Rfid device for use downhole

Abstract

In one embodiment, a radio-frequency identification device for use in a wellbore includes a housing made of a polymer; and an antenna disposed in the housing. The polymer may be selected from the group consisting of an elastomer, a plastic, a rubber, a thermoplastic elastomer, and combinations thereof. The RFID device may also include a fill material disposed in the housing.

1 . A radio-frequency identification device for use in a wellbore, comprising:
 a housing made of a polymer; and   an antenna disposed in the housing.   
     
     
         2 . The device of  claim 1 , wherein the polymer is selected from the group consisting of an elastomer, a plastic, a rubber, a thermoplastic elastomer, and combinations thereof. 
     
     
         3 . The device of  claim 1 , wherein the polymer is selected from the group consisting of polyether ether ketone, nylon, polyphenylene sulfide, polytetrafluoroethylene, and combinations thereof. 
     
     
         4 . The device of  claim 1 , wherein the polymer is made from a material that allows the transmission of a radio frequency signal. 
     
     
         5 . The device of  claim 1 , further comprising a fill material disposed in the housing. 
     
     
         6 . The device of  claim 5 , wherein the fill material is selected from the group consisting of oil, epoxy, and silicone. 
     
     
         7 . The device of  claim 5 , further comprising a carrier. 
     
     
         8 . The device of  claim 1 , further comprising a carrier. 
     
     
         9 . The device of  claim 1 , wherein the device is operable at a pressure level above 18,500 psi. 
     
     
         10 . A method of drilling a wellbore, comprising:
 running a drilling assembly into the wellbore through a casing string, the drilling assembly having a tubular string, a first underreamer, a second underreamer, and a drill bit;   injecting drilling fluid through the tubular string and rotating the drill bit, wherein at least one of the first and second underreamers remain locked in a retracted position;   sending a first instruction signal to the first underreamer using a radio-frequency identification device as claimed in  claim 1 , thereby extending the first underreamer;   drilling and reaming the wellbore using the drill bit and the first underreamer;   sending a second instruction signal to the second underreamer to extend second underreamer; and   reaming the wellbore using the second underreamer.   
     
     
         11 . The method of  claim 10 , wherein the first underreamer is located above the second underreamer. 
     
     
         12 . The method of  claim 10 , wherein the second instruction signal comprises a modulated command. 
     
     
         13 . The method of  claim 12 , wherein the modulated command is selected from the group consisting of a modulated pressure command, a modulated flow rate command, a modulated angular speed command, and combinations thereof. 
     
     
         14 . The method of  claim 13 , wherein the second underreamer is located below a restriction. 
     
     
         15 . A method of drilling a wellbore, comprising:
 running a drilling assembly into the wellbore through a casing string, the drilling assembly comprising a tubular string, a MWD tool or LWD tool, a first underreamer, a second underreamer, and a drill bit;   injecting drilling fluid through the tubular string and rotating the drill bit, wherein at least one of the first and second underreamers remain locked in the retracted position;   sending an instruction signal to the first underreamer, thereby extending the first underreamer; and   reaming the wellbore using the first underreamer.   
     
     
         16 . The method of  claim 15 , wherein sending the instruction signal comprises sending a RFID tag. 
     
     
         17 . The method of  claim 16 , wherein the RFID tag includes:
 a housing made of a polymer; and   an antenna dispose in the housing.   
     
     
         18 . The method of  claim 16 , wherein the first underreamer is located below the MWD tool or LWD tool. 
     
     
         19 . The method of  claim 18 , wherein the RFID tag flows past the MWD tool or LWD tool and is received by the first underreamer. 
     
     
         20 . The method of  claim 15 , wherein the instruction signal is sent via modulation of a rotational speed of the drilling assembly, modulation of a drilling fluid flow rate, or modulation of a drilling fluid pressure. 
     
     
         21 . The method of  claim 20 , further comprising encoding the modulation of the drilling fluid pressure or the drilling fluid flow rate with a sequence number. 
     
     
         22 . The method of  claim 20 , further comprising associating a sequence number of the instruction signal to an actuation time of the first underreamer. 
     
     
         23 . The method of  claim 20 , further comprising sending a second instruction signal to the second underreamer. 
     
     
         24 . The method of  claim 23 , wherein the second instruction signal is sent before the instruction signal to the first underreamer. 
     
     
         25 . The method of  claim 24 , wherein the second instruction signal is sent using a RFID tag.