AU7140200A - PBR and TEC bypass and wet disconnect/connect feature - Google Patents

Description

P/00/01i1 Regulation 3.2

AUSTRALIA

Patents Act 1990

ORIGINAL

COMPLETE

SPECIFICATION

STANDARD

PATENT

Invention Title: PBR with TEC bypass and wet disconnect/connect feature The following statement is a full description of this invention, including the best method of performing it known to us: 0 0 0000 Freehills Carter Smith BeadleMELC600371 468.7 DQKCE'0 PITI "rti¢ C- NOV. Q ,nr JVJL. ,IVLO N0.986 P.3/36 PBX MMT TFF p12RS AND WET DIM CT^ FPW^RB Backonmd of the nventio Field of the Invention The invention relates to downhole electrical connections made up in a wet environment More particularly, the invention relates to dowrhole sealed connectors which self-clean upon makeup to avoid contamination in the connection.

Prior Art Downhole power/signal wire connection/discomection has always been a problem 15 forthe industry. More specifically, because the downhole environment is extremely hostile to electric connection (salt water, fresh water, acids, etc.), it has traditionally been thought *9*e*9 that a reliable Awet connectiono could not be reliably effected. Prior art systems that :"employ connections made in the downhole environment that have bad some reliability.

Unfortunately, they are quite small and require an unlikely degree of precision when the connection is to be made 5000 feet below the surface. Therefore, although these connectors *99*."are capable of providing a good electrical connection, they fail to solve the need for .connection of an uphole string to a downhole string far below the surface. Such connections are required for the plurality of tools incorporated therein which require power 999999 and instructions.

9 9 Summary of the Tuentionr The above-discussed and other drawbacks and deficiencies of the prior art are overcome or alleviated by the wet connector/disconnector embodiments of the invention.

All of the embodiments of the invention avoid the need to stab-in a small connector.

The stabbing.-in of the tubing itself is all that is necessary to make up the connection. This is a substantial benefit to the art in view of the growing use of electrically activated downhole tools. The invention ensures reliability of such systems due to an increase in the NOV. 2.2000 9:59 B O BAKER OIL TOOLS NO.986"" P.4/36 likelihood of connection and a reduction in the care needed to effect the connection.

Most of the embodiments of the invention employ an insulator that protects a conductor installed with the dowuhole equipment. The inslator may be rubber, plastic, metal, a grease, etc. with the joining principal being to maintain the conductor in a very clean condition. Additionally, some of the embodiments further include a hydraulic fluid wash to ensure the conductor does not become contaminated when the insulator is pierced or otherwise removed by the string/connector being stabbed in. Generally, the conductor on the stab-in tool is also protected by one or more of the insulators noted above, Other embodiments do not employ conductor insulators on the downhole string but rely upon a cleansing action of the uphole string upon stab-in to remove any debris or oxidation that may have accumulated on the downhole conductors.

With each of the embodiments of the invention, the process of stabbing in causes certain events to occur which lead to secure reliable connections.

In addition to the ability to wet connect, the invention further allows for a wet 0 15 disconnect and reconnect by providing a means for leaving a portion ofthe uphole string connected to the downhole string. More particularly, the connection made during stabbingin is not disturbed. Rather a piece of the uphole section, which itself provides a new insulated conductor (or not insulated) far a subsequent stab-in procedure, is left behind.

Thus, in the event that the uphole section of string needs to be pulled, a reconnection may be made at a later time in the same manner as the original conductor mating. In order to be able to leave a section downhoIe, a switch section must also be employed to break the connection with the upper string. The switch section must break the connection in a sealed environment to prevent a short circuit upon reconnecting the uphole string.

The above-discussed and other features and advantages of the present invention will 25 be appreciated and understood by those skilled in the art from the following detailed description and drawings.

Nnv on I00 ooo.

