Non-tubing deployed well artificial lift system
A progressing cavity pump (PCP) system that may be deployed in an existing well configuration without the need for a workover rig. A stator and tubing stop are first set in a conduit, such as production tubing, at a desired depth. In subsequent wireline runs, a pack-off and upper tubing stop are installed above the stator, which results in the stator assembly being set by tubing stops on top and bottom and results in the conduit above the PCP being isolated from the wellbore below. Installation of the system is completed by installing the rotor and by installing top-side drive equipment in the usual way. The PCP system allows the deployment of lift systems within existing well configurations without any element being deployed on tubing and provides the ability to retrofit a well with an insertable pump within existing tubing.
1. A well, comprising:
an existing conduit extending downwardly from a surface;
a tubing stop for selective engagement with said existing conduit;
a progressing cavity pump stator attached to said tubing stop and adapted to be lowered with said tubing stop into said conduit and set in said conduit at a selected depth;
a rotor for deployment within said conduit for locating within said progressing cavity pump stator; and
an upper tubing stop and pack-off adapted to be lowered into said conduit and set above said progressing cavity pump stator in said conduit.
2. A method for deploying a progressing cavity pump comprising the steps of:
lowering a progressing cavity pump stator and attached lower tubing stop into an existing conduit in a well on wireline;
securing said progressing cavity pump stator within said conduit with said attached lower tubing stop;
lowering a pack-off and upper tubing stop into said existing conduit on wireline;
setting said upper tubing stop above said progressing cavity pump stator in said conduit; and
deploying a rotor within said conduit and inserting said rotor within said stator.
3. The method according to claim 2 wherein:
said step of securing said progressing cavity pump stator within said conduit comprises securing said stator to tubing.
4. The method according to claim 2 wherein:
said step of deploying a rotor comprises lowering said rotor on sucker rods.
5. A method of repositioning a progressing cavity pump within a well conduit comprising the steps of:
disengaging gripping surfaces of tubing stops for contact with an inner surface of the conduit;
releasing engagement of said tubing stops with the conduit;
relocating a progressing cavity pump affixed to said tubing stops within said conduit;
engaging said gripping surfaces of said tubing stops with said inner surface of said conduit for securing the progressing cavity pump within said conduit at a desired location.
6. A method for deploying a progressing cavity pump comprising the steps of:
lowering a progressing cavity pump stator and attached lower tubing stop into an existing conduit in a well on sucker rod or wireline;
securing said progressing cavity pump stator within said conduit with said attached lower tubing stop;
lowering a pack-off and upper tubing stop into said existing conduit on sucker rod or wireline;
setting said upper tubing stop above said progressing cavity pump stator in said conduit; and
deploying a rotor within said conduit and inserting said rotor within said stator.
7. The method according to claim 6 wherein:
said step of securing said progressing cavity pump stator within said conduit comprises securing said stator to tubing.
8. The method according to claim 6 wherein: said step of deploying a rotor comprises lowering said rotor on sucker rods.