Type H Back Pressure Valve/Two-Way Check Valve
TYPE H BACK PRESSURE VALVE & TWO-WAY CHECK VALVE & ASSOCIATED TOOLS
TABLE OF CONTENTS TABLE OF CONTENTS .................. ........................... .................. .................. ................... ................... .................. .................. ................... ................... .................. .................. ................... ................... ..................1 .........1 1.0
INTRODUCTION INTRODUCTION .................. ........................... .................. ................... ................... .................. .................. ................... ................... .................. .................. ................. ................. ................... ................... ........... 2
2.0
BACK PRESSURE VALVES, TREE TEST PLUGS & ASSOCIATED ASSOCIATED TOOLS.......................... TOOLS................................... .................. ..................3 .........3
3.0
LUBRICATORS LUBRICATORS ................... ............................ ................... ................... .................. ................... ................... ................... ................... .................. .................. .................. ................... ................... ..................5 .........5
4.0
DRY ROD OPERATIONS - TYPE H BPV & TWCV ................................ ............... ................. ................................. ................ ................. ........................... ................ ........... 14
WARNING: THIS INFORMATION IS PROVIDED TO FMC CUSTOMERS SOLELY TO ILLUSTRATE THE OPERATION OF FMC EQUIPMENT. IT DOES NOT PROVIDE COMPLETE INFORMATION FOR SERVICE OR MAINTENANCE. IMPROPERLY PERFORMED SERVICE MAINTENANCE OR INSTALLATION COULD CAUSE SERIOUS INJURY OR DEATH. FMC EQUIPMENT IS TO BE INSTALLED SERVICED AND MAINTAINED ONLY BY TRAINED, AUTHORIZED AUTHORIZED FMC PERSONNEL. PERSONNEL.
PAGE 1/17
Type H Back Pressure Valve/Two-Way Check Valve
Description/Function/Procedures 1.0
Introduction The information and procedures that follow serve as a reference and guide to the installation of the Back Pressure Valves and Two Way Check Valves, and associated tools utilized by FMC in the field. The tools that will be discussed in this section will include:
•
Type H Back Pressure Valve
•
Type H Two Way Check Valve (TWCV)
•
Type H Running and Retrieval Tools
•
Pressure Balanced Manually Operated (PBMO) Lubricator
NOTE: This information does not include past generations of equipment that are considered obsolete. Hence, the IS BPV and all associated IS running and retrieval tools are not a part of this procedure. NOTE: This information will not, in itself, assure competence. Competence can be achieved only through experience, training and assessment by an experienced assessor. A back pressure valve (BPV) is a device which seats in a tubing hanger or coupling to seal the well bore while the blowout preventers are removed and the tree is installed. BPVs are also used to temporarily isolate the tree from well pressure for repairs, without killing the well. NOTE: BPVs are not intended to be used as the primary device to isolate a tree component from pressure during repairs.
Back pressure valves are installed in four different ways. The method used depends on when the BPV is installed (a.) (b.)
Manually on the Rig Floor Manually using sucker rods
Warning: It is possible for grease and or freezable fluids to cause the bleed through features of the Type H TWCV to become inoperable. If this occurs, the personnel may not be aware of possible pressure build from below. Pressure may not escape in certain severe conditions. FMC advises the use of a hydraulic or PBMO lubricator when retrieving tree test plugs. A two way check valve (TWCV) (Type H) is a device that is similar to a Tree test plug (TTP) in that it seats in a tubing hanger or coupling in order to test the Xmas tree. One key difference in the TWCV as compared to the TTP is that it is threaded and must be rotated into place. Also, the TWCV will hold pressure from both the above and below. The TWCV should be used only to test Xmas trees and never to test BOP’s. Should pressure build up while testing BOP’s there will be no way to kill the well because you cannot pump through it.
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Type H Back Pressure Valve/Two-Way Check Valve
2.0
Back Pressure Valve, Two-Way Check Valve & Associated Tools 2.1
Type H Threaded Style BPV The threaded style BPV incorporates internal running threads, external setting threads, and an internal stinger. This style valve must be rotated into a set of mating threads until it seats. This style BPV may not be set with wire line because it must be rotated into position. The type “H” back pressure valve is a threaded style back pressure valve that is designed to hold pressure from the bottom, or well bore only. Cooper/Cameron rates this valve to 20,000 psi WP. It consists of internal female, right hand (RH) running threads that are used in conjunction with the installation tool. The external male acme style threads are left hand (LH) and are used in conjunction with the threads inside a tubing hanger or other receptacle. An internal valve and spring assembly is designed to both seal off well bore pressure as well as release and equalize well bore pressure when off seated. Additionally, the internal valve is designed to allow kill fluids to be pumped through should the need arise. A primary seal ring is located externally just above the male acme threads.
Type “H” Threaded Style BPV
2.2
Type “H” and “HM” Two Way Check Valves The Type “H” two way check valve is designed to plug the tubing in order to test the tree from above and to allow tubing pressure bleed off before removing the plug. Cooper/Cameron rates this valve to 15,000 psi. For 20,000 psi the newer "HM" style two way check valve is to be utilized. PAGE 3/17
Type H Back Pressure Valve/Two-Way Check Valve Both two way check valves utilize a plunger which seals on an upper seat to isolate tubing pressure from the Xmas tree bore. A lower seat is utilized to seal from above. The same running and retrieval tools used to run the type “H” BPV are also used to run these two way check valves. This tool, unlike the type “H” BPV, cannot be pumped through. If tubing displacement is desired, the type “H” BPV must be used first and then replaced by the two way check for testing of the tree.
Type H Two Way Check Valve
Type HM Two Way Check Valve
Caution: FMC does not recommend the use of TWCV’s to test BOP’s. Should pressure build up below these valves during testing, it will be impossible to pump through to kill the well. TWCV’s should be used only to test Xmas trees.
2.3
Type “H” Running Tool The Type “H” running tool is designed to be attached to the bottom of the polished rod of the PBMO type lubricator. It is attached via a large pin that is driven through the socket on the rod bottom and the running tool. The pin is then held in place via a set screw in the running tool that is tightened against the pin. A splined floating threaded ring assembly is incorporated into the lower tool body. This assembly is made up into the internal BPV running threads. A large torque pin is located just above the floating ring assembly. This is used to transfer rod torque into the BPV or Two Way. Check when the Type H BPV is being installed in the tubing hanger.
Type “H” Running Tool
NOTE: This tool is not to be used as a retrieval tool. PAGE 4/17
Type H Back Pressure Valve/Two-Way Check Valve
2.4
Type “H” Retrieval Tool The type “H” Removal Tool is utilized to retrieve the type “H” BPV. It is attached to the lower portion of the lubricator rod in the same manner as the running tool previously described. It is attached via a large pin that is driven through the socket on the rod bottom and the running tool. The pin is then held in place via a set screw in the running tool that is tightened against the pin. The threads located on the bottom of the tool, mate with the internal threads located inside the type “H” BPV or Two Way Check Valve. When rotated to the right, counter clockwise, this tool will remove the BPV from the tubing hanger and retain it so that it can be removed from the well. Type “H” Retrieval Tool
3.0
Lubricator
PAGE 5/17
Type H Back Pressure Valve/Two-Way Check Valve FMC uses two primary lubricators, the FMC Hydraulic Lubricator and the FMC Pressure Balanced Manually Operated Lubricator (PBMO).
3.1
Pressure Balanced Manually Operated Lubricator (PBMO) The FMC "PBMO" lubricator is designed to run and retrieve threaded type back pressure valves. The description and functions that follow pertain to the FMC-Pressure Balanced Manually Operated Lubricator.. Incorporated into the design of this lubricator are the following features; -
Rod marked in 1" increments to assist in installations Polished rod offered in three approximate stroke lengths, 58", 115", 172" 3" acme - 4 pitch adapter threads on bottom of lubricator Protected internal needle valves in the yoke assembly Standard, readily available chevron packing and o-rings Open yoke assembly that allows use of a parmelee wrench to turn rod Porting for placement of manifolds that may be used to monitor and bleed pressure Lifting eyes and clamp for safe and vertical handling 10,000 psi WP, 15,000 psi test
This type of lubricator is designed to be attached to the top of a Xmas tree or other pressure containing devices via the 3" Acme type threads and a suitable xover adapter. The needle valves are designed to isolate and monitor pressure both in the well bore and in the lubricator itself. An open yoke design is provided in the lubricator body to allow the rod to be moved up and down under pressure, as well as turn the rod when running and retrieving a threaded type BPV. Standard Chevron type packing and stuffing box nuts are provided to seal around the rod during the running and retrieving of BPV's. P PBMO Lubricator The upper adapter housings are designed with union connections. These connections consist of a male pin on one end and a female seal pocket that mates with the pin. This design allows for the use of a single housing and a short 58" stroke rod, or other rods and housings with additional stroke lengths of approximately 57" may be added to increase the rod stroke. In other words, the lubricator may be fitted with at least three rod lengths due to the adapter housing's modular design. The lubricator rod may be moved up and down with pressure in the well bore and inside of the lubricator. This is accomplished by having the lower internal needle valve open and the
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Type H Back Pressure Valve/Two-Way Check Valve upper internal needle valve closed, allowing pressure to equalize through out the lubricator to well bore pressures. When this occurs the rod is considered pressure balanced.
PBMO Lubricator When the lower internal needle valve is closed, under pressure, with the rod extended, it is possible to move the rod upwards by simply slowly opening the upper internal needle valve and allowing pressure to escape. By closing the lower internal needle valve, well bore pressure is isolated from the internal parts of the lubricator. By opening the upper internal needle valve, the pressure inside the lubricator is released on the top side of the rod, allowing the well bore pressure to act only on the bottom of the rod and push the rod up. WARNING: If the upper internal needle valve is opened too quickly though, the rod will rise up at a very fast rate, possibly causing damage to the lubricator and severe injury or death to the personnel. NOTE: Ports A and C are shown without pressure manifolds. This lubricator must be run with pressure manifolds in place. A pressure manifold consists of a needle valve, tee, gauge, and needle valve.
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Type H Back Pressure Valve/Two-Way Check Valve NOTE: The lower internal needle valve does not control flow from the well bore out port A. The lower internal needle valve controls flow into the upper body of the lubricator only. WARNING: It is imperative that the personnel of this lubricator be completely aware of its design characteristics. All personnel must be thoroughly trained in its use prior to running it. Failure to thoroughly understand the way this lubricator functions may result in severe injury or death to the personnel.
3.2
PBMO Lubricator / Type H Installation Procedures (1.)
Completely inspect the type H BPV that you intend to run. Ensure the valve has been preset inside a mating BPV receptacle and tested to the working pressure of the equipment you will ultimately be setting it in. Ensure all seals, springs, and threads are in good working order.
(2.)
Completely inspect the type H BPV running tool. Assure it is in working order by presetting it into the BPV.
(3.)
After choosing and assembling the rod; and the appropriate number of adapter housings; assemble the running tool to the bottom of the polished lubricator rod. Ensure the securing pin is flush on both sides of the rod socket after it is driven through the running tool. Run in the Allen head set screw to secure the pin to the running tool and socket.
(4.)
Attach the running tool to the type H BPV by threading it on until it bottoms out. Make up until the running tool is snug. No torque is required.
(5.)
Now measure and record proper spaceout using the following steps: Measure and record the distance from the Xmas tree cap or other attachment point to the starting thread inside the tubing hanger. b. Measure and record the distance from the bottom of your lubricator or (adapter if utilized on bottom of the lubricator), to the lowermost thread on the type H BPV. c. Subtract measurement b above from a. This will indicate the approximate travel required to begin setting the BPV. Assure your PBMO lubricator will stroke at least this length plus 6". d. Record measurement obtained in c. above. a.
Note: These steps are meant to determine how far the lubricator rod must travel after it is made up on the Xmas tree to engage the profile threads in the hanger. (6.)
Close the master valve in the Xmas tree run.
(7.)
Bleed down the Xmas tree above the closed master valve. Assure wing valves are closed and pressure down stream of these valves is completely bleed off. NOTE: It is advisable to assure the wing valves and other down stream valves are locked out to assure they cannot be opened during this operation. This will assure PAGE 8/17
Type H Back Pressure Valve/Two-Way Check Valve pressure will not build up from any source down stream of your operation on the Xmas tree. (8.)
After assuring there is absolutely no pressure on the Xmas tree, remove tree cap, attach the lubricator to the tree and make up pressure tight.
NOTE: Make a note of the position markings on the rod that are visible in the yoke window. NOTE: Ensure the packing glands on the lubricator have been made up tight enough to hold the lubricator rod in place. If these packing glands are not tight, the rod may move downward during installation causing the tool to strike the master valve gate. Be careful to not over tighten the gland nuts as this may damage the packing. (9.)
Attach the parmelee wrench to the rod. Ensure the wrench is attached so that RH rotation may be applied to the rod and so the rod will not move down.
