US20120012335A1 - Sealing adapter for well tubing head - Google Patents
Sealing adapter for well tubing head Download PDFInfo
- Publication number
- US20120012335A1 US20120012335A1 US12/835,349 US83534910A US2012012335A1 US 20120012335 A1 US20120012335 A1 US 20120012335A1 US 83534910 A US83534910 A US 83534910A US 2012012335 A1 US2012012335 A1 US 2012012335A1
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- United States
- Prior art keywords
- annular sleeve
- sleeve insert
- locking pin
- radial
- extendable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 238000007789 sealing Methods 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 11
- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims 8
- 230000004888 barrier function Effects 0.000 abstract description 10
- 230000000153 supplemental effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 22
- 238000010276 construction Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
Definitions
- the present invention relates generally to barrier systems for wells, and more particularly, to a barrier system adapted to provide secondary protective sealing for a tubing head operatively engaging an oil or gas well.
- fracturing It is well known to increase production from oil and gas formations by so called “fracturing” to increase the permeability of the production zone.
- fracturing involves pumping pressurized fluids through perforations in a well casing into a production zone in order to break or fracture pores in the production zone.
- fracturing fluids are pumped under very high pressures of about 5,000 to 10,000 psi through the perforations into the formation. The high pressure breaks the formation to form flow channels for hydrocarbon fluids.
- Oil and gas wells are typically provided with a production tubing head (also known as a tubing spool) which serves as a connection for the fracturing equipment as well as for the introduction tubing or other equipment into the well interior during production.
- a production tubing head also known as a tubing spool
- the well typically has a substantial positive pressure as hydrocarbons seek to exit from the production zone.
- tubing hangers are considered generally desirable due to the ease of use and ability to maintain full bore access by removing the hanger.
- tubing hangers may be susceptible to damage and/or may permit a pressure leak when subjected to high pressure over extended periods following the fracturing operation.
- a supplemental tubing head barrier that may be adapted to function with existing tubing head constructions to provide additional sealing protection without unduly limiting access to the tubing head interior would be desirable.
- the present invention provides advantages and alternatives over the prior art by providing a tubing head adapter which operates to provide a supplemental sealing barrier for a tubing head while maintaining access to the interior of the tubing head.
- the present invention also provides a dual barrier stack-up completion that allows removal of the fracture stack and production tree installation with dual barriers between produced hydrocarbons and the atmosphere.
- the present invention provides an adapter for disposition in sealing relation to a tubing head operatively connected to a hydrocarbon well.
- the adapter includes an annular body adapted to be secured in fixed relation to the tubing head.
- the annular body includes an axial channel, a first set of radial locking pin channels extending radially away from the axial channel and at least a second set of radial locking pin channels extending radially away from the axial channel.
- the second set of radial locking pin channels are axially spaced from the first set of radial locking pin channels.
- the adapter further includes a dummy hanger adapted to be matedly inserted into the axial channel.
- the dummy hanger includes an annular sleeve insert having a central bore and a removable axial plug disposed within the central bore.
- the annular sleeve insert includes a plurality of pin receiving channels extending radially through the annular sleeve insert for aligned relation with the first set of radial locking pin channels.
- a first set of extendable and retractable locking pins are disposed within the first set of radial locking pin channels.
- the first set of extendable and retractable locking pins includes distal ends adapted to project through the pin receiving channels in the annular sleeve insert to engage the axial plug.
- a second set of extendable and retractable locking pins are disposed within the second set of radial locking pin channels.
- the second set of extendable and retractable locking pins include distal ends adapted to engage the annular sleeve insert.
- a first compressible seal is disposed circumferentially about the annular sleeve insert.
- At least a second compressible seal is disposed circumferentially about the annular sleeve insert in axially spaced relation from the first compressible seal.
- At least a third compressible seal is disposed circumferentially about the axial plug.
- At least a fourth compressible seal is disposed circumferentially about the axial plug in axially spaced relation from the third compressible seal.
- FIG. 1 is a side sectional view of an exemplary tubing head with a tubing hanger in place and with an exemplary sealing adaptor consistent with the present disclosure in place across the tubing head with a dummy hanger sleeve and axial plug removed;
- FIG. 2 is a side sectional view of the exemplary sealing adapter of FIG. 1 showing the dummy hanger annular sleeve insert and axial plug in place;
- FIG. 3 is a sectional plan view taken generally through line 3 - 3 in FIG. 1 showing an exemplary positional arrangement for locator pins and locking pins holding the dummy hanger annular sleeve insert and axial plug in place;
- FIG. 4 is a side sectional view of an alternative embodiment of the invention providing a unibody tubing head and sealing adaptor with a tubing hanger in place in the tubing head portion with a dummy hanger sleeve and axial plug removed.
- a production tubing head 12 (also referred to as a tubing spool) is shown with a tubing hanger 14 in place within the axial bore 16 of the tubing head 12 .
- the tubing head 12 is operatively connected to a well casing (not shown) in a manner as will be well known to those of skill in the art.
- the tubing head 12 may include a connection leg 18 for attachment of fracturing equipment or the like.
- the connection leg 18 may be sealed by use of an isolation valve 20 and a flange seal 22 .
- the tubing hanger 14 in combination with the isolation valve 20 and the flange seal 22 act to provide primary sealing of the production tubing head 12 .
- other primary sealing arrangements may be used if desired.
- the production tubing head 12 has a circular spool shape and includes a lower attachment flange 26 as well as an upper attachment flange 28 .
- the lower attachment flange 26 and the upper attachment flange 28 each typically includes a multiplicity of bolt holes arranged circumferentially about the perimeter outboard from the axial bore 16 . Connection bolts may be run through the bolt holes to permit attachment of other structures at either end of the production tubing head 12 .
- a sealing adapter 30 may be operatively connected across the upper attachment flange 28 .
- the sealing adapter 30 acts to provide a secondary sealing barrier for the production tubing head 12 when fracturing operations are complete.
- the sealing adapter 30 also provides protection for the tubing hanger 14 .
- the sealing adapter 30 includes an annular body 32 which may be mounted in fixed relation across the upper attachment flange 28 of the production tubing hanger 12 by use of attachment bolts 34 ( FIG. 2 ) extending downwardly for engagement with complementary bolt holes arranged circumferentially about the upper attachment flange 28 .
- the annular body 32 may be formed from cast steel or other suitable metal, although non-metallic materials may also be used if desired.
- the annular body 32 may be secured in place by nuts 36 which engage the attachment bolts 34 .
