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US 5,295,544 AGranted
Decentralized casing hole puncher
AssigneeDirectional Wireline Services, Inc.
InventorDonald V. Umphries
Life of this patent
Estimating the term…
Abstract
An explosive charge carrier is provided which is lowered into a well pipe casing. The carrier includes wear plates that slide along the inner diameter of the pipe and which are biased against the inner wall of the well pipe casing. A string of explosive charges having a density of up to six charges per foot are mounted between disks of the carrier which are separated by 12 inches. Spaced about the periphery of the separated disks are a maximum density of six strings of charges separated by 60.degree. for 36 explosive charges. Alternately, four strings of charges may be spaced about the periphery of the separated disks at a spacing of 90.degree. for 16 explosive charges.
Claims21
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges;
- (d) a biasing means mounted on and extending from said shaft for biasing said mounting means radially outwardly thereby moving said explosive charges mounted in said charge mounting means in relation to the inner surface of said pipe string;
- and
- (e) an adjusting means to adjust the biasing force exerted by said biasing means.
3 more elements
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- (c) a plurality of elongated relatively rigid charge mounting means having their respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges wherein each of said mounting means having at least one explosive charge mounted therein and a plurality of biasing means wherein each of said biasing means being adapted to independently bias each of said mounting means;
- and
- (d) a biasing means mounted on and extending from said shaft for biasing said mounting means radially outwardly thereby moving said explosive charges mounted in said charge mounting means in relation to the inner surface of said pipe string.
2 more elements
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges wherein said mounting means comprises a biwire having two legs extending through the explosive charges.
1 more element
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges wherein said mounting means comprises a formwire having two legs, said legs being curved at various locations to form a plurality of pairs of conjugated semi-loops for clippingly mounting the explosive charges.
1 more element
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges wherein said mounting means comprises a strip charge which is an elongated metal strip member having a plurality of threaded holes for threadably mounting the explosive charges.
1 more element
A decentralize casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges wherein said mounting means comprises a hollow carrier which is a sealable hollow metal tube containing explosive charges therein.
1 more element
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft wherein said hanger means comprises a disk having a diameter less than the inner diameter of said pipe string and wherein said disk being rotatably sleeved on said central shaft for spiraling said mounting means thereby capable of changing the phasing of said explosive charges;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges.
1 more element
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft wherein said hanger means comprises a disk having a diameter less than the inner diameter of said pipe string and wherein said disk comprises a plurality of keys on the radially outer periphery and extending therebeyond to prevent said disk from being stuck in interstic between pipe strings;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges.
1 more element
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft wherein said hanger means comprises a disk having a diameter less than the inner diameter of said pipe string and wherein said disk containing a plurality of debris holes adapted to allow fluids to flow therethrough and thereby facilitating the movement of said casing hole puncher upwardly and downwardly in said pipe;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges.
1 more element
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft wherein said hanger means comprises a disk having a diameter less than the inner diameter of said pipe string and wherein said disk further containing radially elongated slots formed therein adapted to allow the adjustment of the disposition of said charge mounting means in relation to said central shaft;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges.
1 more element
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- (c) a plurality of elongated relatively rigid charge mounting means having their respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges wherein said mounting means further comprising a pair of wear plates each being mounted near a longitudinal end thereof to provide a minimum clearance between the explosive charges and the inner surface of said pipe string;
- and
- (d) a biasing means mounted on and extending from said shaft for biasing said mounting means radially outwardly thereby moving said explosive charges mounted in said charge mounting means in relation to the inner surface of said pipe string.
2 more elements
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher wherein at least a portion of said central shaft is threaded;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- and
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges.
1 more element
A decentralized casing hole puncher for forming holes through a pipe string, comprising:
- (a) a centrally located solid shaft extending the entire length of said hole puncher;
- (b) a plurality of spaced apart hanger means sleeved on said shaft;
- (c) at least one elongated relatively rigid charge mounting means having its respective longitudinal ends affixed to a pair of said hanger means and extending therebetween for mounting explosive charges;
- and
- (d) a buffer means to dampen pressure shocks caused by explosion of said explosive charges mounted in said mounting means.
2 more elements
Dependencies are inferred from the claim text.