Electric annular with internal motor
Embodiments described herein provide a well valve assembly, comprising a housing having an axial passage for flowing well fluid through the tool; a component disposed within the housing around the axial passage, the component having a circular circumference and an outer wall with a circumferential thread on the outer wall; a gate assembly disposed within the housing and configured to open and close with axial movement of the component; a rotor disposed within the housing and having a structure for engaging with the circumferential thread on the outer wall to provide axial force on the component when the rotor rotates; a stator coupled to the rotor to rotate the rotor upon application of electric power; and a power conduit coupled to the stator to apply electric power to rotate the rotor.
1 . A blowout preventer, comprising:
a housing having an axial passage for flowing well fluid through the blowout preventer;
a component disposed within the housing around the axial passage, the component having a circular circumference and an outer wall with a circumferential thread on the outer wall of the component;
a gate assembly disposed within the housing and configured to open and close with axial movement of the component;
a rotor disposed within the housing and having a structure for engaging with the circumferential thread on the outer wall to provide axial force on the component when the rotor rotates;
a stator disposed within the housing and coupled to the rotor to rotate the rotor upon application of electric power;
a cap that engages with the housing at an end thereof, wherein the cap comprises a disk-like portion and an annular portion extending in an axial direction from the disk-like portion, wherein, when the cap is engaged with the housing, the disk-like portion contacts the gate assembly and the annular portion extends around a portion of the component, and wherein a distal end of the annular portion contacts the stator; and
a power conduit coupled to the stator to apply electric power to rotate the rotor.
2 . The blowout preventer of claim 1 , wherein the rotor is a ring, and the structure for engaging with the circumferential thread of the outer wall of the component is an inner circumferential thread.
3 . The blowout preventer of claim 1 , wherein the stator is a continuous ring disposed around the rotor.
4 . The blowout preventer of claim 1 , wherein the housing has an inner wall and an outer wall that define an annular receptacle, and the component, the rotor, and the stator are disposed within the annular receptacle.
5 . The blowout preventer of claim 4 , further comprising a guide member disposed between the component and the inner wall of the housing.
6 . The blowout preventer of claim 5 , wherein the component has an inner radial extension that constrains axial motion of the component by contacting an end of the guide member.
7 . The blowout preventer of claim 1 , wherein the power conduit is disposed through an end wall of the housing.
8 . The blowout preventer of claim 1 , wherein the component is a pushing member.
9 . A blowout preventer, comprising:
a housing having an axial passage for flowing well fluid through the blowout preventer, and the housing further having an inner wall and an outer wall that define an annular receptacle;
a component disposed within the housing around the axial passage, the component having a circular circumference and an outer wall with a circumferential thread on the outer wall of the component;
a guide member disposed between the component and the inner wall of the housing;
a gate assembly disposed within the housing and configured to open and close with axial movement of the component;
a rotor disposed within the housing and having a structure for engaging with the circumferential thread on the outer wall to provide axial force on the component when the rotor rotates;
a stator disposed within the housing and coupled to the rotor to rotate the rotor upon application of electric power; and
a power conduit coupled to the stator to apply electric power to rotate the rotor,
wherein the component, the rotor, and the stator are disposed within the annular receptacle.
10 . The blowout preventer of claim 9 , wherein the rotor is a ring, and the structure for engaging with the circumferential thread of the outer wall of the component is an inner circumferential thread.
11 . The blowout preventer of claim 9 , wherein the stator is a continuous ring disposed around the rotor.
12 . The blowout preventer of claim 9 , wherein the component has an inner radial extension that constrains axial motion of the component by contacting an end of the guide member.
13 . The blowout preventer of claim 9 , wherein the power conduit is disposed through an end wall of the housing.
14 . The blowout preventer of claim 9 , wherein the component is a pushing member.
15 . The blowout preventer of claim 9 , further comprising a cap that engages with the housing at an end thereof.