CN103437716B - Righting sealing mechanism suitable for casing driving head - Google Patents
Righting sealing mechanism suitable for casing driving head Download PDFInfo
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- CN103437716B CN103437716B CN201310387129.8A CN201310387129A CN103437716B CN 103437716 B CN103437716 B CN 103437716B CN 201310387129 A CN201310387129 A CN 201310387129A CN 103437716 B CN103437716 B CN 103437716B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 44
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- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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Abstract
The invention discloses a centralizing sealing mechanism suitable for a casing driving head, which comprises a lower joint, a sealing ring and an inner wall centralizer, wherein the lower joint is connected with the inner wall centralizer, a joint shoulder integrated with the lower joint is arranged on the lower joint, the sealing ring used for sealing drilling fluid is arranged between the joint shoulder and the inner wall centralizer, and a centralizing edge is arranged on the outer wall of the inner wall centralizer. The invention has the guiding function when entering the casing, can also have the technical effect of strengthening the drilling tool assembly when drilling, can improve the running-in capability of the casing in a complex borehole, increases the safety of running-in the casing and reduces the operation risk.
Description
Technical field
The present invention relates to a kind of righting sealing mechanism being applicable to sleeve pipe driving head, for the drilling well using sleeve pipe to implement petroleum gas, belong to the design and manufacturing technology field of drilling equipment.
Background technology
In conventional oil gas drilling process, due to the stratum geology characteristic of 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 rotates, will be hampered card in some wells, the even sleeve pipe had can not be lowered into the problems such as desired depth, when there are these situations, construction will be caused can not to reach the requirement of engineering design, the security incident that also there will be setting of casing process had, operating risk is caused to increase, the consequences such as cost increase and construction period prolongation, the Casing Drilling Technique of prior art research, because sleeve pipe enters stratum along with under drilling tool, therefore, put on sleeve pipe is hampered Shi Jike and put sleeve pipe, the circulating system can be connected again carry out circulating and rotating, contribute to solving setting of casing to be hampered problem, improve the setting ability of sleeve pipe in bad hole, the safety of sleeve pipe is entered under increase, reduce operating risk, and effectively avoid the later cased process again of drillng operation, therefore, it is possible to effectively solve the problem, simultaneously in going down process, the instrument of sleeve pipe driving mechanism front end can enter under guiding sleeve, the effect of repairing the borehole wall and reaming can also be played, make the borehole wall more regular, thus contribute to improving cementing quality, save time and cost.
Existing cased mode is: by elevator on rig floor, after a lower complete sleeve pipe, casing clamp under elevator, at this moment with suspension ring by an other sleeve pipe down in elevator, screw casing threads, unclamp elevator, then setting of casing, by that analogy, the lower layer position to design.
Current mode is as the down hole problem such as keyway and leakage that hole shrinkage, cave-in, Drilling cause in work progress, and sleeve pipe can not continue to transfer.Existing solution is: sleeve pipe to be carried with suspension ring or transferred for several times by (1) on the whole.(2) as still continued to transfer sleeve pipe, can the circulating system be connected, circulating fluid, rinse the borehole wall, then carry upper or transfer sleeve pipe until well 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 connect drill bit with drilling rod and carry out wealthy eye and borehole wall reparation, after well dredging, drilling rod all be removed, carrying out casing job.Above process will cause the consequences such as operating risk increase, cost increase and construction period prolongation.Domestic is at present substantially all adopt said method to implement cased construction, have also at its lower end with casing pipe drill shoe, but existing casing pipe drill shoe function singleness, can not meet ring drilling fluid simultaneously, guiding sleeve enters in well, repair the function of the borehole wall.
In order to solve the problem, China Patent No. " CN200320127812.X " discloses the hydraulic casing drive head for casing drilling under a kind of rotary drilling mode, and publication date 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 publication date is on 02 23rd, 2005.But also there is following deficiency in this type of technology: one, CN200320127812.X patent must open slush pump by the downward slurry conveyed of the tube chamber of main shaft central authorities in working order as promotion descent of piston power, 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 to control pump pressure.Two, CN200320127812.X patent is the method adopting back-moving spring that slips tooth and sleeve pipe are departed from, and this method exists back-moving spring fatigue, causes the incomplete problem that resets when intensity reduces; The contact of incline plane region of piston and slips also may cause inter-adhesive and situation that is that cannot be separated due to overhigh pumping pressure.Three, in CN200320127963.5 patent, the expansion of slips and reset control are controlled by big nut drive unit, controls, complex operation although the method can carry out locking to slips; Many ramp structures of slide key do not have guiding device, cause slips to exist in expansion and reseting procedure and cannot occur jam or locking phenomenon loosely between two parties.
Summary of the invention
The object of the invention is to the problems referred to above overcoming prior art existence, a kind of righting sealing mechanism being applicable to sleeve pipe driving head is provided.Adopting the present invention to play the effect of guiding when entering sleeve pipe, also can play the technique effect of righting when creeping into drilling assembly, the setting ability of sleeve pipe in bad hole can be improved, under increase, enter the safety of 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 being applicable to sleeve pipe driving head, it is characterized in that: comprise lower contact, sealing ring and inwall centralizer, described lower contact is connected with inwall centralizer, lower contact is provided with and the joint half the circumference of the sleeve where it joins the shoulder of lower contact in one, sealing ring for sealing drilling fluid is set between joint half the circumference of the sleeve where it joins the shoulder and inwall centralizer, the outer wall of inwall centralizer is provided with centering edge.
Described sealing ring is provided with seal groove, and the notch of seal groove is arranged downwards.
Described lower contact is connected with guiding retaining mechanism, retaining mechanism is guided to be connected with variable buckle joint, described guiding retaining mechanism comprises the axis be connected with lower contact and the slips be socketed on axis, and axis is coordinated for put-on and delegated and revoling tube with sleeve pipe by slips.
Described axis comprises positioning section from top to bottom and drives section, and positioning section is fixedly installed positioning key, drives in section and is fixedly installed 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 the spacing keyway coordinating with positioning key and relatively rotate amplitude for controlling axis and slips, slips is also provided with and the slips keyway driving key to coordinate, axis drives slips to rotate for driving sleeve rotating by driving key and slips keyway; When slips is locked on sleeve pipe, slips is positioned at and drives in section.
The cylindrical structure of described slips, columnar structured one end arranges latch, and the other end is provided with 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.
Described slips is also provided with the gap for making slips lower end external diameter open.
Described slips keyway and gap are respectively set to four roads the circumferentially equidistant of slips.
Described positioning key is one, drives key to be four, and one of them drives key and positioning key on the same line.
Described axis be respectively arranged with positioning spline 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:
When one, occurring that the down hole problem setting of casings such as undergauge, cave-in, keyway and leakage are hampered in well, the sleeve pipe driving head utilizing the present invention to be formed both can put-on and delegated sleeve pipe, the circulating system can be connected again and carry out mud circulation and revoling tube, contribute to solving setting of casing to be hampered problem, improve the setting ability of sleeve pipe in bad hole, enter the safety of sleeve pipe under increase, reduce operating risk.
Two, in the present invention, under guiding the effect of the latch of retaining mechanism on slips, when being attached on casing wall after insertion sleeve pipe, effectively can reduce the mutual swing between sleeve pipe and the present invention, and can ensure in the whole process connected with sleeve pipe, the latch of slips can fit tightly with internal surface of sleeve pipe, reaches and prevents sleeve pipe to drop accident.
Three, in the present invention, between joint half the circumference of the sleeve where it joins the shoulder and inwall centralizer, be provided with sealing ring, and sealing ring is provided with seal groove, the notch of seal groove is arranged downwards, can play the effect that in sealed well, material upwards springs up, sealing drilling fluid makes drilling fluid can not flow out from sleeve opening.
Four, in the present invention, the inwall centralizer of setting, after entering sleeve pipe, under the centering edge effect that the outer wall of inwall centralizer is arranged, plays the effect of guiding when entering sleeve pipe, also can play the technique effect of righting when creeping into drilling assembly.
Five, adopt the present invention, can to avoid when setting of casing must on detain this process, a large amount of activity duration can be saved.
Six, in the present invention, the cylindrical structure of described slips, columnar structured one end arranges latch, the other end is provided with 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 spacing keyway is arranged on the end face of slips half the circumference of the sleeve where it joins the shoulder by this structure, high strength degree, enters the safety of sleeve pipe under increase.
Seven, in the present invention, described slips is also provided with the gap for making slips lower end external diameter open, during locking, slips has the planning function, adopts deformation, and increase the frictional force of latch and internal surface of sleeve pipe, lock ability is high.
Eight, after adopting the present invention, a certain amount of drilling fluid can be emptied in setting of casing process, under the effect of buoyancy, casing string can be made to suspend, alleviate derrick load.
Nine, in the present invention, spacing keyway on slips and the positioning key on axis with the use of, make can only relatively rotate between slips and axis, thus control the relative position driving key and slips, slips surrounding has 4 slips keyways, coordinating four of being arranged on axis to drive key to use, making axis drive slips to rotate by driving key.
Ten, in the present invention, due to the slips keyway that arranges and gap, can as required under enter tool drives rotation of sleeve, or take out driving mechanism and convert with the locking of sleeve pipe between the two or unclamp, be convenient to implement to use the mode of casing drilling; The latch arranged has good adhesive power, effectively can realize the locking with down-hole casing wall, when being attached on casing wall after insertion sleeve pipe, reduce the mutual swing between sleeve pipe and sleeve pipe driving mechanism, and can ensure in the process all connected with sleeve pipe, latch can fit tightly with internal surface of sleeve pipe, reaches and prevents sleeve pipe to drop accident.
Accompanying drawing explanation
Fig. 1 is the sleeve pipe driving head structural representation adopting the present invention to be formed
Fig. 2 is the middle shaft structure schematic diagram guiding retaining mechanism
Fig. 3 is the slips structural representation 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 guiding retaining mechanism
Fig. 5 is the latch end face structure schematic diagram guiding retaining mechanism
Fig. 6 is the syndeton schematic diagram of 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
Be labeled as in figure: 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, joint half the circumference of the sleeve where it joins the shoulder, 11, positioning section, 12, latch, 13, drive section, 14, 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.
Detailed description of the invention
embodiment 1
A kind of righting sealing mechanism being applicable to 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, lower contact 7 is provided with and the joint half the circumference of the sleeve where it joins the shoulder 10 of lower contact 7 in one, sealing ring 8 for sealing drilling fluid is set between joint half the circumference of the sleeve where it joins the shoulder 10 and inwall centralizer 9, the outer wall of inwall centralizer 9 is provided with centering edge 19.
The preferred embodiment of the present invention is, described sealing ring 8 is provided with seal groove, and the notch of seal groove is arranged downwards.
After adopting the present invention, when down-hole needs the situation using sleeve pipe driving head, under the guiding of righting sealing mechanism, sleeve pipe driving head will enter in sleeve pipe smoothly, the inwall centralizer 9 arranged is after entering sleeve pipe, due to the effect of the centering edge 15 of setting, the effect guiding righting will be played in sleeve pipe, inwall centralizer can reduce casing wear under the effect of centering edge, remove the landwaste in drilling process, righting sleeve pipe driving head, the position of sleeve pipe driving head in sleeve pipe is made to be in the position of center, the sealing effectiveness that sealing ring 8 reaches best can be made like this, prevent the seal failure caused because sealing ring 8 is eccentric, 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 is in position placed in the middle in sleeve pipe, can implement sealing to annular space inwall in sleeve pipe, prevent drilling fluid return in drilling process, therefore can effectively prevent mud from flowing out from the annular space of sleeve pipe driving head and sleeve pipe.
embodiment 2
The present embodiment is described in detail to the sleeve pipe driving head adopting the present invention to be formed:
Be applicable to a sleeve pipe driving head for casing drilling, comprise variable buckle joint 1, guide retaining mechanism and righting sealing mechanism; Described guiding retaining mechanism coordinates with sleeve pipe and is used for put-on and delegated and revoling tube; Described righting sealing mechanism be used under the guiding retaining mechanism entered in sleeve pipe guide righting and sealing drilling fluid; Described variable buckle joint 1, guiding retaining mechanism are connected from top to bottom successively with righting sealing mechanism.
In the present embodiment, the slips 5 that described guiding retaining mechanism comprises axis 2 and is socketed on axis 2, axis 2 is coordinated with sleeve pipe by slips 5 and is used for put-on and delegated and revoling tube.
In the present embodiment, described axis 2 comprises positioning section 11 from top to bottom and drives section 13, positioning section 11 is fixedly installed positioning key 4, drives in section 13 and is fixedly installed driving key 6, drive section 13 surface in the conical surface, and upper end diameter is less than lower end diameter.