- attachment bolts 34 typically will be disposed circumferentially about the annular body 32 for connection using complementary nuts.
- one such exemplary pattern is illustrated in FIG. 3 .
- attachment bolts 34 may also extend outwardly from an upper surface of the annular body 32 for attachment to additional structures (not shown).
- the annular body 32 includes an axial channel 40 for disposition in substantial alignment with the axial bore 16 of the production tubing head 12 .
- the neck of the tubing hanger 14 may project upwardly into the axial channel 40 .
- the annular body 32 also includes an arrangement of radial channels for mounting extendable and retractable pins.
- a first radial locator channel 42 and a second radial locator channel 44 are disposed in opposing relation to one another on either side of the axial channel 40 .
- the first radial locator channel 42 is adapted to hold a first locator pin 46 which may be extended and retracted radially relative to the axial channel 40 .
- the second radial locator channel 44 is adapted to hold a second locator pin 48 which also may be extended and retracted radially relative to the axial channel 40 . As shown in FIG. 2 , the second locator pin 48 is longer than the first locator pin 46 .
- the annular body 32 further includes a first set of radial locking pin channels 50 which are adapted to hold a first set of locking pins 52 which may be extended and retracted radially relative to the axial channel 40 .
- the annular body 32 further includes a second set of radial locking pin channels 56 which are adapted to hold a second set of locking pins 58 which may be extended and retracted radially relative to the axial channel 40 .
- the first set of locking pins 52 are longer and thinner than the second set of locking pins 58 .
- FIG. 3 illustrates one exemplary pattern for placement of the locator pins 46 , 48 and the first set of locking pins 52 around the circumference of the annular body 32 .
- the individual locking pins 52 are arranged at positions between the locations of the attachment bolts 34 .
- the second set of locking pins 58 may be arranged in substantially the same pattern as the first set of locking pins 52 .
- other positional arrangements may be used if desired such that the first set of locking pins 52 may be offset from the second set of locking pins 58 if desired.
- the sealing adapter 30 includes a dummy hanger designated generally as 60 adapted for sliding insertion into the axial channel 40 .
- the dummy hanger 60 includes an annular sleeve insert 62 and an axial plug 64 of substantially solid construction which is matedly inserted into the interior bore of the annular sleeve insert 62 .
- Both the annular sleeve insert 62 and the axial plug 64 may be formed from a steel alloy or other suitable material as may be desired.
- the lower edge of the annular sleeve insert includes a first positioning notch 66 which is configured to accept the distal end of the first locator pin 46 when the first locator pin 46 is in an inserted condition.
- first positioning notch 66 preferably closely matches the distal end of the first locator pin 46 to prevent substantial rotational movement following initial placement.
- outer diameter of the annular sleeve insert 62 preferably matches closely with the inner diameter of the axial channel 40 to prevent the annular sleeve insert from tilting within the axial channel 40 .
- the annular sleeve insert 62 includes a reduced diameter neck 68 which extends circumferentially about the annular sleeve insert 62 .
- the reduced diameter neck 68 is positioned to engage distal ends of the upper locking pins 58 when the annular sleeve insert has engaged the first locator pin 46 and the upper locking pins have been advanced into the axial channel 40 .
- the annular sleeve insert may be locked in place against axial withdrawal.
- the annular sleeve insert 62 further includes a number of pin receiving channels 65 which are oriented to be in substantial alignment with the first set of radial locking pin channels 50 .
- distal ends of the lower locking pins 52 may project through the pin receiving channels 65 to engage the exterior of the axial plug 64 .
- the axial plug 64 may be locked in place against axial withdrawal.
- annular sleeve insert 62 and the axial plug 64 cooperatively form a double barrier seal relative to the tubing hanger 14 and the operatively connected production tubing head 12 .
- the annular sleeve insert 62 includes a pair of circumferential grooves 70 which are adapted to hold a first set of o-rings 72 or other compressible seals.
- the o-rings 72 provide a tight seal between the annular sleeve insert 62 and the inner wall of the annular body 32 .
- the o-rings 72 are spaced apart from one another along the height of the annular sleeve insert 62 to provide a double seal relationship. Thus, even if one seal fails, the overall sealing relation nonetheless remains intact.
- the axial plug 64 is configured to be slidingly inserted into the interior bore of the annular sleeve insert 62 .
- the user can adapt a type H back pressure valve that is threadingly inserted into the sleeve 62 .
- the fullbore back pressure valve axial plug 64 allows the use of a production tree that matches the bore of the tubing used in the completion. For instance, where a type H back pressure valve is used in the lower hanger and a 2′′ full bore axial plug 64 is used in the upper hanger, a 2 1/16′′ bore production tree can be installed on the well.
- the lower edge of the axial plug 64 includes a second positioning notch 76 which is configured to accept the distal end of the second locator pin 48 when the second locator pin 48 is in an inserted condition.
- the second locator pin 48 When the annular sleeve insert 62 is oriented such that the first locator pin engages the first positioning notch 66 , the second locator pin 48 will be aligned with a radial positioning channel 78 in the wall of the annular sleeve insert 62 . Thus, once the annular sleeve insert 62 is in place, the second locator pin 48 may be advanced through the radial positioning channel 78 to project into the inner bore of the annular sleeve insert. Accordingly, by first advancing the second locator pin 48 to the position illustrated in FIG. 2 , and then inserting the axial plug 64 , both the height and orientation of the axial plug 64 are established within the inner bore of the annular sleeve insert 62 .
- the width of the second positioning notch 76 preferably closely matches the distal end of the second locator pin 48 to prevent substantial rotational movement following initial placement.
- the outer diameter of the axial plug 64 preferably matches closely with the inner diameter of the annular sleeve insert 62 to prevent the axial plug 64 from tilting within the annular sleeve insert 62 .
- the axial plug 64 includes a pair of circumferential grooves which are adapted to hold a second set of o-rings 80 or other compressible seals.
- the second set of o-rings 80 provides a tight seal between the axial plug 64 and the inner wall of the annular sleeve insert 62 .
- the o-rings 80 are spaced apart from one another along the height of the axial plug 64 to provide a double seal relationship. Thus, even if one seal fails, the overall sealing relation between the axial plug 64 and the annular sleeve insert remains intact.
- the first set of o-rings 72 is oriented in staggered relation to the second set of o-rings 80 such that each o-ring is at a different height within the sealing adapter 30 .
- Such an arrangement may aid in the efficacy of the overall sealing relation.
- one or more testing ports may extend through the annular body 32 . These testing ports are arranged at different heights along the sealing adapter 30 to permit monitoring of performance at different locations.
- a first testing port 82 is positioned at a height between the tubing hanger 14 and the bottom of the dummy hanger 60 .
- the sealing performance of the tubing hanger 14 can be monitored at the first testing port 82 .
- a second testing port 84 is positioned at a height between the upper and lower members of the first set of o-rings 72 . As will be appreciated, by monitoring the pressure at the second testing port 84 , the performance of the seals formed by the lower o-rings 72 can be evaluated.
- a third testing port 86 is positioned at a height above the seals and the reduced diameter neck 68 on the annular sleeve insert 62 .
- the overall sealing performance of the sealing adapter may be evaluated.
- the positions of the various testing ports permit a user to diagnose the location where the sealing function has failed.
- the annular body 32 may be installed across the production tubing head 12 before fracturing operations take place.
- the system may be pressure tested using the first testing port 82 to confirm proper sealing.
- the first locator pin 46 may then be extended such that the distal end projects into the axial channel 40 .
- the annular sleeve insert 62 is then inserted in substantially coaxial relation with the annular body 32 and with the first positioning notch 66 fitting about the distal end of the first locator pin 46 .
- the height and rotational relation of the annular body 32 is thus established.
- the second set of locking pins 58 may then be advanced to engage the reduced diameter neck 68 to lock the annular sleeve insert 62 in place.
- a pressure test may then be performed through the second testing port 84 .
- the second locator pin 48 may be advanced through the radial positioning channel 78 in the annular sleeve insert 62 such that the distal end of the second locator pin 48 extends into the bore of the annular sleeve insert 62 .
- the solid axial plug 64 may be inserted in substantially coaxial relation with the annular body 32 and annular sleeve insert 62 and with the second positioning notch 76 fitting about the distal end of the second locator pin 48 .
- the height and rotational relation of the axial plug 64 is thus established.
- the first set of locking pins 52 may then be advanced to lock the axial plug 64 in place.
- a pressure test may then be performed through the third testing port 86 to confirm the overall sealing function.
- the sealing adapter 30 provides an effective second barrier across the production tubing head 12 once fracturing operations are complete and the fracturing equipment has been removed.
- the sealing adapter 30 acts to protect the neck of the tubing hanger 14 or other primary sealing device while nonetheless providing access by removal of the solid axial plug 64 .
- the tubing head 12 and sealing adaptor 30 may be forged from a single piece rather than connecting the sealing adaptor 30 to the tubing head In this embodiment, it will be readily understood that the attachment bolts 34 and nuts 36 are no longer required.
- the operation of this embodiment is the same as that of the embodiment shown in FIGS. 1 through 3 .
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Abstract
A tubing head adapter which operates to provide a supplemental sealing barrier for a tubing head while maintaining access to the interior of the tubing head. The adapter includes an annular body adapted to be secured in fixed relation to the tubing head and a dummy hanger adapted to be matedly inserted into the annular body. The dummy hanger includes an annular sleeve insert and a removable axial plug disposed within the annular sleeve insert. A plurality of extendable and retractable locking pins secure the dummy hanger in place.
Description
- The present invention relates generally to barrier systems for wells, and more particularly, to a barrier system adapted to provide secondary protective sealing for a tubing head operatively engaging an oil or gas well.
- It is well known to increase production from oil and gas formations by so called “fracturing” to increase the permeability of the production zone. In general, fracturing involves pumping pressurized fluids through perforations in a well casing into a production zone in order to break or fracture pores in the production zone. In the fracturing procedure, fracturing fluids are pumped under very high pressures of about 5,000 to 10,000 psi through the perforations into the formation. The high pressure breaks the formation to form flow channels for hydrocarbon fluids. In practice, it is common to carry out fracturing procedures for a collective group of wells and to then seal some or all of those wells for a period of time until production operations commence.
- Oil and gas wells are typically provided with a production tubing head (also known as a tubing spool) which serves as a connection for the fracturing equipment as well as for the introduction tubing or other equipment into the well interior during production. As will be appreciated, following the fracturing operation, the well typically has a substantial positive pressure as hydrocarbons seek to exit from the production zone. Once the fracturing equipment is removed, it is therefore necessary to seal off the tubing head to avoid backflow from the well and to avoid the introduction of debris into the tubing head. As part of this sealing procedure, it is common to introduce a tubing hanger into the axial bore of the tubing head to provide an axial seal.
- The use of such tubing hangers is considered generally desirable due to the ease of use and ability to maintain full bore access by removing the hanger. However, it has been found that tubing hangers may be susceptible to damage and/or may permit a pressure leak when subjected to high pressure over extended periods following the fracturing operation. Accordingly, a supplemental tubing head barrier that may be adapted to function with existing tubing head constructions to provide additional sealing protection without unduly limiting access to the tubing head interior would be desirable.
- The present invention provides advantages and alternatives over the prior art by providing a tubing head adapter which operates to provide a supplemental sealing barrier for a tubing head while maintaining access to the interior of the tubing head. The present invention also provides a dual barrier stack-up completion that allows removal of the fracture stack and production tree installation with dual barriers between produced hydrocarbons and the atmosphere.
- In accordance with one aspect, the present invention provides an adapter for disposition in sealing relation to a tubing head operatively connected to a hydrocarbon well. The adapter includes an annular body adapted to be secured in fixed relation to the tubing head. The annular body includes an axial channel, a first set of radial locking pin channels extending radially away from the axial channel and at least a second set of radial locking pin channels extending radially away from the axial channel. The second set of radial locking pin channels are axially spaced from the first set of radial locking pin channels. The adapter further includes a dummy hanger adapted to be matedly inserted into the axial channel. The dummy hanger includes an annular sleeve insert having a central bore and a removable axial plug disposed within the central bore. The annular sleeve insert includes a plurality of pin receiving channels extending radially through the annular sleeve insert for aligned relation with the first set of radial locking pin channels. A first set of extendable and retractable locking pins are disposed within the first set of radial locking pin channels. The first set of extendable and retractable locking pins includes distal ends adapted to project through the pin receiving channels in the annular sleeve insert to engage the axial plug. A second set of extendable and retractable locking pins are disposed within the second set of radial locking pin channels. The second set of extendable and retractable locking pins include distal ends adapted to engage the annular sleeve insert. A first compressible seal is disposed circumferentially about the annular sleeve insert. At least a second compressible seal is disposed circumferentially about the annular sleeve insert in axially spaced relation from the first compressible seal. At least a third compressible seal is disposed circumferentially about the axial plug. At least a fourth compressible seal is disposed circumferentially about the axial plug in axially spaced relation from the third compressible seal.
