Coiled tubing inflatable packer with circulating port

Details Coiled tubing inflatable packer with circulating port Coiled tubing inflatable packer with circulating port

E - Fixed Constructions

21

B

E21B 33/127 (2006.01) E21B 23/00 (2006.01) E21B 33/124 (2006.01) E21B 34/12 (2006.01)

Patent

CA 2106699

A packer apparatus with a circulating port. A housing of the packer has inflation passages, circulating passages, treating fluid passages, and equalizing passages defined therein. In a straddle packer embodiment, upper and lower packers are mounted on the housing on opposite sides of an outlet of the treating fluid passage. A circulation valve with a sliding differential pressure actuated valve sleeve is disposed below the packers. An inner mandrel is slidably received in the central opening of the housing. The mandrel has a mandrel bore and has upper inflation and circulating ports, lower inflation ports, upper and lower equalizing ports, a treating port and lower circulating ports, all of which communicate with the mandrel bore. The valve sleeve has a valve port. A lug and endless J-slot is operably associated with the housing and mandrel for controlling a telescoping position of the mandrel relative to the housing in response to reciprocation without rotation of the mandrel relative to the housing. The mandrel may also be used to lock the valve sleeve in a closed position. The lug and J-slot define a repeatable sequence of inflating (or deflating) position, intermediate position, circulating position, treating position, equalizing position, and ready position wherein the tool is ready to return to the original inflating position on the next telescoping stroke of the mandrel within the housing.

Packer comportant un orifice de circulation. Le tube du packer comprend des passages de gonflage, de circulation, de fluide de traitement et d'égalisation. Dans un packer d'intervalles, les packers supérieur et inférieur sont installés dans le tube sur les côtés opposés d'une sortie du passage de fluide de traitement. Une soupape de circulation comportant un manchon coulissant actionné par la pression différentielle est placée sous les packers. Un mandrin interne alésé coulisse dans l'ouverture centrale du tube et comporte des orifices de gonflage et de circulation en partie supérieure, des orifices de gonflage inférieurs, des orifices d'égalisation supérieur et inférieur, un orifice de traitement et des orifices de circulation inférieurs, qui communiquent tous avec le mandrin. Le manchon de la soupape comporte un orifice. Un ergot et une rainure en J infinie sont reliés de façon opérationnelle au tube et au mandrin et commandent la position télescopique du mandrin par rapport au tube en réponse au va-et-vient sans rotation du mandrin dans le tube. Le mandrin permet aussi verrouiller le manchon en position fermée. L'ergot et la rainure en J définissent une séquence répétée de positions de gonflage (ou de dégonflage), intermédiaire, de circulation, de traitement, d'égalisation et d'attente, au cours de laquelle l'outil est prêt à retourner à la position initiale de gonflage pendant la course du mandrin à l'intérieur du tube.

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