CN103437716A - Centering and sealing mechanism suitable for casing pipe driving head - Google Patents
Centering and sealing mechanism suitable for casing pipe driving head Download PDFInfo
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- CN103437716A CN103437716A CN2013103871298A CN201310387129A CN103437716A CN 103437716 A CN103437716 A CN 103437716A CN 2013103871298 A CN2013103871298 A CN 2013103871298A CN 201310387129 A CN201310387129 A CN 201310387129A CN 103437716 A CN103437716 A CN 103437716A
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Abstract
The invention discloses a centering and sealing mechanism suitable for a casing pipe driving head. The centering and sealing mechanism comprises a lower connector, a sealing ring and an inner wall centering device, wherein the lower connector is connected with the inner wall centering device. The lower connector is provided with a connector lifting shoulder integrated with the lower connector. The sealing ring used for sealing drilling fluid is arranged between the connector lifting shoulder and the inner wall centering device, and a centering ridge is arranged on the outer wall of the inner wall centering device. The centering and sealing mechanism has the guiding effect when entering a casing pipe and the centering effect on a drilling assembly in the drilling process, can improve the setting ability of the casing pipe inside a complex well and the safety of the set casing pipe, and lowers the operating risk.
Description
Technical field
The present invention relates to a kind of righting sealing mechanism that is applicable to the sleeve pipe driving head, for using sleeve pipe, implement the drilling well of petroleum gas, belong to the design and manufacturing technology field of drilling equipment.
Background technology
In conventional oil gas drilling process, stratum geology characteristic due to various places, often there will be hole shrinkage, cave-in, the down hole problems such as the keyway that Drilling causes and leakage, in this case, when after drilling well completes, the well cementation of enforcement setting of casing is rotated, card will be hampered in some wells, the even sleeve pipe had can not be lowered into the problems such as desired depth, when these situations occur, will cause construction can not reach the requirement of engineering design, the security incident that also there will be the setting of casing process had, cause operating risk to increase, the consequences such as cost rising and construction period prolongation, the Casing Drilling Technique of prior art research, due to sleeve pipe along with drilling tool is lowered to stratum, therefore, put and put sleeve pipe on sleeve pipe is hampered Shi Jike, can connect again the circulating system is circulated and is rotated, contribute to solve the setting of casing problem that is hampered, improve the setting ability of sleeve pipe in bad hole, increase the safety that is lowered to sleeve pipe, reduce operating risk, and effectively avoided drillng operation cased process more later, therefore can effectively address the above problem, simultaneously in going down process, the instrument of sleeve pipe driving mechanism front end can be lowered to by guiding sleeve, can also play the effect of repairing the borehole wall and reaming, make the borehole wall more regular, thereby contribute to improve cementing quality, save time and cost.
Existing cased mode is: on rig floor by elevator, after a lower complete sleeve pipe, casing clamp under elevator, at this moment with suspension ring by an other sleeve pipe in elevator, screw casing threads, unclamp elevator, then setting of casing, by that analogy, the lower layer to design gets final product.
The down hole problems such as the keyway that current mode causes as hole shrinkage, cave-in, Drilling in work progress and leakage, sleeve pipe can not continue to transfer.Existing solution is: (1) is carried sleeve pipe on the whole or is transferred with suspension ring for several times.(2) as still continued to transfer sleeve pipe, can connect the circulating system, circulating fluid, rinse the borehole wall, then upper, carry or transfer sleeve pipe until well is dredged.(3) as still continued to transfer sleeve pipe through above two processes, just the sleeve pipe of G.I.H all need be taken out, then with drilling rod, connect drill bit and carry out wealthy eye and borehole wall reparation, well is all removed drilling rod after dredging, and is carrying out casing job.Above process will cause the consequences such as operating risk increase, cost rising and construction period prolongation.At present domestic is substantially all to adopt said method to implement cased construction, have also in the sleeve pipe lower end with casing pipe drill shoe, still, existing casing pipe drill shoe function singleness can not meet that ring drilling fluid, guiding sleeve enter in well, the function of the reparation borehole wall simultaneously.
In order to address the above problem, China Patent No. " CN200320127812.X " discloses the hydraulic casing drive head for casing drilling under a kind of rotary drilling mode, and open day is on 02 23rd, 2005.In addition, China Patent No. " CN200320127963.5 " discloses the mechanical casing drive head for casing drilling under a kind of rotary drilling mode, and open day is on 02 23rd, 2005.But also there is following deficiency in this type of technology: one, the CN200320127812.X patent must be passed through the downward slurry conveyed of tube chamber of main shaft central authorities as promoting descent of piston power by the unlatching slush pump in working order, whole device does not have locking mechanism, this method makes the working condition of driving head be subject to the immediate constraint of slush pump, if slush pump pump pressure shakiness easily causes operational failure, need well pump pressure to be controlled.Two, the CN200320127812.X patent is the method that adopts back-moving spring that slips tooth and sleeve pipe are broken away from, and there is back-moving spring fatigue in this method, and incomplete problem causes during strength decreased resetting; The inclined-plane contact area of piston and slips also may be because overhigh pumping pressure causes inter-adhesive and situation that can't separate.Three, in the CN200320127963.5 patent, the expansion of slips and the control that resets are to control by the big nut drive unit, although the method can lock control, complex operation to slips; Many ramp structures of slide key do not have guiding device, cause slips to exist in expansion and reseting procedure and jam or the not firm phenomenon of locking can't occur between two parties.
Summary of the invention
The object of the invention is to overcome the problems referred to above that prior art exists, a kind of righting sealing mechanism that is applicable to the sleeve pipe driving head is provided.Adopt the present invention to play the effect of guiding when entering sleeve pipe, when creeping into, also can play the technique effect of righting to drilling assembly, can improve the setting ability of sleeve pipe in bad hole, increase the safety that is lowered to sleeve pipe, reduce operating risk.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of righting sealing mechanism that is applicable to the sleeve pipe driving head, it is characterized in that: comprise lower contact, sealing ring and inwall centralizer, described lower contact is connected with the inwall centralizer, be provided with the joint half the circumference of the sleeve where it joins the shoulder that is one with lower contact in lower contact, be provided for sealing the sealing ring of drilling fluid between joint half the circumference of the sleeve where it joins the shoulder and inwall centralizer, on the outer wall of inwall centralizer, be provided with centering edge.
Be provided with seal groove on described sealing ring, the notch of seal groove arranges downwards.
Described lower contact is connected with the guiding retaining mechanism, the guiding retaining mechanism is connected with the variable buckle joint, described guiding retaining mechanism comprises the axis that is connected with lower contact and is socketed in the slips on axis, and axis coordinates with sleeve pipe by slips and is used for put-on and delegated and revoling tube.
Described axis comprises from top to bottom positioning section and drives section, is fixedly installed positioning key on positioning section, drives on section and is fixedly installed the driving key, drive section surface to be the conical surface, and upper end diameter is less than lower end diameter.
Described slips one end is provided with the latch locked with internal surface of sleeve pipe, the other end is provided with and coordinates the spacing keyway that relatively rotates amplitude for controlling axis and slips with positioning key, on slips, also be provided with and the slips keyway that drives key to coordinate, axis is by driving key and slips keyway to drive the slips rotation for driving sleeve rotating; When slips is locked on sleeve pipe, slips is positioned at and drives on section.
The cylindrical structure of described slips, a columnar structured end arranges latch, and the other end is provided with the slips half the circumference of the sleeve where it joins the shoulder, and spacing keyway is arranged on the end face of slips half the circumference of the sleeve where it joins the shoulder.
Also be provided with the gap for slips lower end external diameter is opened on described slips.
Described slips keyway and gap be equidistant four roads that respectively are set on the circumference of slips.
Described positioning key is one, and driving key is four, and one of them drives key and positioning key on same straight line.
Be respectively arranged with positioning spline on described axis and drive keyway, positioning key is arranged in positioning spline, drives key to be arranged on and drives in keyway.
Described variable buckle upper end of joint connects drilling tool, and lower end connects axis.