8 JW Bo- HFL. OIL IOLS NO. 986 P.5/36 Briefflescrinnon of the Drawing Rfering now to the drawings wherein like elements are numbered alike in the several FIGURES: FIGURE 1 is a schematic elevation view of the concept of the invention; FIGURE 2 is an enlarged view of a specific embodiment for circumscribed portion A of FIGURE 1; FIGURE 3 is an enlarged view of an alternte specific embodiment for circumscribed portion

A;

FIGURES 4A and 4B are a top and bottom portion of an alternate connection apparatuq for the circumscribed portion A in FIGURE l in a lon-connected position; FIGURES 5A and SB are a top and bottom portion of the embodiment of FIGURE 4A and 4B in a connected position; FIGURES 6 A and 6B are disconnected and connected views, respectively of another alternate embodiment for the circumscribed section A in FIGURE 1; FIGURE 7 is another alternate embodiment for the circumscribed section A in FIGURE 1; FIGURES SA and 8B am disconnected and connected views respectively of another alternate embodiment for the oircumscribed section A in FIGURE 1; FIGURES 9A and 9B are an embodiment of the circamscribed area B in FIGURE 1; FIGURES 1OA-C are various positions of an alternate embodiment of the circumscribed section B in FIGURE 1; FIGURES I 1-13 are an elongated quarter-section view of the tool of this embodiment of the invention to illustrate the disassembled condition; FIGURES 14-17 are together an elongated quarter-section view of another connector tool of the invention; FIGURE 18 is a cross section view of the portion of the invention illustrated in FIGURE 11 taken along section line 15-15; and FIGURE 19 is a cross section view of the portion of the invention lflustrated in FIGURE 12 taken along section line 16-16, a a. *a a a a a NOV. 2.2000 10:00AM BAEOITOL BAKER OIL TOOLS N0.986- P.6/36 Detailed DeSerindon of the Pre.feredBmbndim~t Referring to FIGUTRE 1, a schematic illustration is provided to teach the concept of the invention in its broadest sense without details on the specific mechanisms Of Operable models. It will be understood that many different embodiments are possible which are capable of being employed to effect the broad concept of the invention. Some embodiments preferred by the inventors hereof are described in detail hereunder referencing FIGURES 1-10 which depict them. Each of the FIGURES following FIGURE 1 illustrate small sections of FIGURE 1 to teach one of skil in the art a way of connecting or disconnecting the circumnscrib~ed areas A or B of FIGURE!1. It is also to be appreciated that in many instances in this specification reference is made to "electrical connectors"; this terminology is for exemplary purposes only and it is intended that the reader understand that other conductors such as fiber optic conductors could also be employed.

The broad concept of the invention begins with the premise that a lower section of weilbore has been completed with a tool string 12 having one or more electrically actuated 7 15 or controlled tools which may have sensors, etc. This lower section 12 is for any number of reasons, which are known to those of skill in the art, isolated from an upper section of tubing string 14. For this reason a means of providing an electrical connection between the upper section 14 and lower section 12 is needed. As noted above, such connections have been difficult in the prior art because of the harsh dowahole environment, The invention,.

20 therefore, provides a system for such connection by excluding the downhole fluids from the section 12 conductors (or cleaning them) and ensuring that contaminants do not become introduced thereto during connection. Lower section 12 includes embedded wires 16 which are connected at the factory to conductor pads 18. Conductor pads 18 are generally embedded in the tubing and will include a seal thereover to prevent contamination. Lower section 12 is run in the hole or otherwise disposed downhole in this condition and will remain in a sesled condition with respect to the pads 18 until an upper section 14 is run in the hole to make a connection with pads 18. Exactly how the pads are connected is discussed hereunder, It will be appreciated in the FIGURE 1 illustration that another distinct part is illustrated between lower section 12 and upper section 14. This is reconnect section Reconnect section 20 is optional to operability of the system with respect to the original connection. It should be appreciated from a review of FIGURE 1 that the features of lower NOV. 2.2000 10:00FAM BAK<ER OIL TOOLS NO.986 P.7/36 section 12 are duplicated in reconnect section 20. Thus, it will be understood that upper section 14 might only contain features sufficient to mate with lower section 12 and avoid reconnect section 20. In a preferred embodiment, however, reconnect section 20 is included. The section allows for the original connection to remain intact if the upper section 14 is pulled for some reason. This prevents contamination of the conductor pads 18.

By way of explanation once the conductor pads 18 are freed from the insulation that protects them (in this type of embodiment) by the action of stabbing in the uphole section, they are left unprotected from the elements. With the upper section attached, no environmental fluid can contact the pads. If the upper section is pulled however, the conductors would be subject to attack by wellbore fluids. Reconnecting to these conductor pads would be unlikely to succeed. For this reason reconnect section 20 is employed, continuing now with the discussion of section 20, the section includes a disconnect for the wires in the upper section 14 so that the termination of electrical continuity caused by the pulling of section 14 does not allow a Alive@ connection to contact downhole fluids. This is 15 important to prevent damage to downhole electrical tools or destruction of the system upon reconnect. The disconnection area is schematically illustrated by circumscribed area B in FIGURE 1.

Reconnect section 20 is solely provided to create a stacked system capability. More specifically, reconnect section 20 is connected at the factory to the upper section 14 with a 20 shearable or otherwise releasable connection to upper section 14. In the event upper section 14 must be removed from the hole, it leaves in its wake, reconnect section 20 which includes new sealed connector pads 18' and wires 24 which connect to the original stab in connectors 26. A subsequent upper section may then be stabbed into the reconnect section with the same reliability as the original connection the concept of the reconnect section may 25 be employed over and over again as many times as a disconnect and reconnect are necessary. The reconnect sections simply continue to stack up as strings are pulled and reconnected.

Turning now to specific mechanisms of the invention, circumscribed area A is discussed first and is directed to several embodiments for creating a clean electrical connection with reliability and high confidence, In these FIGURES only the connection mechanism is illustrated. It is to be understood that the mechanism is part of section 14 or section 20 as desired, Following the discussion of area A, circumscribed area B is NOV. 2.2000 10:00PM EREOITOL BAKER OIL TOOLS NO.986 -*P.8/36 discussed. Area B is directed to embodiments for breaking the connection with the wires 22 Of section 14 when that section is pulled, Referring to FIGUMB 2, a cover 30 illustrated herein as plastic but which may be rubber or metallic is positioned in a sealed relationship over conductor 18. Thus, while this Portion of lower section 12 is exposed to weilbore fluid, the conductor is is protected. The connection mechanism which is shown in place after run in but before actuation, includes a bore 34, preferably filled With hydraulic fluid 30 (or similar). A wedge 38 is provided in the bore 34 which is driven like a piston Preferably by pressure from a proximate or remote source into contact with electrical connector 40 connected with wire 4 from the upper section. Electrical connector 40 includes a ramped surface 46 and a punch 48. Ramped surface 461is complemenay to wedge 38 and connector 40 is urged thereby toward seal material 42. Continued urging of connector 40 results in Piercing of' seal 42. Upon the Piercing of seal 42, fluid 36 escapes from bore 34, flooding the area between seal 42 and seal 30. The flooding action displaces weilbore fluids and provides a clean dielectric a 15 embodiment in which the connection can be made. Continued urging of connector causes the Punch 48 to Pierce seal 30 and come into electrical contact with conductor pad 18. It should be noted that fluid 36 maY Preferably be dielectric fluid or a dielectric grease, The grease is preferred due to its viscosity and therefore its tendency to remain around thle connection.

20 Referring now to FIGURB 3, an alternate connection mechanism is illustrated. This mechanism, it will be appreciated, is very similar to the embodiment of FIGURE 2 and merely adds seals 50 which are preferably chevron type seals. For clarity, the other parts of a.....this embodiment, though slightly different in Sorae respects are numbered identically to FIGURB 2. The FIGURE 3 embodimet provdes additional, if redundant, assurance of the continued cleanliness of the connection area. Seals 50 do not allow fluid topass in either direction whereas seal 50' allows fluid to pass in only the Acute direction relative to the space defned by seals 50, 50'. Thus, the movement of the cleansing fluid 36, which ini this embodiment is preferably hydraulic fluid, will sweep all remants of well fluids out of the connection space and Provide a Olean connection area, Referring to FIGURES 4A, 4B and 5A, 5B another alternate embodiment of the invention is illustrated. Because ofte relative complexity of the embodiment, it is illustrated in both a nonconnected and connected form, FIGURES 4A, 4B and 5A, SNOV. 2.2000 10:01AM BAIKER OIL TOOLS NO. 986 P.9/36' respectively, Referring first to FIGURES 4A and 4B, lower section 12 will provide a reference.

This embodiment functions by sliding the upper section, or reconnect section if so equipped, relative to the lower section 12 against spring biased rings which cover the conductor pads. Lower section 12 of this embodiment includes spring 60 based upon land 62 which biases ring 64 to a position where it covers pad 18. Section 12' also includes preferably two o-rings 66, which seal against ring 64, and a wiper 68. Section 14', or 20' if so equipped, includes spring 70 which rests on spring stop 72 and biases ring 74 to a position covering conductor pad 76. Ring 74 is sealed over conductor pad 76 by o-rings 78 mounted in ring 74. Conductor pad 76 is prefeiably spring loaded by springs 80 so that it will be biased against conductor pad 18 when so positioned.

An astute reader, skilled in the art, will recognize that there is a volume 82 that likely is contaminated, and that this volume might be problematic to the connection even in iew of wiper 68. To eliminate this possibility, the inventors hereof have provided an I 15 enclosed hydraulic fluid reservoir 84 which opens via a rupture disk 86 to volume 82. A piston 88 is provided which is operably connected to reservoir 84 and positioned such that :I the Asliding paste of this embodiment as discussed above causes piston 88 to move into reservoir 84 increasing pressure therein until rupture disk 86 fails and hydraulic fluid is expelled into volume 82. The hydraulic fluid will displace any wellbore fluids in the volume 82 and render the area clean.

In operation, piston 88 lands on ring 64 and expels the hydraulic fluid as discussed Once piston 88 is fully depressed into the bore of reservoir 84, shoulder 90 begins to urge •ring 64 downhole by over coming the bias of spring 60. Next, ring 74 comes into contact with shoulder 92 of section 12' and is urged uphole by overcoming the spring 72 with 25 downhole movement of the upper section or the reconnect section as the case may be.

Conductor pad 76 is uncovered at the time it reaches wiper 68 and is wiped clean to remove any oxidation that may have developed over time. Continued downhole movement of the uphole section aligns conductor pads 18 and 76 and the connection is complete.

FIGURE 5A and 5B illustrate this embodiment in the connected condition to promote understanding of the invention.

Referring now to FIGURES 6A and 6B, yet another alternative mechanism for the circumscribed area A in FIGURE is llustrated. The lower section of the drawing is an NOV. 2.2000 10:01PM

BKROITOL

BAKER OIL TOOLS NO. 986 P. 10/36 alternative configuration of section 12 and thus is identified as 12". The conductive pads also differ in appearance and thus are designated 18". The upper section 14"1 (it should be understood that the upper section of the FIGUrRE Could also be the reconnect section) includes a fluid-filled chamber ioo having an exhaust port 102 sealed by a one-way valve 103 and a rupture disk 104. The chamber 100 is sealed at its other end by seal 106. In a preferred arrangement several 0-ring seals are also supplied and are identified by 108.

Focusing on the portion of upper section 14"1 that defnes chamber 100, it will be noted that two wipers 110 are provided. One wiper would be effective but two is preferred for redundancy and better cleaning. Contact pads 112 are provided in this area and are protected by fluid 114 in chamber 100.

In use, nose 116 of section 12"1 is urged into seal 1O6 ultimately rupturing the seal.

since 0-rings 108 will prevent fluid 114 from escaping around nose 116, the fluid instead becomes pressurized. As the pressure in chamber 100 increases, burst disk 104 ruptures and fluid 114 is conveyed through the valve 103 to the tubing I.D. Since valve 103 will not 'permit fluid topass in the other direction, the connection area in the chamber 100 will remain clean. continued movement of nose 116 into chamber 100 brings pads 18" into wiping contact with wipers 110 where the conductor pads 18" are cleaned of anyoxdsta have formed thereon. The pads 18"1 then align with pads 112 and the connection is made as illustrated in FIGURE 6B.

20 In FIGURE 7 another alternative embodiment of the invention relating to circumscribed area A is illustrated. In tbis embodiment the upper section provides a connector 120 which is composed of a low temperature melt meta (obviously, melting temperature must be above well temperature at projected depth), The metal connector 120 is positioned adjacent conductor pad 18 and includes a coil 122 proximate thereto, the proximity being sufficient to melt the connector 120. As in previous embodiments, seals *134, 132 are provided and a reservoir 128 includes fluid 130 actuated by a piston 126 to flush the contact area. In this embodiment a surace actuated current or a downholc actuated current melt the connector 120 which then flows into electrical contact with conductor pad 18.

In another alternate embodiment for circumscribed Section A, referring to FIGURES 8A and 8B lower section 12 includes two conductor padls 18. The upper section of the drawing which again can be the equivalent of section 14 or section 20 in FIGURE 1 NOV. 2.2000 10:02AM BAEOITOL BAKER OIL TOOLS NO.986 P.11/36 depending upon whether a reconnect option after a pull-out is to be provided, provides a nose 130 with several seals 132 of preferably the Chevron type. Attached to nose 130 by a release mechanism, preferably a shear pin 134, is connector wedge 136 which houses a Piercing Conductor pad 13 8 in fluid 140 under seal 142. Upon downward movement of the upper section of the drawing (24 or 20) a spring 144 is urged against a ring 146 to move the same downjhoje until it contacts landing 148 of counter wedge 150. Further downward movement causes counter wedge 150 to move downhole behind connector wedge 13 6 to cause conductor pads 13 8 toPirc cover 142 and comne into contact with conductor pads 18 to complete the circuit.

As discussed above, in the event upper section 14 is removed from the hole, the connectiofnimst be broken to prevent a short circuit This is, for illustrative purposes, at the area marked B on FIGURE 1. It is important to note that just stretching the connectors to break leaves them exposed to weilbore fluids and invites short circuit. Therefore the inventors hereof have provided the following two embodiments of disconnects. It is to be understood, however, that other mechanisms for providing such a disconnect are Clearly within the scope of the invention.

Turning now to FIGURES 9A and 9B1, the first disconnect embodiment is illustrated in the connected position and the disconnected position, The disconnect itself comprises a connector pad 162 disposed a top an insulator 160 in 4 recess 172 in section 12. The recess 20 172 is seldby cover 168 which may beof a pl.urait of' di~.sttmerasolngs they either deflect or allow a sealed sliding of the pins 166 therethrougi. In the case of deflection, the pins 166 need not slide through cover 168 (the non-sliding arrangement being illustrated herein).

As one can readily ascertain from the drawings, pins 166 provide a base for pads 164, the pins extending to outside cover 168 and into connection with plate 170. The a. disconnect is connected together in the factory and appears as illustrated in FIGURE 9A.

When adisconnect is desired, pulling the tool causes the switch to be in the condition illustrated in FIGURE 9B wherein the electrical connection is broken and the ends of the downhole wires are protected within recess 172 and cover 168, It will be apparent to one of skill in the art that if upper portion 174 of the drawings is to be removed altogether the disconnect will have to shear at a point Atoy the cover 168. Alternatively, the portion 174 could simply be a ring which remains downhole.

NOV. 2.2000 10:02AM BKEOITOL BAKER OIL TOOLS NO.986 P.12/36 Referring now to FIGURES 10A, 1013 and l0C a second disconnect embodiment is illustrated. This disconnect is intended to work in mnuch the same Way that the embodiment of FIGURES 9A 9B works and thus only the distinctions are discussed here. Contact bar 180 is connected to an uphole piece of the pipe and supports actuator pin 182 and contact pins 184. Pin 182 includes a wedge 186 which is angled sufficiently to actuate slide 190 through slide pitch 188. Actuation of slide 190 mnoves it (to the right in the drawing) to align ports 192 with contact receptacles 194 wherein contact pads 196 are disposed and connected to wires 198. Once alignment as described is complete, pins 1 8 4 may come into electrical contact with pads 196 (pads 196 are insulated from the metallic tool by ingulation 200).

The length of the pins 182 and 184 is imlportant to the operation of the invention.

Upon disconnecting, it is required that the slide 190 be closed (under bias of spring 204) prior to pins 184 pulling free fRom membrane 202. By so requiring, the breach in the seal of' membrane 202 due to the pins 184 being extended therethrough is not able to allow 19 15 contamination into receptacles 194. Obviously it is intended that slide 190 make sealing contact with the surrounding area. This embodiment is made up in the factory preferably is also useablo in the field because of the ability ofpin 182 to actuate slide 190 in a time frame where the pins 184 will protectively be in membrane 202.

In yet another embodiment of the invention wherein conductors are allgned and 20 connected. Referring initially to FIGURES 11-13 a more schematic view of the invention is illustrated. The view does not contain all of the parts of the invention and thus is intended to convey the locations and orientation of the connectors, Tool 10 breaks down to o a top half (comprising FIGURES I1I and 12) and a bottom half comprising FIGURE 13.

*..When the halves are separated as illustrated in FIGURES 11-13, lower seal adapters 212 (twelve of them on the embodiment shown although more or fewer could be employed) are visible ort bottom half (FIGURE 13) and the complemnentary upper seal adapters 214 (an equal number to the number of lower seal adapters 212), Upper seal adapters 214 preferably include a pair of a-rings 270 to fluid tightly seal the lower seal adapters. Upper seal adapters 214 are connected to the uphole environment via conduits 218 while at the other end of the connection, lower seal adapters 12 ame connected to the dawnhole environment via conduit 20. The conduits 218 and 220 preferably contain fiber optic conductors. The mating ends of the conductors are cleaned by preferbly a hydraulic fluid NOV. 2.2000 10:02AM BKEOITOL BAKER OIL TOOLS NO.986 -P.13/36.

which may be applied in a number of ways including adaptations of the embodiments Preferably does not include threads between the alignment Profile and end connectionis.

Although the top and bottom Portions Of the tool are run in the hole together (assembled at the surface), an align~ment profile 222 is provided in the tool to align the top and bottom halves in the event that they are separated. Therefore, referring directly to FIGURES 12 and 13, a profile 224 is a raised area in a predetermined orientation on the anchor sub 226. The Profile 224 mates with a complemaentary profile 228 in bottom half (FIGURE 13). The profile and complementary profile operate similarly to aUcomrentionaj orientation sub which is well lknown to one of ordinary sill in the art. The orientation profiles ensure that the lower seal adapters 212 will align and mate with upper seal adapters 214 reliably.

Turning flow to the internal components of this embodiment of the invention, referring to FIGURES 14-19, and beginning at the uphole end of the tool, a box thread 230 is provided to attach the tool to a work string (not shown). The box thread 230 is cut in 15 body 232 which extends downhole to threadedly mate with anchor sub 234 at thread 236. Body 232 supports, near the uphole end thereof, disc spring retainer cap 23 8 which is threaded to the of body 232 at thread 240. Cap 238 is further preferably anchored by ca scew24. ap23 functions to reanpreferably a plurality of disc springs (belleville washers) 244. Spnings 244 absorb longitudin4l movement of upper and lower seal adapters.

Moreover, the washers keep the upper and lower seal adaptors positively shouldered internally which is important for pump down, replaceable optic fiber installation and other installations. Disc springs 244 are maintained in position at the downhole end by retainer sub 246. Sub 246 is annular and is threaded to disc spring adjustment sub 248 at thread 250.

Downhole of attachment sub 248 and radially outwardly of body 232 is upper S. -Sconnector 252. Upper connector 252 houses upper seal adapters 214 at the downhole end thereof and a line connector assembly 254 which preferably comprises a pair of ferrules and a jam nut (not individually shown). The connector 252 is retained in position on body 232 by shear screw 256 and shoulder screw 258. These latter screws are best viewed in FIGURE I18. A plurality of bores 260 are provided in upper connector 252 to receive conduit 218S. Lower connector 262 (FIGURES 15 and 19) is disposed downhole of upper connector 252 and houses lower seal adapter 212, bore 264 for conduit 220 and a control NOV. 2.2000 10:03AM BA~KER OIL TOOLS NO.986 P.43 line connector 260 Which comprises a pair of ferrules and a jam nut (not individually Shown). It should be noted that FIGUf~ proie rs eto view of the tool which Shows the upper and lower seal adapters that were explained previously herein. It should also be noted that upper seal adapter 214 includes two sets of o-rings 268 and 270. Rings 268 seal upper seal adapter 214 to upper connector 252 while rings 270 seal the lower seal adapter 212 into the upper seal adapter 214 when it is s0 engaged. Lower adapter 2 12 may be for conventional conductors or fiber optic conductors. FIGURE 19 illustrates three of four (212a) in conventional form and one (212b) in fiber optic form Bridging FIGURES 15 and 16 is sleeve 272 which covers the comnponentq nf the snap WnSna Out feature of the invention (componet discussed hereunder). Sleeve 272 is connected to seal housing 274 which includes locking dogs 276. Seal housing is also threaded at 278 for a body lock ring 280. The lock ring 280 is rotationally arrested by roll pin.236. Seal housing 274 is sealed to anchor sub 234 by seal stack 281.

Radialy outwardly of seal housing 274 (FIGURES 16 and 17) are housing 282 and 15 control line sub 284. Housing 282 includes several seals 286, several screws 288 and a dog receiving profile 290.

