US20190063169A1 - One Trip Metal Seal Tieback Connection to Wellhead with Telescoping Joint - Google Patents
One Trip Metal Seal Tieback Connection to Wellhead with Telescoping Joint Download PDFInfo
- Publication number
- US20190063169A1 US20190063169A1 US15/686,632 US201715686632A US2019063169A1 US 20190063169 A1 US20190063169 A1 US 20190063169A1 US 201715686632 A US201715686632 A US 201715686632A US 2019063169 A1 US2019063169 A1 US 2019063169A1
- Authority
- US
- United States
- Prior art keywords
- metal
- telescoping joint
- wellhead
- string
- tieback
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
Definitions
- the field of the invention is tieback connections to a wellhead requiring specific space out in applications where metal to metal seals for high pressure applications are needed.
- Metal to metal tieback seals were developed by Baker Hughes, a GE company but they required continuous weight to hold a sealing connection. Due to thermal expansion or contraction concerns it was not certain in the past that such a connection would have the requisite weight on the connection, which forced the joint to be cemented to hold the connection together. The need to cement also added logistical complexities and cost particularly in offshore applications.
- Telescoping joints have been developed to address the space out issue by allowing as much as 7 meters leeway to connect to the wellhead hanger and avoid making a dummy run. Telescoping joints for subsea use are described in U.S. Pat. No. 9,664,000; 2015/0129240; U.S. Pat. No. 5,090,737 and U.S. Pat. No. 3,667,547.
- a tieback string assembly features a metal to metal nose seal weighted down with casing extending between a lower end of a telescoping joint also optionally having metal to metal seals for spacing out to a wellhead casing hanger.
- the telescoping joint is located so that the hanging weight off the telescoping joint lower end is sufficient to energize the metal to metal nose seal engaged to a sleeve or a liner top packer.
- the tieback string is smaller in outside diameter than the parent casing through which it is run. The assembly retains high pressure by avoiding lower pressure rated elastomers in the nose seal or the telescoping joint.
- FIG. 1 illustrates a part section view of a tieback string with metal to metal connections with a telescoping joint.
- FIG. 1 illustrates a profiled sleeve or existing liner top packer 10 into which a nose seal 14 that is metal to metal at the lower end of a tieback string 12 is set.
- a nose seal 14 that is metal to metal at the lower end of a tieback string 12 is set.
- the telescoping joint is positioned so that the weight of the string from the lower end 16 down to the nose seal 14 is at least the weight necessary to keep the connection integrity to contain high pressure as the telescoping joint 18 gets longer and shorter during normal operation.
- the use of the telescoping joint 18 also allows as much as 7 meters tolerance for initial space out to connect to the wellhead hanger 22 without making a dummy run to adjust for perfect space out.
Abstract
A tieback string assembly features a metal to metal nose seal weighted down with casing extending between a lower end of a telescoping joint optionally having metal to metal seals for spacing out to a wellhead casing hanger. The telescoping joint is located so that the hanging weight off the telescoping joint lower end is sufficient to energize the metal to metal nose seal engaged to a sleeve or a liner top packer. The tieback string is smaller in outside diameter than the parent casing through which it is run. The assembly retains high pressure by avoiding lower pressure rated elastomers in the nose seal or the telescoping joint.
Description
- The field of the invention is tieback connections to a wellhead requiring specific space out in applications where metal to metal seals for high pressure applications are needed.
- In assembling subsea wells there is often a distance that needs to be spanned between an upper end of a tubing string or an isolation packer and the wellhead. Frequently, in deep wells this distance could be 1524 meters or more. The spacing between the lower support location and a hanger in the wellhead needs to be closely approximated by the length of the assembled string in between. Stretch of the tubulars under their own weight complicates this space out. In the past this required what was called a dummy run where the string was landed on the lower support and assembled to the wellhead hanger location. The offset from the desired dimension was marked by closing BOP rams on painted DP joints. The string was then pulled so that sections could be replaced with different lengths and another trip in the hole was made to get the optimum spacing between the tubing or packer support in the wellbore and the wellhead hanger. On offshore applications this could be very costly in view of the additional rig time needed to make the additional trip and rig up and rig down casing equipment again.
- Metal to metal tieback seals were developed by Baker Hughes, a GE company but they required continuous weight to hold a sealing connection. Due to thermal expansion or contraction concerns it was not certain in the past that such a connection would have the requisite weight on the connection, which forced the joint to be cemented to hold the connection together. The need to cement also added logistical complexities and cost particularly in offshore applications.
