US2010326670A1PendingUtilityA1

Lift wash-through facility

40
Assignee: ZEITECS BVPriority: Jun 29, 2009Filed: Jun 29, 2009Published: Dec 30, 2010
Est. expiryJun 29, 2029(~3 yrs left)· nominal 20-yr term from priority
E21B 37/00E21B 43/126
40
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Claims

Abstract

An apparatus for pumping fluid, the apparatus including a pump housing including a plunger connected to a terminal end of a coiled tubing and a first port. The apparatus further including the plunger configured to move longitudinally upward and downward, wherein the plunger includes a second port and a surface pumping unit configured to modulate between two modes, a first mode configured to limit a stroke length of the plunger so that the first and second ports do not engage, and a second mode wherein the first and second ports engage. Also, a method for pumping fluid into a wellbore using an apparatus, the method comprising inserting a housing including a coiled tubing and a plunger into the wellbore, wherein the plunger is located at a terminal end of the coiled tubing, and wherein the housing includes a first port and a plunger includes a second port. The method further including moving the plunger longitudinally upward and downward within the housing wherein a stroke length of the plunger is limited during the moving the plunger and extracting fluid from the wellbore. The method further including extracting fluid from the wellbore, pulling the plunger longitudinally upward until the first and second ports are aligned, and circulating fluid into the wellbore through the coiled rubbing and first and second ports discharging into an annulus of the wellbore.

Claims

exact text as granted — not AI-modified
1 . An apparatus for pumping fluid, comprising:
 a pump housing comprising:
 a plunger connected to a terminal end of a coiled tubing, and 
 a first port; 
   the plunger configured to move longitudinally upward and downward, wherein the plunger comprises a second port; and   a surface pumping unit configured to modulate between two modes, a first mode configured to limit a stroke length of the plunger so that the first and second ports do not engage, and a second mode wherein the first and second ports engage.   
     
     
         2 . The apparatus of  claim 1 , wherein the first port comprises a first profile on the inner surface of the housing. 
     
     
         3 . The apparatus of  claim 2 , wherein the second port comprise a second profile on the outer surface of the plunger. 
     
     
         4 . The apparatus of  claim 3 , wherein the first and second profiles are configured to align when the apparatus is in the second mode. 
     
     
         5 . The apparatus of  claim 1 , wherein the stroke length of the plunger is adjusted by modifying parameters of the surface pumping unit. 
     
     
         6 . The apparatus of  claim 5 , wherein parameter comprises a grip location. 
     
     
         7 . The apparatus of  claim 6 , wherein the grip location decreases a length of the coiled tubing that is disposed in a wellbore. 
     
     
         8 . The apparatus of  claim 7 , wherein well treatment fluids comprise one selected from a group consisting of acids, chemicals, corrosion inhibitors, surfactants, and heated fluid treatments. 
     
     
         9 . The apparatus of  claim 1 , wherein the plunger is stationary in circulation mode. 
     
     
         10 . The apparatus of  claim 1 , further comprising a swivel configured to allow alignment of the first and second ports. 
     
     
         11 . A method for pumping fluid into a wellbore using an apparatus, comprising:
 inserting a housing comprising a coiled tubing and a plunger into the wellbore, wherein the plunger is located at a terminal end of the coiled tubing,   wherein the housing comprises a first port and the plunger comprises a second port;   moving the plunger longitudinally upward and downward within the housing, wherein a stroke length of the plunger is limited during the moving the plunger;   extracting fluid from the wellbore;   pulling the plunger longitudinally upward until the first and second ports are aligned; and   circulating fluid into the wellbore through the coiled tubing and first and second ports discharging into an annulus of the wellbore.   
     
     
         12 . The method of  claim 11 , wherein fluid comprises well treatment fluid. 
     
     
         13 . The method of  claim 12 , wherein well treatment fluids comprise one selected from a group consisting of acids, polymers, corrosion inhibitors, surfactants, and heated fluid treatments. 
     
     
         14 . The method of  claim 11 , wherein the plunger is stationary in circulation mode. 
     
     
         15 . The method of  claim 11 , wherein the stroke length of the plunger is adjusted by modifying parameters of a surface pumping unit. 
     
     
         16 . The method of  claim 11 , further comprising adjusting a grip of the surface pumping unit to change a location along a length of the coiled tubing where the surface pumping unit holds the coiled tubing. 
     
     
         17 . The method of  claim 11 , wherein the housing comprises a swivel. 
     
     
         18 . The method of  claim 17 , further comprising rotating a swivel to align the first port and second port. 
     
     
         19 . The method of  claim 11 , further comprising closing an annulus of the wellbore, and pumping fluid into formation.

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