Rotating overshot guide

Abstract

Examples of methods and systems are disclosed. The systems may include an overshot including a tubular housing comprising a bore and configured to transfer a fluid flow through the bore. The overshot may also include a rotatable housing extending in a direction of a central axis of the tubular housing. The rotatable housing may be configured to receive the fluid flow and be driven by the fluid flow to have rotational motion about the central axis. The rotatable housing may be also configured to receive a fish and rotate and displace the fish towards the tubular housing. The overshot may further include a gripping mechanism disposed within the bore and configured to receive and engage with the rotated fish. The overshot may still further include a bearing disposed between the tubular housing and the rotatable housing and configured to decouple rotational motion of the rotatable housing and the tubular housing.

What is claimed is: 
     
         1 . An overshot comprising:
 a tubular housing comprising a bore, a first end, and a second end, and configured to transfer a fluid flow through the bore from the first end to the second end;   a rotatable housing extending in a direction of a central axis of the tubular housing, comprising a third end and a fourth end, wherein the rotatable housing is configured to:
 receive the fluid flow at the third end, 
 be driven by the fluid flow to have rotational motion about the central axis, 
 receive a fish at the fourth end, and 
 rotate and displace the fish towards the tubular housing; 
   a gripping mechanism disposed within the bore and configured to receive and engage with the rotated fish; and   a bearing disposed between the tubular housing and the rotatable housing and configured to decouple rotational motion of the rotatable housing and the tubular housing.   
     
     
         2 . The overshot of  claim 1 , further comprising:
 a plurality of blades attached to an interior surface of the rotatable housing, and configured to be displaced by the fluid flow in a rotational motion about the central axis.   
     
     
         3 . The overshot of  claim 2 , wherein the blades are attached to form during rotational motion a first opening towards the third end and a second opening towards the fourth end; wherein the second opening is larger than the first opening. 
     
     
         4 . The overshot of  claim 2 , wherein one or more of the plurality of blades is attached to an interior surface of the rotatable housing with one or more springs. 
     
     
         5 . The overshot of  claim 2 , wherein a chord of one or more of the plurality of blades is in a radial direction of the rotatable housing. 
     
     
         6 . The overshot of  claim 2 , wherein a cross section of one or more of the plurality of blades varies with a length of the blade. 
     
     
         7 . The overshot of  claim 2 , wherein the direction of a length of one or more of the plurality of blades and the direction of the central axis of the tubular housing lie in a same spatial plane. 
     
     
         8 . The overshot of  claim 1 , wherein the gripping mechanism comprises a spiral grapple having a central opening to receive the rotated fish and is operable to grip the fish. 
     
     
         9 . A system comprising:
 an overshot comprising:
 a tubular housing comprising a bore, a first end, and a second end, and configured to transfer a fluid flow through the bore from the first end to the second end, 
 a rotatable housing extending in a direction of a central axis of the tubular housing, comprising a third end and a fourth end, wherein the rotatable housing is configured to:
 receive the fluid flow at the third end; 
 be driven by the fluid flow to have rotational motion about the central axis; 
 receive a fish at the fourth end; and 
 rotate and displace the fish towards the tubular housing, 
 
 a gripping mechanism disposed within the bore and configured to receive and engage with the rotated fish, and 
 a bearing disposed between the tubular housing and the rotatable housing and configured to decouple rotational motion of the rotatable housing and the tubular housing; 
   an adapter attached to the first end the tubular housing of the overshot; and   a conduit fluidly connected to the tubular housing in the adapter and configured to movably dispose the overshot in a wellbore.   
     
     
         10 . The system of  claim 9 , further comprising a pump configured to supply the fluid flow into the conduit. 
     
     
         11 . The system of  claim 9 , further comprising a control system configured to:
 monitor a distance between the overshot and the fish, and   control a speed of approach of the overshot based on the distance.   
     
     
         12 . The system of  claim 11 , wherein the control system is further configured to determine if the overshot is in contact with the fish. 
     
     
         13 . A method comprising:
 running an overshot into a wellbore connected to a conduit;   supplying a fluid flow to the overshot through the conduit;   transferring the fluid flow through a bore of a tubular housing from a first end to a second end;   receiving, by a rotatable housing extending in a direction of a central axis of the tubular housing, the fluid flow at a third end;   driving, by the fluid flow, rotational motion of the rotatable housing about the central axis;   receiving a fish at a fourth end;   rotating and displacing the fish towards the tubular housing;   receiving and engaging the rotated fish with a gripping mechanism disposed within the bore; and   removing the overshot with the engaged fish from the wellbore.   
     
     
         14 . The method of  claim 13 , wherein engaging the rotated fish comprises receiving and gripping the rotated fish with a grapple disposed within the bore of the tubular housing. 
     
     
         15 . The method of  claim 13 , further comprising:
 monitoring, by a control system, a distance between the overshot and the fish; and   controlling, by the control system, a speed of approach of the overshot based on the distance.   
     
     
         16 . The method of  claim 13 , further comprising pumping a fluid into the conduit to supply the fluid flow to the overshot. 
     
     
         17 . The method of  claim 16 , further comprising determining, by a control system and before pumping the fluid, if the overshot is in contact with the fish. 
     
     
         18 . The method of  claim 13 , wherein rotating the rotatable housing comprises the fluid flow displacing a plurality of blades in a rotational motion about the central axis, wherein each of the plurality of blades is attached to an interior surface of the rotatable housing. 
     
     
         19 . The method of  claim 18 , wherein displacing the fish comprises passing a top of the fish from a first opening and a second opening, wherein the second opening is larger than the first opening, and wherein the first and second openings are formed by the rotational motion of the plurality of blades. 
     
     
         20 . The method of  claim 13 , further comprising connecting the overshot to the conduit via an adapter attached to the first end of the tubular housing.