A kind of half way rotation borehole trace control toolTechnical field
The invention belongs to petroleum gas field drilling technology fields, rotate well track control more particularly, to a kind of half wayTool processed.
Background technique
As oil field development enters the exploitation needs of the unconventional petroleum resources such as middle and later periods and shale gas, long horizontal sections waterHorizontal well, cluster well, extended reach well, five sections of directional wells processed using more and more extensive, because frictional resistance causes greatly during drilling wellThe problem of it is especially prominent, seriously constrain extension and the directional drilling of horizontal section length speed promoted.Conventional steerable drilling byLead to backing pressure greatly in mill resistance, bit pressure cannot effectively be transferred to drill bit, the problems such as tool-face unstability, rate of penetration is slow often occur.Rotary steerable drilling can solve the problems, such as mill resistance, but due at high cost, and require drilling condition strictly, using by a certain extentLimitation.Quick sliding steerable drilling using clockwise with interact rotary drill column counterclockwise, make drill string in certain torque or cornerInterior lasting positive and negative rotation, the technology for reducing slide drilling frictional resistance makes bit pressure smoothly pass to drill bit, stabilizing tool face, but constructsDrive cooperation need to be pushed up, drill string, which rocks, sufficiently to stir the landwaste of cutting bed, help less, to construct also by well depth to rock is takenMill resistance cannot be greatly lowered in limitation.
Summary of the invention
The object of the present invention is to provide a kind of half ways to rotate borehole trace control tool, real by torque " from-conjunction " modeBrill is sent in existing upper drilling string rotation, and mud motor carries out the function of sliding directional drilling simultaneously, so that it is fixed that sliding is greatly reducedTo drill string frictional resistance when creeping into, alleviate backing pressure, the TRAJECTORY CONTROL ability of wellbore is improved in stabilizing tool face, to solve as Weiyuan is longThe difficult problem low with rate of penetration of orientation section orientation of horizontal segment horizontal well.
The purpose of the present invention is what is realized by following technical proposals:
Half way of the invention rotates borehole trace control tool, it is characterised in that including shell, is arranged in this lower part of the housingAnd the outer cylinder being fixedly connected with the shell by support sleeve, setting are arranged in the intracorporal mechanical clutch pipe nipple of the shell in instituteThe automatically controlled pipe nipple in outer cylinder is stated, the automatically controlled pipe nipple includes electronic module, the direct current generator being connected with this electronic module, withThe telescoping mechanism that the output end of this direct current generator is connected,
The mechanical clutch pipe nipple includes top connection, is arranged below this top connection and passes through screw thread with the top connectionThe upper half clutch of connection, the center-pole that bottom is threadedly coupled with the telescoping mechanism, under being connected with this center-pole topUpper pressing cap, bearing assembly and seal combination between the top connection and the shell is arranged in half-clutch device, is arranged describedThe reset spring of the support sleeve Yu the center-pole top shaft shoulder gap is arranged in one group of piston pawl on support sleeve,
The lower semi-clutch is equipped with external splines, and the inner walls are equipped with internal spline, this internal spline and instituteThe external splines stated matches,
The outer cylinder bottom end is connected with lower contact, and the electronic module is connected with ground control centre.
The electronic module be connected with battery compartment, the electronic module and battery compartment be fixed on by support base it is describedOuter cylinder in.
Overcurrent ring is equipped at the battery compartment.
The bearing assembly includes sliding bearing and thrust roller bearing.
The center-pole is the variable diameter bar that upper diameter is greater than lower diameter.
Advantages of the present invention:
Half way of the invention rotates borehole trace control tool, easy to use, cost is relatively low, it is reliable and effective to can be realizedHole trajectory control, upper part tubing string is fully rotating, and it is big that drop wears away resistance amplitude, while wellbore cleaning capacity can be improved；Using notIt is limited by well depth and well type, is suitable for extended reach well, long horizontal sections horizontal well, Tail Pipe For Complicated Deep Wells and Slim Hole；With it is quickSlide drilling, which is compared, has apparent technical advantage, has preferable economic serviceability compared with rotary steering drilling tool.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is torque clutch schematic diagram of the present invention.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing.
