GB2172031A - An inverse differential casing cementing float valve - Google Patents
An inverse differential casing cementing float valve Download PDFInfo
- Publication number
- GB2172031A GB2172031A GB08505890A GB8505890A GB2172031A GB 2172031 A GB2172031 A GB 2172031A GB 08505890 A GB08505890 A GB 08505890A GB 8505890 A GB8505890 A GB 8505890A GB 2172031 A GB2172031 A GB 2172031A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- valve body
- housing
- primary
- differential
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims abstract description 6
- 230000000712 assembly Effects 0.000 abstract description 6
- 238000000429 assembly Methods 0.000 abstract description 6
- 239000004568 cement Substances 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 10
- 230000000717 retained effect Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Check Valves (AREA)
Abstract
An inverse differential fill-up casing cementing float valve comprises an annular valve housing (52) back pressure valve assembly (54), a first differential pressure check valve assembly (56), a second differential pressure check valve assembly (58), and cement filler material (60) to retain the valve assemblies within the valve housing. The valve is used fitted to a casing string to enable the string to retain drilling mud therein whilst it is located in a well bore for cementing. <IMAGE>
Description
SPECIFICATION
An inverse differential casing cementing float valve
This invention relates to an inverse defferential fill-up casing cementing float valve used in the cementing of casing in offshore oil and gas wells.
When running large diameter well casing from offshore drilling rigs into an open well bore to be cemented therein, strong sea currents may be encountered which may force the well casing away from its desired placement point in the open well bore in the sea floor. Since the well casing is usually of a large diameter and the well casing string of substantial length, as well as being buoyant, the ocean currents may push the casing far enough from the open well bore to create a problem.
To overcome this problem, the well casing is filled with drilling mud, the drilling mud being kept inside the casing until the casing has been successfully guided into the open well bore. By filling the well casing with drilling mud during this process, the drilling mud inside the casing adds to the mass and weight of the casing string, thereby making it more difficult for the ocean currents to displace or move the casing string.
We have now devised ari inverse differential fill-up casing cementing float valve to facilitate the filling of casing string with drilling mud. This valve is used on the end of the casing string to be inserted and cemented into the well bore, and serves to retain the drilling mud in the casing string until a predetermined differential pressure exists between the interior of the casing string and the fluid in the well bore or the surrounding sea water, during the running of the casing string and during circulation prior to the cementing of the casing string in the well bore. The valve of the present invention further functions as a cementing check valve during the cementing of the casing string in the well bore.
The inverse differential fill-up casing cementing float valve of the present invention comprises an annular valve housing, back pressure valve assembly, a first differential pressure check valve assembly, a second differential pressure check valve assembly, and cement filler material to retain the valve assemblies within the valve housing.
In order that the invention may be more fully understood, one embodiment of valve of the invention will now be described, by way of illustration only, with reference to the accompanying drawings, wherein:
Figure1 is a drawing of a typical offshore drilling rig running a casing string therefrom, having a valve of the present invention instalied on one end thereof; and
Figure 2 is a cross-sectional view of one embodiment of float valve of the invention.
Referring to Figure 1, a valve 50 of the present invention is shown on casing string 1 for use in an offshore oil or gas well.
In Figure 1, a floating drilling rig or work station 2 is centered over a submerged oil or gas well located in the sea floor 3 having a bore hole 4 therein. The drilling rig 2 has a derrick 5 and a hoisting apparatus
6 for raising and lowering tools to drill, test and
complete the oil or gas well. After the casing string 1
having the float valve 50 of the present invention thereon is lowered into the borehole 4, the casing string 1 is cemented therein by pumping a cement slurry down the interior of the casing string 1, out through the float valve 50 and up the annulus
between the casing string 1 and the borehole or well
bore 4, thereby filling the same to the sea floor 3.
Referring to Figure 2, the inverse differential fill-up casing cementing float valve 50 of the present invention is shown in cross-section. The valve 50 comprises an annular valve housing 52, back pressure valve assembly 54, a first differential pressure check valve assembly 56, a second differential pressure check valve assembly 58. Cementitious or like filler material 60 is provided to retain the valve assemblies within the valve housing 52. The float valve 50 further includes insert collar 62 therein retained within the cementitious material 60.
The annular valve housing 52 comprises an elongated annular member having, on the exterior thereof, cylindrical surface 64 and, on the interior thereof, first bore 66, a plurality of first annular ribs 68, second bore 70 and second annular rib 72 on one end thereof.
The insert collar 62 comprises a cylindrical member having, on the exterior thereof, annular rim 74 and a plurality of annular ribs 76 thereon and, on the interior, bore 78.
The back pressure valve assembly 54 comprises annular valve housing 80, flapper valve assembly 82 and connector housing 84.
The annular valve housing 80 comprises an annu larcylindrical member having, on the exteriorthereof, frusto-conical annular surface 86 and cylindrical surface 88 and, on the interior thereof, first bore 90, frusto-conical annular surface 92, second bore 94 and third bore 96.
The flapper valve assembly 82 comprises valve body 98, valve body hinge arm 100, hinge pin 102 and valve spring 104.
The valve body 98 comprises a circular member having a frusto-conical annular exterior surface 106 thereon which is complementary to frusto-conical annular surface 92 of valve housing 80 and an annular recess 108 in the exterior having, in turn, annular elastomeric sealing member 110 therein which sealingly engages frusto-conical annular surface 92 of valve housing 80 when valve body 98 is in engagement therewith.
The valve body hinge arm 100 is attached to the bottom surface 112 of valve body 98 is retained with valve housing 80 by hinge pin 102 engaging a portion of the valve housing 80 and one end of arm 100. The valve body 98 is resiliently biased into engagement within valve housing 80 by valve spring 104 which has a portion, in turn, bearing against valve body hinge arm 100.
The connector housing 84 comprises an elongated annular member having one end connected to the valve housing 80 and a bore 1 therethrough.
The back pressure valve assembly 82 is retained within valve housing 52 by cementitious filler material 60. In operation, the back pressure valve assem bly 54 allows flow in the downward direction therethrough by the fluid opening resiliently biased valve body 98 from valve housing 80 while preventing fluid flow from below the valve body 98 to act as a check valve by the fluid causing the valve body 98 to more tightly engage the valve housing 80.
The first differential pressure check valve assembly 58 comprises differential valve housing 116, insert housing 118, primary valve body 120, secon daryvalve body 122, primary valve spring 124, primary hinge pin 126, secondary valve spring 128, secondary hinge pin 130 and connector housing 132.
The differential valve housing 116 comprises an elongated annular cylindrical member having, on the exterior thereof, first cylindrical surface 134, second cylindrical surface 136 and third cylindrical surface 138 and, on the interior thereof, first bore 140, second bore 142, third bore 144 and fourth bore 146. The differential housing 116 is further formed having an aperture 148 through the wall thereof.
The insert housing 118 comprises a cylindrical member having a cylindrical exterior, cylindrical bore therethrough, aperture in the wall thereof and an attachment hinge on one end thereof.
The primary valve body 120 comprises a circular member having bore 150 therethrough, a hinge portion on the exterior thereof and a hinge portion on the bottom thereof.
The primary valve body 120 is retained on insert housing 118 by primary hinge pin 126 and is resiliently biased into engagement with insert housing 118 by primary valve spring 124.
The secondary valve body 122 comprises a circular member having a hinge portion on the exterior thereof which is movably attached to the hinge portion on the bottom of primary valve body 120 by secondary hinge pin 130 and is biased into engage mentwiththe bottom of primary valve body 120 sealing bore 150 therethrough by secondary valve spring 128.
The insert housing 118 is retained within differential housing 116 by pin 152 which is installed in aperture 148 of differential housing 116 and the aperture in insert housing 118.
The connector housing 132 comprises an elongated cylindrical annular member having a cylindrical exterior, cylindrical boretherethrough and one end connected to differential housing 116.
The first differential pressure check valve assembly 56 is retained within valve housing 52 by cementitious filler material 60. In operation, first differential pressure check valve assembly 54 allows flow in the downward direction therethrough through bore 150 in primary valve body 120 by the fluid causing secondary valve body 122 to open away from primary valve body 120 and allows flow upwardly therethrough by primary valve body 120 being opened by the fluid.
The second differential pressure check valve assembly 58 is of the same construction and operation as first differential check valve assembly 56 except an annular valve housing 160 replaces connector housing 132, the annular valve housing 160 being of the same construction as annular valve housing 80, although any type or shape of connector may be used.
The outlet of the annular valve housing 160 communicates with bore 162 to allow fluid communication with bottom of float valve 50.
In operation, the inverse differential fill-up casing cementing float valve 50 allows the casing string 1 to be filled with drilling mud being retained therein by the first differential 56 and second differential 58 check valve assemblies until such time as the fluid pressure in the casing string 1 is great enough to open the secondary valve members of the check valve assemblies 56 and 58 to allow fluid flow therethrough. When the casing string 1 has been cemented into well bore or borehole 4 by pumping cementtherethrough, out the float valve 50 and around the casing string 1, the float valve 50 prevents the flow of cement back into the casing string 1 by back pressure valve assembly 54 acting as a check valve to prevent the flow of fluid upwardly through float valve 50.