Employing the invention has the advantages that:
While one, occurring that in well the down hole problem setting of casings such as undergauge, cave-in, keyway and leakage are hampered, but the sleeve pipe driving head that utilizes the present invention to form is the put-on and delegated sleeve pipe both, the circulating system be can connect again and mud circulation and revoling tube carried out, contribute to solve the setting of casing problem that is hampered, improve the setting ability of sleeve pipe in bad hole, increase the safety that is lowered to sleeve pipe, reduce operating risk.
Two, in the present invention, under the effect of the latch of guiding retaining mechanism on slips, after inserting sleeve pipe, can be attached on casing wall, can effectively reduce the mutual swing between sleeve pipe and the present invention, and can guarantee in the whole process connected with sleeve pipe, the latch of slips can fit tightly with internal surface of sleeve pipe, reaches the sleeve pipe accident that drops that prevents.
Three, in the present invention, be provided with sealing ring between joint half the circumference of the sleeve where it joins the shoulder and inwall centralizer, and be provided with seal groove on sealing ring, the notch of seal groove arranges downwards, can play the effect that in sealed well, material upwards springs up, the sealing drilling fluid can not flow out from sleeve opening drilling fluid.
Four, in the present invention, the inwall centralizer of setting, after entering sleeve pipe, under the centering edge effect arranged on the outer wall of inwall centralizer, plays the effect of guiding when entering sleeve pipe, when creeping into, also can play to drilling assembly the technique effect of righting.
Five, adopt the present invention, can avoid when setting of casing must on this process of button, can save a large amount of activity durations.
Six, in the present invention, the cylindrical structure of described slips, a columnar structured end arranges latch, the other end is provided with the slips half the circumference of the sleeve where it joins the shoulder, and spacing keyway is arranged on the end face of slips half the circumference of the sleeve where it joins the shoulder, and this structure is arranged on spacing keyway on the end face of slips half the circumference of the sleeve where it joins the shoulder, the high strength degree, increase the safety that is lowered to sleeve pipe.
Seven, in the present invention, also be provided with the gap for slips lower end external diameter is opened on described slips, during locking, slips has the planning function, adopts deformation, increases the frictional force of latch and internal surface of sleeve pipe, and lock ability is high.
Eight, after adopting the present invention, in the setting of casing process, can empty a certain amount of drilling fluid, under the effect of buoyancy, can make casing string suspend, alleviate the derrick load.
Nine, in the present invention, spacing keyway on slips and the positioning key on axis are used in conjunction with, make can only relatively rotate between slips and axis, thereby control the relative position that drives key and slips, the slips surrounding has 4 slips keyways, coordinate four driving keys that are arranged on axis to use, make axis drive slips to rotate by driving key.
Ten, in the present invention, slips keyway and gap owing to arranging, can be lowered to the tool drives rotation of sleeve as required, or take out driving mechanism and convert with the locking of sleeve pipe between the two or unclamp, and is convenient to implement to use the mode of casing drilling; The latch arranged has good adhesive power, can effectively realize the locking with the down-hole casing wall, after inserting sleeve pipe, can be attached on casing wall, reduce the mutual swing between sleeve pipe and sleeve pipe driving mechanism, and can guarantee in the process all connected with sleeve pipe, latch can fit tightly with internal surface of sleeve pipe, reaches the sleeve pipe accident that drops that prevents.
The accompanying drawing explanation
Fig. 1 is the sleeve pipe driving head structural representation that adopts the present invention to form
Fig. 2 is the middle shaft structure schematic diagram of guiding retaining mechanism
Fig. 3 is the slips structural representation of guiding retaining mechanism
Fig. 4 is the end face structure schematic diagram of the slips half the circumference of the sleeve where it joins the shoulder of guiding retaining mechanism
Fig. 5 is the latch end face structure schematic diagram of guiding retaining mechanism
The syndeton schematic diagram that Fig. 6 is lower contact of the present invention and sealing ring
Fig. 7 is inwall centralizer structure schematic diagram of the present invention
Fig. 8 is the cross section structure schematic diagram of inwall centralizer of the present invention
In figure, be labeled as: 1, variable buckle joint, 2, axis, 3, set bolt, 4, positioning key, 5, slips, 6, drive key, 7, lower contact, 8, sealing ring, 9, inwall centralizer, 10, the joint half the circumference of the sleeve where it joins the shoulder, 11, positioning section, 12, latch, 13, drive section, 14, the slips half the circumference of the sleeve where it joins the shoulder, 15, positioning spline, 16, drive keyway, 17, gap, 18, slips keyway, 19, centering edge, 20, spacing keyway.
The specific embodiment
embodiment 1
A kind of righting sealing mechanism that is applicable to the sleeve pipe driving head, comprise lower contact 7, sealing ring 8 and inwall centralizer 9, described lower contact 7 is connected with inwall centralizer 9, be provided with the joint half the circumference of the sleeve where it joins the shoulder 10 that is one with lower contact 7 in lower contact 7, be provided for sealing the sealing ring 8 of drilling fluid between joint half the circumference of the sleeve where it joins the shoulder 10 and inwall centralizer 9, be provided with centering edge 19 on the outer wall of inwall centralizer 9.
The preferred embodiment of the present invention is, on described sealing ring 8, is provided with seal groove, and the notch of seal groove arranges downwards.
After adopting the present invention, when down-hole occurs to need to use the situation of sleeve pipe driving head, under the guiding of righting sealing mechanism, the sleeve pipe driving head will enter in sleeve pipe smoothly, the inwall centralizer 9 arranged is after entering sleeve pipe, effect due to the centering edge 15 arranged, to play the effect of guiding righting in sleeve pipe, the inwall centralizer can reduce casing wear under the effect of centering edge, remove the landwaste in drilling process, righting sleeve pipe driving head, make the position of the position of sleeve pipe driving head in sleeve pipe in center, can make like this sealing ring 8 reach best sealing effectiveness, prevent because of the eccentric seal failure caused of sealing ring 8, and the generation of down-hole circulating mud outer-flowing phenomenon, when creeping into, due to the centralizing function of inwall righting mechanism, sealing ring 8 in position placed in the middle, can be implemented sealing to annular space inwall in sleeve pipe in sleeve pipe, prevent that in drilling process, drilling fluid refluxes, therefore can effectively prevent that mud from flowing out from the annular space of sleeve pipe driving head and sleeve pipe.
The present embodiment is elaborated to the sleeve pipe driving head that adopts the present invention to form:
A kind of sleeve pipe driving head that is applicable to casing drilling, comprise variable buckle joint 1, guiding retaining mechanism and righting sealing mechanism; Described guiding retaining mechanism coordinates with sleeve pipe for put-on and delegated and revoling tube; Described righting sealing mechanism guides righting and sealing drilling fluid for the guiding retaining mechanism to being lowered in sleeve pipe; Described variable buckle joint 1, guiding retaining mechanism are connected from top to bottom successively with the righting sealing mechanism.
In the present embodiment, described guiding retaining mechanism comprises axis 2 and is socketed in the slips 5 on axis 2, and axis 2 coordinates with sleeve pipe and is used for put-on and delegated and revoling tube by slips 5.
In the present embodiment, described axis 2 comprises from top to bottom positioning section 11 and drives section 13, is fixedly installed positioning key 4 on positioning section 11, drives on section 13 to be fixedly installed to drive key 6, drive section 13 surfaces to be the conical surface, and upper end diameter is less than lower end diameter.
In the present embodiment, described slips 5 one ends are provided with the latch 12 locked with internal surface of sleeve pipe, the other end is provided with and coordinates the spacing keyway 20 that relatively rotates amplitude for controlling axis 2 and slips 5 with positioning key 4, on slips 5, also be provided with and the slips keyway 18 that drives key 6 to coordinate, axis 2 is by driving key 6 and slips keyway 18 to drive slips 5 rotations for driving sleeve rotating; When slips 5 is locked on sleeve pipe, slips 5 is positioned at and drives on section 13.
In the present embodiment, described righting sealing mechanism comprises lower contact 7, sealing ring 8 and inwall centralizer 9, lower contact 7 upper ends are connected with axis 2, lower end is connected with inwall centralizer 9, and lower end also is provided with joint half the circumference of the sleeve where it joins the shoulder 10, be provided for sealing the sealing ring 8 of drilling fluid between joint half the circumference of the sleeve where it joins the shoulder 10 and inwall centralizer 9, be provided with centering edge 19 on the outer wall of inwall centralizer 9.