- Telescoping joints have been developed to address the space out issue by allowing as much as 7 meters leeway to connect to the wellhead hanger and avoid making a dummy run. Telescoping joints for subsea use are described in U.S. Pat. No. 9,664,000; 2015/0129240; U.S. Pat. No. 5,090,737 and U.S. Pat. No. 3,667,547.
- What has not been available and is addressed by the present invention is a way to provide metal to metal tieback seal and keep it operative without a need to cement as in the past in a tieback string that saves a dummy run but at the same time allows for high pressure connections using metal to metal sealing optionally including the seals in a telescoping space out joint. The joint is located in the string at a depth where the weight of string connected to the lower end of the telescoping joint provides the weight to keep a metal to metal seal weighted so that it will function without a need for a cementing job, although cementing can still be optionally done. These and other aspects of the present invention can be more readily understood from a review of the description of the preferred embodiment and the associated drawings while recognizing that the full scope of the invention can be determined from the appended claims.
- A tieback string assembly features a metal to metal nose seal weighted down with casing extending between a lower end of a telescoping joint also optionally having metal to metal seals for spacing out to a wellhead casing hanger. The telescoping joint is located so that the hanging weight off the telescoping joint lower end is sufficient to energize the metal to metal nose seal engaged to a sleeve or a liner top packer. The tieback string is smaller in outside diameter than the parent casing through which it is run. The assembly retains high pressure by avoiding lower pressure rated elastomers in the nose seal or the telescoping joint.
-
FIG. 1 illustrates a part section view of a tieback string with metal to metal connections with a telescoping joint. -
FIG. 1 illustrates a profiled sleeve or existingliner top packer 10 into which anose seal 14 that is metal to metal at the lower end of atieback string 12 is set. To keep the needed weight on theseal 14 the length of the string between alower end 16 of atelescoping joint 18 that has metal tometal seal 20 provided. The telescoping joint is positioned so that the weight of the string from thelower end 16 down to thenose seal 14 is at least the weight necessary to keep the connection integrity to contain high pressure as the telescopingjoint 18 gets longer and shorter during normal operation. The use of thetelescoping joint 18 also allows as much as 7 meters tolerance for initial space out to connect to thewellhead hanger 22 without making a dummy run to adjust for perfect space out. - For operators with needs to contain high pressure in deep wells the combination of a telescoping joint placed in a string at a precise location so that hanging weight off the
joint 18 satisfies the need to keep a predetermined weight on the metal tometal seal 14 when used in combination with ajoint 18 that features metal seals as well, the assembly described provides the solution. - The above description is illustrative of the preferred embodiment and many modifications may be made by those skilled in the art without departing from the invention whose scope is to be determined from the literal and equivalent scope of the claims below:
Claims (4)
1. A method of connecting a tieback string to a wellhead hanger, comprising:
providing a metal to metal nose seal on a lower end of a tieback string;
connecting said nose seal to an existing string in the borehole;
locating a telescoping joint in the tieback string in a position where a lower portion of the tieback string connected to a lower portion of the telescoping joint provides weight needed to keep said nose seal activated.
2. The method of claim 1 , comprising:
providing a metal to metal seal in said telescoping joint.
3. The method of claim 1 , comprising:
cementing around said nose seal when said nose seal is connected to the existing string.
4. The method of claim 1 , comprising:
using the telescoping joint to adjust the length of the tieback string for connection to the wellhead.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/686,632 US20190063169A1 (en) | 2017-08-25 | 2017-08-25 | One Trip Metal Seal Tieback Connection to Wellhead with Telescoping Joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/686,632 US20190063169A1 (en) | 2017-08-25 | 2017-08-25 | One Trip Metal Seal Tieback Connection to Wellhead with Telescoping Joint |
Publications (1)
Publication Number | Publication Date |
---|---|
US20190063169A1 true US20190063169A1 (en) | 2019-02-28 |
Family
ID=65434888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/686,632 Abandoned US20190063169A1 (en) | 2017-08-25 | 2017-08-25 | One Trip Metal Seal Tieback Connection to Wellhead with Telescoping Joint |
Country Status (1)
Country | Link |
---|---|
US (1) | US20190063169A1 (en) |
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2017
- 2017-08-25 US US15/686,632 patent/US20190063169A1/en not_active Abandoned
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BAKER HUGHES, A GE COMPANY, LLC, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FRASER, JAMES M., III;ADAM, MARK K.;SIGNING DATES FROM 20170822 TO 20170825;REEL/FRAME:043677/0950 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |