CN1054644A - In sub-sea drilled wells, discharge the equipment of grouting pipe close at a distance - Google Patents

Abstract

Oil well rig comprises: be communicated with inner sleeve ground, and from the downward releasing tube that extends of assembly appliance, what be fixed on releasing tube bottom hangs tube 31, and its cross section is less than the cross section of inner sleeve, hang the tube bottom opening and in dress at least one have the pipe close 33 of circumferential antelabium 35; Can slide and comprise the releasing device of an axial tappet 38 in releasing tube, it matches with pipe close, and piston 37 is fixed together with tappet, and releasing device is axially remained in the releasing tube still by the limited stop device 40 of intensity.

Description

In sub-sea drilled wells, discharge the equipment of grouting pipe close at a distance

The present invention relates to the offshore oil field probing carried out from any type of floating platform or fixed platform.

If more particularly relevant technologies is offshore drilling, then the definition of sub-sea drilled wells should be thought and comprises all applicable cases, and wherein oil well spuds in from a kind of like this bottom, and there is the salt solution of certain depth of water this water-bed top, or the sewage of certain depth of water, or common seawater.

More particularly target of the present invention is the various facilities and equipment that comprise that the inner sleeve to the drilling well wellhole is in the milk.

Though because those skilled in the art are very familiar to this, need not carry out very detailed description to the consolidation grouting of the inner sleeve that made hole, yet what should remind is that these grouting techniques are included in the pipe close that discharges sealing in the sleeve pipe, be called the bottom tube plug, it is used for carrying out cleaning by the scraping internal surface of casing, the vestige of mud when eliminating drilling well, and prevent contacting of mud and cement paste.

Pressure fluid is depended in the release of this bottom tube plug, for example cement paste particularly.After in known manner the bottom tube plug being positioned on " snap ring floats " or the similar item, the mistake of generation is pressed in and leaves some holes on bottom tube the crushed diaphragm beyond the Great Wall.Usually after cement paste is pumped into the down-hole, in a different operating process of following, in an identical manner so-called push pipe plug is discharged, make it enter same sleeve pipe, and also under the driving of pressure fluid, move.

The effect of push pipe plug is to promote cement paste or the similar item before pumped into by the bottom tube plug, thereby makes it pass through the annular gap that forms or " annular space " refluence that makes progress between inner sleeve and contiguous structure or outer tube.

When should be understood that the drilling well at sea of this process the operation very difficult, its reason is that the grouting facility that has pipe close usually is arranged on operation framework or " derrick ".When carrying out ocean floor drilling, carry out this grouting and will cause making two pipe closes, thereby produce a lot of inconveniences and problem by this very long distance between offshore boring island and the seabed.

In order to reduce the inconvenience that causes owing to this operation, some solutions are proposed in the prior art, one of them admissible scheme is based upon on the basis of EP-A-O 167 285.

According to these technology, first sleeve pipe that is called outer tube of equipment oil well stretches out from the seabed, and supports an inner sleeve by a pipe carrier.One adapter also is housed on the pipe carrier, is called " assembly appliance ", it extends upwardly by drilling pipe, by the whole depth of water, thereby links to each other with platform, and a pipe that is supported with delivery system is arranged on platform, and this delivery system is used to emit one or more lances joints.

Assembly appliance can suspend the pipe close of one or several associated in midair in inner sleeve, the antelabium of pipe close is by radial compression, thereby forms sealing with the perisporium of inner sleeve.

Delivery system comprises the lance joint that equates with pipe close quantity, and they can be discharged continuously, so that pipe close is held continuously and discharges by known mechanically actuated.

Some inconvenience of this technology, wherein topmost as described below.

Pipe close/assembly appliance assembly must be threaded on the pipe carrier, therefore the antelabium on each pipe close will be subjected to the frictional force effect, thereby cause pipe close to damage, might make them can't produce the effect of sealing, mechanical stress may be destroyed the shear pin between the pipe close or make their distortion in addition.