Radially inwardly of sleeve 272 (FIGURE 16) is the snap in/snap out assembly mentione above. The assembly includes, beginning from the uphole end, a shear ring retainer 292 which is connected to the aachor sub 234 by shear ring 294. Shear ring reanr292 is aloconnected to support ring 298 through set screws 296 and thread 300.

Support ring 298 supports set down sleeve 302 and is in contact with body lock housing 306. Body lock ring housing 306 is connected to body lock ring 304 conventionally and including a set screw 308 to arrest rotational movement. Body lock ring housing 306 is also threadedly connected to set down sleeve 302 by thread 310. Body lock ring housing 306 cannot move up or downhole because of shear screw 312 which engages anchor sub 234.

*.Body lock ring housing 306 is connected to latch 314 by parting ring 316 which is a ring having holding profiles 3 18 to retain the body lock ring housing 306 to latch 314 until a predetemined tensile load is placed thereon which breaks the parting ring 316.

In operation and after running in the hole, a pressure line 243 (FIGURE 16) pressuies a piston area 318 sealed by seals 86. Upon reaching a predetermined pressure, shear screw 288 shears and allows housing 282 to move downhole thus locating recess 290 over locking dogs 276 allowing them to move radially outwardly to disengage from anchor INOV. 2.2000 10:03AlM IE I OL BAKER OIL TOOLS NO.986 P.15/36 sub 234. Once anchor sub 23418s disengaged from the dogs 276 it will be free to move, Body lock ring 280 is provided to Prevent hawsing 282 from movnbakuhlad reseating the dogs 276. After initial setting the, the housing portion of the tool is pernenitly moved and the dogs 276 are Permanendly diengaged from anchor sub 234, Following this disengagement, the tool upper portion (FIGURES I11 and 12) and lower portion (FIGURE 13) are separable using the snap in/snap out assembly in order to develop a proper space-out for the particular well, the tool may be snapped in/snapped out as many times as necessary until sufficient weight is committed and the anchor sub 234 supports the latch 314. In this latter condition the snap out featu r i disabled.

Once the space out is appropriate, set down weight which exceeds the shear strength of shear ring 294 and shear screw 312 is applied. After shearing anchor sub 234 moves downhole through lock ring 304 and is retained in this position until retrieval is necessary or desired.

In order to retrieve the tool, a tensile load is placed on the anchor sub which fransmis to the body loc rig 304th prigrig 316 adtelatch 314. We Predtermnedtensile load is exceeded, the parting ring fails and the anchor sub 34 moves uphol1e, This unsUpports latch 314 allowing the latch to deflect into recess 320 and the snap Out sub is Operational Continued tensile load will disenage te upepotnofheol from the lower Portion for retrieval. The process as described can then be repeated with a 20 new or rebuilt upper portion.

*While preferred embodiments have been shown and esrbdvaiu modifiations and substitutions may be made thereto wvithout departing from the spirit and scope of the invention, Accordingly, it is to be understood that the present invention has been described by way of illustration and not limitation.

S it Will be understood that the term "comprises" or its grammatical variants as used herein is equivalent to the term "Includes" and is not to be taken as excluding the presence of other elements or features.

Claims (5)

1. A downhole conductor connection device comprising: a downhole portion including a lower conductor leading fIrther dowuhole and an orientation profile; an uphole portion having a conductor leading further uphole and a complementary orientation profile; at least one lower sel adapter connected to said lower conductor, and at least one upper seal adapter connected to said upper conductor, said lower seal adapter being receivable in said upper seal adapter to connect said lower conductor to said upper conductor,

CLAIM 2, A downhole conductor connection device as claimed in Claim I wherein said connection device further includes a snap in/snap out tread, CLAIM

3. A downhole conductor connection device as claimed in Claim I wherein said :device further comprises a dog support system to lock said device in a selected position, CLAIM

4. A downhole conductor connection device as claimed in Claim 3 wherein said 9 dog support system is collapsible upon pressuring control line to shift housing, CLAIM

5. A method for downhole conductor connection comprising: running a downhole and uphole connector portions in a sealed engaged condition; opening said sealed engaged connector; orientating said uphole connector with said downhole connector; and 5reengaging at least one conductor, BAKER HUGHES INCORPORATED by Freehills Carter Smith Beadle Registered Patent Attorneys for the Applicant 3 November 2000