Top entry sub arrangement

Inactive Publication Date: 2007-03-13
OIL STATES ENERGY SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]The sub of the present invention may be connected directly to the well string, such as a drill string, extending up from the rotary table and a wireline with the analytical tools connected thereto extended through the top entry port. This eliminates the need for 30 foot pipe joints connected above and below the sub to enable a wireline and its tools to be stepwise connected as above described with regard to U.S. Pat. No. 4,681,162.
[0013]Another object of the present invention is to provide a universal entry sub which employs a top entry for inserting various size and type objects in a well string and reduces the problems encountered with side entry subs presently in use.

Problems solved by technology

However, so far as known to applicants there is no above hole top entry sub available to receive wireline or coiled tubing or to use in a snubbing operation.
Prior entry subs have generally been limited to use with wireline or other substantially flexible conduits of relatively small diameter because of the limited entry angle.
This set-up operation is time consuming and expensive.
Also, the above side entry port cannot be employed with coiled tubing and cannot be employed in snubbing operations.

Method used

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Examples

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Embodiment Construction

[0021]Attention is first directed to FIG. 1 wherein the top entry sub ES of the present invention is shown as including a tubular member, referred to generally at TM having a main body section 8 with a lower end 9 with a lower end surface 10 thereon.

[0022]An enlarged external diameter upper end portion referred to generally at 11, extends upwardly from the main body section 8 of the tubular member. The enlarged upper end portion 11 has an upper end represented generally at 12 with an upper surface thereon shown generally at 12a.

[0023]In the FIG. 1 form of the top entry sub of the present invention, a single passage 15 extends through the main body section 8 which passage 15 is co-axial with the center line 16 of the main body section 8, as shown, and extends substantially the extent of the main body section 8 as shown in the drawings.

[0024]An upper pair of spaced, passages 14 and 14a are provided in upper end portion 11 and are inclined outwardly and upwardly relative to the centerl...

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Abstract

A top entry sub (ES) includes a tubular member (TM) with a main body section (8) and an enlarged external diameter upper end portion (11). A single passage (15) extends through the main body section (8) and terminates in a pair of spaced passages (14) and (14a) that extend through the enlarged external diameter end portion (11), which passages terminate in a common upper surface on the top entry sub (ES) for receiving a well string and providing an entry into the top entry sub for members such as coiled tubing, snubbing members and cable.

Description

STATEMENT OF THE PRIOR ART[0001]The only above hole entry sub presently in use known to applicants is that shown in U.S. Pat. No. 4,681,162 which is a side entry sub for receiving only a wireline cable therethrough for use in freeing stuck pipe in a well bore.[0002]However, so far as known to applicants there is no above hole top entry sub available to receive wireline or coiled tubing or to use in a snubbing operation. The side entry sub of the above referred to patent is used with a top drive power unit which is located above the working floor. Prior entry subs have generally been limited to use with wireline or other substantially flexible conduits of relatively small diameter because of the limited entry angle.[0003]The side entry sub of the above patent requires that a standard 30 foot joint of pipe be connected to its upper end and also to the lower end of the sub. The wireline is generally fed through the side entry opening and necessary tools for freeing the stuck pipe are t...

Claims

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Application Information

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IPC IPC(8): E21B19/08E21B23/00E21B17/02E21B33/072
CPCE21B17/025E21B33/072
InventorHELMS, CHARLES M.BLEIFELD, CHARLES W.
OwnerOIL STATES ENERGY SERVICES