As shown in Figure 1, 2, half way of the invention rotates borehole trace control tool, it is characterised in that including shell 1-8, ifIt sets in the lower part this shell 1-8 and the outer cylinder 2-1 that is fixedly connected with the shell 1-8 by support sleeve 1-11, is arranged in the shellThe automatically controlled pipe nipple in the outer cylinder 2-1 is arranged in mechanical clutch pipe nipple in body 1-8, and the automatically controlled pipe nipple includes electronic dieBlock 2-4, the direct current generator 2-3 being connected with this electronic module 2-4, what is be connected with the output end of this direct current generator 2-3 is flexibleMechanism 2-2,
The mechanical clutch pipe nipple includes top connection 1-1, be arranged below this top connection 1-1 and with the top connection 1-The 1 upper half clutch 1-6 being connected through a screw thread, the center-pole 1-12 that bottom is threadedly coupled with the telescoping mechanism 2-2, and in thisThe upper pressure between the top connection 1-1 and the shell 1-8 is arranged in the lower semi-clutch 1-7 that the top core bar 1-12 is connectedOne group of piston pawl 1-10 on the support sleeve 1-11 is arranged in cap 1-2, bearing assembly and seal combination 1-5, is arranged describedThe reset spring 1-9 of support sleeve 1-11 and the top center-pole 1-12 shaft shoulder gap,
The lower semi-clutch 1-7 is equipped with external splines, and the shell 1-8 inner wall is equipped with internal spline, flower in thisKey is matched with the external splines,
The bottom end outer cylinder 2-1 is connected with lower contact 2-8, and the electronic module 2-4 is connected with ground control centreIt connects.
The electronic module 2-4 is connected with battery compartment 2-6, and the electronic module 2-4 and battery compartment 2-6 pass through supportSeat 2-5 is fixed in the outer cylinder 2-1.
Overcurrent ring 2-7 is equipped at the battery compartment 2-6.
The bearing assembly includes sliding bearing 1-3 and thrust roller bearing 1-4.
The center-pole 1-12 is the variable diameter bar that upper diameter is greater than lower diameter.
Half way rotation borehole trace control tool of the invention is made of mechanical clutch pipe nipple and automatically controlled pipe nipple, such as Fig. 1 instituteShow, mechanical clutch pipe nipple is upper, and automatically controlled pipe nipple is under.The function of automatically controlled pipe nipple is sent using the ground similar to rotary steeringThe mode of signal instruction shunts pressure release by the pneumatic by-passing valve regularity being mounted on standpipe, gives underground electronic control moduleInstruction is sent, electronic module 2-4 receives the clutch for driving executing agency to realize torque after instruction.Mechanical clutch pipe nipple function is to connectAfter receiving electronic control unit instruction, clutch pipe nipple realizes two kinds of work shapes of " disengagement " and " locking " of drilling tool torque by mechanical mechanismState.
According to drilling condition, when half way electric rotating control guide drilling tool needs to act, ground issues one group of instruction, refers toThe electronic module 2-4 in automatically controlled pipe nipple is reached under order, driving direct current generator 2-3 drive is flexible after electronic module 2-4 receives instructionIn in the locking function that mechanism 2-2 realization is stretched after locking action and movement, telescoping mechanism 2-2 and mechanical clutch pipe nippleCore bar 1-12 is connected through a screw thread, and then realizes the push pull maneuver of center-pole 1-12.Electronic control unit be arranged electricity lower than 20% withAfterwards, clutch pressure is closed, is not reoperated, prevent situation about not closing after leaving.
When needing transmitting upper drilling string torque downwards, automatically controlled pipe nipple pushes up center-pole 1-12, half-clutch under driveDevice 1-7 is moved upwards, and the transmitting for realizing torque is engaged with upper half clutch 1-6, meanwhile, 3 work being arranged on support sleeve 1-11Plug pawl 1-10 is recovered in support sleeve 1-11 by center-pole 1-12 conical surface reducing district, such as attached drawing 2 (b), upper half clutch 1-6 andTop connection 1-1 is connected through a screw thread, and the torque of upper drilling string is transferred to upper half clutch 1-6 by top connection 1-1, then is transferred toLower semi-clutch 1-7.External splines is set on lower semi-clutch 1-7, and shell 1-8 inner wall is arranged internal spline, is matched by interior external splinesIt closes, can transfer a torque to lower contact 2-8 by lower semi-clutch 1-7 transmitting torque to shell 1-8, shell 1-8, so far completeThe transmitting of torque.
When not needing to transmit upper drilling string torque downwards, automatically controlled pipe nipple pulls downward on center-pole 1-12, drive lower half fromClutch 1-7 is moved downward, and the disconnection for realizing torque, while the piston being arranged on support sleeve 1-11 are detached from upper half clutch 1-6Pawl 1-10 is extended radially out by center-pole 1-12 conical surface reducing district and is supported on the borehole wall, such as attached drawing 2 (a), upper half clutch 1-6'sTorque is maintained at top by bearing combination, does not transmit to lower semi-clutch 1-7.Meanwhile thrust roller bearing 1-4 can also be downwardTransmit bit pressure.Upper drilling string rotation can be achieved and send brill, piston pawl 1-10 stretching is supported on the borehole wall, balances mud motorReaction torque, mud motor carry out the function of sliding directional drilling simultaneously.If you need to adjust tool-face during directional drilling, thenGround sends instruction starting clutch and closes, and realizes torque transmitting, ground, which rotates forward tubing string, at this time can put tool-face.Tool-face is setAfterwards, clutch leaves, and can proceed with the rotation of top drilling tool, while helicoid hydraulic motor directional drilling.
Embodiment
Flatly 8 1/2 " wellbore carries out the conventional slide directional drilling of horizontal segment using mud motor combination, by half wayIt rotates in the drill string at a certain distance from borehole trace control tool is mounted on mud motor rear end.Ground is logical to issue one group oneFix time interval by-passing valve shunt pressure release signal, under reach half way rotation borehole trace control tool, the downhole electric control of toolDriving direct current generator 2-3 is acted after pressure sensor built in unit receives pressure change signal, drives center-pole 1-12 move up.Upper half clutch 1-6, lower semi-clutch 1-7 leave, and realize and do not turn under turning on tubing string.Turntable can certain revolving speed at this timeNormal rotation, driller's bradawl force feed bore, and whether viewing tool face is stable.Half way rotational trajectory is proved if tool-face is relatively stableControl tool is in leave state, and bit pressure can be improved and carry out conventional slide guide digging.After orientation section has been beaten, ground is retransmited separatelyOne group of start-stop pump signal, the pressure sensor built in downhole electric control unit drive direct current generator 2- after receiving pressure change signal3 are acted, and center-pole 1-12 is driven to move down.Upper half clutch 1-6, lower semi-clutch 1-7 locking realize tubing string up and down togetherTurn, compound drilling can be carried out.Instruction real-time perfoming switching, half way rotation can be sent by ground by sliding directional drilling and compound drillingTurn the working condition of TRAJECTORY CONTROL tool whether can stablizing by tool-face when the variation of turntable torque and turntable rotation to carry outJudgement.If when directional drilling, tool-face deflects, can ground send instructions and close half-clutch device, tool-face can be put from well head,It sets after tool-face again by throw-out-of clutch, continues top drilling tool rotary and transfer lower drilling tool sliding Directional Drilling while boringInto.
Half way of the invention rotates borehole trace control tool, easy to use, cost is relatively low, it is reliable and effective to can be realizedHole trajectory control, upper part tubing string is fully rotating, and it is big that drop wears away resistance amplitude, while wellbore cleaning capacity can be improved；Using notIt is limited by well depth and well type, is suitable for extended reach well, long horizontal sections horizontal well, Tail Pipe For Complicated Deep Wells and Slim Hole；With it is quickSlide drilling, which is compared, has apparent technical advantage, has preferable economic serviceability compared with rotary steering drilling tool.