US3545474A

US3545474A - Tool diverter and system for directing tfl tools

Info

Publication number: US3545474A
Application number: US741397A
Authority: US
Inventors: Walter Brown
Original assignee: North American Rockwell Corp
Current assignee: Boeing North American Inc
Priority date: 1968-07-01
Filing date: 1968-07-01
Publication date: 1970-12-08
Anticipated expiration: 1987-12-08

Description

O Umted States Patent 1 1 3,545,474

72] Inventor Walter Brown References Cited Long Beach, California UNITED STATES PATENTS 1 pp 741397 2,713,909 7/1955 Bakel 166/70 1 Filed July 1,1968 3,047,020 7/1962 Barrett, Jr. 137/610X I 1 Patented Dec-8,1970 1 3,199,537 8/1965 Swanson l37/6lOX 1 Aeeignee America" Rockwe" 3,396,789 8/1968 Dean l66/70X Primary Examiner-William R. Cline I 54] TOOL DIVER-PER AND SYSTEM FOR DIRECTING Attorneys-William R. Lane and L. Lee Humphries TFL TOOLS 1 18 Claims Drawmg ABSTRACT: Apparatus for operation in a system using TF L [52 U.S. Cl 137/610, h g the flewline) tools, wherein it is desirable to ir 166/70 the tool into one of a plurality of paths. To divert the tool, a [51 1 Int. Cl. E2lb 23/00; rotatable m r i p i which i pa l f lining p an F16k 1 1 /()0 inflow tube with one of a plurality of outflow tubes depending [50] Field ofSearch 137/610, p its rotated p i n A n m r f u h fle r on 608 625,46; 166/7() 7 5, I5 3 156; nected in series, and remotely actuated, can automatically 15/ |04,()6 A direct a TFL tool into a selected one of a plurality of wells.

ACTUAIUR PATENTEU DEC 8 I970 SHEET 1 OF 5 ACTUKI'OR FIGJ ATTORNEY PATENTEU DEC 8 I970 SHEEY 2 OF 5 INVENTOR. WALTER BROWN 7 ATTORNEY PATENTED DEC 8 19m SHEEI 3 [IF 5 INVENTUR. WALTER BROWN ATTORNEY PATENTEDHEB 8|97U 3545474 SHEET U 0F 5 INVENTOR.

WALTER BROWN ATTORNEY PATENIEUDEI: 8 mm T0 FLOW LINE coumacron INW-FNW WALTER BROWN ATTORNEY TOOL DIVERTER AND SYSTEM FOR DIRECTING TFL TOOLS BACKGROUND OF THE INVENTION .1 Field of the Invention The present invention relates to a system including a tool diverter for guiding a TFL tool into one of a plurality of tubing outlets associated with a plurality of wells or well completions, and more particularly to a remotely controllable tool diverter which when connected in series is capable of utilization in an automated system for servicing a plurality of wells or well completions.

2. Description of Prior Art In recent years the drilling of offshore wells has gained increasing prominence consonant with the desire to maintain and expand the countrys gas and oil reserves. In order to effect maintenance and other operations on such wells wherein the wellhead assembly may be positioned a considerable distance below the surface of the water, various methods have been developed. One of these methods utilizes so-called through the flowline (TFL) tools for performing a variety of functions such as scraping paraffin, setting plugs, etc. When combined with pistons, these TFL tools are pumped down" into a well through the production line by pressurizing the production line above the tool. Later, the tool is pumped up again by pressurizing the lower end of the production line through a service line (sometimes called the TFL fluid line). Because these tools consist of a chain of parts, the conducting tubes and path directing diverters have to provide a straight through or a slightly curved passage which avoids abrupt changes of direction. The TFL system thus described is known and forms no part of the instant invention. The purpose of a tool diverter is to channel TFL tools which are pumped from one station (above the water or in an underwater pressure vessel) into one of two or more tubing lines leading to two or more different wells or to different oil sands in one well.

Prior diverter designs have required either that a diver descend to the diverter position and orient it to the required setting or else they have required that a special setting tool be pumped down from the surface and returned. Further, prior diverters have not been suited to serial connection allowing the conduction of a TFL tool to a selected one of many wells. Such a capability is necessary in a system designed to effect periodic, automatic servicing of a plurality of wells.

SUMMARY OF THE INVENTION Briefly stated, the invention contemplates apparatus for channeling TF L tools. The apparatus comprises a casing having an inflow tube connection and a plurality of outflow tube connections. Located within the casing is a rotatable portion whose function is to line up, the inflow terminal with one of a plurality of outflow terminals, the various outflow terminals being connected to tubes leading to different wells or well completions. In a first embodiment of the present invention, the rotatable portion comprises a conducting tube with curved center line extending at the inflow end straight in the direction of the axis of rotation and curved away from it at the outflow end. In a second embodiment of the instant invention, the rotatable portion comprises a plurality of conducting tubes each oriented to connect the inflow terminal with a different outflow terminal depending upon which conducting tube is alined with the inflow terminal. The rotatable portion in each instance is secured to a drive shaft which may typically be driven by a hydraulic or electric actuator which may be remotely controlled to guide a TFL tool into one of two or more selected tubing outlets in a programed manner.

The invention further contemplates connecting a plurality of tool diverters in a serial manner allowing the guidance of a TFL tool into one of a large number of selected tubing outlets thereby providing the capability of servicing numerous wells or well completions with a single tool. A number of diverters switched in series may be located inside of a pressure proof vessel located on the oceans floor where repair and adjustment work may be carried out under atmospheric conditions. However, each diverter represents a self-contained unit and with pressure proof actuators could be exposed to a subsea environment and would, therefore, not necessarily require a pressure proof vessel.

The configurations rendered feasible by the instant invention are further particularly suited to a general arrangement which located all TFL tool holders, all TFL control equipment, as well as the control equipment for the production line, gas line, and TFL fluid line on an above sea platform with one each line leading to an interim pressure vessel located on the sea bottom to which a large number of underwater wells are connected. This arrangement makes most equipment requiring frequent adjustments easily accessible on the platform, but

cuts down on the vulnerability of a large number of lines near the water surface. In this configuration, the interim pressure vessel would contain the switching equipment which would direct the TFL running tool (coming in from the platform) to one of a multiplicity of wells.

OBJECTS It is therefore an object of this invention to provide a novel TFL tool diverter.

It is a further object of the invention to provide a system for remotely directing TFL tools, pumped from an underwater pressure vessel, or a surface station, to one of two or more production lines coming from one of two or more formations of a multicompletion well or one of two or more wells.

It is still a further object of the present invention to provide a simple device which can be remotely actuated to guide a TFL tool into one of two or more selected tubing outlets.

It is another object of the present invention to provide a simple device which can be arranged in series and which can be remotely actuated to guide a TFL tool into one of two or more selected tubing outlets to service a plurality of underwater wells or well completions.

Still other objects, features and attendant advantages of the present invention will become apparent to those skilled in the art from a reading of the following detailed description of several embodiments constructed in accordance therewith taken in conjunction with the accompanying drawings and wherein:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially exploded perspective view of a tool diverter constructed in accordance with the present invention, with a portion thereof broken away to show a plurality of conducting tubes adapted to guide a TFL tool into one of a plurality of selected tubing outlets.

FIG. 2 is a partial section, partial elevational view of the tool diverter of FIG. 1 with one of the curved conducting tubes alined with a tubing outlet.

FIG. 3 is a cross-sectional view of the tool diverter of FIG. 2, as seen along broken line 33 of FIG. 2.

FIG. 4 is a cross-sectional view of the tool diverter of FIG. 2, as seen along broken line 4-4 of FIG. 2.

FIG. 5 is a top plan view of the tool. diverter of FIG. 2.

FIG. 6 is a partial section, partial elevational view, as seen along broken line 6-6 of FIG. 5.

FIG. 7 is a cross-sectional view, as seen along broken line 7-7 of FIG. 2. i

FIG. 8 is a cross-sectional view, as seen along broken line 8-8 of FIG. 2.

FIG. 9 is a partial section, partial elevational view of a second embodiment of a tool diverter constructed in accordance with the present invention, with the conducting tube oriented to connect the inflow tube to one of a plurality of selected tubing outlets.

FIG. 10 is a cross'sectional view, as seen along broken line 10-10 of FIG. 9.

FIG. ll is a bottom plan view of the tool diverter of FIG. 9.

FIG. 12 is a cross-sectional view, as seen along broken line 12-12 of FIG. 9. FIG. 13 is a schematic diagram of a diverter system configuration in which a plurality of tool diverters of FIG. 9 are serially connected so as to direct a TFL tool into a selected one of a large number of wells or well completions.

FIG. 14 is a schematic diagram of a diverter system configuration in which a plurality of tool diverters of FIG. 1 are serially connected so as to direct a TFL tool into a selected one of a large number of wells or well completions.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to FIGS. 1-8, a first embodiment of a tool diverter constructed in accordance with the instant invention is illustrated. A rotatable

portion comprising disks

4 and 5, spaced by shaft 9, straight conducting tube 6 and curved conducting

tubes

7 and 8 are contained within a housing 1. Housing 1 has a head 2 on the inflow end, a flange 12 and a cover 3 on the outflow end. The inflow end is connected to inflow tubing 1 arranged at a distance from the housing center line. The outflow end contains three outflow ports V, VI, and VII, of which port VI is in straight line extension of port I, ports V, and VII either side of port VI.

The

curved conducting tubes

7 and 8 have a center line following a circular arc large enough to accommodate the anticipated TFL tool. For modern TFL tools, a five foot radius is sufficient. Alternately, the deflector bodies may have bores following a polygonal center line. The rotatable portion is journaled round trunnions l and 11 and can be rotated to three positions which provide a connection of input I with either outputs V, VI, or VII as will be more fully described later.

Gaskets 13 and packing 18 seal the pressurized tool track from the space inside housing 1. Gear segment 14 is secured to shaft extension 10. Gear segment 14 combs with gear 15 which is secured to drive shaft 16, driven by a hydraulic or electric actuator M or other suitable drive. Shaft 16 is journaled in bearings 22 which are fastened to cover 2. The movement of gear segment 14 is limited by stops 17 which are secured to inflow side head 2. In order to function properly, it is required that the rotatable part, if rotated from one position to the other, lines up the bores exactly. In straight through position, opening IX lines up with I and opening III with VI. If deflection from I to V is required, opening X lines up with I and II with V. Deflection from I to VII is produced by lining up I with VIII and IV with VII.

A pin 19 with rounded head, secured to rotor flange 5, actuates one of three plunger switches 21 which are in contact if the rotor is lined up in the three described positions. Depressions 20 may be utilized to assure alignment. For example, they may be in line with a ball under spring pressure (not shown) to hold the rotatable portion in exact alinement.

In operation, the TFL tool coming from a remote station will arrive at inflow connection I and be guided to one of the outflow connections V, VI or VII by the position of the rotatable part. The rotation is effected by an electric or hydraulic motor or actuator M driving drive shaft 16. Motor M may typically be started by remote control by any of a number of means well known in the art. Rotation is stopped by pin 19 actuating switch 21. The same switch may also actuate a remote control position signal which indicates to a remote operator that the tool deflector has rotated to a new position. If continuation of rotation is required, a second remote control signal may initiate rotation again.

Referring now to FIG. 14, there is illustrated a system incorporating a number of tool diverters of FIG. 1 serially connected so as to service a plurality of wells. A TF L tool arriving from flowline connecter 85 is directed by diverter 91 either to one of two wells or to diverter 92 depending upon the prior remotely controlled setting of diverter 91. Diverters alignment. 96 operate in a like manner. Six diverters capable of servicing 13 wells are illustrated, although theoretically any numberof diverters may be connected in series, the choice to depend upon total system considerations. The system of FIG. 14 may preferably be contained within a pressure proof underwater vessel where repair and adjustments may be carried out under atmospheric conditions.

Referring now to FIGS. 9l2, there is illustrated a second embodiment of a tool diverter constructed in accordance with the principles of the instant invention. A two position, three connection tool diverter 70 with curved conducting tube 34 is illustrated. Housing 31 with flanged ends 32 and 33 surround a rotatable part which comprises curved conducting tubing 34 with curved center line extending at the inflow end straight in the direction of the axis of rotation and curving away from it at the outflow end. Tubing extension 35, surrounded by packing 40, rotates inside of cover 32. Disc 36 contains a trunnion 37 in axial extension of tubing extension 35. This part is sealed against the housing by packing 40 and seal 41. A gear 38 surrounds cylinder 35. Split disk 39 is clamped by spacer 48 between housing 31 and cover 32. The inner bore of disk 39 fits loosely into the turned neck of cylinder extension 35 which allows rotation but prevents axial movement. Gear 38 cams with pinion 45. Actuation drive shaft 44 may be driven by a hydraulic or electric motor or actuator, in a manner as previously described with respect to the prior embodiment, to turn the rotatable part.

As may be seen with particular reference to FIG. 11, rotation of tubing extension 35 is contemplated, moving the outflow either to position 42 or to position 43, although any other suitable amount of rotation may be chosen.

Movement of the rotatable part is limited by pin 46 running into stop lugs 47 or 49. Pin 46 is secured to disk 36 and lugs 47 and 49 are part of the housing 31, pin 46 actuates plunger switches 51 and 52 to operate a position signal and stop the actuation movement. The curved tubing 34 is stiffened by web 50.

Referring now to FIG. 13, there is illustrated a system utilizing a plurality of tool diverters of FIG. 9 serially connected so as to service a large number of wells. A TFL tool coming from either a surface platform, or a tool holder on the oceans floor, will arrive at the inflow side of tool diverter 71 via flowline connecter 65. Tool diverter 71 is positioned by remote control to direct the TFL tool either to the first well or to tool diverter 72, the next tool diverter in line. Tool diverter 72 operates in the same manner as do the remaining diverters 73-81. As illustrated in FIG. 13, ll tool diverters are arranged to allow tool diversion to 12 wells or well completions. Although 11 tool diverters are illustrated, it is to be understood that any number may be serially connected in a like manner, the choice to depend upon total system considerations. The system of FIG. 13 may also preferably be contained within a pressure proof underwater vessel.

It is to be noted that the tool diverters of the instant invention are of fairly simple construction and are particularly susceptible to inclusion in an automated system where it is desired to effect well maintenance in a predetermined and systematic manner.

While the invention has been described with respect to several physical embodiments constructed in accordance therewith, it will be apparent to those skilled in the art that various modifications and improvements may be made without departing from the scope and spirit of the invention. Accordingly, it is to be understood that the invention is not to be limited by the specific illustrative embodiments but only by the scope of the appended claims.

Iclaim:

1. Apparatus for switching TFL tools into a selected one of a plurality of running lines comprising in combination:

a housing with an inflow tube connection at one end and a plurality of outflow tube connections at the opposite end;

rotatable means located within said housing and having a pair of spaced parallel disks connected together and at least one connecting tube connected between said disks for connecting said inflow tube connection with a selected one of said plurality of outflow tube connections depending upon the rotated position of said rotatable means;

said disks being disposed to rotate about an axis normal to the discs; and

rotation means connected to said rotatable means for rotating said rotatable means about said axis.

2. The apparatus of claim 1 wherein said inflow tube connection is positioned at a distance from said housing centerline.

3. The apparatus of claim 2 wherein:

a shaft is disposed on said axis and connects said discs; and

the number of said conducting tubes is equal to the number of said outflow tube connections and said tubes are positioned so that, when the tube opening near said inflow tube connection is alined therewith the opening of the respective tube near said outflow tube connections is also alined with a respective one of said plurality of outflow tube connections.

4. The apparatus of claim 3 wherein said rotation means comprises:

a drive shaft connected to said rotatable means; and

remotely controllable actuator means for driving said drive shaft to cause rotation of said rotatable means.

5. The apparatus of claim 4 further comprising: means cooperatively associated with said rotation means for stopping the rotation of said rotatable means when the opening of one of said conducting tubes is alined with said inflow tube.

6. The apparatus of claim 5 further comprising: means for sealing said conducting tubes from the remaining space inside said housing.

7. The apparatus of claim 6 further comprising: means for holding a selected one of said conducting tubes in exact alinement with said inflow and outflow connections.

8. The apparatus of claim 6 wherein said last named means comprises:

a plurality of depressions in said casing; and

a ball under spring pressure, said ball being alined with a selected one of said depressions when a selected one of said conducting tubes is alined in its corresponding outflow connection.

9. The apparatus of claim 8 further comprising: means responsive to said rotation stopping means for remotely indicating the position of said rotatable means.

10. A plurality of apparatus as claimed in claim 5 wherein: said plurality of apparatus are serially alined with one of said plurality of outflow tube connections of each apparatus connected with the inflow tube connection of the next apparatus in the series so as to provide multiple switching paths for said TFL tools.

11. The apparatus of claim 10 wherein said serial arrangement of said plurality of apparatus is in a substantially linear configuration.

12. The apparatus of claim 1 wherein:

said inflow tube connection is disposed on said axis;

said conducting tube is curved and its curved center line at the inflow end is tangent to the center line of the inflow tube connection and curves away from the axis of rotation at the outflow end; and

the outflow end of the connecting tube is alineable with a selected one of said outflow tube connections depending upon the rotated position of said rotatable means.

13. The apparatus of claim 12 wherein said rotation means comprises:

a drive shaft connected to said rotatable means; and

remotely controllable actuation means for driving said drive shaft to cause rotation of said rotatable means.

14. The apparatus of claim 13 further comprising: means cooperatively associated with said rotation means for stopping the rotation of said rotatable means when the outflow end of said curved conducting tube is alined with one of said plurality of outflow tube connections.

15. The apparatus of claim 14 further comprising: means responsive to said rotation stopping means for remotely indicatiqglthe position of said rotatable means.

16. e apparatus of claim 15 further comprising: means for sealing said conducting tube from the remaining space inside said housing.

17. A plurality of apparatus as claimed in claim 12 wherein said plurality of apparatus are serially alined with one of said plurality of outflow tube connections of each apparatus connected with the inflow tube connection of the next apparatus in the series so as to provide multiple switching paths for said TFL tools.

18. The apparatus of claim 17 wherein said serial arrangement of said plurality of apparatus is in a substantially circular configuration.