- Other exemplary constructions, features and advantages of the invention will become apparent to those skilled in the art upon review of the following detailed description, claims and drawings.
-
FIG. 1 is a side sectional view of an exemplary tubing head with a tubing hanger in place and with an exemplary sealing adaptor consistent with the present disclosure in place across the tubing head with a dummy hanger sleeve and axial plug removed; -
FIG. 2 is a side sectional view of the exemplary sealing adapter ofFIG. 1 showing the dummy hanger annular sleeve insert and axial plug in place; and -
FIG. 3 is a sectional plan view taken generally through line 3-3 inFIG. 1 showing an exemplary positional arrangement for locator pins and locking pins holding the dummy hanger annular sleeve insert and axial plug in place; -
FIG. 4 is a side sectional view of an alternative embodiment of the invention providing a unibody tubing head and sealing adaptor with a tubing hanger in place in the tubing head portion with a dummy hanger sleeve and axial plug removed. - Before the embodiments of the invention are explained in detail, it is to be understood that the invention is in no way limited in its application to the details of construction and/or to the arrangements of the components set forth in the following description or illustrated in the drawings. Rather, the invention is capable of other embodiments and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein are for purposes of description only and should not be regarded as limiting. The use herein of “including”, “comprising”, and variations thereof is meant to encompass the items listed thereafter and equivalents, as well as additional items and equivalents thereof.
- Reference will now be made to the drawings. To the extent possible, like elements are designated by like reference numerals in the various views. Referring to
FIG. 1 , a production tubing head 12 (also referred to as a tubing spool) is shown with atubing hanger 14 in place within theaxial bore 16 of thetubing head 12. In practice, thetubing head 12 is operatively connected to a well casing (not shown) in a manner as will be well known to those of skill in the art. As shown, thetubing head 12 may include aconnection leg 18 for attachment of fracturing equipment or the like. In the illustrated exemplary arrangement, theconnection leg 18 may be sealed by use of anisolation valve 20 and aflange seal 22. Thus, thetubing hanger 14 in combination with theisolation valve 20 and theflange seal 22 act to provide primary sealing of theproduction tubing head 12. However, other primary sealing arrangements may be used if desired. - In a typical arrangement, the
production tubing head 12 has a circular spool shape and includes alower attachment flange 26 as well as anupper attachment flange 28. As will be appreciated, thelower attachment flange 26 and theupper attachment flange 28 each typically includes a multiplicity of bolt holes arranged circumferentially about the perimeter outboard from theaxial bore 16. Connection bolts may be run through the bolt holes to permit attachment of other structures at either end of theproduction tubing head 12. - In accordance with the present invention, a
sealing adapter 30 may be operatively connected across theupper attachment flange 28. As will be described further hereinafter, thesealing adapter 30 acts to provide a secondary sealing barrier for theproduction tubing head 12 when fracturing operations are complete. Thesealing adapter 30 also provides protection for thetubing hanger 14. - Referring now jointly to
FIGS. 1-3 , in the illustrated exemplary embodiment, thesealing adapter 30 includes anannular body 32 which may be mounted in fixed relation across theupper attachment flange 28 of theproduction tubing hanger 12 by use of attachment bolts 34 (FIG. 2 ) extending downwardly for engagement with complementary bolt holes arranged circumferentially about theupper attachment flange 28. By way of example only, and not limitation, theannular body 32 may be formed from cast steel or other suitable metal, although non-metallic materials may also be used if desired. As shown, theannular body 32 may be secured in place bynuts 36 which engage theattachment bolts 34. In this regard, it will be understood that in actualpractice attachment bolts 34 typically will be disposed circumferentially about theannular body 32 for connection using complementary nuts. By way of example only, and not limitation, one such exemplary pattern is illustrated inFIG. 3 . However, it is likewise contemplated that a larger or smaller number of bolt positions may be used if desired. As illustrated,attachment bolts 34 may also extend outwardly from an upper surface of theannular body 32 for attachment to additional structures (not shown). - As illustrated, the
annular body 32 includes anaxial channel 40 for disposition in substantial alignment with theaxial bore 16 of theproduction tubing head 12. Thus, the neck of thetubing hanger 14 may project upwardly into theaxial channel 40. As best seen through joint reference toFIGS. 2 and 3 , theannular body 32 also includes an arrangement of radial channels for mounting extendable and retractable pins. In this regard, a firstradial locator channel 42 and a secondradial locator channel 44 are disposed in opposing relation to one another on either side of theaxial channel 40. The firstradial locator channel 42 is adapted to hold afirst locator pin 46 which may be extended and retracted radially relative to theaxial channel 40. The secondradial locator channel 44 is adapted to hold asecond locator pin 48 which also may be extended and retracted radially relative to theaxial channel 40. As shown inFIG. 2 , thesecond locator pin 48 is longer than thefirst locator pin 46. - In the illustrated exemplary arrangement, the
annular body 32 further includes a first set of radiallocking pin channels 50 which are adapted to hold a first set of lockingpins 52 which may be extended and retracted radially relative to theaxial channel 40. In the illustrated exemplary arrangement, theannular body 32 further includes a second set of radiallocking pin channels 56 which are adapted to hold a second set of lockingpins 58 which may be extended and retracted radially relative to theaxial channel 40. In the illustrated exemplary configuration the first set of lockingpins 52 are longer and thinner than the second set of locking pins 58. -
FIG. 3 illustrates one exemplary pattern for placement of the locator pins 46, 48 and the first set of lockingpins 52 around the circumference of theannular body 32. In this exemplary arrangement, the individual locking pins 52 are arranged at positions between the locations of theattachment bolts 34. The second set of lockingpins 58 may be arranged in substantially the same pattern as the first set of locking pins 52. However, other positional arrangements may be used if desired such that the first set of lockingpins 52 may be offset from the second set of lockingpins 58 if desired. - As shown, the sealing
adapter 30 includes a dummy hanger designated generally as 60 adapted for sliding insertion into theaxial channel 40. In the illustrated exemplary construction thedummy hanger 60 includes anannular sleeve insert 62 and anaxial plug 64 of substantially solid construction which is matedly inserted into the interior bore of theannular sleeve insert 62. Both theannular sleeve insert 62 and theaxial plug 64 may be formed from a steel alloy or other suitable material as may be desired. - As best seen in