For pipe close can be discharged continuously, these pipe closes need a tubular construction, thereby can make the lance joint continuously by them.A kind of like this structural requirement is processed meticulous and is involved great expense, and not only needs in addition between two pipe closes in succession linkage is set, and sealing device also needs release or kickoff mechanism by the effect of lance joint.In addition, this pipe close also need have extra connection and sealing device, and each in them all constitutes the assembly of a sealing, can finish the operation of pipe close with corresponding lance joint.

These different devices are all complicated especially, and are special-purpose, so those standard pipe closes that use when the ground drilling operation usually can not be used for ocean floor drilling.

In addition, each lance joint only is applicable to corresponding pipe close, and it involves great expense, but can only use once.

On the other hand, occur a lance festival-gathering on each pipe close and in the drillng operation of following, cause a problem,, need carry out drilling well once more because after the consolidation grouting operation.

These different problems have been brought an economic problem, because they significantly increase drilling cost, and have increased the drilling well difficulty, and these problems are to be difficult to solve sometimes.

The present invention is intended to by providing a kind of novel release device that is used for the consolidation grouting pipe close of sub-sea drilled wells or similar structures to overcome above-mentioned inconvenience.

The objective of the invention is to propose a kind of equipment, the standard pipe close that uses when it can use ground drilling and consolidation grouting operation.

Another object of the present invention is to propose a kind of simple, reliable and firm equipment, and it can be suitable with the normally used technical equipment of institute in ocean floor drilling and the consolidation grouting.

The 3rd purpose of the present invention is to propose a kind of equipment, and its recyclable remote outer lance saves, thereby lowered the operating cost when this equipment is operated, and eliminated pipe close drilling problem thereafter.

To achieve these goals, comprise lance joint delivery system according to remote release device of the present invention, it comprises at least one lance joint and is contained on the drilling pipe, this drilling pipe extends upward from the assembly appliance that is contained on the inner sleeve, it is characterized in that it comprises that one is installed in the remote release in the inner sleeve and comprises:

One releasing tube, it is communicated with inner sleeve ground, and from assembly appliance downwards and drilling pipe extend coaxially.

One is fixed on the tube that hangs of releasing tube bottom, and its cross section is less than the cross section of inner sleeve, and at least one has the pipe close of circumferential antelabium to hang tube bottom opening and interior dress, and pipe close is axially remained on still by radial precompressed antelabium and hangs in the tube,

One can slide and comprise the releasing device of an axial tappet in releasing tube, this tappet and piston are fixed together, releasing device matches with pipe close, releasing device axially remains in the releasing tube by the limited stop device of intensity still, and under the lance joint institute applied pressure effect that arrives and move axially, described lance joint is from delivery system, when the releasing device that slides after the limited axial stroke of process, just can be discharged pipe close and hang tube in releasing tube.

Other each characteristics by following description and with reference to the accompanying drawings shown in embodiments of the invention will become clearer, shown embodiment there is no limited significance to the present invention.

Fig. 1 is the schematic diagram of present device.

Fig. 2 is a vertical diagrammatic cross-sectional view, and expression constitutes one of them member of this equipment.

Fig. 3 is the axial sectional view along III among Fig. 1-the III line is got.

Fig. 4 is a longitudinal section that amplifies, and shows a part of detailed structure among Fig. 3.

Fig. 5 is the part longitudinal section along V among Fig. 4-amplification that the V line is got.

Fig. 6 to Fig. 9 is scaled down longitudinal section, 4 special modes of operation of expression present device.

Fig. 1 shows application of the present invention briefly, and this field comprises the consolidation grouting of drilling well and oil well 1 or similar well, and this oil well 1 starts from seabed S, and the depth of water is H.Best applications of the present invention field, what should quote as proof is to carry out offshore drilling from the ocean platform 2 that chain-dotted line 9 is represented, this platform can be any type of floating platform or fixed platform.

When first sleeve pipe 3 that is commonly referred to outer tube had been located, the drilling well step of oil well 1 comprised inner sleeve 4 is set, and pipe 4 defines an annular gap or an annulus 5 that needs consolidation grouting with pipe 3 and/or well.Purpose of the present invention is particularly in from platform 2 far distance controlled being carried out in this grouting operation.

