A kind of shale gas extended reach well drilling well down-hole equipment separating toolTechnical field:
The present invention relates to shale gas drilling technology field, in particular to a kind of shale gas extended reach well drilling well down-hole equipmentSeparating tool.
Background technique:
With the depression of global oil price, oil-gas mining cost is constantly squeezed, and shale gas exploitation cost equally carries out great dynamicsCompression shorten drilling period to obtain some conduct on shale gas, improve drilling well timeliness with regard to particularly significant.PrestigeRemote shale gas well is large number of, on the one hand needs adjustment casing programme in time, reduces the overlapping investment of huge fund；On the other handDue to Weiyuan shale gas complex geologic conditions, cover pressure and deposit, horizontal well and extended reach well drilling well difficulty are continuously increased, drilling well moreLow efficiency, down-hole accident is multiple, and import rotary steerable tool has seriously affected company's shale gas because serious bit freezing is embedded in wellThe process of exploitation.Once occur downhole drill accident, short processing time then one month, it is long then up to 1 year or even longer, expenseAt least hundreds of thousands member, more then millions of member losses are huge.Lock of tool drilling how is released rapidly, reduces drilling risk and causality lossIt is the task of top priority of current drilling well work.
All there is limitation in structure when existing reverse buckling type, shear-type and sleeve type safety joint drilling use and lacksFall into, main cause: 1, the safety joint of reverse buckling type sawtooth pattern is typical reverse buckling type safety joint, and this connector is to prevent midwayVoluntarily back-off disengages, and the cooperation of screw thread needs certain preload, it is necessary to be screwed on ground with pipe wrench, which results in undergroundsIt is larger to disengage difficulty, and is easy to happen the phenomenon that disengaging from other threaded connection places, poor reliability；2, shear-type safety jointBe tubing string meet block when, promoted tubing string, by connector pin or copper sheathing cut, to realize disengagement, the tool is when in useThe load of connector or less part need to be calculated, and is easy to be influenced by hole condition and midway is caused to fall off；3, sleeve type safety joint is worked asWhen there is tubing string inside and outside differential pressure imbalance in midway or drilling process, pump of easily spraining causes pin to be cut, and it is direct lower tool occurFall well.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of shale gas extended reach well drilling well down-hole equipment separating tool,The arrangement achieves with two-stage separating mechanism, stuck point top drilling tool can be poured out from stuck point rapidly, use reliability is high,Be not in that midway disengages in drilling process, reduce drilling risk, the torque of top drilling tool can be transmitted in drilling, is applied toThe drill bit of lower part, tool application method is simple, easy to operate, shortens the time of accident treatment, to improve drilling well timeliness, saves and boresWell cost.Overcome the deficiency for the case where existing separating tool reliability is low, and Yi Fasheng is difficult to safe separating and midway disengagement.
The technical solution used in the present invention is: a kind of shale gas extended reach well drilling well down-hole equipment separating tool, packetInclude second level top connection；Second level top connection lower end is multiple elastic claws, and multiple elastic claw is limited insertion after set struts and is fixed onIn second level lower contact inner wall limiting slot, limit sleeve is cut off by second level to be fixed on second level lower contact inner wall, and limit set upper side is setIn respect of the ball seat to match with second level steel ball, second level lower contact upper end dental inlay matches with the dental inlay in second level top connection to be connect,Second level lower contact lower end connects top connection, and top connection lower end connects level-one lower contact, top connection lower end by left-handed trapezoidal threadDental inlay matches with torsion pass spline set upper side dental inlay to be connect, and torsion pass spline housing is cut off by level-one is connected to level-one lower contact inner wallOn, the design of torsion pass spline set upper side has the ball seat to match with level-one steel ball, and torsion pass spline housing outer wall passes through spline and level-oneLower contact internal spline matches connection.
It is sealed between torsion pass spline housing and level-one lower contact by O-ring seal I.
It is sealed between top connection and level-one lower contact by O-ring seal II.
It is sealed by O-ring seal III between limit sleeve and second level lower contact, between limit sleeve and second level top connection.
Level-one is cut off to be fixed in level-one lower contact by A type circlip for hole and baffle, and baffle is fixed under level-oneIn the circlip groove of connector.
The beneficial effects of the present invention are: the present invention is realized with two-stage separating mechanism, will can block from stuck point rapidlyPoint top drilling tool is poured out, and use reliability is high, is not in that midway disengages in drilling process, is reduced drilling risk, can boreInto when transmit the torque of top drilling tool, be applied to the drill bit of lower part, tool application method is simple, easy to operate, shortens accident treatmentTime save drilling cost to improve drilling well timeliness.
Detailed description of the invention:
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the A-A of Fig. 1 to sectional view.
Fig. 3 is the B-B direction sectional view of Fig. 1.
Fig. 4 is the C-C of Fig. 1 to sectional view.
Fig. 5 is the structural schematic diagram cut off.
Specific embodiment:
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of shale gas extended reach well drilling well down-hole equipment separating tool, including twoGrade top connection 14；14 lower end of second level top connection is multiple elastic claws, and multiple elastic claw is limited to be embedded in after set 13 struts and fixIn 10 inner wall limiting slot of second level level-one lower contact, play the role of bearing drilling tool pulling force.Limit sleeve 13 cuts off 12 by second levelIt is fixed on 10 inner wall of second level level-one lower contact, the design of 13 upper end of limit sleeve has the ball seat to match with second level steel ball 15, second level10 upper end dental inlay of level-one lower contact matches with the dental inlay in second level top connection 14 to be connect, the connection of 10 lower end of second level level-one lower contactTop connection 9,9 lower end of top connection connect level-one lower contact 1,9 lower end dental inlay of top connection and torsion pass spline by left-handed trapezoidal threadIt covers 2 upper end dental inlays to match connection, torsion pass spline housing 2 cuts off 6 by level-one and is connected on 1 inner wall of level-one lower contact, torsion pass flowerKey, which covers the design of 2 upper ends, the ball seat to match with level-one steel ball 7, and 2 outer wall of torsion pass spline housing passes through spline and level-one lower contact 1Internal spline matches connection.
It is sealed between torsion pass spline housing 2 and level-one lower contact 1 by O-ring seal I 3.
It is sealed between top connection 9 and level-one lower contact 1 by O-ring seal II 8.
Pass through between limit sleeve 13 and second level level-one lower contact 10, between limit sleeve 13 and second level top connection 14 O-shaped closeSeal III 11 seals.
It is fixed in level-one lower contact 1, is kept off by A type circlip for hole 4 and baffle 5 as shown in figure 5, level-one cuts off 6Piece 5 is fixed in the circlip groove of level-one lower contact 1.
The present invention is placed in the bottom section of entire drilling tool when due to using, and is constantly in drilling shape in the construction processState, thus be subjected to high pump pressure, high tensile, high antitorque, high resistance to compression (will above mention drilling tool energetically, be likely to occur in lower brill when hanging tagUnexpected blocked portion phenomenon) etc. various complicated applied forces, so selection principle in terms of tool selection are as follows: main body spare and accessory parts are all made of high-strengthStructural alloy steel is spent, the whole synthesis mechanical performance of tool is improved by heat treatment process such as quenched, nitridings, meets special workThe construction demand of condition；Seal assembly is all made of fluorubber resistant to high temperature and is sealed.
In normal drilling operability, the present invention is connected to the upper end of the easy card portion of drilling tool, passes through top connection 9, torsion pass flowerKey set 2 carries out transmitting torque with the dental inlay device of level-one lower contact 1 to each other, passes through top connection 9 and the trapezoidal spiral shell of level-one lower contact 1Pulling force and pressure are born in line connection.When meeting lock of tool drilling, stop brill, termination of pumping, dismantles top drive or kelly bar puts into one into drilling toolGrade steel ball 7, turn on pump, which builds the pressure, makes level-one steel ball 7 to enter 2 upper end of torsion pass spline housing, due to the rising of pump pressure, pushes torsion pass spline housing 2It cuts level-one and cuts off 6, be detached from 2 upper end dental inlay of torsion pass spline housing and 9 lower end dental inlay of top connection, termination of pumping after being pumped decline, soAfter rotate forward drilling tool, make lower contact right-hand thread junction separate, promoted take out drilling tool, then carry out next step circulation, set milling, salvageWork.Stayed in after separating underground tool part can be connect with the salvaging of subsequent tripping in, packaged milling tool it is subsequent continue vertical circulation, it is completeAt subsequent job.If tool cannot separate, second level steel ball 15 can be put into and carry out the second-order separation, second level steel ball 15 enter limit13 upper end ball seats are covered, pushes limit sleeve 13 to cut second level and cuts off 12,13 downlink of limit sleeve is released to the multiple of second level top connection 14Multiple elastic claws of the locking of elastic claw, second level top connection 14 are shunk, and second level top connection 14 is separated with second level level-one lower contact 10,The present invention has two-stage separating mechanism, separates high reliablity.
It is understood that being merely to illustrate the present invention above with respect to specific descriptions of the invention and being not limited to thisTechnical solution described in inventive embodiments, those skilled in the art should understand that, still the present invention can be carried outModification or equivalent replacement, to reach identical technical effect；As long as meet use needs, all protection scope of the present invention itIt is interior.