CA2177088A1 - Positive pressure release valve - Google Patents
Positive pressure release valveInfo
- Publication number
- CA2177088A1 CA2177088A1 CA002177088A CA2177088A CA2177088A1 CA 2177088 A1 CA2177088 A1 CA 2177088A1 CA 002177088 A CA002177088 A CA 002177088A CA 2177088 A CA2177088 A CA 2177088A CA 2177088 A1 CA2177088 A1 CA 2177088A1
- Authority
- CA
- Canada
- Prior art keywords
- release valve
- web
- pipe
- circulation
- once
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 7
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 150000002430 hydrocarbons Chemical class 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 15
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000792 Monel Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 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)
- Earth Drilling (AREA)
Abstract
In the oil industry, positive displacement motors are attached to the bottom hole assembly(BHA) mechanism to provide additional power to the bit. The motor is turned through the hydraulic force of the drilling fluids that are circulated within the drill string. However, once the bottom hole assembly becomes blocked, fluid can no longer circulate through the bit and back to surface.
Serious problems arise as a result of this loss in circulation . In severe situations, this condition makes it possible to break off and lose the drilling pipe in the well bore.
The need for a remotely activated release valve to restore circulation within the well is critical.
The technical knowledge disclosed within this application relates to a mechanical device that is designed to release the fluid trapped inside the drilling pipe once the bottom hole assembly has become blocked, thereby restoring circulation..
The Positive Pressure Release Valve is activated through a increase in fluid pressure created by the surface pumps. Once a certain internal pipe pressure is achieved, the release valves are permanently released and circulation is restored within the pipe and well bore.
The drill pipe is now in a position to be removed with minimal interruption and damage.
Serious problems arise as a result of this loss in circulation . In severe situations, this condition makes it possible to break off and lose the drilling pipe in the well bore.
The need for a remotely activated release valve to restore circulation within the well is critical.
The technical knowledge disclosed within this application relates to a mechanical device that is designed to release the fluid trapped inside the drilling pipe once the bottom hole assembly has become blocked, thereby restoring circulation..
The Positive Pressure Release Valve is activated through a increase in fluid pressure created by the surface pumps. Once a certain internal pipe pressure is achieved, the release valves are permanently released and circulation is restored within the pipe and well bore.
The drill pipe is now in a position to be removed with minimal interruption and damage.
Description
2 ! 77088 SPECIFICATIONS:
Field of Invention:
This invention relates to ~ihlAtinn~ that occur when drilling operations become hindered by a blocked bottom hole assembly(BHA). Under normal drilling operations, surface pumps pl~S:!iul~;
the drilling fluid to applu~ ldlely 500 psi under normal situations, with a IllAXi.u..~ pumping plt;S~Ult; of around 3,000 psi. Under these conditions, the flow through the motor and the bit provides enough of a ples~ult; drop so as to allow the fluid circulation to be controlled. This circulation is critical since the drilling fluid has to perform several fimction~ The most important of these is to remove the drill cutting from the bit and well bore. The second fiunction is to provide power to the hydraulic motor in the BHA.
In the event the BHA becomes blocked there are two problems that effect the retrieval of the drilling pipe. The most important is the li~ ial p.~s~u-~; created at the bottom of the hole when the pipe is pulled back to surface. This force might be so great that either the rig cannot pull the pipe out of the hole, or the drilling pipe itself might break. The second problem is the ~ itinnAl time required to catch the fluid trapped within the pipe every time the sections are broken apart, this is known in the industry as a "wet" trip.
The Positive Pressure Release Valve is an il,lpol~u-l safety device for the drilling pipe that provides insurance against allowing the pipe becoming stuck as a result of a blocked downhole motor. In addition to the drill string and the BHA, there are other pieces of eql-ipm~.nt near the BHA that are very expensive, in some cases the MWD tools can run as high as $500,000 to replace. The ability to retrieve this eqllirm~Mt is another important factor that must be taken into consideration should the drill string have to be ~b~n(lnnP~1 2 1 77~88 Description of Prior Art:
Pl~s~ ly existing in the oil industry, is a downhole pl~iS:iUl~ release device the uses pin to hold the release valves in place. Once circulation is blocked, a wireline tool is sent down to shear the pins, thus activating the release valve.
This technology however is outdated, only working in situations that permit the use of gravity assisted wireline tools. In today's drilling ~nvilu~ substantially more wells are being directinn~lly drilled, and the use of gravity assisted wireline tools are limited to hole angles less than 40 degrees (from the true vertical angle being 0 degrees). Many wells today and especially those that encuulll~l blocked circulation are horizontal wells and are therefore unserviceable through the use gravity assisted wireline tools.
A second method of wireline propulsion is through circulating the drilling fluid to push the wireline out into the horizontal section. This method however requires the ability to circulate the drilling fluid, and in ~itll~tinn~ that require this device, this technique is not possible since circulation is blocked.
This obvious limit~tion makes the shear pin pltis~ul~; release valve ineffective in today's modern drilling environment.
Summary of Invention:
The novelty and h~t;nuily of this invention is the ability to remotely trigger the pl~s~ul~ release valve from surface without ever having to physically touch the release m~h~ni~m This saves considerable time in retrieving the blocked motor or other downhole tools, which nltim~tely saves money.
This remote triggering of the release valve takes advantage of the pressule di~~ Lial between the inside of the pipe and the well bore. The plt;s~ulti in the pipe is directly controlled at surface through the pumps. The pressure of the fluid in the well bore is a direct function of the vertical well depth . Since this Lydros~lic pressure is the same inside and outside the drilling pipe, al1l1ition~1 pl~;S~ult; applied to the fluid inside the drill pipe will allow for the lu~lulillg of the release valve.
It is critical to this design that once the release valve has been triggered that it completely remove itself from the valve so as not for further hinder the flow of the fluid. In order for this to be accomplished effectively, there are several factors that need to be taken into consideration:
di~l~ ial pltiSSUI~ across the valve, area of plug, material composition of web, thickness of web and taper angle of the plug.
DESCIPTION OF DRAWINGS:
Figure I . Cross section of pl~iS~w~ release valve Figure 2. Plan view of ples.,w~ release valve Figure 3. Positive Pressure Release Sub 2 1 7708~
**NOTE**
NAMING CONVENTION:
In the context of this application, the followin~ tPrmin~ln~y will be employed. To identify parts that co~ ,ond to the above drawin~s, theY shall be i/lPntifiPd throu~h the followin~ convention. First the drawin~ number, presented in Roman Numerals, and then the Part referenced on that drawin~. For example IIC refers to part C as shown on fi~ure 2.
The concept crucial to this invention is the creation of a web IA that is m~(~hinPd to a precise thi~knPss based on a host material so as to provide a pl~id~ ed amount of strength. ConnPcted to the web is the end plate IB which provides the surface area for the interface between the inside and outside pleSSUIeS. The angle where the plug meets the web is an important pd~ ler since this zone increases the stress applied to the web. In ~d-lition, once the load has Px~eeded the carrying capacity of the web, this taper angle makes sure that the plug does not get caught in the release valve as it is ejected into the well bore. This prevent the release valve from partially opening and llnnecess~rily restricting the fluid flow..
This release valve can be incorporated into any eql-ipmP,nt that is to be ~t~ hPd to the BHA. It is generally recogni7Pd that this release valve will be incol~ol~ted into an insert that is screwed into a special housing contained within a sub, see Figure 2. The insert or multiple inserts incorporated into a downhole tool is referred to as a Pressure Release Sub, see Figure 3.
On incorporating this release valve in a sub, it is important that, should more than one be used, the valves are not placed at the same level. Should the insert be located at the same height in the sub, the re l~1cticn in cross sectil-n~l area will result in serious strength degradation of the tool, possibly causing it to fail.
The insert is not tapered and is secured with a seal at the toe in order to prevent the insert from dislodging itself during operation. The heel of the insert is m~hinr.d to allow a 1/2" drive to tighten and remove the insert from the sub. The 1/2" drive size is the most comm- nly available drive on a rig. This also provides reusability of the Positive Pressure Release Sub by replacing the released valve with on that is new. This will save both time and money.
The thickness of the web that is critical to the ptilro~ ce of the release valve is ~ e~ . l .inFd by the following chart Rating PSI Thirl~nFc~
Field of Invention:
This invention relates to ~ihlAtinn~ that occur when drilling operations become hindered by a blocked bottom hole assembly(BHA). Under normal drilling operations, surface pumps pl~S:!iul~;
the drilling fluid to applu~ ldlely 500 psi under normal situations, with a IllAXi.u..~ pumping plt;S~Ult; of around 3,000 psi. Under these conditions, the flow through the motor and the bit provides enough of a ples~ult; drop so as to allow the fluid circulation to be controlled. This circulation is critical since the drilling fluid has to perform several fimction~ The most important of these is to remove the drill cutting from the bit and well bore. The second fiunction is to provide power to the hydraulic motor in the BHA.
In the event the BHA becomes blocked there are two problems that effect the retrieval of the drilling pipe. The most important is the li~ ial p.~s~u-~; created at the bottom of the hole when the pipe is pulled back to surface. This force might be so great that either the rig cannot pull the pipe out of the hole, or the drilling pipe itself might break. The second problem is the ~ itinnAl time required to catch the fluid trapped within the pipe every time the sections are broken apart, this is known in the industry as a "wet" trip.
The Positive Pressure Release Valve is an il,lpol~u-l safety device for the drilling pipe that provides insurance against allowing the pipe becoming stuck as a result of a blocked downhole motor. In addition to the drill string and the BHA, there are other pieces of eql-ipm~.nt near the BHA that are very expensive, in some cases the MWD tools can run as high as $500,000 to replace. The ability to retrieve this eqllirm~Mt is another important factor that must be taken into consideration should the drill string have to be ~b~n(lnnP~1 2 1 77~88 Description of Prior Art:
Pl~s~ ly existing in the oil industry, is a downhole pl~iS:iUl~ release device the uses pin to hold the release valves in place. Once circulation is blocked, a wireline tool is sent down to shear the pins, thus activating the release valve.
This technology however is outdated, only working in situations that permit the use of gravity assisted wireline tools. In today's drilling ~nvilu~ substantially more wells are being directinn~lly drilled, and the use of gravity assisted wireline tools are limited to hole angles less than 40 degrees (from the true vertical angle being 0 degrees). Many wells today and especially those that encuulll~l blocked circulation are horizontal wells and are therefore unserviceable through the use gravity assisted wireline tools.
A second method of wireline propulsion is through circulating the drilling fluid to push the wireline out into the horizontal section. This method however requires the ability to circulate the drilling fluid, and in ~itll~tinn~ that require this device, this technique is not possible since circulation is blocked.
This obvious limit~tion makes the shear pin pltis~ul~; release valve ineffective in today's modern drilling environment.
Summary of Invention:
The novelty and h~t;nuily of this invention is the ability to remotely trigger the pl~s~ul~ release valve from surface without ever having to physically touch the release m~h~ni~m This saves considerable time in retrieving the blocked motor or other downhole tools, which nltim~tely saves money.
This remote triggering of the release valve takes advantage of the pressule di~~ Lial between the inside of the pipe and the well bore. The plt;s~ulti in the pipe is directly controlled at surface through the pumps. The pressure of the fluid in the well bore is a direct function of the vertical well depth . Since this Lydros~lic pressure is the same inside and outside the drilling pipe, al1l1ition~1 pl~;S~ult; applied to the fluid inside the drill pipe will allow for the lu~lulillg of the release valve.
It is critical to this design that once the release valve has been triggered that it completely remove itself from the valve so as not for further hinder the flow of the fluid. In order for this to be accomplished effectively, there are several factors that need to be taken into consideration:
di~l~ ial pltiSSUI~ across the valve, area of plug, material composition of web, thickness of web and taper angle of the plug.
DESCIPTION OF DRAWINGS:
Figure I . Cross section of pl~iS~w~ release valve Figure 2. Plan view of ples.,w~ release valve Figure 3. Positive Pressure Release Sub 2 1 7708~
**NOTE**
NAMING CONVENTION:
In the context of this application, the followin~ tPrmin~ln~y will be employed. To identify parts that co~ ,ond to the above drawin~s, theY shall be i/lPntifiPd throu~h the followin~ convention. First the drawin~ number, presented in Roman Numerals, and then the Part referenced on that drawin~. For example IIC refers to part C as shown on fi~ure 2.
The concept crucial to this invention is the creation of a web IA that is m~(~hinPd to a precise thi~knPss based on a host material so as to provide a pl~id~ ed amount of strength. ConnPcted to the web is the end plate IB which provides the surface area for the interface between the inside and outside pleSSUIeS. The angle where the plug meets the web is an important pd~ ler since this zone increases the stress applied to the web. In ~d-lition, once the load has Px~eeded the carrying capacity of the web, this taper angle makes sure that the plug does not get caught in the release valve as it is ejected into the well bore. This prevent the release valve from partially opening and llnnecess~rily restricting the fluid flow..
This release valve can be incorporated into any eql-ipmP,nt that is to be ~t~ hPd to the BHA. It is generally recogni7Pd that this release valve will be incol~ol~ted into an insert that is screwed into a special housing contained within a sub, see Figure 2. The insert or multiple inserts incorporated into a downhole tool is referred to as a Pressure Release Sub, see Figure 3.
On incorporating this release valve in a sub, it is important that, should more than one be used, the valves are not placed at the same level. Should the insert be located at the same height in the sub, the re l~1cticn in cross sectil-n~l area will result in serious strength degradation of the tool, possibly causing it to fail.