WARNING: Never allow any part of your body to be placed above or below the parmelee wrench or its handle. Should the rod move up or down rapidly at any time, the wrench could cause severe injury or death to the personnel. (10.)
Open both the upper internal and lower internal needle valves on the lubricator.
Important NOTE: At this time attach pressure manifolds to ports A and C. Keep in mind that Port A does not close off when the lower internal needle valve is closed, it is always exposed to well bore pressure. Port A manifold assembly will be used to monitor well bore pressure during the running and retrieval of the BPV. It should consist of a MF needle valve, a nipple, a tee, a gauge 10,000 psi WP, and a down stream MFL needle valve. The outer most valve should be kept closed until such time as you are ready to bleed down well bore pressure. Port B should be kept plugged through out these procedures. (11.)
Attach a pressure source to port C. Open inner and outer manifold valves. Assure port C internal needle valve is also open. Pressure up to well pressure. Monitor for leaks. If leaks are present, bleed down pressure and repair. If no leaks are present, maintain pressure. (See next step)
NOTE: If gas and condensate are present on this well, it is advisable to use a solution of glycol and water or other freeze resistant fluid to complete your test. This will assist in keeping freezing down to a minimum while running or pulling the BPV. (12.)
Close the upper internal needle valve. Ensure the lower internal needle valve stays open and that the outer most needle valve on the lower manifold assembly stays closed until you are ready to bleed down the Xmas tree. This will allow you to monitor well bore pressure during operations.
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Type H Back Pressure Valve/Two-Way Check Valve (13.)
Now with pressure still on the assembly, open the master valve and any other valves that may be closed in the vertical run of the tree.
(14).
Using the parmelee wrench, lower the lubricator rod down into the tree until the BPV makes contact with the first thread in the tubing hanger. Note the inch markings located on the rod while lowering the lubricator rod. Using the measurement obtained in #5 above, be aware of how far the rod must travel in order to make contact with the threads in the tubing hanger. Assure you have stroked the rod down the proper amount by now double checking the rod measurement in the yoke window. Caution: Any rotation of the rod while lowering into the Xmas Tree should be to the right or clockwise. Rotation to the left may cause the running tool to disengage from the BPV
(15.)
After contact is made with the hanger, pull down on the parmelee wrench and at the same time rotate the lubricator rod to the left or counter-clockwise. Watch for a 1/2" downward movement of the rod as the torque pin in the running tool drops down into the groove in the BPV. Check for downward movement of the rod as you rotate and thread the BPV into the hanger. Continue to rotate and count the turns and distance required to completely make up the BPV into the hanger. Apply approximately 50 ft. lbs to the BPV at this time.
(16.)
Using the parmelee wrench, pull up on the rod, disengaging the torque pin from the BPV, and continue to rotate approximately 8 turns to the left or counter-clockwise in order to disengage the running tool from the BPV. Watch for upward movement.
(17.)
The rod may now be pulled back up using the parmelee wrench. The rod may also be actuated back up by using well bore pressure. This is done by closing the lower internal needle valve and then slowly opening the upper internal needle valve and assuring both upper manifold valves are open. This will cause the rod to move up as the pressure below the lower internal needle valve becomes greater than above the valve. The parmelee wrench should be removed should you decided to use this step.
WARNING: Failure to slowly open the upper internal needle valve will cause the rod to move upwards very rapidly. If the rod moves upward too rapidly it may cause severe damage to the lubricator and cause severe injury or death to the personnel. WARNING: Icing at the upper internal needle valve will frequently occur while bleeding down pressure on gas wells. If the valve plugs and then quickly unplugs, the lubricator rod may move up rapidly, causing severe injury or death to the personnel. (18.)
After the rod is moved to its completely up position, check the markings on the lubricator rod to assure it is truly all the way up.
(19.)
Reattach the parmelee wrench to the rod to keep the rod from moving out of the lubricator upon removal. With the upper internal valve still open, slowly open the outer needle valve on the lower manifold, allowing the pressure above the BPV to bleed to zero, thus bleeding the Xmas tree pressure down to zero.
(20.)
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Type H Back Pressure Valve/Two-Way Check Valve
3.3
(21.)
Monitor for leakage past the BPV by observing for leakage through the upper internal needle valve port. Also observe to assure the BPV is completely set. This monitoring should last for at least 5 minutes.
(22).
Close the master valve.
(23.)
Remove the lubricator assembly from the Xmas tree.
(24.)
Replace the Xmas tree cap as required.
PBMO Lubricator / Type H Retrieval Procedures (1.)
Completely inspect the type H BPV retrieval tool that you intend to run. Ensure the tool is compatible with the BPV.
(2.)
After choosing and assembling the rod; and the appropriate number of adapter housings; assemble the retrieval tool to the bottom of the polished lubricator rod. Ensure the securing pin is flush on both sides of the rod socket after it is driven through the retrieval tool. Run in the Allen head set screw to secure the pin to the running tool and socket.
(3.)
Now measure and record proper spaceout using the following steps: Measure and record the distance from the Xmas tree cap or other attachment point to the retrieval thread inside the BPV. b. Measure and record the distance from the bottom of your lubricator or (adapter if utilized on bottom of the lubricator), to the lowermost thread on the retrieval tool. c. Subtract measurement a above from b. This will indicate the approximate travel required to engage the BPV. Assure your PBMO lubricator will stroke at least this length plus 6”. d. Record measurement obtained in c. above. a.
Note: These steps are meant to determine how far the lubricator rod must travel after it is made up on the Xmas tree to engage the retrieval threads in the BPV. (4.)
Close the master valve in the Xmas tree run.
(5.)
Bleed down the Xmas tree above the closed master valve if pressure happens to be present. Assure wing valves are closed with pressure down stream of these valves bleed completely off.
NOTE: It is advisable to assure the wing valves and other down stream valves are locked out to assure they cannot be opened during this operation. This will assure pressure will not build up from any source down stream of your operation on the Xmas tree. (6.)
After assuring there is absolutely no pressure on the Xmas tree, remove tree cap, attach the lubricator to the tree and make up pressure tight.
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Type H Back Pressure Valve/Two-Way Check Valve NOTE: Make a note of the position markings on the rod that are visible in the yoke window. NOTE: Ensure the packing glands on the lubricator have been made up tight enough to hold the lubricator rod in place. If these packing glands are not tight, the rod may move downward during installation causing the retrieval tool to strike the master valve gate. Be careful to not over tighten the gland nuts as this may damage the packing. (7.)
Attach the parmelee wrench to the rod. Ensure the wrench is attached so that RH rotation may be applied to the rod and so the rod will not move down.
WARNING: Never allow any part of your body to be placed above or below the parmelee wrench or its handle. Should the rod move up or down rapidly at any time, the wrench could cause severe injury or death to the personnel. (8.)
Open both the upper internal and lower internal needle valves on the lubricator.
Important NOTE: At this time pressure manifolds to ports A and C. Keep in mind that Port A does not close off when the lower internal needle valve is closed, it is always exposed to well bore pressure. Port A manifold assembly will be used to monitor well bore pressure during the running and retrieval of the BPV. It should consist of a MF needle valve, a nipple, a tee, a gauge 10,000 psi WP, and a down stream MFL needle valve. The outer most valve should be kept closed until such time as you are ready to bleed down well bore pressure. Port B should be kept plugged through out these procedures. (9.)
Attach a pressure source to port C. Open inner and outer manifold valves. Assure port C internal needle valve is also open. Pressure up to well pressure. Monitor for leaks. If leaks are present, bleed down pressure and repair. If no leaks are present, maintain pressure. (See next step)
NOTE: If gas and condensate are present on this well, it is advisable to use a solution of glycol and water or other freeze resistant fluid to complete your test. This will assist in keeping freezing down to a minimum while running or pulling the BPV. (10.)
Close the upper internal needle valve. Ensure the lower internal needle valve stays open and that the outer most needle valve on the lower manifold assembly stays closed until you are ready to bleed down the Xmas tree. This will allow you to monitor well bore pressure during operations.
(11.)
Now with pressure still on the assembly, open the master valve and any other valves that may be closed in the vertical run of the tree.
(12.)
Using the parmelee wrench, lower the lubricator rod down into the tree until the retrieval tool makes contact with the first thread in the BPV. Note the inch markings located on the rod while lowering the lubricator rod. Using the measurement obtained
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Type H Back Pressure Valve/Two-Way Check Valve in #3 above, make sure you are aware of how far the rod must travel in order to make contact with the threads in the BPV. (13.)
