TOOL TENSIONING HANGER SYSTEM
A tool tensioning hanger system is provided. The system comprises: a top sub sized and shaped to fit into an upper bowl of a tubing head in a well-head; a J-housing connected to a lower end of the top sub, the J-housing having two j-shaped slots that run lengthwise from a bottom end, each slot being 180 degrees from each other; and an inner joint configured to fit into the J-housing, the inner joint having two protruding pins 180 degrees from each other and configured to fit into the J-shaped slots. This system can be lowered through a Blow Out Preventer (BOP) without the need to remove the BOP.
The present disclosure relates to a tool tensioning hanger system for use in a wellhead.
BACKGROUNDIn the oil drilling industry, a tubing hanger is used to suspend and seal a tubing string in a casing head or tubing head. Typically they are installed in the tubing head and run through the BOP (Blow Out Preventer).
In most cases, the BOP must be removed to lower the tubing hanger. Removing the BOP allows the tubing to be pulled into tension by removing a pup joint that is used to set anchor. Without this procedure, the tubing would be in neutral and the pumping action would wear tubing and rods.
To remove the pup joint the BOP's need to be removed, allowing the well to be exposed to environment. In cases, where there is a split hanger, the BOP can remain in place but must be removed while the tubing is lowered.
SUMMARYThe present disclosure presents a tool tensioning hanger system that can be lowered without removing the BOP. The disclosed system has three separate components: a top sub; a lower mandrel/inner joint and a j-housing. The use of three components allows the inner joint/lower mandrel to release from the j-housing and be lowered down through the BOP. Once at setting depth, a bottom hole anchor can be set and packed off. Then the inner joint can be pulled up and re-latched into the j-housing to put the tubing into tension. To function the release of the inner mandrel from the tubing hanger assembly, there would be a pup joint (short tubing joint) attached at top end of inner mandrel. A service rig would pick up on the pup joint and then release from the hanger, lower to setting depth, set anchor, and pull the tubing into tension. Once in tension, the pup joint would be removed
Being able to keep the BOP in place and operational with the disclosed tool tensioning hanger system makes the tubing installation much safer.
To the accomplishment of the foregoing and related ends, certain illustrative aspects are described herein in connection with the following description and the annexed drawings. These aspects are indicative of the various ways in which the principles disclosed herein can be practiced. Other advantages and novel features will become apparent from the following detailed description when considered in conjunction with the drawings.
Referring to Figures, an embodiment of the disclosed tool tensioning hanger system will now be described. As shown in
To insert the inner joint 2 into the J-housing 3, the protruding pins are aligned with the J-shaped slots and the inner-joint 2 is pushed or pulled into the housing until the top of the j-shaped slots is reached. Then the inner joint 2 is then twisted until the pins slide into hooks at the end of the j-shaped slots. When the pins are in place in the hook portions of the j-shaped slots, the tool tensioning hanger system can securely hold tubing in place. This is the hanging position shown in
To disconnect the inner joint 2 as shown in
Referring now to
Referring now to
Referring now to
The dimensions shown in
In use, the described tool tensioning hanger system can be lowered without removing the BOP. The use of three components allows the inner joint/lower mandrel to release from the j-housing and be lowered down through the BOP. Once at setting depth, a bottom hole anchor can be set and packed off. Then the inner joint can be pulled up and re-latched into the j-housing to put the tubing into tension. To function the release of the inner mandrel from the tubing hanger assembly, there would be a pup joint (short tubing joint) attached at top end of inner joint. A service rig would pick up on the pup joint and then release from the hanger, lower to setting depth, set anchor, and pull the tubing into tension. Once in tension, the pup joint would be removed.
What has been described above includes examples of the disclosed architecture. It is, of course, not possible to describe every conceivable combination of components and/or methodologies, but one of ordinary skill in the art may recognize that many further combinations and permutations are possible. Accordingly, the novel architecture is intended to embrace all such alterations, modifications and variations. Furthermore, to the extent that the term “includes” is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term “comprising” as “comprising” is interpreted when employed as a transitional word in a claim.
The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiment was chosen and described in order to best explain the principles of the present invention and its practical application, to thereby enable others skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated.
Claims
1. A tool tensioning hanger system comprising:
- a top sub sized and shaped to fit into an upper bowl of a tubing head in a well-head;
- a J-housing connected to a lower end of the top sub, the J-housing having two j-shaped slots that run lengthwise from a bottom end, each slot being 180 degrees from each other; and
- an inner joint configured to fit into the J-housing, the inner joint having two protruding pins 180 degrees from each other and configured to fit into the J-shaped slots.
2. The tool tensioning hanger system of claim 1, wherein the j-shaped housing further comprises two v-shaped cut-outs at the bottom end, each v-shaped cut out having one of the two j-shaped slots starting at its apex.
3. The tool tensioning hanger system of claim 1, wherein the top sub and J-housing mated in threaded engagement.
4. The tool tensioning hanger system of claim 1, wherein the inner joint is threaded on the exterior on one end and threaded on the interior of the other end.
5. The tool tensioning hanger system of claim 1 made from steel.
6. The tool tensioning hanger system of claim 1 made from milled steel.
Type: Application
Filed: May 29, 2018
Publication Date: Dec 6, 2018
Inventor: Craig SMITH (Red Deer)
Application Number: 15/991,012