Wireline dynamic sealing packer
A packer includes a cylinder of elastomer including: two flat ends, a longitudinal axis, an opening formed along the longitudinal axis, the opening configured to accommodate a cable, and at least one contact pressure feature running around a circumference of the cylinder. The cylinder is split perpendicular to the flat ends into two halves.
1 . A packer comprising:
a cylinder of elastomer comprising:
two flat ends;
a longitudinal axis;
an opening formed along the longitudinal axis, the opening configured to accommodate a cable; and
at least one contact pressure feature running around a circumference of the cylinder, the at least one contact pressure feature comprising at least one energizing ring extending around an outer circumference of the cylinder,
wherein the cylinder is split perpendicular to the flat ends into two halves, and
wherein compressing the packer axially causes the at least one energizing ring to exert a radial contact pressure on the cylinder of elastomer.
2 . The packer of claim 1 , wherein the at least one contact pressure feature further comprises at least one groove running around the outer circumference of the cylinder.
3 . The packer of claim 1 ,
wherein a radial thickness of the at least one energizing ring points inwardly toward the opening.
4 . The packer of claim 3 , further comprising an interlocking feature comprising a series of bumps and grooves on each of the two halves.
5 . The packer of claim 1 , further comprising an interlocking feature comprising a series of bumps and grooves on each of the two halves.
6 . The packer of claim 1 , further comprising an end cap disposed at each of the two flat ends, wherein the end caps are made of a material other than an elastomeric material.
7 . The packer of claim 6 , wherein the material of the two end caps has material properties different than the cylinder of elastomer.
8 . A system comprising:
a stack for pressure control equipment;
a cable that enters the pressure control equipment; and
the packer of claim 1 installed around the cable,
wherein the packer is mounted at a top of the stack.
9 . A method comprising:
providing a packer comprising:
a cylinder of elastomer comprising:
two flat ends;
a longitudinal axis;
an opening formed along the longitudinal axis; and
at least one contact pressure feature running around a circumference of the cylinder, wherein the at least one contact pressure feature comprises at least one energizing ring extending around an outer circumference of the cylinder, wherein the at least one energizing ring is coupled to the at least one contact pressure feature of the cylinder of elastomer such that the energizing ring exerts a radial contact
pressure on the cylinder of elastomer, and wherein the cylinder is split
perpendicular to the flat ends into two halves; and
installing the packer around a cable by disposing the cable in the opening.
10 . The method of claim 9 , further comprising:
mounting the packer to a top of a pressure control equipment stack.
11 . The method of claim 10 , further comprising:
compressing the packer axially to increase a radial contact pressure between the elastomer and the cable.
12 . A method comprising:
installing a packer around a cable by disposing the cable in an opening formed along a longitudinal axis of the packer, wherein the packer further comprises:
a cylinder of elastomer comprising:
two flat ends, wherein the cylinder is split perpendicular to the flat ends into two halves; and
at least one contact pressure feature running around a circumference of the cylinder, wherein the at least one contact pressure feature comprises at least one energizing ring extending around an outer circumference of the cylinder, and wherein the at least one energizing ring is coupled to the at least one contact pressure feature of the cylinder of elastomer such that the energizing ring exerts a radial contact pressure on the cylinder of elastomer;
mounting the packer to a top of a pressure control equipment stack;
compressing the packer axially to increase a radial contact pressure between the elastomer and the cable;
attaching a downhole tool to an end of the cable;
lowering the downhole tool via the cable through the pressure control equipment stack, through a wellhead, and into a wellbore; and
performing at least one operation in the wellbore using the cable.
13 . The method of claim 12 , wherein the at least one contact pressure feature further comprises at least one groove running around the outer circumference of the cylinder.
14 . The method of claim 12 ,
wherein a radial thickness of the at least one energizing ring points inwardly toward the opening.
15 . The method of claim 14 , wherein the packer further comprises an interlocking feature comprising a series of bumps and grooves on each of the two halves.
16 . The method of claim 12 , wherein the packer further comprises an interlocking feature comprising a series of bumps and grooves on each of the two halves.