In the present embodiment, the cylindrical structure of described slips 5, a columnar structured end arranges latch 12, and the other end is provided with slips half the circumference of the sleeve where it joins the shoulder 14, and spacing keyway 20 is arranged on the end face of slips half the circumference of the sleeve where it joins the shoulder 14.
In the present embodiment, also be provided with the gap 17 for slips 5 lower end external diameters are opened on described slips 5.
In the present embodiment, described slips keyway 18 and gap 17 be equidistant four roads that respectively are set on the circumference of slips 5.
In the present embodiment, described positioning key 4 is one, and driving key 6 is four, and one of them drives key 6 and positioning key 4 on same straight line.
In the present embodiment, be respectively arranged with positioning spline 15 on described axis 2 and drive keyway 16, positioning key 4 is arranged in positioning spline 15, drives key 6 to be arranged on and drives in keyway 16.
In the present embodiment, on described sealing ring 8, be provided with seal groove, the notch of seal groove arranges downwards.Described variable buckle joint 1 upper end connects drilling tool, and lower end connects axis 2.
Thereby have much for axis and slips being relatively rotated slips is locked on sleeve pipe or with the structure of sleeve pipe solution, the employing said structure is preferred forms, not only intensity is guaranteed, and can obviously improve the setting ability of sleeve pipe in bad hole, increase the safety that is lowered to sleeve pipe, reduce operating risk.
The present embodiment is further elaborated to the sleeve pipe driving head that adopts the present invention to form:
The sleeve pipe driving head comprises variable buckle joint 1, guiding retaining mechanism, righting sealing mechanism; The two ends of variable buckle joint 1 are all boxes, connect drilling tool when an end is used for constructing, and an end connects axis 2.
The guiding retaining mechanism comprises axis 2, positioning key 4, slips 5, drive key 6 and lower contact 7, and axis 2 one ends are pin thread, the other end is box, pin thread and box end at axis 2 are respectively arranged with positioning spline 15 and drive keyway 16, are provided with positioning key 4 in positioning spline 15, are provided with in driving keyway 16 and drive key 6, positioning key 4 is fixed in positioning spline 15 by set bolt 3, drives key 6 to be fixed on and to be driven in keyway 16 by set bolt 3; Slips 5 is enclosed within on the cylindrical of axis 2, slips 5 be one columnar structured, one end of slips 5 is latches 12, the other end is slips half the circumference of the sleeve where it joins the shoulder 14, be provided with slips keyway 18 and gap 17 between latch 12 and slips half the circumference of the sleeve where it joins the shoulder 14, slips keyway 18 and gap 17 be equidistant four roads that respectively arrange on the circumference of slips 5, coordinate four driving keys 6 that are arranged on axis 2 to use, and axis 2 is by driving key 6 to drive slips 5 to rotate.
The spacing keyway 20(that is provided with a miter angle on the end face of slips half the circumference of the sleeve where it joins the shoulder 14 is not limited to 45 degree, 45 degree of only take illustrate as example), coordinate the positioning key 4 be arranged on axis 2 to use, make can only relatively rotate 45 degree between slips 5 and axis 2, thereby control the relative position that drives key 6 and slips 5.The box end of axis 2 connects lower contact 7.
The righting sealing mechanism comprises lower contact 7, sealing ring 8 and inwall centralizer 9, an end that connects inwall centralizer 9 in lower contact 7 is provided with joint half the circumference of the sleeve where it joins the shoulder 10, the lower end of lower contact 7 connects inwall centralizer 9, be provided with sealing ring 8 between joint half the circumference of the sleeve where it joins the shoulder 10 and inwall centralizer 9, be provided with centering edge 19 on the cylindrical of inwall centralizer 9.
The installation of sleeve pipe driving head connects: take variable buckle joint 1 as upper end, inwall centralizer 9 is example for lower end, after each unit check processed is qualified, Cleaning of Parts to be assembled is clean, connection of thread is coated dope, and the defect of impact sealings such as must not scratching, damage while checking each sealing surface and potted component assembling exists, then the interior positioning key 4 that arranges of the positioning spline on axis 2 15, driving interior setting of keyway 16 to drive key 6, and fixing by set bolt 3, then axis 2 is inserted in slips 5, again the upper end pin thread spiral of axis 2 is connected on the lower end box of variable buckle joint 1, then the pin thread of lower contact 7 is threaded on the box of axis 2 lower ends, sealing ring 8 is sleeved on to the lower surface of lower contact half the circumference of the sleeve where it joins the shoulder 10, then inwall centralizer 9 is connected to the lower end of lower contact 7, and tighten the screw thread of each joint, lubrication oil is coated on surface at each parts that the phase mutual friction is arranged, just completed assembling.
The use procedure of sleeve pipe driving head: mainly contain three courses of work, the one, insert the process in sleeve pipe, the 2nd, drive the process that sleeve pipe rotates together, the 3rd, from the process of extracting out in sleeve pipe.
Insert the process of sleeve pipe: entered in sleeve pipe by 9 guiding of inwall centralizer under the drive of drilling tool, enter in the sleeve pipe of down-hole, because the latch 12 on slips 5 is attached on sleeve pipe, therefore, when axis 2 rotates, slips 5 can not rotate, the spacing keyway 20 of the miter angle arranged on the inner circle due to the slips half the circumference of the sleeve where it joins the shoulder 14 at slips 5 in addition can only be done the left or right of miter angle and rotate in the spacing keyway 20 of this miter angle when axis 2 is rotated, therefore, when axis 2 is rotated counterclockwise miter angle, axis 2 is the high order end with slips keyway 18 in positioning key 4, now between positioning key 4 and slips keyway 18, there is the angle of one 45 degree, due to positioning key 4 with drive key 6 in same straight line, so drive key 6 can not enter slips keyway 18, therefore drive key 6 be withstand slips 5 bottom, then continue pressurization, variable buckle joint 1 is moved downward, until variable buckle joint 1, slips shoulder 14 overlaps with the casing coupling three, miter angle again turns clockwise, axis 2 is the low order end with slips keyway 18 in positioning key 4 just, positioning key 4 is overlapped with slips keyway 18, at this moment, drive key 6 and slips keyway 18 to be on straight line, due to the diameter of position for amplifying gradually that drives key 6 being set on axis 2, therefore the interlude at axis 2 has formed a middle conical surface of shaft, reason due to the latch 12 on slips 5, when on while carrying drilling tool, slips can not moved together with axis 2, but move downward along the conical surface of axis 2, at this moment, because the gap arranged on slips 17, the external diameter of slips facing can open increase, until locked with casing inner diameter, complete the locking with sleeve pipe.
Drive the process that sleeve pipe rotates together: when running into the problem such as hole shrinkage or hole collapse, first according to two of fronts process by sleeve pipe driving head G.I.H, and complete the locking with sleeve pipe, then the rotation by drilling tool makes to drive key to enter the slips keyway, drive slips by axis and rotate, rotate together thereby drive sleeve pipe, realize the purpose of sleeve rotating, the casing pipe drill shoe that coordinates bottom to install, just can realize that the reparation of the borehole wall is with the reaming function.
From the process of extracting out in sleeve pipe: when a sleeve pipe transfer complete after, in the time of need to separately connecing a sleeve pipe, the sleeve pipe driving head is extracted out in sleeve pipe; First by drilling tool, press down variable buckle joint 1, make variable buckle joint 1, slips shoulder 14 overlaps with the casing coupling three, at this moment, the latch 12 of slips 5 has left the conical surface of axis 2, and latch 12 is unclamped from the state of locking, then be rotated counterclockwise 45 degree, make to drive key 6 to withstand slips bottom, now the driven key 6 of slips 5 withstands, and can not move downward along the conical surface of axis 2, therefore upper while carrying drilling tool, the slips external diameter can not increase; Carry variable buckle joint 1 again, and drive sleeve pipe driving head is all extracted in sleeve pipe out.
The method of operating of the sleeve pipe driving head that the present embodiment forms employing the present invention is described as follows:
Before implementing casing drilling, first the sleeve pipe driving head of needs is ready to, during enforcement, at first at first, need the sleeve pipe lower end of G.I.H to connect brill footwear and float collar, the single joint elevator re-used on rig is mentioned first sleeve pipe that connects brill footwear and float collar, put it in well, and use casing slip by first casing clamp in rotating disk, then on drilling tool, connect the sleeve pipe driving head.
Then transfer drilling tool, the sleeve pipe driving head is inserted and is placed in first sleeve pipe on rotating disk, start rig, drilling tool is turned right, drive sleeve pipe driving head right-hand rotation 45 degree and (only illustrate with 45 degree, be not limited to 45 degree), then carry drilling tool on, at this moment the strong groove of the driving key on the sleeve pipe driving head and positioning key and slips, on a straight line, above carries that drilling tool makes slips in the situation that the conical surface becomes large, therefore, the slips on the sleeve pipe driving head will be locked on casing inner diameter.
Then, upwards carry drilling tool, take out casing slip, transfer drilling tool, the drill with ferrule pole socket is entered to rotating disk, turn on pump, under the driving of rotating disk, power can reach the sleeve pipe actuating sleeve, and drives casing drilling, slowly increases the pressure of the drill and rotating speed, until first Sleeve drill is complete.
After first Sleeve drill is complete, if while needing to beat thickened drilling fluid special bags of willow branches, framed by bamboo, for building dykes well, first special bags of willow branches, framed by bamboo, for building dykes well, if do not need special bags of willow branches, framed by bamboo, for building dykes well, just directly termination of pumping, stop rig and rotate, then will carry on sleeve pipe to rotating disk, the seat upper slips, be stuck in the upper end of first sleeve pipe on rotating disk.
Then transfer drilling tool, promote the sleeve pipe driving head downward, at this moment, the conical surface on the sleeve pipe driving head exits downwards from slips, release, the slips of relief sleeve driving head, then rotation drilling tool, drive sleeve pipe driving head left-hand rotation 45 degree, more upwards carry drilling tool, in well, propose the sleeve pipe driving head.
Reuse card second sleeve pipe of slinging, insert on the sleeve pipe of deck in rotating disk, use on power casing tongs and detain and tighten.
And then transfer drilling tool, the sleeve pipe driving head is inserted and is placed in second sleeve pipe on rotating disk, start rig, drilling tool is turned right, drive sleeve pipe driving head right-hand rotation 45 degree, then carry drilling tool on, at this moment the driving key on the sleeve pipe driving head and positioning key and slips keyway are again on a straight line, on carry that drilling tool makes slips in the situation that the conical surface becomes large, therefore, the slips on the sleeve pipe driving head will be locked on casing inner diameter, then lay down the casing slip on rotating disk, transfer sleeve pipe to shaft bottom, turn on pump is implemented casing drilling, until second sleeve pipe all pierces; After second Sleeve drill is complete, repeat to implement above-mentioned steps, until arrive the design well depth.
Claims (10)
1. a righting sealing mechanism that is applicable to the sleeve pipe driving head, it is characterized in that: comprise lower contact (7), sealing ring (8) and inwall centralizer (9), described lower contact (7) is connected with inwall centralizer (9), be provided with the joint half the circumference of the sleeve where it joins the shoulder (10) that is one with lower contact (7) in lower contact (7), be provided for sealing the sealing ring (8) of drilling fluid between joint half the circumference of the sleeve where it joins the shoulder (10) and inwall centralizer (9), be provided with centering edge (19) on the outer wall of inwall centralizer (9).
2. the righting sealing mechanism that is applicable to the sleeve pipe driving head according to claim 1, it is characterized in that: described sealing ring is provided with seal groove on (8), and the notch of seal groove arranges downwards.
3. the righting sealing mechanism that is applicable to the sleeve pipe driving head according to claim 1 and 2, it is characterized in that: described lower contact (7) is connected with the guiding retaining mechanism, the guiding retaining mechanism is connected with variable buckle joint (1), described guiding retaining mechanism comprises the axis (2) be connected with lower contact (7) and is socketed in the slips (5) on axis (2), and axis (2) coordinates with sleeve pipe and is used for put-on and delegated and revoling tube by slips (5).
4. the righting sealing mechanism that is applicable to the sleeve pipe driving head according to claim 3, it is characterized in that: described axis (2) comprises from top to bottom positioning section (11) and drives section (13), be fixedly installed positioning key (4) on positioning section (11), drive on section (13) to be fixedly installed and drive key (6), drive section (13) surface to be the conical surface, and upper end diameter is less than lower end diameter.
5. the righting sealing mechanism that is applicable to the sleeve pipe driving head according to claim 4, it is characterized in that: described slips (5) one ends are provided with the latch (12) locked with internal surface of sleeve pipe, the other end is provided with and coordinates the spacing keyway (20) that relatively rotates amplitude for controlling axis (2) and slips (5) with positioning key (4), on slips (5), also be provided with and the slips keyway (18) that drives key (6) to coordinate, axis (2) is by driving key (6) and slips keyway (18) to drive the slips rotation for driving sleeve rotating; When slips (5) is locked on sleeve pipe, slips (5) is positioned at and drives on section (13).
6. the righting sealing mechanism that is applicable to the sleeve pipe driving head according to claim 5, it is characterized in that: the cylindrical structure of described slips (5), a columnar structured end arranges latch (12), the other end is provided with slips half the circumference of the sleeve where it joins the shoulder (14), and spacing keyway (20) is arranged on the end face of slips half the circumference of the sleeve where it joins the shoulder (14).
7. according to claim 3,4, the 5 or 6 described righting sealing mechanisms that are applicable to the sleeve pipe driving head, it is characterized in that: also be provided with the gap (17) for slips (5) lower end external diameter is opened on described slips (5).
8. the righting sealing mechanism that is applicable to the sleeve pipe driving head according to claim 7, it is characterized in that: described slips keyway (18) and gap (17) are equidistant four roads that respectively are set on the circumference of slips (5).
9. according to claim 4, the 5 or 6 described righting sealing mechanisms that are applicable to the sleeve pipe driving head, it is characterized in that: described positioning key (4) is one, and driving key (6) is four, and one of them drives key (6) and positioning key (4) on same straight line.
10. the righting sealing mechanism that is applicable to the sleeve pipe driving head according to claim 9, it is characterized in that: be respectively arranged with positioning spline (15) on described axis (2) and drive keyway (16), positioning key (4) is arranged in positioning spline (15), drives key (6) to be arranged on and drives in keyway (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310387129.8A CN103437716B (en) | 2013-08-30 | 2013-08-30 | Be applicable to the righting sealing mechanism of sleeve pipe driving head |
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| CN201310387129.8A CN103437716B (en) | 2013-08-30 | 2013-08-30 | Be applicable to the righting sealing mechanism of sleeve pipe driving head |
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| CN103437716B CN103437716B (en) | 2015-12-02 |
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Citations (7)
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| CN202249763U (en) * | 2011-09-08 | 2012-05-30 | 中国石油天然气集团公司 | Inside clamping-type top driving device for run casing |
| CN102913133A (en) * | 2012-10-29 | 2013-02-06 | 陕西联盟物流有限公司 | Grouting device for casing running |
| CN203559803U (en) * | 2013-08-30 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司 | Stabilizing and sealing mechanism suitable for driving head of sleeve pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3552507A (en) * | 1968-11-25 | 1971-01-05 | Cicero C Brown | System for rotary drilling of wells using casing as the drill string |
| US20060032638A1 (en) * | 2004-07-30 | 2006-02-16 | Giroux Richard L | Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
| CN201024911Y (en) * | 2007-04-04 | 2008-02-20 | 大港油田集团有限责任公司 | Top drive device for bushing artesian well |
| CN101487377A (en) * | 2009-02-26 | 2009-07-22 | 中国石油天然气集团公司 | Method for top-driving casing job of drilling apparatus |
| CN202249763U (en) * | 2011-09-08 | 2012-05-30 | 中国石油天然气集团公司 | Inside clamping-type top driving device for run casing |
| CN102913133A (en) * | 2012-10-29 | 2013-02-06 | 陕西联盟物流有限公司 | Grouting device for casing running |
| CN203559803U (en) * | 2013-08-30 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司 | Stabilizing and sealing mechanism suitable for driving head of sleeve pipe |
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| Publication number | Publication date |
|---|---|
| CN103437716B (en) | 2015-12-02 |
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Effective date of registration: 20200914 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |
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