After contact is made with the BPV, pull down on the parmelee wrench and at the same time rotate the lubricator rod to the right clockwise. Check for downward movement of the rod as you rotate and thread the retrieval tool into the BPV. Continue to rotate and count the turns and distance required to completely engage the BPV. As the retrieval tool bottoms out you should begin to pick up torque. Apply approximately 50 ft. lbs to the retrieval tool and BPV at this time, still turning to the right. This should then cause the BPV to begin to turn.
NOTE: The polished rod moves down as the retrieval tool engages the BPV or TWCV. At full engagement, the BPV or TWCV begins to disengage from its threads. It is important to note the number of turns applied while downward movement is occurring. If full number of engagement turns is not achieved before the device begins to disengage, this is an indication that there may be an obstruction in the engagement threads. More importantly, this may be an indication that pressure has built up below the BPV or TWCV. In other words, it is possible for pressure below the stinger to hold the stinger up and not allow the retrieval tool to move downward to full engagement. WARNING: Failure to recognize pressure build up below the BPV or TWCV could result in unplanned disengagement of the device which could cause severe injury or death to personnel. Always count turns and measure engagement or disengagement while running or retrieving the BPV or TWCV.
(14.)
Continue to rotate number of required turns to the right or clockwise in order to disengage the BPV from the hanger.
(15.)
The rod may now be pulled back up using the parmelee wrench. The rod may also be actuated back up by using well bore pressure. This is done by closing the lower internal needle valve and then slowly opening the upper internal needle valve assuring the outer manifold valves are also open. This will cause the rod to move up as the pressure below the lower internal needle valve becomes greater than above the valve. The parmelee wrench should be removed if you use this step.
WARNING: Failure to slowly open the upper internal needle valve will cause the rod to move upwards very rapidly. If the rod moves upward too rapidly it may cause severe damage to the lubricator and cause severe injury or death to the personnel. WARNING: Icing at the upper internal needle valve will frequently occur while bleeding down pressure on gas wells. If the valve plugs and then quickly unplugs, the lubricator rod may move up rapidly, causing severe injury or death to the personnel. (16.) (17.)
After the rod is moved to its completely up position, check the markings on the lubricator rod to assure it is truly all the way up. Then close the master valve. Reattach the parmelee wrench to the rod.
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Type H Back Pressure Valve/Two-Way Check Valve (18.)
With the upper internal valve still open, slowly open the outer needle valve on the lower manifold allowing the pressure above the closed master valve to bleed to zero.
(19.)
Remove the lubricator and BPV and retrieval tool assembly from the Xmas tree.
(20.)
Replace the Xmas tree cap as required.
WARNING: Unless you are absolutely sure that the BPV or TWCV does not have pressure under it, do not attempt to pull the BPV or TWC with only a rod and pulling tool. Failure to off seat the mud valve when pressure is present and then allowing the BPV or TWC or disengage will result in severe injury or death to the personnel as the tools rapidly depart the well bore. FMC strongly recommends using the PBMO lubricator when running and retrieving BPV’s or TWCV’s.
4.0
Dry Rod Operations - Type H BPV & TWCV 4.1
Dry Rod Operations - Running With Rods and Jars
NOTE:
These procedures are general running procedures for operations involving the running of a TWCV or TYPE H BPV through an Xmas Tree or a (TYPE H BPV only through a BOP Stack). Remember that a TWCV must not be used to test BOP’s, PAGE 14/17
Type H Back Pressure Valve/Two-Way Check Valve hence the TYPE H BPV is the only tool that will be run and landed through BOP’s. These procedures are provided with emphasis on BOP operations. (1.)
Ensure the TYPE H BPV is ready for installation.
(2.)
Attach the rods to the TYPE H BPV running tool to space out the distance from the rig floor or tree to the hanger or coupling.
(3.)
Measure and record the distance from the rig floor or top of the tree to the tubing hanger or coupling locking threads.
(4.)
When possible, hang the TYPE H BPV assembly next to the wellhead or tree until the TYPE H BPV dogs align with the locking threads in the hanger or coupling. Make a reference mark on the rod. Add for TYPE H BPV mandrel travel, then make a second mark on the rod.
(5.)
If space is a problem, lay the TYPE H BPV assembly down and transfer the measurements to the assembly.
(6.)
Lower the TYPE H BPV assembly through the tree or BOPs until the valve enters the hanger or coupling and stops.
(7.)
Check the reference mark to assure BPV is in proper position. .
(8.)