The insert is not tapered and is secured with a seal at the toe in order to prevent the insert from dislodging itself during operation. The heel of the insert is m~hinr.d to allow a 1/2" drive to tighten and remove the insert from the sub. The 1/2" drive size is the most comm- nly available drive on a rig. This also provides reusability of the Positive Pressure Release Sub by replacing the released valve with on that is new. This will save both time and money.
The thickness of the web that is critical to the ptilro~ ce of the release valve is ~ e~ . l .inFd by the following chart Rating PSI Thirl~nFc~
3,000 0.025 4,000 0.030 5,000 0.035 These values are for 3/4" American standard pipe, brass socket plug, coll~ ial type.
Once the material is cll~ngF~rl the thirl~nes5-strength rel~tion~hir will change accol~ g to the selected material. Other material that may be used with this type of system are:
Stainless steel Monel
Once the material is cll~ngF~rl the thirl~nes5-strength rel~tion~hir will change accol~ g to the selected material. Other material that may be used with this type of system are:
Stainless steel Monel
Claims (7)
1. A Positive Pressure Release valve can be constructed through the information presented within this application.
2. This Positive Pressure Release valve is designed for use in any application that requires a fluid/slurry to be passed down a pipe that is used in the recovery and exploration of hydrocarbons.
3. Primary to Positive Pressure Release valve's design is a plug connected to a web secured in a carrier.
4. The plug is thicker than the web and meets the web with a certain angle. The critical nature of this angle is that it must be less than 90 degrees.
5. The web is defined as a portion of the plug that has been reduced in thickness so as to create a localized increase in stress. This web can be of any width. The thickness of this web when using the American standard pipe brass socket plug is 0.025 inch for 3,000 psi, 0.030 for 4,000 psi and 0.035 for 5,000 psi.
6. The host for the web is called the carrier. This may either be an insert as outlined above, or may be incorporated directly into a supporting structure such as a sub.
7. The Positive Release Valve may incorporate any material, this decision is based upon the operating conditions for the Positive Release Valve. Once the material is changed, the thickness of the web will need to be recalculated and tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002177088A CA2177088A1 (en) | 1996-05-22 | 1996-05-22 | Positive pressure release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002177088A CA2177088A1 (en) | 1996-05-22 | 1996-05-22 | Positive pressure release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2177088A1 true CA2177088A1 (en) | 1997-11-23 |
Family
ID=4158241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002177088A Abandoned CA2177088A1 (en) | 1996-05-22 | 1996-05-22 | Positive pressure release valve |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2177088A1 (en) |
-
1996
- 1996-05-22 CA CA002177088A patent/CA2177088A1/en not_active Abandoned
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6889771B1 (en) | Selective direct and reverse circulation check valve mechanism for coiled tubing | |
| CA2489051C (en) | Filter assembly having a bypass passageway and method | |
| US6467546B2 (en) | Drop ball sub and system of use | |
| CA2255253C (en) | Reduced shock landing collar | |
| EP0613514B1 (en) | Mud check valves in drilling apparatus (wells) | |
| AU2003234673B2 (en) | Method and apparatus to reduce downhole surge pressure using hydrostatic valve | |
| US4962819A (en) | Mud saver valve with replaceable inner sleeve | |
| EP1055798B1 (en) | Apparatus and method for setting a liner by hydraulic pressure | |
| AU2013316198B2 (en) | Improvements in, or related to, float valve hold open devices and methods therefor | |
| US4128108A (en) | Mud retaining valve | |
| EP1307633A1 (en) | Activating ball assembly for use with a by-pass tool in a drill string | |
| KR20040012742A (en) | Method for preventing critical, annular pressure buildup | |
| JP6059368B2 (en) | Annual pressure relief system | |
| EP2699761B1 (en) | Ball valve safety plug | |
| US5782303A (en) | Method and apparatus for draining fluids from tubing | |
| US20180313187A1 (en) | Single body choke line and kill line valves | |
| US4577614A (en) | Advanced quick ball release sub | |
| US6116339A (en) | Running and setting tool for packers | |
| WO1994004790A1 (en) | Protective arrangements for downhole tools | |
| CA2177088A1 (en) | Positive pressure release valve | |
| US20230059642A1 (en) | Float valve for drilling and workover operations | |
| US20100051290A1 (en) | Pressure Actuated Piston Type Casing Fill-up Valve and Methods of Use Thereof | |
| EP0612913A1 (en) | Connector assembly for coiled tubing | |
| US11377928B2 (en) | Downhole isolation valves with pressure relief | |
| CA2487012C (en) | Method and apparatus to reduce downhole surge pressure using hydrostatic valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |