5) between block brake plate (4) and body to be disposed proximate to and between the two Being formed with gap, described load-bearing flashboard (5) middle part is formed with bearing hole, and described bearing hole top is formed with the load-bearing inclined-plane of taper (301) for tool joint (15) and the lower drilling rod of suspension strap tapering step, between described bearing hole and tool joint (15) Being formed with gap, described pipe ram (8) blocks in the lower end of body through-holes, and described pipe ram (8) middle part is formed for down The plugging hole that drilling rod passes, is tightly connected between described plugging hole and lower drilling rod;
The upper circular tube line (16) and lower pipeloop being connected together, described upper circular tube line (16) it is additionally provided with on described body It is connected with the cavity between described blind rams (1) and slip flashboard (4), described lower pipeloop and described load-bearing flashboard (5) cavity and between pipe ram (8) is connected.
2. according to the pressure control device of the continuous cyclic drilling described in claim 1, it is characterised in that: described internal formation Having chute (201), two and half flashboards of described slip flashboard (4) can move horizontally along chute (201).
3. according to the pressure control device of the continuous cyclic drilling according to any one of claim 1 or 2, it is characterised in that: use It is separately installed with one for showing lock on the fluid cylinder driving described blind rams (1), slip flashboard (4) and pipe ram (8) The indication mechanism (17) of situation closed by plate, is used for driving on two fluid cylinders of described load-bearing flashboard (5) and is separately installed with a voussoir Formula locking assembly (11).
CN201610856284.3A 2016-09-28 2016-09-28 The pressure control device of continuous cyclic drilling Pending CN106285528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610856284.3A CN106285528A (en) 2016-09-28 2016-09-28 The pressure control device of continuous cyclic drilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610856284.3A CN106285528A (en) 2016-09-28 2016-09-28 The pressure control device of continuous cyclic drilling

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Publication Number Publication Date
CN106285528A true CN106285528A (en) 2017-01-04

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201620781U (en) * 2010-03-03 2010-11-03 中国石油天然气集团公司 Drilling fluid shunt control manifold of a continuous circulation drilling system
CN101942977A (en) * 2010-09-01 2011-01-12 中国石油天然气集团公司 Continuous cyclic drilling device
CN102777145A (en) * 2012-08-16 2012-11-14 中国石油大学(北京) Electric control fluid drive coiled tubing downhole retractor
US20150176347A1 (en) * 2013-12-19 2015-06-25 Weatherford/Lamb, Inc. Heave compensation system for assembling a drill string
CA2881891A1 (en) * 2014-02-21 2015-08-21 Weatherford/Lamb, Inc. Continuous flow system for drilling oil and gas wells
CN206091912U (en) * 2016-09-28 2017-04-12 中国石油集团渤海钻探工程有限公司 Pressure control device of continuous cycle well drilling

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201620781U (en) * 2010-03-03 2010-11-03 中国石油天然气集团公司 Drilling fluid shunt control manifold of a continuous circulation drilling system
CN101942977A (en) * 2010-09-01 2011-01-12 中国石油天然气集团公司 Continuous cyclic drilling device
CN102777145A (en) * 2012-08-16 2012-11-14 中国石油大学(北京) Electric control fluid drive coiled tubing downhole retractor
US20150176347A1 (en) * 2013-12-19 2015-06-25 Weatherford/Lamb, Inc. Heave compensation system for assembling a drill string
CA2881891A1 (en) * 2014-02-21 2015-08-21 Weatherford/Lamb, Inc. Continuous flow system for drilling oil and gas wells
CN206091912U (en) * 2016-09-28 2017-04-12 中国石油集团渤海钻探工程有限公司 Pressure control device of continuous cycle well drilling

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Application publication date: 20170104