FIG. 2 , in the exemplary embodiment the lower edge of the annular sleeve insert includes afirst positioning notch 66 which is configured to accept the distal end of thefirst locator pin 46 when thefirst locator pin 46 is in an inserted condition. Thus, by advancing thefirst locator pin 46 into theaxial channel 40 and then inserting theannular sleeve insert 62, both the height and rotational orientation of theannular sleeve insert 62 are established. In this regard, it will be understood that the width of thefirst positioning notch 66 preferably closely matches the distal end of thefirst locator pin 46 to prevent substantial rotational movement following initial placement. Likewise, the outer diameter of theannular sleeve insert 62 preferably matches closely with the inner diameter of theaxial channel 40 to prevent the annular sleeve insert from tilting within theaxial channel 40. - As shown, the
annular sleeve insert 62 includes a reduceddiameter neck 68 which extends circumferentially about theannular sleeve insert 62. As best seen inFIG. 2 , the reduceddiameter neck 68 is positioned to engage distal ends of the upper locking pins 58 when the annular sleeve insert has engaged thefirst locator pin 46 and the upper locking pins have been advanced into theaxial channel 40. Thus, by advancing the upper locking pins 58, the annular sleeve insert may be locked in place against axial withdrawal. - As shown, the
annular sleeve insert 62 further includes a number ofpin receiving channels 65 which are oriented to be in substantial alignment with the first set of radiallocking pin channels 50. Thus, distal ends of the lower locking pins 52 may project through thepin receiving channels 65 to engage the exterior of theaxial plug 64. Thus, by advancing the lower locking pins 52, theaxial plug 64 may be locked in place against axial withdrawal. - The
annular sleeve insert 62 and theaxial plug 64 cooperatively form a double barrier seal relative to thetubing hanger 14 and the operatively connectedproduction tubing head 12. In this regard, in the illustrated exemplary construction theannular sleeve insert 62 includes a pair ofcircumferential grooves 70 which are adapted to hold a first set of o-rings 72 or other compressible seals. As will be appreciated, the o-rings 72 provide a tight seal between theannular sleeve insert 62 and the inner wall of theannular body 32. In this regard, the o-rings 72 are spaced apart from one another along the height of theannular sleeve insert 62 to provide a double seal relationship. Thus, even if one seal fails, the overall sealing relation nonetheless remains intact. - As noted previously, the
axial plug 64 is configured to be slidingly inserted into the interior bore of theannular sleeve insert 62. Alternatively, rather than use theaxial plug 64, the user can adapt a type H back pressure valve that is threadingly inserted into thesleeve 62. The fullbore back pressure valveaxial plug 64 allows the use of a production tree that matches the bore of the tubing used in the completion. For instance, where a type H back pressure valve is used in the lower hanger and a 2″ full boreaxial plug 64 is used in the upper hanger, a 2 1/16″ bore production tree can be installed on the well. In this example, when a type H back pressure valve is used in both the upper and lower hanger, a 2″ back pressure valve is used in the lower hanger and a 2½″ back pressure value is used in the upper hanger. This installation would then require the use of a larger 2 9/16″ bore production tree. As best seen inFIG. 2 , in the exemplary embodiment the lower edge of theaxial plug 64 includes asecond positioning notch 76 which is configured to accept the distal end of thesecond locator pin 48 when thesecond locator pin 48 is in an inserted condition. When theannular sleeve insert 62 is oriented such that the first locator pin engages thefirst positioning notch 66, thesecond locator pin 48 will be aligned with aradial positioning channel 78 in the wall of theannular sleeve insert 62. Thus, once theannular sleeve insert 62 is in place, thesecond locator pin 48 may be advanced through theradial positioning channel 78 to project into the inner bore of the annular sleeve insert. Accordingly, by first advancing thesecond locator pin 48 to the position illustrated inFIG. 2 , and then inserting theaxial plug 64, both the height and orientation of theaxial plug 64 are established within the inner bore of theannular sleeve insert 62. As will be appreciated, the width of thesecond positioning notch 76 preferably closely matches the distal end of thesecond locator pin 48 to prevent substantial rotational movement following initial placement. In addition, the outer diameter of theaxial plug 64 preferably matches closely with the inner diameter of theannular sleeve insert 62 to prevent theaxial plug 64 from tilting within theannular sleeve insert 62. - In the illustrated exemplary construction, the
axial plug 64 includes a pair of circumferential grooves which are adapted to hold a second set of o-rings 80 or other compressible seals. As will be appreciated, the second set of o-rings 80 provides a tight seal between theaxial plug 64 and the inner wall of theannular sleeve insert 62. In this regard, the o-rings 80 are spaced apart from one another along the height of theaxial plug 64 to provide a double seal relationship. Thus, even if one seal fails, the overall sealing relation between theaxial plug 64 and the annular sleeve insert remains intact. - As shown, in the exemplary configuration the first set of o-rings 72 is oriented in staggered relation to the second set of o-
rings 80 such that each o-ring is at a different height within the sealingadapter 30. Such an arrangement may aid in the efficacy of the overall sealing relation. - In at least one exemplary embodiment, one or more testing ports may extend through the
annular body 32. These testing ports are arranged at different heights along the sealingadapter 30 to permit monitoring of performance at different locations. By way of example only, in the illustrated exemplary embodiment afirst testing port 82 is positioned at a height between thetubing hanger 14 and the bottom of thedummy hanger 60. As will be appreciated, the sealing performance of thetubing hanger 14 can be monitored at thefirst testing port 82. Asecond testing port 84 is positioned at a height between the upper and lower members of the first set of o-rings 72. As will be appreciated, by monitoring the pressure at thesecond testing port 84, the performance of the seals formed by the lower o-rings 72 can be evaluated. Athird testing port 86 is positioned at a height above the seals and the reduceddiameter neck 68 on theannular sleeve insert 62. Thus, by monitoring the pressure at thethird testing port 86, the overall sealing performance of the sealing adapter may be evaluated. Moreover, in the event that a proper sealing relation is not being achieved, the positions of the various testing ports permit a user to diagnose the location where the sealing function has failed. - In practice, the
annular body 32 may be installed across theproduction tubing head 12 before fracturing operations take place. After installation of thetubing hanger 14, the system may be pressure tested using thefirst testing port 82 to confirm proper sealing. Thefirst locator pin 46 may then be extended such that the distal end projects into theaxial channel 40. With thefirst locator pin 46 in the extended position, theannular sleeve insert 62 is then inserted in substantially coaxial relation with theannular body 32 and with thefirst positioning notch 66 fitting about the distal end of thefirst locator pin 46. The height and rotational relation of theannular body 32 is thus established. The second set of lockingpins 58 may then be advanced to engage the reduceddiameter neck 68 to lock theannular sleeve insert 62 in place. A pressure test may then be performed through thesecond testing port 84. - Once the
annular sleeve insert 62 is properly positioned, thesecond locator pin 48 may be advanced through theradial positioning channel 78 in theannular sleeve insert 62 such that the distal end of thesecond locator pin 48 extends into the bore of theannular sleeve insert 62. With thesecond locator pin 48 in the extended position, the solidaxial plug 64 may be inserted in substantially coaxial relation with theannular body 32 andannular sleeve insert 62 and with thesecond positioning notch 76 fitting about the distal end of thesecond locator pin 48. The height and rotational relation of theaxial plug 64 is thus established. The first set of lockingpins 52 may then be advanced to lock theaxial plug 64 in place. A pressure test may then be performed through thethird testing port 86 to confirm the overall sealing function. - In use, the sealing
adapter 30 provides an effective second barrier across theproduction tubing head 12 once fracturing operations are complete and the fracturing equipment has been removed. In particular, the sealingadapter 30 acts to protect the neck of thetubing hanger 14 or other primary sealing device while nonetheless providing access by removal of the solidaxial plug 64. - As seen in an alternative embodiment in
FIG. 4 , thetubing head 12 and sealingadaptor 30 may be forged from a single piece rather than connecting the sealingadaptor 30 to the tubing head In this embodiment, it will be readily understood that theattachment bolts 34 andnuts 36 are no longer required. Other than being formed from a single piece rather than separate tubing head and sealing adaptor, the operation of this embodiment is the same as that of the embodiment shown inFIGS. 1 through 3 . - Of course, variations and modifications of the foregoing are within the scope of the present invention. Thus, it is to be understood that the invention disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the invention. The embodiment described herein explain the best modes for practicing the invention and will enable others skilled in the art to utilize the invention. The claims are to be construed to include alternative embodiments and equivalents to the extent permitted by the prior art.
- The use of the terms “a” and “an” and “the” and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms “comprising,” “having,” “including,” and “containing” are to be construed as open-ended terms (i.e., meaning “including, but not limited to,”) unless otherwise noted. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
- Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.
- Various features of the invention are set forth in the following claims.
Claims (20)
1. An adapter for disposition in sealing relation to a tubing head operatively connected to a hydrocarbon well, the adapter comprising:
an annular body adapted to be secured in fixed relation to the tubing head, the annular body including an axial channel, a first set of radial locking pin channels extending radially away from the axial channel and at least a second set of radial locking pin channels extending radially away from the axial channel, the second set of radial locking pin channels being axially spaced from the first set of radial locking pin channels;
a dummy hanger adapted to be matedly inserted into the axial channel, the dummy hanger including an annular sleeve insert having a central bore and a removable axial plug disposed within the central bore of the annular sleeve insert, the annular sleeve insert including a plurality of pin receiving channels extending radially through the annular sleeve insert for aligned relation with the first set of radial locking pin channels;
a first set of extendable and retractable locking pins disposed within the first set of radial locking pin channels, the first set of extendable and retractable locking pins including distal ends adapted to project through the pin receiving channels in the annular sleeve insert to engage the axial plug;
a second set of extendable and retractable locking pins disposed within the second set of radial locking pin channels, the second set of extendable and retractable locking pins including distal ends adapted to engage the annular sleeve insert;
a first compressible seal disposed circumferentially about the annular sleeve insert;
at least a second compressible seal disposed circumferentially about the annular sleeve insert in axially spaced relation from the first compressible seal;
at least a third compressible seal disposed circumferentially about the axial plug; and
at least a fourth compressible seal disposed circumferentially about the axial plug in axially spaced relation from the third compressible seal.
2. The adapter as recited in claim 1 , further including a testing port in fluid communication with the axial channel at a position below the first set of radial locking pin channels.
3. The adapter as recited in claim 1 , further including a testing port in fluid communication with the axial channel at a position between the first set of radial locking pin channels and the second set of radial locking pin channels.
4. The adapter as recited in claim 1 , further including a testing port in fluid communication with the axial channel at a position above the first set of radial locking pin channels and the second set of radial locking pin channels.
5. The adapter as recited in claim 1 , further including a first testing port in fluid communication with the axial channel at a position below the first set of radial locking pin channels, a second testing port at a position between the first set of radial locking pin channels and the second set of radial locking pin channels and a third testing port at a position above the first set of radial locking pin channels and the second set of radial locking pin channels.
6. The adapter as recited in claim 1 , wherein the annular sleeve insert includes a reduced diameter neck adapted to engage distal ends of the second set of extendable and retractable locking pins.
7. The adapter as recited in claim 1 , wherein the third compressible seal is normally disposed at an elevation between the first compressible seal and the second compressible seal and the fourth compressible seal is normally disposed at an elevation below the first compressible seal and the second compressible seal.
8. The adapter as recited in claim 1 , wherein the annular sleeve insert includes a first positioning notch disposed at a lower edge and the axial plug includes a second positioning notch disposed at a lower edge, and wherein a first extendable and retractable locator pin is disposed within a first radial locator channel, the first extendable and retractable locator pin including a distal end adapted to project into the axial channel to engage the first positioning notch at the annular sleeve insert, and wherein a second extendable and retractable locator pin is disposed within a second radial locator channel, the second extendable and retractable locator pin including a distal end adapted to project across the annular sleeve insert to engage the second positioning notch at the axial plug.
9. The adapter as recited in claim 8 , wherein the first extendable and retractable locator pin is disposed at substantially the same elevation as the second extendable and retractable locator pin.
10. An adapter for disposition in sealing relation to a tubing head operatively connected to a hydrocarbon well, the adapter comprising:
an annular body adapted to be secured in fixed relation to the tubing head, the annular body including an axial channel, a first set of radial locking pin channels extending radially away from the axial channel and at least a second set of radial locking pin channels extending radially away from the axial channel, the second set of radial locking pin channels being axially spaced apart from the first set of radial locking pin channels, a first radial locator channel extending radially away from the axial channel, and at least a second radial locator channel extending radially away from the axial channel, the first radial locator channel and the second radial locator channel each being disposed at axial positions below the first set of radial locking pin channels and the second set of radial locking pin channels;
a dummy hanger adapted to be matedly inserted into the axial channel in substantially coaxial relation to the annular body, the dummy hanger including an annular sleeve insert having a central bore and a removable axial plug disposed within the central bore of the annular sleeve insert in substantially coaxial relation with the annular sleeve insert, the annular sleeve insert including a first positioning notch disposed at a lower edge and a plurality of pin receiving channels extending radially through the annular sleeve insert for aligned relation with the first set of radial locking pin channels, and a radial positioning channel extending radially through the annular sleeve insert to the central bore for aligned relation with the second radial locator channel, the axial plug including a second positioning notch disposed at a lower edge;
a first extendable and retractable locator pin disposed within the first radial locator channel, the first extendable and retractable locator pin including a distal end adapted to project into the axial channel to engage the first positioning notch at the annular sleeve insert;
a second extendable and retractable locator pin disposed within the second radial locator channel, the second extendable and retractable locator pin including a distal end adapted to project across the annular sleeve insert to engage the second positioning notch at the axial plug,
a first set of extendable and retractable locking pins disposed within the first set of radial locking pin channels, the first set of extendable and retractable locking pins including distal ends adapted to project through the pin receiving channels in the annular sleeve insert to engage the axial plug;
a second set of extendable and retractable locking pins disposed within the second set of radial locking pin channels, the second set of extendable and retractable locking pins including distal ends adapted to engage the annular sleeve insert;
a first compressible seal disposed circumferentially about the annular sleeve insert;
at least a second compressible seal disposed circumferentially about the annular sleeve insert in axially spaced relation from the first compressible seal;
at least a third compressible seal disposed circumferentially about the axial plug; and
at least a fourth compressible seal disposed circumferentially about the axial plug in axially spaced relation from the third compressible seal, wherein each of the first, second, third and fourth compressible seals are disposed axially between the first set of extendable and retractable locking pins and the second set of extendable and retractable locking pins.
11. The adapter as recited in claim 10 , further including a testing port in fluid communication with the axial channel at a position below the first set of radial locking pin channels.
12. The adapter as recited in claim 10 , further including a testing port in fluid communication with the axial channel at a position between the first set of radial locking pin channels and the second set of radial locking pin channels.
13. The adapter as recited in claim 10 , further including a testing port in fluid communication with the axial channel at a position above the first set of radial locking pin channels and the second set of radial locking pin channels.
14. The adapter as recited in claim 10 , further including a first testing port in fluid communication with the axial channel at a position below the first set of radial locking pin channels, a second testing port at a position between the first set of radial locking pin channels and the second set of radial locking pin channels and a third testing port at a position above the first set of radial locking pin channels and the second set of radial locking pin channels.
15. The adapter as recited in claim 10 , wherein the annular sleeve insert includes a reduced diameter neck adapted to engage distal ends of the second set of extendable and retractable locking pins.
16. The adapter as recited in claim 10 , wherein the third compressible seal is normally disposed at an elevation between the first compressible seal and the second compressible seal and the fourth compressible seal is normally disposed at an elevation below the first compressible seal and the second compressible seal.
17. The adapter as recited in claim 10 , wherein the first extendable and retractable locator pin is disposed at substantially the same elevation as the second extendable and retractable locator pin.
18. A method of applying a secondary seal across a tubing head operatively connected to a hydrocarbon well, the method comprising the steps of:
providing an annular body including an axial channel, a first set of radial locking pin channels extending radially away from the axial channel and at least a second set of radial locking pin channels extending radially away from the axial channel, the second set of radial locking pin channels being axially spaced from the first set of radial locking pin channels;
securing the annular body in fixed relation to the tubing head;
providing an annular sleeve insert having a central bore and including a plurality of pin receiving channels extending radially through the annular sleeve insert for aligned relation with the first set of radial locking pin channels;
providing a first compressible seal disposed circumferentially about the annular sleeve insert and at least a second compressible seal disposed circumferentially about the annular sleeve insert in axially spaced relation from the first compressible seal;
inserting the annular sleeve insert with the first compressible seal and at least second compressible seal into the axial channel of the annular body;
providing an axial plug having an outer diameter substantially matching the inner diameter of the annular sleeve insert;
inserting the axial plug into the central bore of the annular sleeve insert;
extending a set of locking pins disposed within the second set of radial locking pin channels such that distal ends of the locking pins engage the annular sleeve insert; and
extending another set of locking pins disposed within the first set of radial locking pin channels such that distal ends of the locking pins project through the pin receiving channels in the annular sleeve insert and engage the axial plug.
19. The method as recited in claim 18 , wherein the annular sleeve insert includes a first positioning notch disposed at a lower edge and the axial plug includes a second positioning notch disposed at a lower edge, and wherein a first extendable and retractable locator pin is extended into the axial channel to engage the first positioning notch at the annular sleeve insert such that the rotational position and height of the annular sleeve insert is fixed, and wherein a second extendable and retractable locator pin is extended across the annular sleeve insert to engage the second positioning notch at the axial plug such that the rotational position and height of the axial plug is fixed.
20. A tubing head including a sealing portion, the sealing portion comprising:
an annular body formed in the upper portion of the tubing head, the annular body including an axial channel, a first set of radial locking pin channels extending radially away from the axial channel and at least a second set of radial locking pin channels extending radially away from the axial channel, the second set of radial locking pin channels being axially spaced from the first set of radial locking pin channels;
a dummy hanger adapted to be matedly inserted into the axial channel, the dummy hanger including an annular sleeve insert having a central bore and a removable axial plug disposed within the central bore of the annular sleeve insert, the annular sleeve insert including a plurality of pin receiving channels extending radially through the annular sleeve insert for aligned relation with the first set of radial locking pin channels;
a first set of extendable and retractable locking pins disposed within the first set of radial locking pin channels, the first set of extendable and retractable locking pins including distal ends adapted to project through the pin receiving channels in the annular sleeve insert to engage the axial plug;
a second set of extendable and retractable locking pins disposed within the second set of radial locking pin channels, the second set of extendable and retractable locking pins including distal ends adapted to engage the annular sleeve insert;
a first compressible seal disposed circumferentially about the annular sleeve insert;
at least a second compressible seal disposed circumferentially about the annular sleeve insert in axially spaced relation from the first compressible seal;
at least a third compressible seal disposed circumferentially about the axial plug; and
at least a fourth compressible seal disposed circumferentially about the axial plug in axially spaced relation from the third compressible seal.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/835,349 US20120012335A1 (en) | 2010-07-13 | 2010-07-13 | Sealing adapter for well tubing head |
PCT/US2011/043879 WO2012009451A1 (en) | 2010-07-13 | 2011-07-13 | Drilling operation suspension spool |
US13/182,184 US20120012341A1 (en) | 2010-07-13 | 2011-07-13 | Drilling operation suspension spool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/835,349 US20120012335A1 (en) | 2010-07-13 | 2010-07-13 | Sealing adapter for well tubing head |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/182,184 Continuation-In-Part US20120012341A1 (en) | 2010-07-13 | 2011-07-13 | Drilling operation suspension spool |
Publications (1)
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US20120012335A1 true US20120012335A1 (en) | 2012-01-19 |
Family
ID=45466006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/835,349 Abandoned US20120012335A1 (en) | 2010-07-13 | 2010-07-13 | Sealing adapter for well tubing head |
Country Status (1)
Country | Link |
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US (1) | US20120012335A1 (en) |
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US20120085545A1 (en) * | 2010-10-05 | 2012-04-12 | Zaurayze Tarique | Apparatus and method for controlled pressure drilling |
US10502015B2 (en) | 2016-11-29 | 2019-12-10 | Innovex Enerserv Assetco, Llc | Tubing hanger assembly with wellbore access, and method of accessing a wellbore |
US10801291B2 (en) | 2016-08-03 | 2020-10-13 | Innovex Downhole Solutions, Inc. | Tubing hanger system, and method of tensioning production tubing in a wellbore |
US10975654B1 (en) | 2019-11-07 | 2021-04-13 | Saudi Arabian Oil Company | Wellhead telescopic adaptor for wellhead assembly |
US11136849B2 (en) | 2019-11-05 | 2021-10-05 | Saudi Arabian Oil Company | Dual string fluid management devices for oil and gas applications |
US11156052B2 (en) | 2019-12-30 | 2021-10-26 | Saudi Arabian Oil Company | Wellbore tool assembly to open collapsed tubing |
US11230904B2 (en) | 2019-11-11 | 2022-01-25 | Saudi Arabian Oil Company | Setting and unsetting a production packer |
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US11260351B2 (en) | 2020-02-14 | 2022-03-01 | Saudi Arabian Oil Company | Thin film composite hollow fiber membranes fabrication systems |
US11421500B2 (en) * | 2019-10-30 | 2022-08-23 | Power Feed Thru Systems and Connectors, LLC | Pipe diameter reduction lock-down system |
US11448026B1 (en) | 2021-05-03 | 2022-09-20 | Saudi Arabian Oil Company | Cable head for a wireline tool |
US11549329B2 (en) | 2020-12-22 | 2023-01-10 | Saudi Arabian Oil Company | Downhole casing-casing annulus sealant injection |
US11598178B2 (en) | 2021-01-08 | 2023-03-07 | Saudi Arabian Oil Company | Wellbore mud pit safety system |
US11655685B2 (en) | 2020-08-10 | 2023-05-23 | Saudi Arabian Oil Company | Downhole welding tools and related methods |
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US9856713B2 (en) * | 2010-10-05 | 2018-01-02 | Smith International Inc. | Apparatus and method for controlled pressure drilling |
US20120085545A1 (en) * | 2010-10-05 | 2012-04-12 | Zaurayze Tarique | Apparatus and method for controlled pressure drilling |
US10801291B2 (en) | 2016-08-03 | 2020-10-13 | Innovex Downhole Solutions, Inc. | Tubing hanger system, and method of tensioning production tubing in a wellbore |
US11066890B2 (en) | 2016-11-29 | 2021-07-20 | Innovex Downhole Solutions, Inc. | Tubing hanger assembly with a tubing head adapter receivable onto a tubing head in any rotational orientation |
US11047198B2 (en) | 2016-11-29 | 2021-06-29 | Innovex Downhole Solutions, Inc. | Tubing hanger assembly with wellbore access, and method of accessing a wellbore |
US10502015B2 (en) | 2016-11-29 | 2019-12-10 | Innovex Enerserv Assetco, Llc | Tubing hanger assembly with wellbore access, and method of accessing a wellbore |
US11421500B2 (en) * | 2019-10-30 | 2022-08-23 | Power Feed Thru Systems and Connectors, LLC | Pipe diameter reduction lock-down system |
US11136849B2 (en) | 2019-11-05 | 2021-10-05 | Saudi Arabian Oil Company | Dual string fluid management devices for oil and gas applications |
US10975654B1 (en) | 2019-11-07 | 2021-04-13 | Saudi Arabian Oil Company | Wellhead telescopic adaptor for wellhead assembly |
US11421502B2 (en) | 2019-11-07 | 2022-08-23 | Saudi Arabian Oil Company | Wellhead telescopic adaptor for wellhead assembly |
US11230904B2 (en) | 2019-11-11 | 2022-01-25 | Saudi Arabian Oil Company | Setting and unsetting a production packer |
US11156052B2 (en) | 2019-12-30 | 2021-10-26 | Saudi Arabian Oil Company | Wellbore tool assembly to open collapsed tubing |
US11260351B2 (en) | 2020-02-14 | 2022-03-01 | Saudi Arabian Oil Company | Thin film composite hollow fiber membranes fabrication systems |
US11253819B2 (en) | 2020-05-14 | 2022-02-22 | Saudi Arabian Oil Company | Production of thin film composite hollow fiber membranes |
US11655685B2 (en) | 2020-08-10 | 2023-05-23 | Saudi Arabian Oil Company | Downhole welding tools and related methods |
US11549329B2 (en) | 2020-12-22 | 2023-01-10 | Saudi Arabian Oil Company | Downhole casing-casing annulus sealant injection |
US11828128B2 (en) | 2021-01-04 | 2023-11-28 | Saudi Arabian Oil Company | Convertible bell nipple for wellbore operations |
US11598178B2 (en) | 2021-01-08 | 2023-03-07 | Saudi Arabian Oil Company | Wellbore mud pit safety system |
US11448026B1 (en) | 2021-05-03 | 2022-09-20 | Saudi Arabian Oil Company | Cable head for a wireline tool |
US11859815B2 (en) | 2021-05-18 | 2024-01-02 | Saudi Arabian Oil Company | Flare control at well sites |
US11905791B2 (en) | 2021-08-18 | 2024-02-20 | Saudi Arabian Oil Company | Float valve for drilling and workover operations |
US11913298B2 (en) | 2021-10-25 | 2024-02-27 | Saudi Arabian Oil Company | Downhole milling system |
US11993992B2 (en) | 2022-08-29 | 2024-05-28 | Saudi Arabian Oil Company | Modified cement retainer with milling assembly |
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