With the Type H BPV now resting on the locking threads, begin rotating the rods counterclockwise. Watch for ½” of downward rod movement as the torque pin in running tool drops down into grove in BPV. Count turns and watch for continued downward rod movement as the Type H BPV is threaded into position. Continue turning until full engagement is made.
(9.) Pick up on the running string and continue rotating to the left, counting turns, to disengage the Type H Running tool. Assure proper number of turns and upward movement is occurring while picking up. (10.) Retrieve the running tool by lifting straight up.
4.2
Dry Rod Operations - Retrieving With Rods and Jars NOTE: These procedures are general running procedures for operations involving the running of a TWCV or TYPE H BPV through an Xmas Tree or a (TYPE H BPV only through a BOP Stack). It is recommended that the Tree Bore Centralizer be used when running through an Xmas tree. Use of the BOP Centralizer is mandatory when pulling a TYPE H BPV through the BOP’s. Remember that a TWCV is not to be used to test
PAGE 15/17
Type H Back Pressure Valve/Two-Way Check Valve BOP’s, hence the TYPE H BPV is the only tool that will be run and landed through BOP’s. These procedures are provided with emphasis on BOP operations. WARNING: The TYPE H BPV may be retrieved from the tubing hanger or coupling by hand as long as there is no pressure under the back pressure valve. Usually this is before the well is completed. However, it is possible for gas to break through the mud or kill fluid and build up behind the TYPE H BPV. Always observe for pressure during the retrieval process by listening for escaping pressure. If no pressure is present, the valve should be retrieved immediately with the Type H BPV retrieval tool. Failure to comply with these procedures may result in severe injury or death to personnel. WARNING: FMC recommends that ALL Back Pressure valves be retrieved through BOP’s by using a lubricator. In the event that a lubricator is not available or is impractical, it is mandatory that the BOP Centralizer be utilized in the retrieval string. DANGER: Never allow your head or body to be placed directly over the bore of a well when retrieving a TYPE H BPV manually with rods. Always keep rods long enough so they will extend well above your head during the pulling operation. These are to never be run or retrieved on soft line or "cat line." Failure to comply with these procedures may result in severe injury or death. (1.)
Attach a string of rods and the BOP Centralizer to the Type H BPV retrieval tool. Ensure the string will extend well above your head after the assembly is seated on the TYPE H BPV with the jars in the full down position.
NOTE: It is important that the BOP Centralizer be spaced out such that it will not bottom out on the hanger neck and such that it will end up below the target pipe or annular ram that will be closed above it. More detailed running and space out procedures are contained in Engineering Bulletin # W-060 & W-063 & Q00162. Please refer to those procedures for additional information. (2.)
Check the records for the distance from the rig floor or tree to the TYPE H BPV. (Again, the TWCV must be set only in Xmas Trees and not in BOP’s.)
(3.)
Mark the measurement on the rod that the Type H Retrieval Tool will engage the Type H BPV. (Or TWCV in Xmas Tree.)
(4.)
Lower the assembly into the well bore until the retrieval tool is just below the lowermost target pipe rams. Have the driller slowly close the rams.
(5.)
Continue to lower the retrieval tool on top of the Type H BPV and begin rotating to the right, counting turns and observing for downward movement while listening for escaping gas.
(6.)
If gas is escaping, pull back out of the hole and advise the company man that the well is not dead and that the well must be killed or that a lubricator must be utilized to proceed further.
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Type H Back Pressure Valve/Two-Way Check Valve DANGER: If gas is heard escaping or fluid is coming out, the well is not dead. Given that you are now stung into the TYPE H BPV you will have to either let the gas bleed down and then pull with the ram still closed, or you will be forced to pull the TYPE H BPV with pressure still escaping. In either event, this is an extremely dangerous situation. Ensure you clear the rig floor of all but essential personnel and inform the Driller and Company man that the TYPE H BPV may disengage to the target pipe ram upon pulling. Stay well away from the rotary table and assure that when the valve is pulled, it is pulled with the air hoist remotely. Failure to comply with these instructions could result in severe injury or death to personnel. (7.)
Continue rotating to the right counting turns and watching for movement down while engaging the valve with the retrieval tool.
(8.)
Continue rotating to the right counting turns and watching for movement up while disengaging the Type H BPV from the locking threads.
(9.)
Pull up on the rod string to confirm that it has been properly released.
(10.) Now open the pipe rams and retrieve the string.
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