In the present embodiment, described slips 5 one end is provided with the latch 12 locked with internal surface of sleeve pipe, the other end is provided with the spacing keyway 20 coordinating with positioning key 4 and relatively rotate amplitude for controlling axis 2 and slips 5, slips 5 is also provided with and the slips keyway 18 driving key 6 to coordinate, axis 2 drives slips 5 to rotate for driving sleeve rotating by driving key 6 and slips keyway 18; When slips 5 is locked on sleeve pipe, slips 5 is positioned at and drives in 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 end is connected with axis 2, lower end is connected with inwall centralizer 9, and lower end is also provided with joint half the circumference of the sleeve where it joins the shoulder 10, sealing ring 8 for sealing drilling fluid is set between joint half the circumference of the sleeve where it joins the shoulder 10 and inwall centralizer 9, the outer wall of inwall centralizer 9 is provided with centering edge 19.
In the present embodiment, the cylindrical structure of described slips 5, columnar structured one 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, described slips 5 is also provided with the gap 17 for making slips 5 lower end external diameter open.
In the present embodiment, described slips keyway 18 and gap 17 are respectively set to four roads the circumferentially equidistant of slips 5.
In the present embodiment, described positioning key 4 is one, drives key 6 to be four, and one of them drives key 6 and positioning key 4 on the same line.
In the present embodiment, described axis 2 be respectively arranged with positioning spline 15 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, described sealing ring 8 is provided with seal groove, and the notch of seal groove is arranged downwards.Described variable buckle joint 1 upper end connects drilling tool, and lower end connects axis 2.
Relatively rotate for making axis and slips thus make slips be locked on sleeve pipe or have a lot with sleeve pipe formal similarity, employing said structure is preferred forms, not only intensity is guaranteed, and the setting ability of sleeve pipe in bad hole can be significantly improved, enter the safety of sleeve pipe under increase, reduce operating risk.
embodiment 3
The present embodiment is further elaborated to the sleeve pipe driving head adopting the present invention to be formed:
Sleeve pipe driving head comprises variable buckle joint 1, guides retaining mechanism, righting sealing mechanism; The two ends of variable buckle joint 1 are all boxes, connect drilling tool when one end is for constructing, and one end connects axis 2.
Retaining mechanism is guided to comprise axis 2, positioning key 4, slips 5, drive key 6 and lower contact 7, axis 2 one end is pin thread, the other end is box, be respectively arranged with positioning spline 15 at the pin thread of axis 2 and box end and drive keyway 16, in positioning spline 15, being provided with positioning key 4, being provided with in driving keyway 16 and driving key 6, positioning key 4 is fixed in positioning spline 15 by set bolt 3, drives key 6 to be fixed on by set bolt 3 and drives in keyway 16; Slips 5 is enclosed within the cylindrical of axis 2, slips 5 be one columnar structured, one end of slips 5 is latch 12, the other end is slips half the circumference of the sleeve where it joins the shoulder 14, slips keyway 18 and gap 17 is provided with between latch 12 and slips half the circumference of the sleeve where it joins the shoulder 14, slips keyway 18 and gap 17 respectively arrange four roads the circumferentially equidistant of slips 5, and coordinate four of being arranged on axis 2 to drive key 6 to use, axis 2 drives slips 5 to rotate by driving key 6.
The spacing keyway 20(that the end face of slips half the circumference of the sleeve where it joins the shoulder 14 is provided with a miter angle is not limited to 45 degree, only illustrate for 45 degree), the positioning key 4 be arranged on axis 2 is coordinated to use, make can only relatively rotate 45 degree between slips 5 and axis 2, thus control the relative position driving key 6 and slips 5.The box end of axis 2 connects lower contact 7.
Righting sealing mechanism comprises lower contact 7, sealing ring 8 and inwall centralizer 9, the one end connecting 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, between joint half the circumference of the sleeve where it joins the shoulder 10 and inwall centralizer 9, be provided with sealing ring 8, the cylindrical of inwall centralizer 9 is provided with centering edge 19.
The installation of sleeve pipe driving head connects: with variable buckle joint 1 for upper end, inwall centralizer 9 for lower end be example, after each unit check processed is qualified, by clean for Cleaning of Parts to be assembled, connection of thread coats dope, and the defect that must not scratch when checking each sealing surface and potted component assembling, damage etc. affects sealing exists, then in the positioning spline 15 on axis 2, positioning key 4 is set, arrange in driving keyway 16 and drive key 6, and fixed 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 end, sealing ring 8 is sleeved on 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 the surface of each parts having phase mutual friction, just complete assembling.
The use procedure of sleeve pipe driving head: mainly contain three courses of work, one is insert the process in sleeve pipe, and two is the processes driving sleeve pipe to rotate together, and three is the processes of extracting out in sleeve pipe.
Insert the process of sleeve pipe: guided by inwall centralizer 9 under the drive of drilling tool and enter in sleeve pipe, 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 miter angle in addition owing to arranging in the inner circle of the slips half the circumference of the sleeve where it joins the shoulder 14 of slips 5, the left or right can only doing miter angle when axis 2 is rotated in the spacing keyway 20 of this miter angle is rotated, therefore, when axis 2 is rotated counterclockwise miter angle, axis 2 is in the high order end of positioning key 4 and slips keyway 18, now there is the angle of 45 degree between positioning key 4 and slips keyway 18, because positioning key 4 is in same straight line with driving key 6, so drive key 6 can not enter slips keyway 18, therefore drive key 6 be withstand slips 5 bottom, then pressurization is continued, variable buckle joint 1 is moved downward, until variable buckle joint 1, slips shoulder 14 overlaps with casing coupling three, turn clockwise miter angle again, axis 2 is just in the low order end of positioning key 4 and slips keyway 18, positioning key 4 is overlapped with slips keyway 18, at this moment, drive key 6 and slips keyway 18 place point-blank, because position axis 2 being arranged driving key 6 is the diameter amplified gradually, therefore define a middle conical surface of shaft at the interlude of axis 2, due to the reason of the latch 12 on slips 5, when on carry drilling tool time, slips can not be moved together with axis 2, but move downward along the conical surface of axis 2, at this moment, because the gap that slips is arranged 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 processes above by sleeve pipe driving head G.I.H, and complete the locking with sleeve pipe, then driving key is made to enter slips keyway by the rotation of drilling tool, drive slips to rotate by axis, thus drive sleeve pipe to rotate together, realize the object of sleeve rotating, the casing pipe drill shoe coordinating bottom to install, just can realize the reparation of the borehole wall with reaming function.
The process of extracting out in sleeve pipe: when a sleeve pipe transfer complete after, when needing separately to connect a sleeve pipe, sleeve pipe driving head is extracted out in sleeve pipe; First press down variable buckle joint 1 by drilling tool, make variable buckle joint 1, slips shoulder 14 overlaps with 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 45 degree are rotated counterclockwise, make driving key 6 withstand slips bottom, now slips 5 is withstood by driving key 6, can not move downward along the conical surface of axis 2, therefore upper carry drilling tool time, slips external diameter can not increase; Carry variable buckle joint 1 again, and drive sleeve pipe driving head all to extract out in sleeve pipe.
embodiment 4
The method of operating of the present embodiment to the sleeve pipe driving head adopting the present invention to be formed is described as follows:
Before implementing casing drilling, first the sleeve pipe driving head of needs is ready to, during enforcement, first need its lower end of G.I.H to connect at first and bore footwear and float collar, the single joint elevator re-used on rig mentions first sleeve pipe connecting and bore footwear and float collar, put it in well, and use casing slip by first casing clamp in rotating disk, sleeve pipe driving head on then connecting on drilling tool.
Then drilling tool is transferred, sleeve pipe driving head is inserted in first sleeve pipe be placed on rotating disk, start rig, drilling tool is turned right, drive sleeve pipe driving head to turn right 45 degree and (only illustrate with 45 degree, be not limited to 45 degree), then carry drilling tool on, the driving key at this moment on sleeve pipe driving head and positioning key and slips are good for groove and are on a straight line, above carry drilling tool and make slips become large when the conical surface, therefore, the slips on sleeve pipe driving head will be locked on casing inner diameter.
Then, upwards carry drilling tool, take out casing slip, transfer drilling tool, drill with ferrule pole socket is entered rotating disk, turn on pump, under the driving of rotating disk, power can reach sleeve pipe actuating sleeve, and drives casing drilling, slowly increases the pressure of the drill and rotating speed, until by complete for first Sleeve drill.
After first Sleeve drill is complete, if when 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 direct termination of pumping, stop rig rotating, then will sleeve pipe be carried to rotating disk, seat upper slips, be stuck in the upper end of first sleeve pipe on rotating disk.
Then transfer drilling tool, promote sleeve pipe driving head downward, at this moment, the conical surface on sleeve pipe driving head exits downwards from slips, unlock, the slips of relief sleeve driving head, then rotation drilling tool, drive sleeve pipe driving head to turn left 45 degree, more upwards carry drilling tool, in well, propose sleeve pipe driving head.
Reuse card to sling second sleeve pipe, insert on the sleeve pipe of deck in rotating disk, use and power casing tongs detains and tightens.
And then transfer drilling tool, sleeve pipe driving head is inserted in second sleeve pipe be placed on rotating disk, start rig, drilling tool is turned right, sleeve pipe driving head is driven to turn right 45 degree, then drilling tool is carried on, at this moment the driving key on sleeve pipe driving head and positioning key and slips keyway are on a straight line again, on carry drilling tool slips become when the conical surface greatly, therefore, the slips on sleeve pipe driving head will be locked on casing inner diameter, then the casing slip on rotating disk is laid down, transfer sleeve pipe to shaft bottom, turn on pump implements casing drilling, until second sleeve pipe all pierces; After second Sleeve drill is complete, repeat to implement above-mentioned steps, until arrive design well depth.
Claims (7)
1. one kind is applicable to the righting sealing mechanism of 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), lower contact (7) is provided with and the joint half the circumference of the sleeve where it joins the shoulder (10) of lower contact (7) in one, sealing ring (8) for sealing drilling fluid is set between joint half the circumference of the sleeve where it joins the shoulder (10) and inwall centralizer (9), the outer wall of inwall centralizer (9) is provided with centering edge (19);
Described lower contact (7) is connected with guiding retaining mechanism, retaining mechanism is guided to be connected with variable buckle joint (1), described guiding retaining mechanism comprises the axis (2) be connected with lower contact (7) and the slips (5) be socketed on axis (2), and axis (2) coordinates for put-on and delegated and revoling tube by slips (5) with sleeve pipe;
Described axis (2) comprises positioning section (11) from top to bottom and drives section (13), positioning section (11) is fixedly installed positioning key (4), drive in section (13) and be fixedly installed driving key (6), drive section (13) surface in the conical surface, and upper end diameter is less than lower end diameter;
(8) are provided with seal groove with described sealing ring, and the notch of seal groove is arranged downwards.
2. the righting sealing mechanism being applicable to sleeve pipe driving head according to claim 1, it is characterized in that: described slips (5) one end is provided with the latch (12) locked with internal surface of sleeve pipe, the other end is provided with the spacing keyway (20) coordinating with positioning key (4) and relatively rotate amplitude for controlling axis (2) and slips (5), slips (5) is also provided with and the slips keyway (18) driving key (6) to coordinate, axis (2) drives slips to rotate for driving sleeve rotating by driving key (6) and slips keyway (18); When slips (5) is locked on sleeve pipe, slips (5) is positioned at and drives in section (13).
3. the righting sealing mechanism being applicable to sleeve pipe driving head according to claim 2, it is characterized in that: described slips (5) cylindrical structure, columnar structured one 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).
4. the righting sealing mechanism being applicable to sleeve pipe driving head according to Claims 2 or 3, is characterized in that: described slips (5) is also provided with the gap (17) for making slips (5) lower end external diameter open.
5. the righting sealing mechanism being applicable to sleeve pipe driving head according to claim 4, is characterized in that: described slips keyway (18) and gap (17) are respectively set to four roads the circumferentially equidistant of slips (5).
6. the righting sealing mechanism being applicable to sleeve pipe driving head according to claim 3 or 5, is characterized in that: described positioning key (4) is one, drives key (6) to be four, and one of them drives key (6) and positioning key (4) on the same line.
7. the righting sealing mechanism being applicable to sleeve pipe driving head according to claim 6, it is characterized in that: described axis (2) be respectively arranged with positioning spline (15) 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310387129.8A CN103437716B (en) | 2013-08-30 | 2013-08-30 | Righting sealing mechanism suitable for casing driving head |
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| CN103437716A CN103437716A (en) | 2013-12-11 |
| CN103437716B true CN103437716B (en) | 2015-12-02 |
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| US3552507A (en) * | 1968-11-25 | 1971-01-05 | Cicero C Brown | System for rotary drilling of wells using casing as the drill string |
| 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 | Righting sealing mechanism suitable for casing driving head |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7503397B2 (en) * | 2004-07-30 | 2009-03-17 | Weatherford/Lamb, Inc. | Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
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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 |
| 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 | Righting sealing mechanism suitable for casing driving head |
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| CN103437716A (en) | 2013-12-11 |
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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. |