Comprise a remote release 6 according to the remote release device of pipe close of the present invention, under an assembly appliance 7 suspentions, assembly appliance 7 is installed on the pipe carrier 8 of inner sleeve 4 in inner sleeve 4 for it.Assembly appliance 7 comprises an annular element, and it is arranged on by known devices on the end of drilling pipe 9, and drilling pipe 9 extends on the platform 2, can discharge the delivery system that one or more lances save so that support one in its part that surfaces and in platform 2.

Fig. 2 represents an embodiment of system 10, and it comprises a shell 11, and it defines a cylindrical cavity 12.Cavity 12 can be communicated with at least one pressure fluid circuit 13 by a plurality of joints.This loop 13, though not shown among Fig. 2, can link to each other so that various fluids to be provided with several loops, these fluids are generally used for known oil well consolidation grouting.

When the consolidation grouting operation is carried out in equipment operation of the present invention, discharge two continuous pipe closes, so-called bottom tube plug and push pipe plug are equipped with two advance by leaps and bounds lance joint 14a and 14b in the cavity 12, and they discharge the lance joint as the bottom tube plug respectively and the push pipe plug discharges the lance joint.Lance joint 14a, 14b make by known mode, and it comprises that one has the body 15 of deformable circumferential antelabium 16, and circumferentially antelabium 16 is radially pressurizeed and combines with cavity 12, so that form circumferential seal between cavity 12 and body 15.More preferably, each lance joint 14 comprises that one impacts a termination 17 and a sealing back cushion pad 18.

Lance joint 14a and 14b quilt be static remaining in the cavity 12 axially, and be spaced from each other by returnable retainer 19a and 19b, and retainer can be any type of manual or mobile operation device.

In illustrated embodiment, cavity 12 comprises two lance joints, is provided with three interfaces 20,21,22, and these interfaces link to each other with loop 13 with 25 by switch 23,24.Cavity 12 upper sheds of interface 20 below lance joint 14a, cavity 12 upper sheds of interface 21 between lance joint 14a and 14b, cavity 12 upper sheds of interface 22 above lance joint 14b.

In the mud circulation operation, switch 24,25 cuts out, and switch 23 is opened, so that by interface 20 mud or similar item are introduced in the oil well.

It is evident that this consolidation grouting or drillng operation can use the system 10 that comprises varying number lance joint, for example a lance saves or three.In one example of back, cavity 12 will have 4 interfaces to be communicated with loop 13.

Fig. 3 and 4 expresses remote release in more detail, and it represents with 6 that usually a kind of like this release comprises a releasing tube 30, and it is fixed on the assembly appliance 7 and extends downwards coaxially with drilling pipe 9 in inner sleeve 4.The length of releasing tube 30 is the sum total of each single lance joint length, and these lance joints may have different length.

Be connected to a columnar tube 31 that hangs on the bottom of releasing tube 30, it is under shed, and its external diameter is less than the internal diameter of inner sleeve 4.Hanging tube 31 can be communicated with inner sleeve 4 by particularly being arranged on the aperture 32 of hanging a last differing heights.

31 be used for clamping pipe close 33 with the tube that hangs of sleeve pipe 4 coaxial arrangement, two pipe closes for example, i.e. bottom tube plug and push pipe plug, they are radially pressurizeed and are kept motionless, and join up and down and be stacked together.Pipe close 33 is the sort of forms when being used for the operation of ground drilling consolidation grouting, and it generally includes a body 34, and the periphery that has elastically deformable on it is to antelabium 35.Pipe close is axially remained on by precommpression antelabium 35 and is hung in the tube.

Pipe close 33 is models of standard, promptly with the operation of corresponding ground drilling consolidation grouting in use the same.

The quantity of pipe close 33 is relevant with the quantity of lance joint 14, and the axial length of each pipe close 33 is chosen to corresponding lance joint length suitable.Pipe close 33 preferably has same length, and this length equals the length of lance joint 14.

In the represented example of Fig. 3, hang tube 31 and when work, maintain a bottom tube plug 33a and a push pipe plug 33b.It is evident that,, hang tube and 31 can comprise a single pipe close 33, perhaps three pipe closes 33 for example according to the technology of being developed.

Particularly when having hanging 31 whens work of tube of at least two pipe closes, the example as shown in Fig. 3 and 4, release 6 comprise a remote releasing device 36, and its telescopically is arranged in the releasing tube 30.Remote releasing device 36 comprises a piston 37, and it has lance joint positioning boss and to its tappet 38 that oppositely extends, the end 39 of tappet 38 combines with push pipe plug 33b.

In releasing tube 30, remote releasing device 36 is by the limited axial static holding fix that remains on of stop device 40 quilts of mechanical strength.These devices 40 can comprise the shearing-type bolt, and the circumferential slot 41 of formation combines on the wall that they pass releasing tube 30 and the piston 37.Device 40 position is decision like this, and promptly they are suitable with the maximal dilation position of tappet 38, and when this position, end parts 39 combines with pipe close 33b, and pipe close 33b and pipe close 33a axially join, and all is contracted in and hangs in tins 31.

Can find out that from the following description releasing device 36 is used for controlling pipe close 33a, 33b from hanging the continuous discharge of tube 31.For reaching this purpose, on releasing tube, be provided with two stop device 40a and 40b that intensity is limited, it acts on as shown in Figure 3, is for tappet 38 static initial position and the centre positions of remaining on.Hold three pipe closes 33 if hang in the tube 31, then also need on pipe 30, the limited stop device of third level intensity to be set.In all cases, the end 30 of pipe 30 ₁ Comprise gasket ring 42 in, it is as the seat that ends at piston 37 stroke dead points.

First order stop device is positioned at apart from the top axial distance of releasing tube and equals at least on the position of a lance joint length.

Axial spacing between two stop devices 40 and/or the gasket ring 42 is relevant with the axial length of pipe close 33.In the present embodiment, this length equals the length of pipe close 33, and saves 14 equal in length with lance.

Passage 43 forms on the releasing tube 30 above the position, top of piston 37.Passage 43 is used to make from aboveground fluid inner and hang tube 31 an outside annular gap or annular spaces that form and flow in the sleeve pipe 4 by inner sleeve 4.

Passage 43 in hole with fine finishining barrel or the bottom of cavity 45 form, accurately machined barrel forms on the top of releasing tube 30, so that form sealing with the cushion pad 18 of seal or lance joint 14.The diameter in hole 45 needs adaptive, smaller from the diameter of system's 10 beginnings than all, thereby when cushion pad 18 during with desirable state arrival hole 45, they will compress into hole 45 truly.The axial length in hole 45 equals the length of lance joint 14 at least.

Also have pressure compensation opening 46 on releasing tube 30, it is arranged between pipe 30 the bottom and passage 43, thereby except the thrust that lance joint 14a and 14b cause, releasing device 36 does not have other external force effect.

For same purpose, only also be provided with axial compression balance slotted eye 47 on seat (ring) 42.

When using two pipe closes 33, combining between tappet 38 end parts 39 and the push pipe plug 33b by the connector 50 assurance (see figure 5)s that get loose certainly.This connector 50 comprises a sear 51, and it is contained in the tappet 38 slidably.This sear 51 is by the static settling position that remains on, and comprise that one is engaged on the termination 52 in the end parts 39, be used to control extending radially out of the scalable locking pin 53 of elasticity, locking pin 53 is located in the end parts 39, and end parts 39 constitutes the plush copper suitable with the complementary cavity volume that forms 54 on push pipe plug 33b top.On the circumferentially extending position, the mating groove in locking pin 53 and the cavity volume 54 is meshed.

Sear 51 can only depend on gravity or remain on a settling position still by a pin 55, and pin 55 passes releasing tube 30, as shown in Figure 5.Pin 55 is mechanical strength shearing-type pins littler than stop device 40b.Tappet 51 preferably includes termination 56, a pin 57 that has two pins 57 and is passed in the axial long pilot hole 58 that forms in the tappet 38.Pin 57 protruding tappets 38, so that they can combine with ending seat 42, this will be described below.

In the consolidation grouting operation, remote release device operates as follows.

When bottom tube plug 33a need discharge, from state shown in Figure 3, switch 23 cut out, and switch 24 is opened, thereby pressure fluid is from loop 13 enters cavity 12 between lance joint 14a and the 14b, and described fluid can be the mix cement slurry of any known prescription.

Control telescopic retainer 19a and discharge lance joint 14a, lance joint 14a is promoted to advance by pressure fluid in drilling pipe 9.Lance joint 14a then enter in the cavity 45 and with its engagement, form sealing by back cushion pad 18.

Lance joint 14a contacts with piston 37, begins operation thereby trigger releasing device 36.From position shown in Figure 6, sealing mat 18 and cavity 45 effects have blocked the circulation of fluid of being undertaken by hole 43, thereby the pressure of lance joint upstream is increased.The corresponding increase of fluid pressure in the drilling pipe 9 like this is up to the triggering strength limit that reaches the stop device 40a with limited intensity.

After stop device 40a was opened, lance joint 14a promoted releasing device 36 under the effect of pressure fluid above the drilling pipe.Tappet 38 promotes push pipe plug 33b, hangs tube 31 thereby pipe close 33a ejected.As shown in Figure 7, when releasing device 36 arrived the middle stable position that is limited by stop device 40b, bottom tube plug 33a was discharged from and hangs tube, and the strength ratio stop device 40a of stop device 40b is big, so that allow difference to some extent when aboveground pressure is controlled.When this position, pin 57 is near ending seat 42.

As can be seen from Figure 7, after bottom tube plug 33b was discharged from and hangs tube 31, precompressed circumferential antelabium 35 was freed, and they outwards open and combine with the inwall of sleeve pipe 4.In this position, lance joint 14a opens the passage of cavity 45 bottoms, thereby pressure fluid is injected in the inner sleeve 4, and promotes bottom tube plug 33a, and the inner surface of bottom tube plug 33a scraping and cleaning sleeve pipe 4 avoids fluid to mix simultaneously.

Bottom tube plug 33a arrive formed behind the lower end of sleeve pipe 4 airtight, thereby the fluid pressure in the sleeve pipe 4 is risen, on loam cake 60, extrude the aperture, as prior art is known at closed pipe close 33a.

After pumping into the grouting fluid of aequum, the operator closes switch 24 after discharging telescopic stop device 19b, and switch 25 is opened.Drive fluid enters loop 13 and promotes lance joint 14b, upper lip 16 cleaning cavity 12 and drilling pipes 9.Lance joint 14b enters cavity 45 then and contacts with lance joint 14a, thereby starts releasing device 36 work for the second time.Drive fluid pressure constantly increases up to opening second level stop device 40b, thereby device 36 is endwisely slipped, as shown in Figure 8.Tappet 38 is discharged pipe close 33b and is hung tube 31, and each antelabium of discharging the pipe close 33b that hangs tube 31 outwards opens, as shown in Figure 9.

When this moved axially beginning, pin 57 leaned against and ends on the seat 42.Endwisely slipping of tappet 38 interrupts pin 55, and tappet 38 continues to slide, and sear 51 then remains on its axial location.Moving axially of tappet 38 causes termination 52 relative its withdrawals, thereby makes the withdrawal of pin 53 elasticity, and end parts 39 is freed from cavity volume 54 automatically.

After pipe close was discharged from fully and hangs tube, lance joint 14b opened the passage 43 on the cavity 45, thereby fluid injects inner sleeve 4 from drilling pipe and releasing tube 30, drive push pipe plug 33b.

As mentioned above, can control release away from offshore boring island place pipe close according to equipment of the present invention, lance joint delivery system is then operated on platform, and pipe close is positioned at waiting on the path position of oil well import at first.Because by effective release control of carrying out corresponding to the pressure peak that interrupts stop device 40a and 40b continuously, the release of each pipe close all can accurately be carried out.

Another advantage of this equipment is simple in structure, is easy to assembling, and its reason is that the pipe close 33 that hangs in the tube 31 is in compressive state when initial assembling, hangs the diameter of the diameter of tube 31 less than sleeve pipe 4.Eliminated the frictional force that in the traditional type assembling, is applied on the antelabium like this.

The present invention also has two advantages, and the one, the pipe close that uses in the well-digging grouting operation on employed pipe close and the ground is the same, referring to EP-A-89203297.0.The 2nd, lance joint 14 is stayed in the releasing tube 30, thus recyclable re-using.

Claims (10)

1, remote release only is used for the equipment of the pipe close (33) of sub-sea drilled wells (1) consolidation grouting, and it comprises, begins first sleeve pipe (3) to the down-hole extension from the seabed, and sleeve pipe (3) exposes the seabed; Be installed in the pipe carrier (8) on first sleeve pipe, the inner sleeve (4) that suspends in midair from pipe carrier, one is installed in the annular assembly appliance (7) on the pipe carrier, one extends upward the drilling pipe (9) that surfaces and link to each other with operation structure or platform (2) from assembly appliance, one is installed on the drilling pipe and has the delivery system (10) that at least one discharges bullet or lance joint (14), lance joint (14) is axially maintained by a telescopic stop device (19), in inner sleeve, has one at least by the static pipe close that maintains (33), it is in the arm-to-arm of waiting for that consolidation grouting lance joint triggers

It is characterized in that this equipment comprises a remote release (6), it is installed in the inner sleeve (4) and includes:

The releasing tube (30) that is communicated with inner sleeve ground, it extends downwards and coaxial with drilling pipe from assembly appliance,

Be fixed on hang tin (31) of releasing tube bottom, its cross section is less than the cross section of inner sleeve, at least one has the pipe close (33) of circumferential antelabium (35) to hang tube bottom opening and interior dress, by radial precompressed circumferential antelabium axially static the remaining on of pipe close is hung in the tube

Can in releasing tube, slide and comprise the releasing device (36) of an axial tappet (38), it matches with pipe close, piston (37) is fixed together with tappet, releasing device axially remains in the releasing tube by the limited stop device of intensity still, and under the lance joint institute applied pressure effect that arrives and move axially, described lance joint is from delivery system, when the releasing device that slides after the limited axial stroke of process, just can be discharged pipe close and hang tube in releasing tube.

2, equipment as claimed in claim 1 is characterized in that lance joint delivery system (10) comprises two lance joints (14a, 14b) at least,

Hang at least one a bottom tube plug (33a) of dress and a push pipe plug (33b) in the tube (31), they remain on the state that is in contact with one another and is stacked together still,

Releasing device (36) links to each other with the push pipe plug from the connected system (39) that gets loose by one, also has the limited stop device of two-stage intensity (40a, 40b) at least,

Releasing tube (30) also comprises the passage (43) that just in time is positioned at first order stop device top.

3, equipment as claimed in claim 2 is characterized in that the limited stop device level (40) of intensity is spaced from each other, and its axial distance equals the length of corresponding pipe close (33), and relevant with the length of lance joint (14).

4, as claim 2 or 3 described equipment, it is characterized in that being positioned at the stop device at different levels, its intensity increases to the bottom from the top along releasing tube.

5,, it is characterized in that first order stop device is positioned at apart from the top axial of releasing tube distance to equal at least on the position of a lance joint length as any one described equipment in the claim 2 to 4.

6, equipment as claimed in claim 5 is characterized in that releasing tube comprises an axial channel that is positioned between its top and the passage (43), and a cavity (45) by the slipper seal of lance joint is defined in this duct.

7, equipment as claimed in claim 2, it is characterized in that comprising that from the connector (50) that gets loose one is installed in the sear (51) in the tappet (38) slidably, it is held in place still, form a termination (52), stretching out of this termination control elasticity scalable locking pin (53), locking pin (53) is contained in the end parts (39), and end parts (39) is installed in tappet (38) and upward and with the complementary cavity volume (54) of going up formation at push pipe plug (33b) matches.

8, equipment as claimed in claim 7, it is characterized in that sear (51) comprises the outstanding pin (57) that is positioned at its top, pin (57) pass on the tappet (38) axial long hole (58) and by its guiding, pin (57) can be pressed against on the stop ring (42), and stop ring (42) forms in the bottom of releasing tube (30).

9, equipment as claimed in claim 1 is characterized in that pipe (30) is included in passage (43) and hangs the equally distributed hole that forms between the tube.

10, equipment as claimed in claim 8 or 9 is characterized in that releasing tube (30) is included in its bottom, goes up the uniform axial groove that forms ending seat ring (42).

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