Disclosed is a bypass tool for a tubing string a wellbore. The bypass tool has a tubular body with ports in the body wall to inject fluid into an annulus. An axially shiftable sleeve is mounted to control flow through the ports. Spring-loaded detents in the body engage openings in the sleeve. In ope
Disclosed is a bypass tool for a tubing string a wellbore. The bypass tool has a tubular body with ports in the body wall to inject fluid into an annulus. An axially shiftable sleeve is mounted to control flow through the ports. Spring-loaded detents in the body engage openings in the sleeve. In operation, the bypass tool is run into the wellbore in the closed position with the sleeve closing the ports. When bypass flow is desired, an actuation ball is pumped down the wellbore and engages the detents, unlocking the sleeve to shift to where ports in the sleeve align with ports in the mandrel. To return the bypass tool to the closed position, a second ball of the same diameter as the first ball is pumped down the well to engage and depress the detents to allow the sleeve to shift to a closed position.
대표청구항▼
1. A wellbore bypass tool adapted to be lowered into a wellbore on a tubing string and which is changeable between a circulation position which allows well fluids to flow through the tubing string and a bypass position wherein well fluids are injected into the annulus surrounding the bypass tool, th
1. A wellbore bypass tool adapted to be lowered into a wellbore on a tubing string and which is changeable between a circulation position which allows well fluids to flow through the tubing string and a bypass position wherein well fluids are injected into the annulus surrounding the bypass tool, the tool comprising: an elongated tubular body open at both ends with the ends adapted for connection to the tubing string, an interior fluid passage extending from the upstream end of the tubular member to the open lower end of the tubular member, bypass discharge ports in the wall of the tubular member extending between the interior fluid passage and the exterior of the tubular member;a sleeve having an interior fluid passage extending longitudinally therethrough and being mounted in the tubular member to move in the tubular member into and out of the bypass position permitting flow through the bypass discharge ports; anda pin mounted in the tubular body movable radially between a position engaging the sleeve to hold the sleeve in position against axial movement and a retracted position, permitting movement of the sleeve into and out of the bypass position. 2. The tool of claim 1, wherein a seat is present on the sleeve for receiving an actuation member. 3. The tool of claim 1, wherein the pin has a cam surface on the end of the pin engaging the sleeve. 4. The tool of claim 1, wherein the pin is resiliently urged into contact with the sleeve. 5. The tool of claim 1, wherein a coil spring resiliently urges the pin into contact with the sleeve. 6. The tool of claim 1, wherein the sleeve has a bypass port which when aligned with a bypass discharge port in the body allows fluid to flow through the bypass discharge port. 7. The tool of claim 1, wherein a plurality of spaced shoulders are provided on the sleeve for engagement by the pin. 8. The tool of claim 1, wherein the sleeve is mounted to shift axially in the body. 9. The tool of claim 1, wherein the sleeve has a plurality of bypass ports. 10. A wellbore bypass tool adapted to be lowered into a wellbore on a tubing string and which is changeable between a circulation position which allows well fluids to flow through the tubing string and a bypass position wherein well fluids are injected into the annulus surrounding the bypass tool, the tool comprising: an elongated tubular body open at both ends with the ends adapted for connection to the tubing string, an interior fluid passage extending from the upstream end of the tubular member to the open lower end of the tubular member, bypass discharge ports in the wall of the tubular member extending between the interior fluid passage and the exterior of the tubular member;a sleeve having an interior fluid passage extending longitudinally therethrough and being mounted in the tubular member to move in the tubular member into and out of the bypass position permitting flow through the bypass discharge ports; anda pin mounted in the tubular body movable radially between a position engaging the sleeve to hold the sleeve in position against axial movement and a retracted position, permitting movement of the sleeve into and out of the bypass position and wherein the pin extends into the interior of the sleeve a sufficient distance to engage an actuation member inserted in the sleeve interior passage. 11. The tool of claim 10, wherein the actuation member is a spherical ball. 12. The tool of claim 10, wherein the actuation member has the cross-sectional shape and size to fit tight in the sleeve interior passage. 13. The tool of claim 12, additionally comprising a seat on the sleeve and an actuation member engaging the seat to restrict fluid flow through the sleeve fluid passage and engaging the pin to disengage the pin from the sleeve. 14. A method for flowing fluid from a tubing string into the annulus surrounding the tubing string, the method comprising the steps of: providing a bypass tool having a tubular body with an internal passageway open at both ends of the tool and a bypass passageway extending from the internal passageway to the exterior of the tool, a sleeve mounted in the internal passageway of the body to shift into positions blocking and opening the bypass passageway;connecting the bypass tool to a tubing string with the internal passageway in fluid communication with the tubing sting and the sleeve blocking flow through the bypass passageway;positioning the tubing string in the wellbore and pumping well fluids through the tubing string and the bypass tool;thereafter, moving a first actuation member down the tubing string to the bypass tool to contact the sleeve and shift the sleeve to a position opening the bypass passageway;flowing fluids through the bypass passageway and into the annulus surrounding the tool; andthereafter, moving a second actuation member of substantially the same cross-sectional shape and size as the first actuation member down the tubing string to the bypass tool to contact and shift the sleeve to a position blocking the bypass passageway. 15. The method of claim 14, wherein the two actuation members are spherical shaped and have the same diameter. 16. The method of claim 14, wherein the shifting step additionally comprises using the balls to move spring-loaded pins out of contact with the sleeve to allow the sleeve to shift. 17. The method of claim 14, additionally comprising providing a tool with a seat on the sleeve of a size and shape to mate with the first actuating member. 18. The method of claim 14, additionally comprising passing the fluid flowing through the bypass passageway through one or more nozzles. 19. The method of claim 14, wherein the step of opening a bypass passageway comprises disengaging a movable detent pin, holding the sleeve in place. 20. The method of claim 14, additionally comprising thereafter, moving an additional actuation member of substantially the same cross-sectional shape and size as the first and second actuation members down the tubing string to the bypass tool to contact and additionally shift the sleeve into a position reopening opening the bypass passageway; and thereafter, flowing fluids through the bypass passageway and into the annulus, surrounding the tool.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (29)
Carmichael Mark,GBX, Apparatus and method for circulating fluid in a borehole.
Selinger, Richard; Anderson, Clifford J.; Thicke, Brian R.; Schoettler, Michael F., Method and apparatus for causing pressure variations in a wellbore.
Ferguson, Andrew M.; Loving, Stanley W.; McKinley, Bryan F.; Norman, Dale, Methods and devices for one trip plugging and perforating of oil and gas wells.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.