Claims (8)
1. An inverse differential fill-up casing cementing float valve which comprises: an annular valve housing; a back pressure valve assembly; a first differential pressure check valve assembly; a second differential pressure check valve assembly; and cementitious filler material retaining the back pressure valve assembly, the first differential pressure check valve assembly and the second differential pressure check valve assembly within the annular valve housing.
2. A valve according to Claim 1,wherein the back pressure valve assembly includes: an annular valve housing; a flapper valve assembly; and a connector housing.
3. A valve according to Claim 2, wherein the flapper valve assembly includes: a valve body; a valve body hinge arm; a hinge pin; and a valve spring.
4. A valve according to Claim 1,2 or 3, wherein the first differential pressure check valve assembly includes: a differential valve housing; an insert housing within the differential valve housing; a primary valve body; a secondary valve body engaging the primary valve body; a primary valve spring engaging the primary valve body; a primary hinge pin rotatably connecting the primary valve body to the insert housing; a secondary valve spring engaging the secondary valve body resiliently biasing the secondary valve body to the primary valve body; a secondary hinge pin rotatably connecting the secondary valve body to the primary valve body; and a connector housing having one end thereof connected to the outlet of the differential valve housing.
5. A valve according to Claim 1, 2,3 or 4, wherein the second differential pressure check valve assembly includes: a differential valve housing; an insert housing within the differential valve housing; a primary valve body; a secondary valve body engaging the primary valve body; a primary valve spring engaging the primary valve body; primary hinge pin rotatably connecting the primary valve body to the insert housing; a secondary valve spring engaging the secondary valve body resiliently biasing the secondary valve body to the primary valve body; a secondary hinge pin rotatably connecting the secondary valve body to the primary valve body; and a connector housing having one end thereof connected to the outlet of the differential valve housing.
6. An inverse differential fill-up casing cementing float valve substantially as herein described with reference to Figure 2 of the accompanying drawings.
7. A float valve as claimed in any preceding claim, connected to a casing string.
8. The use of a float valve as claimed in any of
Claims 1 to 6 for connection to a casing string to retain drilling mud therein during location of the string in a well bore or borehole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08505890A GB2172031B (en) | 1985-03-07 | 1985-03-07 | An inverse differential casing cementing float valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08505890A GB2172031B (en) | 1985-03-07 | 1985-03-07 | An inverse differential casing cementing float valve |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8505890D0 GB8505890D0 (en) | 1985-04-11 |
| GB2172031A true GB2172031A (en) | 1986-09-10 |
| GB2172031B GB2172031B (en) | 1988-03-16 |
Family
ID=10575589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08505890A Expired GB2172031B (en) | 1985-03-07 | 1985-03-07 | An inverse differential casing cementing float valve |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2172031B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2236783A (en) * | 1989-10-03 | 1991-04-17 | Stirling Design Int | The control of `u' tubing in the flow of cement in oil well casings |
| US5092406A (en) * | 1990-01-09 | 1992-03-03 | Baker Hughes Incorporated | Apparatus for controlling well cementing operation |
| EP2535508A1 (en) * | 2007-04-04 | 2012-12-19 | Weatherford/Lamb Inc. | Downhole deployment valves |
-
1985
- 1985-03-07 GB GB08505890A patent/GB2172031B/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2236783A (en) * | 1989-10-03 | 1991-04-17 | Stirling Design Int | The control of `u' tubing in the flow of cement in oil well casings |
| US5062481A (en) * | 1989-10-03 | 1991-11-05 | Sterling Design International | Control of `U` tubing in the flow of cement in oil well casings |
| US5092406A (en) * | 1990-01-09 | 1992-03-03 | Baker Hughes Incorporated | Apparatus for controlling well cementing operation |
| EP2535508A1 (en) * | 2007-04-04 | 2012-12-19 | Weatherford/Lamb Inc. | Downhole deployment valves |
| US8522878B2 (en) | 2007-04-04 | 2013-09-03 | Weatherford/Lamb, Inc. | Downhole deployment valves |
| US8534362B2 (en) | 2007-04-04 | 2013-09-17 | Weatherford/Lamb, Inc. | Downhole deployment valves |
| US8544549B2 (en) | 2007-04-04 | 2013-10-01 | Weatherford/Lamb, Inc. | Downhole deployment valves |
| US8789603B2 (en) | 2007-04-04 | 2014-07-29 | Weatherford/Lamb, Inc. | Downhole deployment valves |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8505890D0 (en) | 1985-04-11 |
| GB2172031B (en) | 1988-03-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |